0001683825-24-000009 | 20-F | XBRL Viewer

Valuation and qualifying accounts (Tables)

12 Months Ended

Dec. 31, 2023

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

The following table presents the changes in our valuation and qualifying accounts not disclosed elsewhere in these financial statements.


(€ thousands)	Balance at Beginning of Period		Charges to Earnings		Deductions		Balance at End of Period
2021
Allowance for expected credit losses	€	348	€	330	€	(20)	€	658
2022
Allowance for expected credit losses	658		227		(467)		418
2023
Allowance for expected credit losses	418		640		(122)		936

Earnings per share (Details) - EUR (€) € / shares in Units, € in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Numerator:
Net income/(loss)	€ (164,476)	€ (127,218)	€ 10,704
Weighted average shares of Class A and Class B common stock outstanding:
Basic (in shares)	344,937,000	357,551,000	357,525,000
Diluted (in shares)	344,937,000	357,551,000	367,240,000
Net income/(loss) per share:
Basic (in Euro per share)	€ (0.48)	€ (0.36)	€ 0.03
Diluted (in Euro per share)	€ (0.48)	€ (0.36)	€ 0.03

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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+ Details

Consolidated statements of comprehensive income/(loss) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income/(loss)	€ (164,476)	€ (127,218)	€ 10,704
Other comprehensive income/(loss):
Currency translation adjustments	21	18	32
Total other comprehensive income	21	18	32
Comprehensive income/(loss) attributable to trivago N.V.	€ (164,455)	€ (127,200)	€ 10,736

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

Prepaid expenses and other current assets

12 Months Ended

Dec. 31, 2023

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Prepaid expenses and other current assets


	As of December 31,
(in thousands)	2023		2022
Prepaid advertising	€	6,429	€	6,284
Other prepaid expenses	4,393		2,035
Other assets	210		350
Total	€	11,032	€	8,669

In January 2021, we entered into a long-term marketing sponsorship agreement for various marketing rights. The final contractual installment payment under our long-term marketing sponsorship agreement was paid and €4.0 million has been included within prepaid advertising in the above table as of December 31, 2023.

Leases (Tables)

12 Months Ended

Dec. 31, 2023

Leases [Abstract]

Schedule of supplemental information, operating leases

Supplemental information related to operating leases was as follows:


	As of December 31,
(in thousands)	2023		2022
Cash paid for amounts included in the measurement of operating lease liabilities	€	3,722	€	3,828

Schedule of supplemental consolidated balance sheet information, operating leases

Supplemental consolidated balance sheet information related to leases were as follows:


	As of December 31,
(in thousands)	2023			2022
Operating lease right-of-use assets	€	42,273		€	45,028
Current operating lease liabilities	€	2,301		€	4,538
Long-term operating lease liabilities	€	38,434		€	40,729
Total operating lease liabilities	€	40,735		€	45,267
Weighted average remaining lease term	14.4 years			14.6 years
Weighted average discount rate	3.4		%	3.4		%

Schedule of maturities of operating lease liabilities

Maturities of operating lease liabilities are as follows:


	Year ended December 31,
(in thousands)	2023
2024	€	3,656
2025	3,640
2026	3,560
2027	3,560
2028	3,560
2029 and thereafter	33,520
Total lease payments	51,496
Less: imputed interest	(10,761)
Total	€	40,735

Goodwill and intangible assets, net - Intangible Assets with Definite Lives (Details) - EUR (€) € in Thousands	Dec. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Cost	€ 675	€ 675
(Accumulated Amortization)	(406)	(271)
Intangible assets with definite lives, net	269	404
Trademark/domain
Finite-Lived Intangible Assets [Line Items]
Cost	675	675
(Accumulated Amortization)	(406)	(271)
Intangible assets with definite lives, net	€ 269	€ 404

Acquisitions and other investments - Narrative, Other investments (Details) - EUR (€) € in Thousands		12 Months Ended
	Apr. 28, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]
Investment in equity-method investees		€ 0	€ 5,951	€ 0
UBIO Limited
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	20.80%
Equity method investment, ownership percentage, fully diluted	15.50%
Investment in equity-method investees	€ 5,900
Equity method investment, carrying value in excess of net assets	5,800
Equity method investment, basis difference, intangible assets	(2,200)
Equity method investment, basis difference, tax basis differences to be recovered	(400)
Equity method investment, basis difference, goodwill	€ 4,000

Property and equipment, net - Narrative (Details) - EUR (€) € in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2023	Dec. 31, 2022	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Net book value of long-lived assets transferred	€ 2,100
Property and equipment, net		€ 13,075	€ 10,079
Termination, May 31, 2023
Property, Plant and Equipment [Line Items]
Accrued penalty	€ 2,300
Software Development Costs
Property, Plant and Equipment [Line Items]
Property and equipment, net		5,300	5,400
Asset impairment charges		900
Computer equipment
Property, Plant and Equipment [Line Items]
Property and equipment, net		€ 1,300	€ 800

Goodwill and intangible assets, net - Summary (Details) - EUR (€) € in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	€ 0	€ 181,927	€ 286,539
Intangible assets with indefinite lives	75,345	89,545
Intangible assets with definite lives, net	269	404
Total	€ 75,614	€ 271,876

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References + Details

Commitments and contingencies (Details) € in Thousands	Dec. 31, 2023 EUR (€)
Purchase Obligation, Fiscal Year Maturity [Abstract]
Total	€ 26,845
Less than 1 year	14,539
1 to 3 years	12,266
3 to 5 years	40
More than 5 years	€ 0

Commitments and contingencies (Tables)

12 Months Ended

Dec. 31, 2023

Commitments and Contingencies Disclosure [Abstract]

Long-term purchase commitment

Commitments and obligations as of December 31, 2023 were as follows:


	By Period
(in thousands)	Total		Less than 1 year		1 to 3 years		3 to 5 years		More than 5 years
Purchase obligations	€	26,845	€	14,539	€	12,266	€	40	€	—

Share-based awards and other equity instruments - Stock options activities (Details) - EUR (€) € / shares in Units, € in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Options
Beginning balance (in shares)	27,357,798
Granted (in shares)	20,879,816
Exercised (in shares)	12,276,176
Canceled (in shares)	5,043,983
Ending balance (in shares)	30,917,455	27,357,798
Exercisable (in shares)	7,978,490
Weighted average exercise price
Beginning balance (in EUR per share)	€ 2.30
Granted (in EUR per share)	0.63
Exercised (in EUR per share)	0.06
Canceled (in EUR per share)	0.76
Ending balance, Weighted average exercise price (in EUR per share)	2.25	€ 2.30
Exercisable (in EUR per share)	€ 7.00
Remaining contractual life and Aggregate intrinsic value
Outstanding, remaining contractual life (in years)	7 years	10 years
Exercisable, remaining contractual life (in years)	9 years
Beginning balance, aggregate intrinsic value	€ 23,179
Ending balance, aggregate intrinsic value	3,074	€ 23,179
Exercisable, aggregate intrinsic value	€ 377
Shares withheld for tax withholding obligation	6,407,312

Goodwill and intangible assets, net - Goodwill rollforward (Details) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Roll Forward]
Goodwill, beginning balance	€ 181,927	€ 286,539
Foreign exchange translation		30
Impairment charge	(181,927)	(104,642)
Goodwill, ending balance	0	181,927
Developed Europe
Goodwill [Roll Forward]
Goodwill, beginning balance	95,451	200,067
Foreign exchange translation		26
Impairment charge	(95,451)	(104,642)
Goodwill, ending balance	0	95,451
Americas
Goodwill [Roll Forward]
Goodwill, beginning balance	86,476	86,472
Foreign exchange translation		4
Impairment charge	(86,476)	0
Goodwill, ending balance	0	86,476
Rest of World
Goodwill [Roll Forward]
Goodwill, beginning balance	0	0
Foreign exchange translation		0
Impairment charge	0	0
Goodwill, ending balance	€ 0	€ 0

- Definition

+ References + Details

Leases - Supplemental consolidated balance sheet information, operating leases (Details) - EUR (€) € in Thousands	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Operating lease right-of-use assets	€ 42,273	€ 45,028
Current operating lease liabilities	2,301	4,538
Long-term operating lease liabilities	38,434	40,729
Total operating lease liabilities	€ 40,735	€ 45,267
Weighted average remaining lease term	14 years 4 months 24 days	14 years 7 months 6 days
Weighted average discount rate	3.40%	3.40%

Property and equipment, net

12 Months Ended

Dec. 31, 2023

Property, Plant and Equipment [Abstract]

Property and equipment, net


	As of December 31,
(in thousands)	2023		2022
Leasehold improvements	€	4,117	€	6,865
Capitalized software and software development costs	30,065		28,867
Computer equipment	15,375		15,916
Furniture and fixtures	2,999		3,045

Subtotal	52,556		54,693
Less: accumulated depreciation	42,477		42,175
Construction in process	—		557
Property and equipment, net	€	10,079	€	13,075

Our headquarters in Düsseldorf, Germany is accounted for as an operating lease, and consequently the operating lease right-of-use ("ROU") assets and operating lease liabilities are recognized on our consolidated balance sheets (see Note 2 - Significant accounting policies - Leases and Note 7 - Leases for further information).

Pursuant to the amendment of the operating lease agreement for office space signed in January 2021, the Company sold and transferred long-lived assets with a net book value of €2.1 million to the landlord in the quarter ended June 30, 2023. This transaction is offset by the lease termination penalty payment to the landlord of €2.3 million. The net amount is recorded in accrued expenses and other current liabilities

in the consolidated balance sheet as of December 31, 2023. There was no significant gain/loss recorded on the sale of these fixed assets. See Note 7 - Leases for additional details on the transaction.

As of December 31, 2023 and 2022, our internally developed capitalized software and acquired software development costs, net of accumulated amortization, were €5.4 million and €5.3 million, respectively. During the year ended December 31, 2022, we recorded an impairment of €0.9 million related to acquired software and internally capitalized software development costs. We recognized the loss on impairment within our operating expenses.

As of December 31, 2023 and 2022, our computer equipment costs, net of accumulated amortization, were €0.8 million and €1.3 million, respectively.

Acquisitions and other investments - Narrative, Acquisitions (Details) - EUR (€) € in Millions		3 Months Ended	12 Months Ended
	Jan. 12, 2021	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Business Acquisition [Line Items]
Loss on contract termination			€ 0.5
Weekengo GmbH
Business Acquisition [Line Items]
Percentage of equity interest acquired	100.00%
Consideration for shares acquired	€ 6.7
Consideration for domain and trademark acquired	0.7
Payments to acquire businesses	€ 7.4
Increase in deferred tax assets, measurement period adjustment		€ 1.5
Deferred tax liabilities, measurement period adjustment		0.3
Decrease in goodwill, measurement period adjustment		€ 1.2
Revenue of acquiree				€ 0.2
Operating losses of acquiree				€ (2.3)

Commitments and contingencies

12 Months Ended

Dec. 31, 2023

Commitments and Contingencies Disclosure [Abstract]

Commitments and contingencies

Purchase obligations

We have commitments and obligations which include purchase commitments, which could potentially require our payment in the event of demands by third parties or contingent events. Commitments and obligations as of December 31, 2023 were as follows:


	By Period
(in thousands)	Total		Less than 1 year		1 to 3 years		3 to 5 years		More than 5 years
Purchase obligations	€	26,845	€	14,539	€	12,266	€	40	€	—

Our purchase obligations represent the minimum obligations we have under agreements with certain of our vendors. These minimum obligations are less than our projected use for those periods. Payments may be more than the minimum obligations based on actual use.

Legal proceedings

On August 23, 2018, the Australian Competition and Consumer Commission, or ACCC, instituted proceedings in the Australian Federal Court against us. The ACCC alleged a number of breaches of the Australian Consumer Law, or ACL, relating to certain advertisements in Australia concerning the hotel prices available on our Australian site, our Australian strike-through pricing practice and other aspects of the way offers for accommodation were displayed on our Australian website. The matter went to trial in September 2019, and on January 20, 2020, the Australian Federal Court issued a judgment finding that we had engaged in conduct in breach of the ACL. On March 4, 2020, we filed a notice of appeal at the Australian Federal Court appealing part of that judgment. On November 4, 2020, the Australian Federal Court dismissed trivago’s appeal. On October 18 and 19, 2021, the Australian Federal Court heard submissions from the parties in relation to relief. On April 22, 2022, the Australian Federal Court issued a judgment ordering us to pay a penalty of AUD 44.7 million. The court also ordered us to cover the ACCC's costs arising from the proceeding and enjoined us from engaging in misleading conduct of the type found

by the Australian Federal Court to be in contravention of the ACL. We paid the penalty balance of €29.6 million (AUD 44.7 million) in the second quarter of 2022 and costs arising from the proceedings.

In addition, two purported class actions have been filed in Israel and Ontario, Canada, making allegations about our advertising and/or display practices, such as search results rankings and algorithms, and discount claims. Plaintiffs’ motion for class certification in the Ontario action was denied on November 28, 2022. Plaintiffs have since filed a notice of appeal asking that the motion for class certification be granted. A hearing regarding that appeal took place on November 17, 2023, with a decision still pending. A case management hearing in the class action filed in Israel recently took place. The matter remains at a relatively early stage.

Consolidated statements of changes in equity - EUR (€) € in Thousands	Total	Common stock Class A common stock	Common stock Class B common stock	Treasury stock - Class A Common stock	Reserves	Retained earnings (accumulated deficit)	Accumulated other comprehensive income	Contribution from Parent
Beginning balance at Dec. 31, 2020	€ 664,517	€ 3,358	€ 178,913	€ 0	€ 798,017	€ (438,082)	€ 4	€ 122,307
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income/(loss)	10,704					10,704
Other comprehensive income (net of tax)	32						32
Share-based compensation expense	17,261				17,261
Conversion of Class B shares		2,174	(21,735)		19,561
Issuance of common stock related to exercise of options and vesting of RSUs, net	1,270	270			1,000
Ending balance at Dec. 31, 2021	693,784	5,802	157,178	0	835,839	(427,378)	36	122,307
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income/(loss)	(127,218)					(127,218)
Other comprehensive income (net of tax)	18						18
Share-based compensation expense	15,342				15,342
Conversion of Class B shares	0	1,469	(14,692)		13,223
Issuance of common stock related to exercise of options and vesting of RSUs, net	69	187			(118)
Repurchase of common stock	(20,259)			(20,259)
Reissuance of treasury stock				299	(299)
Ending balance at Dec. 31, 2022	561,736	7,458	142,486	(19,960)	863,987	(554,596)	54	122,307
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income/(loss)	(164,476)					(164,476)
Other comprehensive income (net of tax)	21						21
Share-based compensation expense	9,505				9,505
Issuance of common stock related to exercise of options and vesting of RSUs, net	365	397			(32)
Withholding taxes on net share settlements of equity awards	(6,456)				(6,456)
Treasury stock, retired, amount		1,200		19,960		18,760
Dividend paid to shareholders	(184,381)				(184,381)
Reclassification of share-based compensation expense from equity to liability	(1,290)				(1,290)
Ending balance at Dec. 31, 2023	€ 215,024	€ 6,655	€ 142,486	€ 0	€ 681,333	€ (737,832)	€ 75	€ 122,307

Leases - Narrative (Details) - EUR (€) € in Millions	12 Months Ended
Leases - Narrative (Details) - EUR (€) € in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Jun. 30, 2023
Lessee, Lease, Description [Line Items]
Option to extend term (in years)	10 years
Operating lease cost	€ 4.2	€ 4.9	€ 5.1
Variable lease costs	0.4	0.2	0.4
Sublease income	€ 0.1	€ 0.1	€ 0.1
Termination, May 31, 2023
Lessee, Lease, Description [Line Items]
Accrued penalty				€ 2.3
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term (in years)	2 years
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term (in years)	14 years

Share-based awards and other equity instruments (Tables)

12 Months Ended

Dec. 31, 2023

Share-Based Payment Arrangement [Abstract]

Schedule of stock options activity

The following table presents a summary of our share option activity:


	Options	Weighted average exercise price	Remaining contractual life	Aggregate intrinsic value
		(in €)	(In years)	(€ in thousands)








Balance as of January 1, 2023	27,357,798	2.30	10	23,179
Granted	20,879,816	0.63
Exercised (1)	12,276,176	0.06
Cancelled	5,043,983	0.76
Balance as of December 31, 2023	30,917,455	2.25	7	3,074
Exercisable as of December 31, 2023	7,978,490	7.00	9	377

(1) Inclusive of 6,407,312 options withheld due to net share settlements to satisfy required employee tax withholding requirements. Potential shares which had been convertible under options that were withheld under net share settlements remain in the authorized but unissued pool under the 2016 Omnibus Incentive Plan and can be issued by the Company. Total payments for the employees' tax obligations to the taxing authorities due to net share settlements are reflected as a financing activity within the consolidated statements of cash flows.

The following table summarizes information about share options vested and expected to vest as of December 31, 2023:


Fully Vested and Expected to Vest	Options	Weighted average exercise price	Remaining contractual life	Aggregate intrinsic value
		(in €)	(In years)	(€ in thousands)








Outstanding	22,757,455	2.83	7	2,294
Currently Exercisable	7,978,490	7.00	9	377

Schedule of RSU activity

The following table presents a summary of our restricted stock units (RSUs):


	RSUs	Weighted Average Grant Date Fair Value	Remaining contractual life
		(in €)	(in years)








Balance as of January 1, 2023	2,972,024	1.94	6
Granted	1,446,392	1.57
Vested (1)	1,092,205	1.85
Cancelled	1,123,436	1.69
Balance as of December 31, 2023	2,202,775	1.79	6

(1) Inclusive of 310,268 RSUs withheld due to net share settlements to satisfy required employee tax withholding requirements. Potential shares which had been convertible under RSUs that were withheld under net share settlements remain in the authorized but unissued pool under the 2016 Omnibus Incentive Plan and can be issued by the Company. Total payments for the employees' tax obligations to the taxing authorities due to net share settlements are reflected as a financing activity within the consolidated statements of cash flows.

Schedule of stock options valuation assumptions

The fair value of share awards granted during the years ended December 31, 2023, 2022 and 2021, were estimated at the date of grant using appropriate valuation techniques, including the Black-Scholes and Monte Carlo simulation pricing models, assuming the following weighted average assumptions:


	Year ended December 31,
	2023			2022			2021
Risk-free interest rate	3.31		%	1.04		%	(0.46)		%
Expected volatility	68		%	69		%	71		%
Expected life (in years)	4.96			4.31			4.41
Dividend yield	—		%	—		%	—		%
Weighted-average estimated fair value of options granted during the year	€	1		€	1		€	4

Commitments and contingencies - Narrative (Details) € in Millions, $ in Millions		3 Months Ended
	Apr. 22, 2022 AUD ($)	Jun. 30, 2023 EUR (€)	Jun. 30, 2023 AUD ($)	Dec. 31, 2023 claim
Australian Competition and Consumer Commission (ACCC) \| Pending Litigation
Loss Contingencies [Line Items]
Penalty judgment \| $	$ 44.7
Penalty payment		€ 29.6	$ 44.7
Advertising And Display Practices Allegations
Loss Contingencies [Line Items]
Number of claims \| claim				2

Consolidated statements of cash flows - EUR (€)
€ in Thousands

12 Months Ended

Dec. 31, 2023

Dec. 31, 2022

Dec. 31, 2021

Operating activities:

Net income/(loss)

€ (164,476)

€ (127,218)

€ 10,704

Adjustments to reconcile net income/(loss) to net cash provided by:

Depreciation (property and equipment, internal-use software and website development)

4,421

5,996

8,213

Amortization of intangible assets

^[1]

135

136

Goodwill and intangible assets impairment loss

196,127

184,642

Impairment of long-lived assets including internal-use software and website development

893

Share-based compensation

9,505

15,342

17,261

Deferred income taxes

(3,501)

(19,734)

8,856

Foreign exchange (gains)/losses

632

228

(1,554)

Expected credit losses, net

640

228

255

(Gain)/Loss on disposal of fixed assets

(18)

(6)

317

Gain from settlement of asset retirement obligation

(5)

Gain from lease termination and modification, net

(1,307)

Loss from equity method investment

221

401

Changes in operating assets and liabilities:

Accounts receivable, including related party

6,691

(10,114)

(25,754)

Prepaid expenses and other assets

(3,565)

1,557

(2,510)

Accounts payable

(2,389)

5,291

6,897

Payroll liabilities

(935)

(835)

297

Accrued expenses and other liabilities

1,358

(677)

2,738

Deferred revenue

(513)

(485)

(576)

Taxes payable/receivable, net

(16,532)

10,623

8,568

Net cash provided by operating activities

27,801

66,268

32,536

Investing activities:

Purchase of investments

(25,225)

(50,000)

(1,351)

Proceeds from sales and maturities of investments

45,000

5,000

19,338

Business acquisition, net of cash acquired

(4,302)

Capital expenditures, including internal-use software and website development

(3,514)

(3,976)

(3,781)

Investment in equity-method investees

(5,951)

Proceeds from sale of fixed assets

114

Net cash provided by/(used in) investing activities

16,289

(54,910)

10,018

Financing activities:

Proceeds from exercise of option awards

365

118

1,270

Payment of withholding taxes on net share settlements of equity awards

(6,380)

Repayment of other non-current liabilities

(46)

(112)

(217)

Purchases of treasury stock

(19,627)

Dividend paid to shareholders

(184,381)

Net cash provided by/(used in) financing activities

(190,442)

(19,621)

1,053

Effect of exchange rate changes on cash, cash equivalents and restricted cash

(385)

470

2,341

Net increase/(decrease) in cash, cash equivalents and restricted cash

(146,737)

(7,793)

45,948

Cash, cash equivalents and restricted cash at beginning of year

248,926

256,719

210,771

Cash, cash equivalents and restricted cash at end of year

102,189

248,926

256,719

Supplemental cash flow information:

Cash paid for interest

383

Cash received for interest

5,271

397

174

Cash paid for taxes, net of (refunds)

32,985

9,436

(4,848)

Non-cash investing and financing activities:

Fixed assets-related payable

€ 0

€ 3

[1]


(2) Includes amortization as follows:
Amortization of internal use software costs included in selling and marketing	€	—	€	8	€	98
Amortization of internal use software and website development costs included in technology and content	3,085		4,019		4,566
Amortization of internal use software costs included in general and administrative	—		104		313
Amortization of acquired technology included in amortization of intangible assets	135		136		136

Significant accounting policies

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Significant accounting policies

Consolidation

Our consolidated financial statements include the accounts of trivago and entities we control. Intercompany balances and transactions have been eliminated in consolidation. We deconsolidate entities from our results of operations on the day when we lose control. Further, the equity method of

accounting is used for investments in associated companies in which we have a financial interest but do not have control over.

As of December 31, 2023 and December 31, 2022, there are no noncontrolling interest balances, as all subsidiaries of the Company are wholly-owned.

Accounting estimates

We use estimates and assumptions in the preparation of our consolidated financial statements in accordance with accounting principles generally accepted in the United States (“GAAP”). Preparation of the consolidated financial statements and accompanying notes requires that we make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities as of the date of the consolidated financial statements, as well as revenue and expenses during the periods reported. Our actual financial results could differ significantly from these estimates. The significant estimates underlying our consolidated financial statements include: leases, recoverability of goodwill and indefinite-lived intangible assets, income taxes, and share-based compensation.

Revenue recognition

We recognize revenues when control of the promised goods or services is transferred to our customers, in an amount that reflects the consideration we expect to be entitled to in exchange for those goods or services. We derive our revenues from the following streams:

Referral Revenue

We earn Referral Revenue using cost-per-click ("CPC") and cost-per-acquisition ("CPA") models. Both relate to fees earned on the display of a customer's (advertiser's) link on the trivago website.

CPC revenue is recognized after the traveler makes the click-through to the related advertiser’s website. Control is deemed to have transferred at a point in time, being when the link or advertisement has been displayed and the click-through to the customer's website has occurred.

CPA revenue is recognized when the click-through to the related advertiser's website results in a booking, as control is deemed to have transferred at that point in time. We consider the performance obligation to be satisfied when the booking has occurred. The price that an advertiser pays for a click that results in a booking is based on a percentage of the booking revenue.

The prices per click for CPC and CPA advertising campaigns are negotiated in advance, thus, the amount to be recognized as revenue for the respective click is fixed and determinable when the performance obligation has been satisfied.

Most of our revenue is invoiced on a monthly basis after the performance obligation has been satisfied with payment terms between 10 to 30 days. For some advertisers we require prepayments.

Subscription Revenue

Revenue from subscription services is recognized ratably over the contract term, which is generally 12 months or less from the subscription commencement date. Customers may choose to be billed annually or monthly via Single Euro Payments Area ("SEPA") or credit card. The price per subscription is fixed and determinable when the contract commences.

Other Revenue

We also earn revenue by offering our advertisers business-to-business (B2B) solutions including: display advertisements, which are recognized as services are provided; access services, which are recognized based on the volume usage; and white label services, which are predominately recognized in accordance with CPC revenue. These revenue streams do not represent a significant portion of our revenue.

Deferred revenue

Deferred revenue relates to advanced payments received for services provided in future periods, primarily related to subscription services. At December 31, 2021, €2.2 million was recorded as deferred revenue, €2.1 million of which was recognized as revenue during the year ended December 31, 2022. At December 31, 2022, the deferred revenue balance was €1.7 million, €1.7 million of which was recognized as revenue during the year ended December 31, 2023. At December 31, 2023, the deferred revenue balance was €1.2 million.

Cost of revenue

Cost of revenue consists of expenses that are directly or closely correlated to revenue generation, including data center costs, third-party cloud-related service providers, salaries and share-based compensation for our data center operations staff and our customer service team who are directly involved in revenue generation. For the years ended December 31, 2023, 2022 and 2021, cost of revenue excludes €0.1 million each period, of amortization expense of acquired technology. For the years ended December 31, 2023, 2022 and 2021 cost of revenue excludes €3.1 million, €4.1 million and €5.0 million, respectively, of amortization expense related to internal use software and website development. Refer to footnote (2) of the consolidated statements of operations for amortization expense presentation within operating expenses.

Cash, cash equivalents and restricted cash

Our cash and cash equivalents include cash and liquid financial instruments, consisting of time deposit investments, with original maturities of three months or less when purchased.

Restricted cash includes cash and cash equivalents that is restricted through legal contracts. Our restricted cash primarily consists of funds held as guarantee in connection with our corporate lease. The carrying value of restricted cash approximates its fair value.

The following table reconciles cash, cash equivalents and restricted cash reported in our consolidated balance sheets to the total amount presented in our consolidated statements of cash flows:


	As of December 31,
(in thousands)	2023		2022
Cash & cash equivalents	€	101,847	€	248,584
Restricted cash included within current assets	342		342

Total	€	102,189	€	248,926

Accounts receivable

Accounts receivable are generally due within 10 to 30 days and are recorded net of an allowance for expected credit losses. We consider accounts outstanding longer than the contractual payment terms as past due. The risk characteristics we generally review when analyzing our accounts receivable pools primarily include the type of receivable, collection terms and historical or expected credit loss patterns. For each pool, we make estimates for the allowance based on the current expected credit loss ("CECL") methodology by considering a number of factors, including the length of time trade accounts receivable are past due, previous loss history continually updated for new collections data, the credit quality of our customers, current economic conditions, reasonable and supportable forecasts of future economic conditions and other factors that may affect our ability to collect from customers. The provision for estimated credit losses is recorded as general and administrative expense in our consolidated statements of operations.

Investments

Our short-term investments consist of term deposit accounts and government bonds with original maturity of more than three but fewer than 12 months. Our long-term investments, classified as investments and other assets, consist of an equity-method investment and term deposits with maturity of more than one year.

Non-marketable equity investments

We account for non-marketable equity investments which we exercise significant influence but do not have control using the equity method. Under the equity method, investments are initially recognized at cost and adjusted to reflect the Company’s interest in the investee's net earnings or losses, dividends received and other-than-temporary impairments. Losses are limited to the extent of the Company’s investment in, advances to and commitments for the investee.

On a quarterly basis, we perform a qualitative assessment considering impairment indicators to evaluate whether these investments are impaired. Qualitative factors considered include industry and market conditions, financial performance, business prospects, and other relevant events and factors. When indicators of impairment exist, we prepare a quantitative assessment of the fair value of our equity investments, which may include using both the market and income approaches that require judgment and the use of estimates. When our assessment indicates that an impairment, that is also "other-than temporary", exists, we write down our non-marketable equity investments to fair value.

Property and equipment, net including software and website capitalization

We record property and equipment at cost, net of accumulated depreciation and amortization. We compute depreciation using the straight-line method over the estimated useful lives of the assets, which is generally three to eight years for computer equipment, capitalized software and software development cost and furniture and other equipment. We amortize leasehold improvements using the straight-line method, over the shorter of the estimated useful life of the improvement or the remaining term of the lease.

Certain direct development costs associated with website and internal-use software are capitalized during the application development stage. Capitalized costs include external direct costs of services and payroll costs. The payroll costs are for employees devoting time to the software development projects principally related to website and mobile app development, including support systems, software coding, designing system interfaces and installation and testing of the software. These costs are recorded as property and equipment and are generally amortized over a period of three years beginning when the asset is ready for use. Costs incurred that are expected to result in additional features or functionality are capitalized and amortized over the estimated useful life of the enhancements, which is generally a period of three years. Costs incurred during the preliminary project stage, as well as maintenance and training costs, are expensed as incurred.

Certain acquired software licenses and implementation costs are capitalized during the implementation stage. Capitalized costs include the license fee, external direct costs of services provided in regards to the implementation and customization of the software, and internal payroll costs for employees involved with the implementation process. These costs are recorded as property and equipment and are amortized over the license term when the asset is ready for use. Costs incurred during the preliminary project stage, as well as maintenance and training costs, are expensed as incurred.

Leases

We determine if an arrangement is a lease at inception. Our operating leases primarily comprises of office space which includes our campus building lease. The operating leases balances are included in operating lease right-of-use ("ROU") assets and operating lease liabilities on our consolidated balance sheets. ROU assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. Operating lease ROU assets and lease liabilities are recognized at commencement date based on the present value of lease payments over the lease term. The Company uses its estimated incremental borrowing rate as the discount rate in

measuring the present value of lease payments given the rate implicit in our leases is not typically readily determinable. Estimating the incremental borrowing rate requires assessing a number of inputs including an estimated synthetic credit rating, collateral adjustments and interest rates. The operating lease ROU asset is comprised of the initial operating lease liability, adjusted for any prepaid or deferred rent payments, unamortized initial direct costs, and lease incentives received. Our lease terms include options to extend or terminate the lease when it is reasonably certain that we will exercise that option. Lease expense for lease payments is recognized on a straight-line basis over the lease term.

Payments under our operating leases are primarily fixed, however, certain of our operating lease agreements include rental payments which are adjusted periodically for inflation. We recognize these costs as variable lease costs in our consolidated statement of operations.

For operating leases with a term of one year or less, we have elected to not recognize a lease liability or ROU asset on our consolidated balance sheet. Instead, we recognize the lease payments as expense on a straight-line basis over the lease term. Short-term lease costs are immaterial to our consolidated statements of operations and cash flows.

We have lease agreements with insignificant non-lease components and have elected the practical expedient to combine and account for lease and non-lease components as a single lease component.

Additionally, we have entered into subleases for unoccupied leased office space. We recognize sublease payments on a straight-line basis over the term of the sublease.

Business combinations

We assign the value of the consideration transferred to acquire a business to the tangible assets and identifiable intangible assets acquired and liabilities assumed on the basis of their fair values at the date of acquisition. Any excess purchase price over the fair value of the net tangible and intangible assets acquired is allocated to goodwill. Adjustments may be made to the preliminary purchase price allocation when facts and circumstances that existed on the date of the acquisition become known during the measurement period subsequent to the preliminary purchase price allocation, not to exceed one year from the date of acquisition. When determining the fair values of assets acquired and liabilities assumed, management makes significant estimates and assumptions, especially with respect to intangible assets. Management’s estimates of fair value are based upon assumptions believed to be reasonable, but which are inherently uncertain and unpredictable and, as a result, actual results may differ from estimates.

Recoverability of goodwill and indefinite-lived intangible assets

Goodwill: Goodwill is assigned to our three reporting units, which correspond to our three operating segments, on the basis of their relative fair values. We assess goodwill for impairment annually as of September 30th, or more frequently, if events and circumstances indicate that an impairment may have occurred. In the evaluation of goodwill for impairment, we typically first perform a qualitative assessment to determine whether it is more likely than not that the fair value of each reporting unit is less than its carrying amount, followed by performing a quantitative assessment by comparing the fair value of the reporting unit to the carrying value, if necessary. Periodically, we may elect to bypass the initial qualitative assessment and proceed directly to the quantitative goodwill impairment test. An impairment charge is recorded based on the excess of the reporting unit's carrying amount over its fair value.

We generally base the measurement of fair value of our three reporting units on a blended analysis of the present value of future discounted cash flows and market valuation approach. The discounted cash flows model indicates the fair value of the reporting unit based on the present value of the cash flows that we expect the reporting unit to generate in the future. Our significant estimates in the discounted cash flows model include our weighted average cost of capital, revenue growth rates, profitability of our business and long-term rate of growth. The market valuation approach indicates the fair value of the business based on a comparison of the reporting unit to comparable publicly traded firms in similar lines of business. Our significant estimates in the market approach model include identifying similar companies with comparable business factors, such as size, growth, profitability, risk and return on investment, assessing comparable

revenue and operating income multiples and the control premium applied in estimating the fair value of the reporting unit.

We believe the weighted use of discounted cash flows and market approach is the best method for determining the fair value of our reporting units because these are the most common valuation methodologies used within the travel and Internet industries; and the blended use of both models compensates for the inherent risks associated with either model if used on a stand-alone basis.

In addition to measuring the fair value of our reporting units as described above, we consider the combined fair values of our reporting units and corporate-level assets and liabilities in relation to the Company’s total fair value of equity as of the assessment date, which assumes our fully diluted market capitalization, using either the stock price on the valuation date or the average stock price over a range of dates around the valuation date, plus an estimated acquisition premium which is based on observable transactions of comparable companies.

Indefinite-lived intangible assets: We assess indefinite-lived intangible assets for impairment annually as of September 30th, or more frequently, if events and circumstances indicate that an impairment may have occurred. In our evaluation of our indefinite-lived intangible assets, we typically first perform a qualitative assessment to determine whether the fair value of the indefinite-lived intangible assets is more likely than not impaired. If so, we perform a quantitative assessment and an impairment charge is recorded for the excess of the carrying value of the indefinite-lived intangible assets over the fair value. Periodically, we may elect to bypass the initial qualitative assessment and proceed directly to the quantitative impairment test of indefinite-lived intangible assets. We base our measurement of the fair value of our indefinite-lived intangible assets, which consist of trade name, trademarks and domain names, on the relief-from-royalty method. This method assumes that the trade name and trademarks have value to the extent that their owner is relieved of the obligation to pay royalties for the benefits received from them. This method requires us to estimate future revenue for the brand, the appropriate royalty savings rate and an applicable discount rate.

Recoverability of intangible assets with definite lives and other long-lived assets

Intangible assets with definite lives and other long-lived assets are carried at cost and are amortized on a straight-line basis over their estimated useful lives of generally less than seven years. We review the carrying value of long-lived assets or asset groups, including property and equipment whenever events or changes in circumstances indicate that the carrying amount of the assets might not be recoverable. Factors that would necessitate an impairment assessment include a significant adverse change in the extent or manner in which an asset is used, a significant adverse change in legal factors or the business climate that could affect the value of the asset, or a significant decline in the observable market value of an asset, among others. If such facts indicate a potential impairment, we would assess the recoverability of an asset group by determining if the carrying value of the asset group exceeds the sum of the projected undiscounted cash flows expected to result from the use and eventual disposition of the assets over the remaining economic life of the primary asset in the asset group. If the recoverability test indicates that the carrying value of the asset group is not recoverable, we will estimate the fair value of the asset group using appropriate valuation methodologies, which would typically include an estimate of discounted cash flows. Any impairment would be measured as the difference between the asset group’s carrying amount and its estimated fair value.

Income taxes

We record income taxes under the liability method. Deferred tax assets and liabilities reflect our estimation of the future tax consequences of temporary differences between the carrying amounts of assets and liabilities for book and tax purposes. We determine deferred income taxes based on the differences in accounting methods and timing between financial statement and income tax reporting. Accordingly, we determine the deferred tax asset or liability for each temporary difference based on the enacted tax rates expected to be in effect when we realize the underlying items of income and expense. We consider many factors when assessing the likelihood of future realization of our deferred tax assets, including our recent earnings experience by jurisdiction, expectations of future taxable income, and the

carryforward periods available to us for tax reporting purposes, as well as other relevant factors. We may establish a valuation allowance to reduce deferred tax assets to the amount we believe is more likely than not to be realized. Due to inherent complexities arising from the nature of our businesses, future changes in income tax law, tax sharing agreements or variances between our actual and anticipated results of operations, we make certain judgments and estimates. Therefore, actual income taxes could materially vary from these estimates.

We account for uncertain tax positions based on a two-step process of evaluating recognition and measurement criteria. The first step assesses whether the tax position is more likely than not to be sustained upon examination by the tax authority, including resolution of any appeals or litigation, based on the technical merits of the position. If the tax position meets the more likely than not criteria, the portion of the tax benefit greater than 50% likely to be realized upon settlement with the tax authority is recognized in the financial statements. Interest and penalties related to uncertain tax positions are classified in the financial statements as a component of income tax expense.

Presentation of taxes in the statements of operations

We present taxes that we collect from advertisers and remit to government authorities on a net basis in our consolidated statements of operations.

Interest income

Interest income presented in our consolidated statements of operations primarily consists of interest earned on our term deposits held with financial institutions and interest earned on our bank accounts.

Foreign currency translation and transaction gains and losses

The consolidated financial statements have been prepared in euros, the reporting currency. Certain of our operations outside of the Eurozone use the local currency as their functional currency. We translate revenue and expense at average exchange rates during the period and assets and liabilities at the exchange rates as of the consolidated balance sheet dates and include such foreign currency translation gains and losses as a component of other comprehensive income.

Due to the nature of our operations and our corporate structure, we also have subsidiaries that have transactions in foreign currencies other than their functional currency. We record transaction gains and losses in our consolidated statements of operations related to the recurring remeasurement and settlement of such transactions.

Foreign currency transaction gains and losses presented within other income and expense, other, net for the years ended December 31, 2023, 2022 and 2021 were as follows:


	As of December 31,
(in thousands)	2023		2022		2021
Foreign exchange gains/(losses), net	€	(632)	€	(228)	€	1,554

Advertising expense

We incur advertising expense consisting of offline costs, including television and radio advertising expense, online advertising expense, as well as sponsorship and endorsement expense, in order to promote our brands. A significant portion of traffic from users is directed to our websites through our participation in display advertising campaigns on search engines, advertising networks, affiliate websites and social networking sites. We consider traffic acquisition costs to be indirect advertising fees. We expense the production costs associated with advertisements in the period in which the advertisement first takes place. We expense the costs of communicating the advertisement (e.g., television airtime) as incurred each time the advertisement is shown. These costs are included in selling and marketing expense in our consolidated statements of operations.

Share-based compensation

Share-based compensation expense relates to stock awards granted in connection with the Omnibus Incentive Plan, as further discussed in Note 9 - Share-based awards and other equity instruments. For certain employee awards classified as liabilities, we remeasure these instruments at fair value at the end of each reporting period, representing the portion of the requisite service period rendered, until the award is settled. Forfeitures are accounted for in the period that the award is forfeited.

Share Options: The majority of our share options are service-based awards. We also grant awards that contain performance conditions which vest upon achievement of certain company-based targets and awards which contain market conditions which vest upon achievement of certain market-based targets, in addition to containing service conditions. The fair value of share options accounted for as equity settled transactions is measured at the grant date (or modification date, if applicable) using an appropriate valuation model, including the Black-Scholes option pricing model and, for awards that contain market-based vesting conditions, the Monte Carlo simulation pricing model. The majority of our share option awards vest between one and three years.

Restricted Stock Units: We grant Restricted Stock Units ("RSUs"), which are stock awards entitling the holder to shares of common stock as the award vests. For RSU awards with only service-based vesting conditions, we measure the value of RSUs at fair value based on the number of shares granted and the quoted price of our common stock at the date of grant. For RSU awards which contain market conditions, we estimate the fair value using the Monte Carlo simulation model. The majority of our RSU awards vest between one and three years.

We amortize the fair value of service-based awards, net of actual forfeitures, as share-based compensation expense over the vesting term on a straight-line basis.

Performance and Market-Based Awards.

Awards with company-based performance conditions are assessed to determine the probability of the award vesting. If assessed as probable, we record compensation expense for these awards over the total performance and service period using the accelerated method. At each reporting period, we reassess the probability of achieving the performance targets, which requires judgment. In the event that actual results or updated estimates differ from our current estimates, the cumulative effect on current and prior periods of those changes will be recorded in the period in which estimates are revised, or the change in estimate will be applied prospectively depending on whether the change affects the estimate of total compensation cost to be recognized. The ultimate number of shares issued and the related compensation expense recognized will be based on a comparison of the final performance metrics to the specified targets.

For awards with market conditions, the probabilities of the actual number of awards expected to vest is reflected in the grant date fair values. Compensation expense for these awards is recognized over the service period using the accelerated method.

The valuation models used incorporate various assumptions including expected volatility of equity, expected term and risk-free interest rates. The expected volatility is based on historical volatility of our common stock. We use the simplified method in determining the term by using the midpoint between the vesting date and the end of the contractual term. The simplified method was used as we do not have sufficient relatable historical term data available. The share price assumption used in the model is based on our publicly traded share price on the date of grant.

Estimates of fair value are not intended to predict actual future events or the value ultimately realized by employees who receive these awards, and subsequent events are not indicative of the reasonableness of our original estimates of fair value.

Reserves available for dividend distribution

Under Dutch law, we may only pay dividends to the extent that our shareholders’ equity (eigen vermogen) exceeds the sum of the paid-up and called-up share capital plus the reserves required to be maintained under Dutch law or by our articles of association (although we note that, presently, we are not required by

our articles of association to maintain reserves in addition to those which we must maintain under Dutch law). Refer to Note 11 - Stockholders' equity for further discussion on the distribution of the one-time extraordinary dividend paid in November 2023.

Subject only to such restrictions, any future determination to pay dividends will be at the discretion of our management board. In making a determination to pay dividends, the management board must act in the interests of our company and its business, taking into account relevant interests of our shareholders and other factors that our management board considers relevant, including our results of operations, financial condition, and future prospects.

For the years ended December 31, 2023 and 2022, our reserves restricted for dividend distribution were €154.6 million and €155.2 million, respectively.

Fair value recognition, measurement and disclosure

The carrying amounts of cash and cash equivalents, restricted cash and short-term investments reported on our consolidated balance sheets approximate fair value as we maintain them with various high-quality financial institutions. Our accounts receivable are short-term in nature and their carrying value generally approximates fair value.

We disclose the fair value of our financial instruments based on the fair value hierarchy using the following three categories:

Level 1 - Valuations based on quoted prices for identical assets and liabilities in active markets.

Level 2 - Valuations based on observable inputs other than quoted prices included in Level 1, such as quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets and liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data.

Level 3 - Valuations based on unobservable inputs reflecting the Company’s own assumptions, consistent with reasonably available assumptions made by other market participants. These valuations require significant judgment.

Certain risks and concentration of credit risk

Our business is subject to certain risks and concentrations including dependence on relationships with our advertisers, dependence on third-party technology providers, and exposure to risks associated with online commerce security. Our concentration of credit risk relates to depositors holding our cash and customers with significant accounts receivable balances.

Our customer base includes primarily OTAs, hotel chains and independent hotels. We perform ongoing credit evaluations of our customers and maintain allowances for potential credit losses. We generally do not require collateral or other security from our customers. Expedia Group, our controlling shareholder, and its affiliates represent 36%, 32% and 25%, respectively, of revenues for the years ended December 31, 2023, 2022 and 2021 and 45% and 49% of total accounts receivable as of December 31, 2023 and 2022. Booking Holdings and its affiliates represent 43%, 49% and 54%, respectively, of revenues for the years ended December 31, 2023, 2022 and 2021 and 25% and 30%, respectively, of total accounts receivable as of December 31, 2023 and 2022.

Contingent liabilities

From time to time, we may be involved in various claims and legal proceedings relating to claims arising out of our operations, as discussed further in Note 13 - Commitments and contingencies. Periodically, and at year end, we review the status of all significant outstanding matters to assess the potential financial exposure. When (i) it is probable that an asset has been impaired or a liability has been incurred and (ii) the amount of the loss can be reasonably estimated, we record the estimated loss in our consolidated statements of operations. We provide disclosure in the notes to the consolidated financial statements for loss contingencies that do not meet both of these conditions if there is a reasonable possibility that a loss may have been incurred that would be material to the financial statements. Significant judgment is

required to determine the probability that a liability has been incurred and whether such liability is reasonably estimable. We base accruals made on the best information available at the time, which can be highly subjective. The final outcome of these matters could vary significantly from the amounts included in the accompanying consolidated financial statements.

Government Grants

Government grants are recognized when there is reasonable assurance that the Company will comply with any conditions attached to the grant and the grant will be received. A government grant that compensates for expenses incurred is recognized in our consolidated statements of operations as a deduction from relevant expenses on a systematic basis in the periods in which the expenses are recognized. A government grant that becomes receivable for costs already incurred or for the purpose of giving immediate financial support to the Company, with no future related costs, is recognized as income in the period in which it becomes receivable.

During the year ended December 31, 2021, we took advantage of a COVID-19 subsidy program and received a €12.0 million grant from the German government. The German government provided this assistance to compensate for losses incurred as a result of the pandemic. The grant was recognized as other income and presented within the line item other, net in our consolidated statements of operations.

Treasury stock

The Company records the repurchase of shares of its common stock at cost on the trade date of the transaction. These shares are considered treasury stock, which is a reduction to stockholders’ equity.

Treasury stock is included in authorized and issued shares but is not considered outstanding for share count purposes, therefore is excluded from average common shares outstanding for basic and diluted earnings per share.

Treasury stock is held for the purpose of reissuance under share-based compensation plans or capital reduction (retirement). When treasury stock is reissued any gains are included as part of additional paid-in capital. Losses upon reissuance reduce additional paid-in capital to the extent that previous net gains from the same class of stock have been recognized and any losses above that are recognized as part of retained earnings (accumulated deficit). We use the first-in-first-out purchase cost to determine the cost of the treasury stock that is reissued. If treasury stock is retired, any cost in excess of par value will be recorded to retained earnings (accumulated deficit).

Adoption of new accounting pronouncements

Measurement of Credit Losses on Financial Instruments. As of January 1, 2023, we have prospectively adopted ASU 2022-02, which expands certain disclosure requirements for public business entities to include the current-period gross write-offs by year of origination for financing receivables and net investment in leases. Past due trade receivables written off that originate on our prior periods are typically not material. The adoption of this new guidance did not have a material impact to our consolidated financial statements.

Codification Improvements. In July 2023, the Financial Accounting Standards Board ("FASB") issued ASU 2023-03 which did not prescribe any new accounting guidance, but instead made minor improvements and clarifications on several different FASB ASC topics based on comments and suggestions made by various stakeholders and published SEC Staff Accounting Bulletins. The codification improvements applicable to us were adopted effective immediately. The adoption of the new guidance did not have a material impact on our consolidated financial statements.

Recent accounting pronouncements not yet adopted

Segment Reporting. In November 2023, the FASB issued ASU 2023-07, which modifies the disclosure and presentation requirements of reportable segments. The new guidance requires the disclosure of significant segment expenses that are regularly provided to the chief operating decision maker ("CODM") and included within each reported measure of segment profit and loss. In addition, the new guidance enhances interim disclosure requirements, clarifies circumstances in which an entity can disclose multiple

segment measures of profit or loss, provides new segment disclosure requirements for entities with a single reportable segment, and contains other disclosure requirements. The update is effective for annual periods beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. We are in the process of evaluating the impact of adopting this new guidance on our consolidated financial statement disclosures.

Income Taxes. In December 2023, the FASB issued ASU 2023-09 to improve its income tax disclosure requirements. Under the new guidance, public business entities must annually disclose specific categories in the rate reconciliation and provide additional information for reconciling items that meet a quantitative threshold (if the effect of those reconciling items is equal to or greater than 5 percent of the amount computed by multiplying pretax income (loss) by the applicable statutory income tax rate). The new standard is effective for fiscal years beginning after December 15, 2024. We are in the process of evaluating the impact of adopting this new guidance on our consolidated financial statement disclosures.

Subsequent events	12 Months Ended
Subsequent events	Dec. 31, 2023
Subsequent Events [Abstract]
Subsequent events	Subsequent events After the date of the balance sheet through the date of issuance of these consolidated financial statements, 689,355 Class A shares were issued as a result of options exercised and RSUs released. Effective January 11, 2024, we entered into a new commercial agreement with UBIO Limited, an equity method investment, to further increase the number of directly bookable rates available on our website for a term of 12 months with subsequent 12 month periods, unless it is terminated by either party with 90 days prior notice at the end of each period. The agreement includes an annual minimum commitment of €1.3 million (GBP 1.1 million). The German federal parliament passed legislation on December 14, 2019 which permits certain research and development projects to be eligible for refundable tax credits. In February 2024 we received a certificate from Bescheinigungsstelle Forschungszulage (BSFZ), the certification center for research grants in Germany, in response to our application filed in April 2023. Certain development costs associated with our website and internal-use software that were capitalized during the development stage between 2020 to 2022 were deemed eligible by BSFZ. We intend to apply for the tax credits in the coming months. The German tax authority may still reject or materially alter the claim. Accordingly, we will not recognize the benefit of the claim amount until the amount is realizable.

Goodwill and intangible assets, net (Tables)

12 Months Ended

Dec. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of goodwill and intangible assets

The following table presents our goodwill and intangible assets as of December 31, 2023 and 2022:


	Year ended December 31,
(in thousands)	2023		2022
Goodwill	€	—	€	181,927
Intangible assets with indefinite lives	75,345		89,545
Intangible assets with definite lives, net	269		404
Total	€	75,614	€	271,876

Schedule of goodwill

The following table presents the changes in goodwill by reporting segment:


(in thousands)	Developed Europe		Americas		Rest of World		Total
Balance as of January 1, 2022	€	200,067	€	86,472	€	—	€	286,539
Foreign exchange translation	26		4		—		30
Impairment charge	(104,642)		—		—		(104,642)

Balance as of December 31, 2022	€	95,451	€	86,476	€	—	€	181,927

Balance as of January 1, 2023	€	95,451	€	86,476	€	—	€	181,927

Impairment charge	(95,451)		(86,476)		—		(181,927)

Balance as of December 31, 2023	€	—	€	—	€	—	€	—

Components of intangible assets with definite lives

The following table presents the components of our intangible assets with definite lives as of December 31, 2023 and 2022:


	December 31, 2023						December 31, 2022
(in thousands)	Cost		(Accumulated Amortization)		Net		Cost		(Accumulated Amortization)		Net




Trademark/domain	€	675	€	(406)	€	269	€	675	€	(271)	€	404
Total	€	675	€	(406)	€	269	€	675	€	(271)	€	404

- Definition

Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef
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-URI https://asc.fasb.org//1943274/2147482573/350-20-50-2

+ Details

Segment information - Geographic information (Details) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	€ 485,031	€ 535,004	€ 361,465
Property and equipment, net	10,079	13,075
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	106,032	139,885	102,687
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	45,209	52,789	42,301
Property and equipment, net	10,040	13,012
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	55,867	68,554	41,389
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	29,240	31,899	11,862
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	39,016	19,200	5,999
All other countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	209,667	222,677	€ 157,227
Property and equipment, net	€ 39	€ 63

- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 924
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479941/924-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-5

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 30
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-30

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-42

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-22

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-32

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 40
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-40

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-22

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-32

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 41
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-41

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-4

+ Details

Significant accounting policies - Schedule of foreign currency gains and losses (Details) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accounting Policies [Abstract]
Foreign exchange gains/(losses), net	€ (632)	€ (228)	€ 1,554

Goodwill and intangible assets, net

12 Months Ended

Dec. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and intangible assets, net

The following table presents our goodwill and intangible assets as of December 31, 2023 and 2022:


	Year ended December 31,
(in thousands)	2023		2022
Goodwill	€	—	€	181,927
Intangible assets with indefinite lives	75,345		89,545
Intangible assets with definite lives, net	269		404
Total	€	75,614	€	271,876

Impairment Assessment

For the year ended December 31, 2023, we performed a quantitative impairment assessment for our annual impairment test as of September 30th. As a result, a cumulative goodwill and indefinite-lived intangible assets impairment charge of €196.1 million was recorded. We recorded impairment charges to the Developed Europe and Americas reporting unit goodwill balances of €95.5 million and €86.5 million, respectively which eliminated the goodwill balances in these reporting units. The impairment was driven by adjustments made to our profitability outlook arising from the announced strategy shift to long-term growth, share price decline during the third quarter of 2023, uncertainty in our operating environment, and the continued uncertainty in respect of the overall economic environment. We also performed a quantitative impairment assessment for our annual indefinite-lived intangible assets as of September 30th resulting in an impairment charge of €14.2 million.

For the year ended December 31, 2022, we performed two quantitative impairment assessments. Concurrently with our second quarter and annual goodwill impairment assessments in 2022, we also performed quantitative impairment assessments for our indefinite-lived intangible assets. We recorded a cumulative goodwill impairment charge of €104.6 million to our Developed Europe reporting unit and a cumulative impairment charge of €80.0 million to our indefinite-lived intangible assets for the year ended December 31, 2022. The impairments recorded in the prior year were due to deteriorating macroeconomic conditions, including rising interest rates, increased inflation and more uncertainty in respect of the overall economic environment which led to a shift in the Company’s internal priorities beginning in the second quarter of 2022.

During the goodwill impairment assessments performed, we compared the fair values of our reporting units to their carrying values. The fair value estimates for all reporting units were based on a blended analysis of the present value of future discounted cash flows and market value approach. The significant estimates used in the discounted cash flows model included our weighted average cost of capital, revenue growth rates, profitability of our business and long-term rate of growth. Our significant estimates in the market approach model included identifying similar companies with comparable business factors such as size, growth, profitability, risk and return on investment, assessing comparable revenue and earnings multiples and the control premium applied in estimating the fair values of the reporting units.

During the indefinite-live intangible asset impairment assessments performed, we base our measurement of the fair value using the relief-from-royalty method. This method assumes that the trade name and trademarks have value to the extent that their owner is relieved of the obligation to pay royalties for the benefits received from them. This method requires us to estimate future revenue for the brand, the appropriate royalty savings rate and an applicable discount rate.

Goodwill

The following table presents the changes in goodwill by reporting segment:


(in thousands)	Developed Europe		Americas		Rest of World		Total
Balance as of January 1, 2022	€	200,067	€	86,472	€	—	€	286,539
Foreign exchange translation	26		4		—		30
Impairment charge	(104,642)		—		—		(104,642)

Balance as of December 31, 2022	€	95,451	€	86,476	€	—	€	181,927

Balance as of January 1, 2023	€	95,451	€	86,476	€	—	€	181,927

Impairment charge	(95,451)		(86,476)		—		(181,927)

Balance as of December 31, 2023	€	—	€	—	€	—	€	—

As of December 31, 2023 and 2022, we had accumulated impairment losses for goodwill of €494.2 million and €312.3 million, respectively.

Intangible Assets with Indefinite Lives

Our indefinite-lived intangible assets relate principally to trade names, trademarks and domain names.

As of December 31, 2023 and 2022, we have accumulated impairment losses for indefinite-lived intangible assets of €94.2 million and €80.0 million, respectively.

Intangible Assets with Definite Lives

The following table presents the components of our intangible assets with definite lives as of December 31, 2023 and 2022:


	December 31, 2023						December 31, 2022
(in thousands)	Cost		(Accumulated Amortization)		Net		Cost		(Accumulated Amortization)		Net




Trademark/domain	€	675	€	(406)	€	269	€	675	€	(271)	€	404
Total	€	675	€	(406)	€	269	€	675	€	(271)	€	404

Amortization expense was €0.1 million for both years ended December 31, 2023 and 2022. The estimated future amortization expense related to intangible assets with definite lives as of December 31, 2023, assuming no subsequent impairment of the underlying assets, will be €0.1 million for each of the two succeeding fiscal years.

Significant accounting policies - Reconciliation of cash, cash equivalents, and restricted cash (Details) - EUR (€) € in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accounting Policies [Abstract]
Cash and cash equivalents	€ 101,847	€ 248,584
Restricted cash included within current assets	342	342
Total	€ 102,189	€ 248,926	€ 256,719	€ 210,771

- Definition

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References + Details

Share-based awards and other equity instruments - Narrative (Details)			3 Months Ended		12 Months Ended
	May 09, 2023 shares	Jul. 11, 2022 shares	Dec. 31, 2023 EUR (€) shares	Jun. 30, 2023 EUR (€)	Dec. 31, 2023 EUR (€) shares	Dec. 31, 2022 EUR (€)	Dec. 31, 2021 EUR (€)	Dec. 31, 2016 member	Nov. 02, 2023 € / shares	Nov. 02, 2023 $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Intrinsic value of shares exercised					€ 12,400,000	€ 3,100,000	€ 10,800,000
Number of awards cancelled (in shares) \| shares		2,032,743
Granted (in shares) \| shares					20,879,816
Reduction in strike price (in dollars per share) \| $ / shares										$ 0.57
Dividends payable (in euros per share) \| € / shares									€ 0.53
Share-based compensation reclassified from equity to liability			€ 1,300,000		€ 1,300,000
Share-based compensation					9,500,000	15,300,000	17,300,000
Income tax benefit related to share-based compensation expense					0	0	0
Proceeds from exercise of option awards					365,000	€ 118,000	€ 1,270,000
Unrecognized share-based compensation expense			15,700,000		€ 15,700,000
Unrecognized share-based compensation expense, period for recognition					2 years 6 months
Employee-Related Liabilities, Current
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation reclassified from equity to liability			1,100,000		€ 1,100,000
Other Noncurrent Liabilities
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation reclassified from equity to liability			200,000		€ 200,000
Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reduction to stock-based compensation expense			1,000,000	€ 1,300,000
Chief Financial Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reduction to stock-based compensation expense			€ 300,000
Employee Stock Option, Market-Based
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares) \| shares	8,160,000
Employee Stock Option, Service-Based
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares) \| shares	12,240,000
Award vesting period (in years)	3 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment award, term (in years)								10 years
Maximum \| RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)					3 years
2016 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant (in shares) \| shares			59,635,698		59,635,698
Number of supervisory board members in plan administration committee \| member								2
Share-based payment award, term (in years)								10 years

Related party transactions (Details) - EUR (€)
€ / shares in Units, € in Thousands

1 Months Ended

3 Months Ended

12 Months Ended

Nov. 03, 2023

Nov. 01, 2023

Jan. 01, 2023

Nov. 30, 2022

Dec. 31, 2023

May 30, 2022

Dec. 31, 2023

Dec. 31, 2022

Dec. 31, 2021

Revenue

€ 485,031

€ 535,004

€ 361,465

Dividend paid to shareholders

€ 184,400

184,381

Operating expenses

^[1],[2],[3]

€ 38,726

€ 60,852

€ 38,208

Treasury stock acquired (in shares)

Class A common stock

Treasury stock acquired (in shares)

205,457

Expedia | Revenue | Customer Concentration Risk

Concentration risk, percentage

36.00%

32.00%

25.00%

Revenue

€ 172,472

€ 173,307

€ 91,355

Accounts receivable, related party

€ 19,094

19,094

24,432

Related Party | Expedia

Revenue

172,500

173,300

91,300

Accounts receivable, related party

€ 19,100

19,100

24,400

Dividend paid to shareholders

110,600

Operating expenses

€ 200

200

€ 200

Termination notice period (in days)

30 days

Termination notice period (in days)

30 days

Termination notice period (in days)

30 days

Termination notice period (in days)

90 days

Operating expenses

€ 1,500

€ 500

Treasury stock acquired (in shares)

20,000,000

Treasury stock acquired, value

€ 19,300

Treasury stock acquired (in EUR per share)

€ 1.00

Dividend paid to shareholders

€ 15,100

Minimum | Related Party | Expedia

Prior notice period on customary commercial terms

14 days

Maximum | Related Party | Expedia

Prior notice period on customary commercial terms

30 days

[1]


	Year ended December 31,
	2023		2022		2021
(1) Includes share-based compensation as follows:
Cost of revenue	€	146	€	198	€	257
Selling and marketing	463		737		1,104
Technology and content	1,728		2,969		3,897
General and administrative	7,168		11,438		12,003

[2]


(2) Includes amortization as follows:
Amortization of internal use software costs included in selling and marketing	€	—	€	8	€	98
Amortization of internal use software and website development costs included in technology and content	3,085		4,019		4,566
Amortization of internal use software costs included in general and administrative	—		104		313
Amortization of acquired technology included in amortization of intangible assets	135		136		136

[3]


(3) Includes related party expense as follows:

Selling and marketing	€	94	€	97	€	111
Technology and content	1,618		541		48
General and administrative	63		1		—

Audit Information	12 Months Ended
Audit Information	Dec. 31, 2023
Audit Information [Abstract]
Auditor Firm ID	1251
Auditor Name	EY GmbH & Co. KG Wirtschaftsprüfungsgesellschaft
Auditor Location	Düsseldorf, Germany

Share-based awards and other equity instruments

12 Months Ended

Dec. 31, 2023

Share-Based Payment Arrangement [Abstract]

Share-based awards and other equity instruments

2016 Omnibus Incentive Plan

In connection with our IPO, we established the trivago N.V. 2016 Omnibus Incentive Plan, which we refer to as the 2016 Plan, with the purpose of giving us a competitive advantage in attracting, retaining and motivating officers, employees, management board members, supervisory board members, and/or consultants by providing them incentives directly linked to shareholder value. The maximum number of Class A shares available for issuance under the 2016 Plan as of December 31, 2023 are 59,635,698 Class A shares, which does not include any Class B share conversions. Class A shares issuable under the 2016 Plan are represented by ADSs for such Class A shares.

The 2016 Plan is administered by a committee of at least two members of our supervisory board, which we refer to as the plan committee. The plan committee must approve all awards to directors. Our management board may approve awards to eligible recipients other than directors, subject to annual aggregate and individual limits as may be agreed by the supervisory board. Subject to applicable law or the listing standards of the applicable exchange, the plan committee may delegate to other appropriate persons the authority to grant equity awards under the 2016 Plan to eligible award recipients. Management board members, supervisory board members, officers, employees and consultants of the company or any of our subsidiaries or affiliates, and any prospective directors, officers, employees and consultants of the company who have accepted offers of employment or consultancy from the company or our subsidiaries or affiliates are eligible for awards under the 2016 Plan.

Awards include options, performance-based stock options, share appreciation rights, restricted stock units, performance-based stock units and other share-based and cash-based awards. Awards may be settled in stock or cash. The option exercise price for options under the 2016 Plan can be less than the fair market value of a Class A share as defined in the 2016 Plan on the relevant grant date. To the extent that listing standards of the applicable exchange require the company’s shareholders to approve any repricing of options, options may not be repriced without shareholder approval. Options and share appreciation rights shall vest and become exercisable at such time and pursuant to such conditions as determined by the plan committee and as may be specified in an individual grant agreement. The plan committee may at any time accelerate the exercisability of any option or share appreciation right. Restricted shares may vest based on continued service, attainment of performance goals or both continued service and performance goals. The plan committee at any time may waive any of these vesting conditions.

Options and share appreciation rights will have a term of not more than ten years. The 2016 Plan has a ten year term, although awards outstanding on the date the 2016 Plan terminates will not be affected by the termination of the 2016 Plan. We issue new shares or reissue treasury shares held to satisfy the exercise or settlement of share-based awards.

The following table presents a summary of our share option activity:


	Options	Weighted average exercise price	Remaining contractual life	Aggregate intrinsic value
		(in €)	(In years)	(€ in thousands)








Balance as of January 1, 2023	27,357,798	2.30	10	23,179
Granted	20,879,816	0.63
Exercised (1)	12,276,176	0.06
Cancelled	5,043,983	0.76
Balance as of December 31, 2023	30,917,455	2.25	7	3,074
Exercisable as of December 31, 2023	7,978,490	7.00	9	377

The total intrinsic value of stock options exercised was €12.4 million, €3.1 million and €10.8 million for the years ended December 31, 2023, 2022 and 2021.

The following table summarizes information about share options vested and expected to vest as of December 31, 2023:


Fully Vested and Expected to Vest	Options	Weighted average exercise price	Remaining contractual life	Aggregate intrinsic value
		(in €)	(In years)	(€ in thousands)








Outstanding	22,757,455	2.83	7	2,294
Currently Exercisable	7,978,490	7.00	9	377

The following table presents a summary of our restricted stock units (RSUs):


	RSUs	Weighted Average Grant Date Fair Value	Remaining contractual life
		(in €)	(in years)








Balance as of January 1, 2023	2,972,024	1.94	6
Granted	1,446,392	1.57
Vested (1)	1,092,205	1.85
Cancelled	1,123,436	1.69
Balance as of December 31, 2023	2,202,775	1.79	6

On July 11, 2022, 2,032,743 market-based awards made to our management board were cancelled resulting in the remaining unrecognized compensation cost for the cancelled awards to be accelerated and recognized as share-based compensation expense on the date of cancellation.

On May 9, 2023, 8,160,000 market-based and 12,240,000 service-based options were granted to the new Managing Directors appointed at the annual general meeting of shareholders held on June 30, 2023. The

market-based awards cliff vest at the end of the performance period on June 30, 2027. The market condition is based upon trivago's volume-weighted average share price, which determines the number of shares earned. The service-based options vest annually over three years beginning on June 30, 2024 in equal increments.

Also on May 9, 2023, our former CEO resigned and concurrently signed an agreement to provide substantive consultancy services. As a result, a modification was made to the vesting conditions for the outstanding market-based and service-based options. As the modification date fair values of the unvested awards were lower than the original grant date fair values, we recorded a €1.3 million reduction in general and administrative compensation expense during the second quarter of 2023. Additionally, in accordance with our accounting policy to record forfeitures as they occur, we recorded a €1.0 million reduction in general and administrative compensation expense during the fourth quarter of 2023 as the consultancy agreement ended on December 31, 2023.

On October 3, 2023, our CFO signed an agreement to provide substantive consultancy services subsequent to his termination date of December 31, 2023. As a result, a modification was made to the vesting conditions for the outstanding market-based and service-based options. As the modification date fair values of the unvested awards were lower than the original grant date fair values, we recorded a €0.3 million reduction in general and administrative compensation expense during the fourth quarter of 2023.

On November 2, 2023, the Compensation Committee resolved to modify certain awards pursuant to the authority granted to it under the 2016 Plan to make adjustments in the event of an extraordinary dividend, as further described in Note 11 - Stockholders' equity. The modifications included reductions to the strike price of certain options by €0.53 (USD 0.57) (the rounded per share amount of the dividend stated in Note 11 - Stockholders' equity converted into U.S. dollars) per Class A settled option and also to provide holders of certain other options and RSUs with a fixed cash payment of €0.53 per Class A settled award that vests on or after November 2, 2023. As a result of the strike price modifications, no additional incremental share-based compensation expense was recorded. For the awards eligible for the fixed cash payment, an equity to liability modification resulted in a portion of share-based compensation expense previously recorded in equity to be reclassified as a liability. As of December 31, 2023, €1.1 million and €0.2 million of the amounts previously recognized in additional paid-in-capital for these awards were reclassified to payroll liabilities and other long-term liabilities, respectively, on the consolidated balance sheet.


	Year ended December 31,
	2023			2022			2021
Risk-free interest rate	3.31		%	1.04		%	(0.46)		%
Expected volatility	68		%	69		%	71		%
Expected life (in years)	4.96			4.31			4.41
Dividend yield	—		%	—		%	—		%
Weighted-average estimated fair value of options granted during the year	€	1		€	1		€	4

The Monte Carlo simulation model, which simulated the probabilities of the potential outcomes of future stock prices of the Company over the performance period, was used to calculate the grant-date fair value for awards with market conditions.

During the years ended December 31, 2023, 2022 and 2021, we recognized total share-based compensation expense of €9.5 million, €15.3 million and €17.3 million, respectively, which had no related income tax benefit.

Cash received from share-based award exercises for the years ended December 31, 2023, 2022 and 2021, was €0.4 million, €0.1 million and €1.3 million, respectively.

As of December 31, 2023, there was approximately €15.7 million in unrecognized share-based compensation expense related to unvested share-based awards subject to equity treatment, which is expected to be recognized in expense over the weighted average period of 2.5 years.

Subsequent events (Details) £ in Millions, $ in Millions			2 Months Ended	3 Months Ended	12 Months Ended
Subsequent events (Details) £ in Millions, $ in Millions	Jan. 11, 2024 USD ($)	Jan. 11, 2024 GBP (£)	Mar. 01, 2024 shares	Dec. 31, 2023	Dec. 31, 2023 shares
Subsequent Event [Line Items]
Exercised (in shares)					12,276,176
UBIO Limited \| Commercial Agreement \| Related Party
Subsequent Event [Line Items]
Termination notice period (in days)				90 days
Subsequent Event \| UBIO Limited \| Commercial Agreement \| Related Party
Subsequent Event [Line Items]
Term of agreement (in months)	12 months	12 months
Term of agreement, subsequent periods (in months)	12 months	12 months
Termination notice period (in days)	90 days	90 days
Minimum commitment	$ 1.3	£ 1.1
Subsequent Event \| Class A common stock
Subsequent Event [Line Items]
Number of shares issued under share-based payment arrangement (in shares)			689,355

Income taxes - Reconciliation of German statutory income tax rate to effective income tax rate (Details) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Statutory income tax rate, percent	31.20%	31.20%	31.20%
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest [Abstract]
Germany	€ (151,890)	€ (119,273)	€ 23,387
Other countries	26	(974)	(97)
Income/(loss) before income taxes	(151,864)	(120,247)	23,290
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income tax expense/(benefit) at German tax rate	(47,419)	(37,547)	7,272
Foreign rate differential	(1)	175	17
Expected tax expense/(benefit)	(47,420)	(37,372)	7,289
Tax effect from:
Non-deductible share-based compensation	2,968	4,791	5,390
Deductible share-based compensation liability awards	(401)	0	0
Non-deductible corporate costs	1,013	234	121
Goodwill impairment	56,807	32,674	0
Prior period taxes	(5)	192	(294)
Movement in valuation allowance	13	(57)	80
Movement in uncertain tax positions	(686)	6,311	56
Income tax effect resulting from weekengo asset deal transaction	0	0	1,938
Initial recognition of tax deductible goodwill and intangibles	0	0	(1,938)
Other differences	102	(203)	(56)
Income tax expense	€ 12,391	€ 6,570	€ 12,586

Valuation and qualifying accounts

12 Months Ended

Dec. 31, 2023

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

Valuation and qualifying accounts

The following table presents the changes in our valuation and qualifying accounts not disclosed elsewhere in these financial statements.


(€ thousands)	Balance at Beginning of Period		Charges to Earnings		Deductions		Balance at End of Period
2021
Allowance for expected credit losses	€	348	€	330	€	(20)	€	658
2022
Allowance for expected credit losses	658		227		(467)		418
2023
Allowance for expected credit losses	418		640		(122)		936

Consolidated balance sheets - EUR (€) € in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	€ 101,847	€ 248,584
Restricted cash	342	342
Short-term investments	25,225	45,000
Tax receivable	6,774	498
Prepaid expenses and other current assets	11,032	8,669
Total Current Assets	187,927	353,204
Property and equipment, net	10,079	13,075
Operating lease right-of-use assets	42,273	45,028
Investments & other assets	9,176	8,409
Intangible assets, net	75,614	89,949
Goodwill	0	181,927
TOTAL ASSETS	325,069	691,592
Current liabilities:
Accounts payable	17,930	19,941
Income taxes payable	2,087	12,325
Deferred revenue	1,176	1,689
Payroll liabilities	2,619	2,454
Accrued expenses and other current liabilities	9,874	8,675
Operating lease liability	2,301	4,538
Total Current Liabilities	35,987	49,622
Operating lease liability	38,434	40,729
Deferred income taxes	26,549	30,050
Other long-term liabilities	9,075	9,455
Commitments and contingencies (Note 13)
Stockholders' equity:
Treasury stock at cost - Class A shares, nil and 20,000,000 shares, respectively	0	(19,960)
Reserves	681,333	863,987
Contribution from Parent	122,307	122,307
Accumulated other comprehensive income	75	54
Accumulated deficit	(737,832)	(554,596)
Total stockholders' equity	215,024	561,736
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	325,069	691,592
Class A common stock
Stockholders' equity:
Common stock	6,655	7,458
Class B common stock
Stockholders' equity:
Common stock	142,486	142,486
Related Party
Current assets:
Accounts receivable, net of allowance for credit losses of €936 and €418, respectively	19,094	24,432
Accounts receivable, related party	19,094	24,432
Nonrelated Party
Current assets:
Accounts receivable, net of allowance for credit losses of €936 and €418, respectively	23,613	25,679
Accounts receivable, related party	€ 23,613	€ 25,679

Income Taxes - Narrative (Details) - EUR (€) € in Thousands	12 Months Ended			24 Months Ended
Income Taxes - Narrative (Details) - EUR (€) € in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2023
Operating Loss Carryforwards [Line Items]
Expense for income taxes	€ 12,391	€ 6,570	€ 12,586
Effective tax rate, percentage	(8.20%)	(5.50%)	54.00%
Share-based compensation	€ 9,500	€ 15,300	€ 17,300
Impact of non-deductible share-based compensation on effective tax rate, percentage	(2.00%)	(4.00%)	23.10%
Share-based compensation reclassified from equity to liability	€ 1,300			€ 1,300
Impact of deductible share-based compensation on effective tax rate, percentage	0.30%
Goodwill impairment loss	€ 181,900	€ 104,600
Impact of non-deductible impairment expense on goodwill on effective tax rate, percentage	(37.40%)	(27.20%)
Movement in uncertain tax positions	€ (686)	€ 6,311	€ 56
Impact of movement in uncertain tax positions on effective tax rate, percent	0.50%
Income tax effect resulting from weekengo asset deal transaction	€ 0	0	1,938
Current tax expense	15,892	26,304	3,730
Net operating loss carryforwards	1,300	1,300		1,300
Valuation allowance	1,339	1,329		1,339
Intangible assets, net	23,332	27,771		23,332
Impairment of indefinite-lived intangible assets	14,200	80,000		94,200
Impact of intangible asset impairment losses, amount	(4,400)
Undistributed earnings of foreign subsidiaries	1,800	€ 1,700		1,800
Undistributed earnings in domestic subsidiaries	18			€ 18
Trademarks
Operating Loss Carryforwards [Line Items]
Impairment of indefinite-lived intangible assets	€ 14,200
German
Operating Loss Carryforwards [Line Items]
Undistributed earnings in domestic subsidiaries, percentage	5.00%			5.00%
Percentage of tax exempt capital gains on sale of participations	95.00%			95.00%
Weekengo GmbH
Operating Loss Carryforwards [Line Items]
Deferred tax expense			1,300
Current tax expense			€ 600

Consolidated statements of operations (Parenthetical) - EUR (€)
€ in Thousands

12 Months Ended

Dec. 31, 2023

Dec. 31, 2022

Dec. 31, 2021

Share-based compensation

€ 9,500

€ 15,300

€ 17,300

Amortization of intangible assets

^[1]

135

136

General and administrative, including related party

^[1],[2],[3]

38,726

60,852

38,208

Internal use software costs

Amortization of intangible assets

3,100

4,100

5,000

Acquired technology

Amortization of intangible assets

135

136

Cost of revenue

Share-based compensation

146

198

257

Selling and marketing

Share-based compensation

463

737

1,104

General and administrative, including related party

111

Selling and marketing | Internal use software costs

Amortization of intangible assets

Technology and content

Share-based compensation

1,728

2,969

3,897

General and administrative, including related party

1,618

541

Technology and content | Internal use software costs

Amortization of intangible assets

3,085

4,019

4,566

General and administrative

Share-based compensation

7,168

11,438

12,003

General and administrative, including related party

General and administrative | Internal use software costs

Amortization of intangible assets

€ 0

€ 104

€ 313

[1]


(2) Includes amortization as follows:
Amortization of internal use software costs included in selling and marketing	€	—	€	8	€	98
Amortization of internal use software and website development costs included in technology and content	3,085		4,019		4,566
Amortization of internal use software costs included in general and administrative	—		104		313
Amortization of acquired technology included in amortization of intangible assets	135		136		136

[2]


	Year ended December 31,
	2023		2022		2021
(1) Includes share-based compensation as follows:
Cost of revenue	€	146	€	198	€	257
Selling and marketing	463		737		1,104
Technology and content	1,728		2,969		3,897
General and administrative	7,168		11,438		12,003

[3]


(3) Includes related party expense as follows:

Selling and marketing	€	94	€	97	€	111
Technology and content	1,618		541		48
General and administrative	63		1		—

Income taxes (Tables)

12 Months Ended

Dec. 31, 2023

Income Tax Disclosure [Abstract]

Schedule of components of income tax expense/(benefit)

The following table summarizes our income tax expense/(benefit):


	Year ended December 31,
(€ thousands)	2023		2022		2021
Current income tax expense:
Germany	€	15,883	€	26,239	€	3,729
Other countries	9		65		1
Current income tax expense	€	15,892	€	26,304	€	3,730
Deferred income tax expense/(benefit):
Germany	(3,501)		(19,763)		8,914
Other countries	—		29		(58)
Deferred income tax expense/(benefit)	€	(3,501)	€	(19,734)	€	8,856
Income tax expense	€	12,391	€	6,570	€	12,586

Schedule of income (loss) before income tax, domestic and foreign

The following table summarizes our income/(loss) before income taxes allocated to Germany and to other countries:


	Year ended December 31,
(€ thousands)	2023		2022		2021
Germany	€	(151,890)	€	(119,273)	€	23,387
Other countries	26		(974)		(97)
Income/(loss) before income taxes	€	(151,864)	€	(120,247)	€	23,290

Schedule of effective income tax rate reconciliation

A reconciliation of amounts computed by applying the German statutory income tax rate of 31.2% to income/(loss) before income taxes to total income tax expense is as follows:


	Year ended December 31,
(€ thousands)	2023		2022		2021
Income/(loss) before income taxes	€	(151,864)	€	(120,247)	€	23,290
Income tax expense/(benefit) at German tax rate	(47,419)		(37,547)		7,272
Foreign rate differential	(1)		175		17
Expected tax expense/(benefit)	€	(47,420)	€	(37,372)	€	7,289

Tax effect from:
Non-deductible share-based compensation	€	2,968	€	4,791	€	5,390
Deductible share-based compensation liability awards	(401)		—		—
Non-deductible corporate costs	1,013		234		121
Goodwill impairment	56,807		32,674		—
Prior period taxes	(5)		192		(294)
Movement in valuation allowance	13		(57)		80

Movement in uncertain tax positions	(686)		6,311		56
Income tax effect resulting from weekengo asset deal transaction	—		—		1,938
Initial recognition of tax deductible goodwill and intangibles	—		—		(1,938)
Other differences	102		(203)		(56)
Income tax expense	€	12,391	€	6,570	€	12,586

Schedule of uncertain tax positions

Uncertain tax positions as of December 31, 2023 and 2022 were as follows:


	Year Ended December 31,
(€ thousands)	2023		2022
Balance, beginning of year	€	9,238	€	2,927
Increases to tax positions related to the current year	—		6,289

Decreases to tax positions related to prior years	(720)		—
Interest and penalties	34		22
Balance, end of year	€	8,552	€	9,238

Schedule of deferred tax assets and liabilities

December 31, 2023 and 2022, the significant components of our deferred tax assets and deferred tax liabilities were as follows:


	Year Ended December 31,
(€ thousands)	2023		2022
Deferred tax assets:
Net operating loss and tax credit carryforwards	1,339		1,329


Accrued expenses and other current liabilities	—		42
Operating lease liability	14,705		14,135
Other long-term liabilities	33		35

Deferred tax assets (gross)	€	16,077	€	15,541
Less valuation allowance	(1,339)		(1,329)
Subtotal	€	14,738	€	14,212
Offsetting	(14,738)		(14,212)
Deferred tax assets	€	—	€	—

Deferred tax liabilities:
Cash and cash equivalents	—		51
Prepaid expense and other current assets	437		163
Intangible assets, net	23,332		27,771
Property and equipment	2,108		2,129
Operating lease right-of-use assets	15,185		14,060
Accrued expenses and other current liabilities	160		—
Other long-term liabilities	18		—
Other	47		88
Subtotal	€	41,287	€	44,262
Offsetting	(14,738)		(14,212)
Deferred tax liabilities	€	26,549	€	30,050

Earnings per share

12 Months Ended

Dec. 31, 2023

Earnings Per Share [Abstract]

Earnings per share

Basic and diluted earnings per share of Class A and Class B common stock is computed by dividing net income/(loss) by the weighted average number of Class A and Class B common stock outstanding during the same period. Diluted earnings per share is calculated using our weighted-average outstanding common shares including the dilutive effect of stock awards as determined under the treasury stock method.

The following table presents our basic and diluted earnings per share:


	Year Ended December 31,
(€ thousands, except per share data)	2023		2022		2021
Numerator:
Net income/(loss)	€	(164,476)	€	(127,218)	€	10,704



Denominator:
Weighted average shares of Class A and Class B common stock outstanding:
Basic	344,937		357,551		357,525
Diluted	344,937		357,551		367,240

Net income/(loss) per share:
Basic	€	(0.48)	€	(0.36)	€	0.03
Diluted	€	(0.48)	€	(0.36)	€	0.03

Diluted weighted average common shares outstanding in 2023 and 2022 do not include the effects of the exercise of outstanding stock options and RSUs as the inclusion of these instruments would have been anti-dilutive.

Income taxes - Uncertain tax positions (Details) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance, beginning of year	€ 9,238	€ 2,927
Increases to tax positions related to the current year	0	6,289
Decreases to tax positions related to prior years	(720)	0
Interest and penalties	34	22
Balance, end of year	€ 8,552	€ 9,238

Organization and basis of presentation	12 Months Ended
Organization and basis of presentation	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and basis of presentation	Organization and basis of presentation Description of business trivago N.V., (“trivago” the “Company,” “us,” “we” and “our”) and its subsidiaries offer online meta-search for hotel and accommodation through online travel agencies (“OTAs”), hotel chains and independent hotels. Our search-driven marketplace, delivered on websites and apps, provides users with a tailored search experience via our proprietary matching algorithms. We generally employ a ‘cost-per-click’ (or “CPC”) pricing structure, allowing advertisers to control their own return on investment and the volume of lead traffic we generate for them or a ‘cost-per-acquisition’ (or “CPA”) pricing structure, whereby an advertiser pays us a percentage of the booking revenues that ultimately result from a referral. During 2013, the Expedia Group, Inc. (formerly Expedia, Inc., the "Parent" or "Expedia Group") completed the purchase of a controlling interest in the Company. As of December 31, 2023, Expedia Group’s ownership interest and voting interest in trivago N.V. is 60.0% and 84.1%, respectively, and 61.2% and 84.3%, respectively, as of December 31, 2022. Basis of presentation Unless otherwise specified, “the Company” refers to trivago N.V. and its respective subsidiaries throughout the remainder of these notes. These consolidated financial statements reflect Expedia Group’s basis of accounting due to the change in control in 2013 when Expedia Group acquired a controlling ownership in trivago, as we elected the option to apply pushdown accounting in the period in which the change in control event occurred. Certain amounts previously reported in the consolidated financial statements have been reclassified in the accompanying consolidated financial statements to conform to the current period's presentation, primarily to separately present interest income, which was previously classified as other net income on the statements of operations. Seasonality We experience seasonal fluctuations in the demand for our services as a result of seasonal patterns in travel. For example, searches and consequently our revenue are generally the highest in the first three quarters as travelers plan and book their spring, summer and winter holiday travel. Our revenue typically decreases in the fourth quarter. We generally expect to experience higher return on advertising spend in the first and fourth quarter of the year as we typically expect to advertise less in the periods outside of high travel seasons. Seasonal fluctuations affecting our revenue also affect the timing of our cash flows. We typically invoice once per month, with customary payment terms. Therefore, our cash flow varies seasonally with a slight delay to our revenue, and is significantly affected by the timing of our advertising spending. Changes in the relative revenue share of our offerings in countries and areas where seasonal travel patterns vary from those described above may influence the typical trend of our seasonal patterns in the future.

Share-based awards and other equity instruments - Stock options fair value assumptions (Details) - € / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-Based Payment Arrangement [Abstract]
Risk-free interest rate	3.31%	1.04%	(0.46%)
Expected volatility	68.00%	69.00%	71.00%
Expected life (in years)	4 years 11 months 15 days	4 years 3 months 21 days	4 years 4 months 28 days
Dividend yield	0.00%	0.00%	0.00%
Weighted-average estimated fair value of options granted during the year (in EUR per share)	€ 1	€ 1	€ 4

Income taxes

12 Months Ended

Dec. 31, 2023

Income Tax Disclosure [Abstract]

Income taxes

The following table summarizes our income tax expense/(benefit):


	Year ended December 31,
(€ thousands)	2023		2022		2021
Current income tax expense:
Germany	€	15,883	€	26,239	€	3,729
Other countries	9		65		1
Current income tax expense	€	15,892	€	26,304	€	3,730
Deferred income tax expense/(benefit):
Germany	(3,501)		(19,763)		8,914
Other countries	—		29		(58)
Deferred income tax expense/(benefit)	€	(3,501)	€	(19,734)	€	8,856
Income tax expense	€	12,391	€	6,570	€	12,586

Reconciliation of German statutory income tax rate to effective income tax rate

The following table summarizes our income/(loss) before income taxes allocated to Germany and to other countries:


	Year ended December 31,
(€ thousands)	2023		2022		2021
Germany	€	(151,890)	€	(119,273)	€	23,387
Other countries	26		(974)		(97)
Income/(loss) before income taxes	€	(151,864)	€	(120,247)	€	23,290

A reconciliation of amounts computed by applying the German statutory income tax rate of 31.2% to income/(loss) before income taxes to total income tax expense is as follows:


	Year ended December 31,
(€ thousands)	2023		2022		2021
Income/(loss) before income taxes	€	(151,864)	€	(120,247)	€	23,290
Income tax expense/(benefit) at German tax rate	(47,419)		(37,547)		7,272
Foreign rate differential	(1)		175		17
Expected tax expense/(benefit)	€	(47,420)	€	(37,372)	€	7,289

Tax effect from:
Non-deductible share-based compensation	€	2,968	€	4,791	€	5,390
Deductible share-based compensation liability awards	(401)		—		—
Non-deductible corporate costs	1,013		234		121
Goodwill impairment	56,807		32,674		—
Prior period taxes	(5)		192		(294)
Movement in valuation allowance	13		(57)		80

Movement in uncertain tax positions	(686)		6,311		56
Income tax effect resulting from weekengo asset deal transaction	—		—		1,938
Initial recognition of tax deductible goodwill and intangibles	—		—		(1,938)
Other differences	102		(203)		(56)
Income tax expense	€	12,391	€	6,570	€	12,586

Income tax expense was €12.4 million, €6.6 million and €12.6 million for the years ended December 31, 2023, 2022 and 2021, respectively. Our effective tax rate was (8.2)%, (5.5)% and 54.0% in the years ended December 31, 2023, 2022 and 2021, respectively. Non-deductible share-based compensation of (pre-tax) €9.5 million, €15.3 million and €17.3 million had an impact on the effective tax rates of (2.0)%, (4.0)% and 23.1% in the years ended December 31, 2023, 2022 and 2021, respectively. Deductible amounts related to share-based compensation liability classified awards of (pre-tax) €1.3 million had an impact on the effective tax rate of 0.3% in the year ended December 31, 2023 as further discussed in Note 9 - Share-based awards and other equity instruments. Non-deductible impairment expenses on goodwill of (pre-tax) €181.9 million and €104.6 million had an impact on the effective tax rate of (37.4)% and (27.2)% in the years ended December 31, 2023 and 2022, respectively.

The uncertain tax position movement relates to the release of the liability recognized for the years 2017 and 2018 after our position was accepted by the tax authorities within the tax audit, which was closed in 2023. The release of €0.7 million in the uncertain tax position had an impact on the effective tax rate of 0.5% in the year ended December 31, 2023. Additional details on the movement in valuation allowance are included in the deferred income tax section below.

Following the weekengo share deal in January 2021, an intragroup asset deal took place in August 2021. The asset deal resulted in a deferred income tax benefit of €1.9 million on level of trivago N.V. for tax deductible goodwill and intangible assets. Correspondingly, an income tax expense resulted on the level of weekengo split into deferred tax expense of €1.3 million (utilization of tax loss carry forwards) and current tax expense of €0.6 million (minimum taxation). The tax effects resulting from the acquisition of shares and assets of weekengo were separate transactions in the year 2021.

Other differences relate to one-off items during the year, such as non-deductible expenses which are individually insignificant.

Uncertain tax positions

Uncertain tax positions as of December 31, 2023 and 2022 were as follows:


	Year Ended December 31,
(€ thousands)	2023		2022
Balance, beginning of year	€	9,238	€	2,927
Increases to tax positions related to the current year	—		6,289

Decreases to tax positions related to prior years	(720)		—
Interest and penalties	34		22
Balance, end of year	€	8,552	€	9,238

Tax audits

The Company is subject to audit by federal, state, local and foreign income tax authorities. The audit of tax returns for trivago N.V. from 2016 through 2018 for corporate income tax, trade tax and value-added tax was closed in 2023. As of December 31, 2023, there is no ongoing audit of tax returns for trivago N.V. for corporate income tax, trade tax and value-added tax. According to the statute of limitation, the German tax authorities may initiate additional audits of the tax years for 2019 through 2023.

Deferred income taxes

As of December 31, 2023 and 2022, the significant components of our deferred tax assets and deferred tax liabilities were as follows:


	Year Ended December 31,
(€ thousands)	2023		2022
Deferred tax assets:
Net operating loss and tax credit carryforwards	1,339		1,329


Accrued expenses and other current liabilities	—		42
Operating lease liability	14,705		14,135
Other long-term liabilities	33		35

Deferred tax assets (gross)	€	16,077	€	15,541
Less valuation allowance	(1,339)		(1,329)
Subtotal	€	14,738	€	14,212
Offsetting	(14,738)		(14,212)
Deferred tax assets	€	—	€	—

Deferred tax liabilities:
Cash and cash equivalents	—		51
Prepaid expense and other current assets	437		163
Intangible assets, net	23,332		27,771
Property and equipment	2,108		2,129
Operating lease right-of-use assets	15,185		14,060
Accrued expenses and other current liabilities	160		—
Other long-term liabilities	18		—
Other	47		88
Subtotal	€	41,287	€	44,262
Offsetting	(14,738)		(14,212)
Deferred tax liabilities	€	26,549	€	30,050

trivago N.V. is a Dutch listed entity, however has its tax residency in Germany. Deferred tax assets on net operating losses ("NOLs") related to the domestic and foreign subsidiaries were €1.3 million as of December 31, 2023 and 2022. As we have considered these tax loss carryforwards as not realizable, a valuation allowance of €1.3 million was recorded as of December 31, 2023 and 2022.

Deferred tax liabilities resulting from intangible assets decreased to €23.3 million as of December 31, 2023, from €27.8 million in 2022. The reduction was mainly driven by the trademark impairment charges of €14.2 million for the year ended December 31, 2023 that resulted in a deferred tax benefit of approximately €4.4 million.

The total cumulative amount of undistributed earnings related to investments in certain foreign subsidiaries where the foreign subsidiary has or will invest undistributed earnings indefinitely was €1.8 million and €1.7 million as of December 31, 2023 and December 31, 2022, respectively. In terms of undistributed earnings of domestic investments, we have recognized deferred income taxes on taxable temporary differences of €18 thousand, as only 5% refer to a taxable temporary difference under German tax law. Any capital gains on the sale of participations would be 95% exempt under German tax law.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480990/946-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(2))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org//740/tableOfContent

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482685/740-10-50-14

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 21
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482685/740-10-50-21

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 270
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482526/740-270-50-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 17
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482685/740-10-50-17

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 6.I.5.Q1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479360/740-10-S99-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 11.C)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479360/740-10-S99-2

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482603/740-30-50-2

+ Details

Segment information

12 Months Ended

Dec. 31, 2023

Segment Reporting [Abstract]

Segment information

Management has identified three reportable segments, which correspond to our three operating segments: the Americas, Developed Europe and Rest of World. Our Americas segment is comprised of Argentina, Brazil, Canada, Chile, Colombia, Ecuador, Mexico, Peru, the United States and Uruguay. Our Developed Europe segment is comprised of Austria, Belgium, Denmark, Finland, France, Germany, Ireland, Italy, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Our Rest of World segment is comprised of all other countries, the most significant by revenue of which are Japan, Turkey, Australia, Hong Kong and India.

We determined our operating segments based on how our chief operating decision makers manage our business, make operating decisions and evaluate operating performance. Our primary operating metric is Return on Advertising Spend, or ROAS, for each of our segments, which compares Referral Revenue to Advertising Spend. ROAS includes the allocation of revenue by segment which is based on the location of the website, or domain name, regardless of where the consumer resides. This is consistent with how management monitors and runs the business.

Corporate and Eliminations also includes all corporate functions and expenses except for direct advertising. In addition, we record amortization of intangible assets and any related impairment, share-based compensation expense, restructuring and related reorganization charges, legal reserves, occupancy tax and other taxes, and other items excluded from segment operating performance in Corporate and Eliminations. Such amounts are detailed in our segment reconciliations below. The following tables present our segment information for the years ended December 31, 2023, 2022 and 2021. As a significant portion of our property and equipment is not allocated to our operating segments and depreciation is not included in our segment measure, we do not report the assets by segment as it would not be meaningful. We do not regularly provide such information to our chief operating decision makers.


	Year Ended December 31, 2023
(€ thousands)	Developed Europe		Americas		Rest of World		Corporate & Eliminations		Total
Referral revenue	€	215,687	€	176,404	€	84,749	€	—	€	476,840
Subscription revenue	—		—		—		2,571		2,571
Other revenue	—		—		—		5,620		5,620
Total revenue	€	215,687	€	176,404	€	84,749	€	8,191	€	485,031
Advertising spend	147,713		118,965		56,469		—		323,147
ROAS contribution	€	67,974	€	57,439	€	28,280	€	8,191	€	161,884
Costs and expenses:
Cost of revenue, including related party, excluding amortization									11,971
Other selling and marketing, including related party (1)									22,492
Technology and content, including related party									49,020
General and administrative, including related party									38,726
Amortization of intangible assets									135
Impairment of intangible assets and goodwill									196,127
Operating loss									€	(156,587)
Other income/(expense)
Interest expense									(12)
Interest income									5,213
Other, net									(478)
Total other income/(expense), net									€	4,723
Loss before income taxes									€	(151,864)
Expense for income taxes									12,391
Loss before equity method investment									€	(164,255)
Loss from equity method investment									(221)
Net loss									€	(164,476)

(1) Represents all other sales and marketing, excluding Advertising Spend, as Advertising Spend is tracked by reporting segment.


	Year Ended December 31, 2022
(€ thousands)	Developed Europe		Americas		Rest of World		Corporate & Eliminations		Total
Referral revenue	€	237,692	€	216,406	€	67,692	€	—	€	521,790
Subscription revenue	—		—		—		3,398		3,398
Other revenue	—		—		—		9,816		9,816
Total revenue	€	237,692	€	216,406	€	67,692	€	13,214	€	535,004
Advertising spend	149,823		131,638		35,862		—		317,323
ROAS contribution	€	87,869	€	84,768	€	31,830	€	13,214	€	217,681
Costs and expenses:
Cost of revenue, including related party, excluding amortization									12,691
Other selling and marketing, including related party (1)									24,701
Technology and content, including related party									54,921
General and administrative, including related party									60,852
Amortization of intangible assets									136
Impairment of intangible assets and goodwill									184,642
Operating loss									€	(120,262)
Other income/(expense)
Interest expense									(51)
Interest income									622
Other, net									(556)
Total other income/(expense), net									€	15
Loss before income taxes									€	(120,247)
Expense for income taxes									6,570
Loss before equity method investment									€	(126,817)
Loss from equity method investment									(401)
Net loss									€	(127,218)

(1) Represents all other sales and marketing, excluding Advertising Spend, as Advertising Spend is tracked by reporting segment.


	Year Ended December 31, 2021
(€ thousands)	Developed Europe		Americas		Rest of World		Corporate & Eliminations		Total
Referral revenue	€	163,700	€	140,143	€	45,599	€	—	€	349,442
Subscription revenue	—		—		—		3,914		3,914
Other revenue	—		—		—		8,109		8,109
Total revenue	€	163,700	€	140,143	€	45,599	€	12,023	€	361,465
Advertising spend	106,984		94,096		22,470		—		223,550
ROAS contribution	€	56,716	€	46,047	€	23,129	€	12,023	€	137,915
Costs and expenses:
Cost of revenue, including related party, excluding amortization									11,500
Other selling and marketing, including related party (1)									25,646
Technology and content, including related party									52,374
General and administrative, including related party									38,208
Amortization of intangible assets									136

Operating income									€	10,051
Other income/(expense)
Interest expense									(389)

Interest income									174
Other, net									13,454
Total other income/(expense), net									€	13,239
Income before income taxes									€	23,290
Expense for income taxes									12,586


Net income									€	10,704

(1) Represents all other sales and marketing, excluding Advertising Spend, as Advertising Spend is tracked by reporting segment.

Geographic information

The following table presents revenue by geographic area for the years ended December 31, 2023, 2022 and 2021. Referral Revenue was allocated by country using the same methodology as the allocation of segment revenue, while non-Referral Revenue was allocated either based upon the location of the customer using the service, or using the same methodology as the allocation of segment revenue, depending on the nature of the non-Referral Revenue stream.


	Year ended December 31,
(in thousands)	2023		2022		2021
Total revenues
United States	€	106,032	€	139,885	€	102,687
Germany	45,209		52,789		42,301
United Kingdom	55,867		68,554		41,389
Canada	29,240		31,899		11,862

Japan	39,016		19,200		5,999
All other countries	209,667		222,677		157,227
	€	485,031	€	535,004	€	361,465

The following table presents property and equipment, net for Germany and all other countries, as of December 31, 2023 and 2022:


(€ thousands)	Years ended December 31,
	2023		2022
Property and equipment, net:
Germany	€	10,040	€	13,012
All other countries	39		63
	€	10,079	€	13,075

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-22

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-15

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 31
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-31

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-32

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-42

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-32

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 40
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-40

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org//280/tableOfContent

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 26
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-26

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 34
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-34

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 41
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-41

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 21
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-21

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 21
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-21

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-32

+ Details

Fair value measurement (Details) - Recurring - EUR (€) € in Thousands	Dec. 31, 2023	Dec. 31, 2022
Short-term investments
Term deposits	€ 25,225	€ 45,000
Investments and other assets:
Term deposits	1,351	1,351
Total	90,699	205,351
Deposits
Cash equivalents:
Cash equivalents	64,123	159,000
Level 2
Short-term investments
Term deposits	25,225	45,000
Investments and other assets:
Term deposits	1,351	1,351
Total	90,699	205,351
Level 2 \| Deposits
Cash equivalents:
Cash equivalents	€ 64,123	€ 159,000

Share-based awards and other equity instruments - Stock options vested and expected to vest (Details) € / shares in Units, € in Thousands	12 Months Ended
	Dec. 31, 2023 EUR (€) € / shares shares
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest [Abstract]
Outstanding (in shares) \| shares	22,757,455
Outstanding (in EUR per share) \| € / shares	€ 2.83
Outstanding, remaining contractual life (in years)	7 years
Outstanding, aggregate intrinsic value \| €	€ 2,294
Currently exercisable (in shares) \| shares	7,978,490
Currently exercisable (in EUR per share) \| € / shares	€ 7.00
Currently exercisable, remaining contractual life (in years)	9 years
Currently exercisable, aggregate intrinsic value \| €	€ 377

Leases

12 Months Ended

Dec. 31, 2023

Leases [Abstract]

Leases

We have operating leases for office space and office equipment. Our leases have remaining lease terms of less than two years to 14 years, inclusive of options to extend the lease for up to ten years.

Operating lease costs were €4.2 million, €4.9 million and €5.1 million for the years ended December 31, 2023, 2022 and 2021, respectively. Variable lease costs of €0.4 million and €0.2 million for the years ended December 31, 2023 and 2022 include cost-of-living index adjustments. Variable lease costs of €0.4 million for the year ended December 31, 2021 include short payment of rent to the landlord on account of defects identified in the office space in our corporate headquarters and cost-of-living index adjustments. The Company also had subleases mainly for office space under agreements which were terminated by the end of 2021; however, in 2022, we entered into a new sublease agreement for our Barcelona office space. Sublease income from such agreements was €0.1 million for the years ended December 31, 2023, 2022 and 2021.

On January 29, 2021, we entered into an amendment to the operating lease agreement for office space in our corporate headquarters, whereby the landlord agreed to grant us partial termination of the lease related to certain floor spaces. We surrendered the remainder of the leased space subject to the termination on May 31, 2023 for a €2.3 million penalty payment to the landlord. The penalty is offset by a sale of long-lived assets which were transferred to the landlord as a part of this transaction, see Note 6 - Property and equipment, net for additional details.

Supplemental information related to operating leases was as follows:


	As of December 31,
(in thousands)	2023		2022
Cash paid for amounts included in the measurement of operating lease liabilities	€	3,722	€	3,828

Supplemental consolidated balance sheet information related to leases were as follows:


	As of December 31,
(in thousands)	2023			2022
Operating lease right-of-use assets	€	42,273		€	45,028
Current operating lease liabilities	€	2,301		€	4,538
Long-term operating lease liabilities	€	38,434		€	40,729
Total operating lease liabilities	€	40,735		€	45,267
Weighted average remaining lease term	14.4 years			14.6 years
Weighted average discount rate	3.4		%	3.4		%

Maturities of operating lease liabilities are as follows:


	Year ended December 31,
(in thousands)	2023
2024	€	3,656
2025	3,640
2026	3,560
2027	3,560
2028	3,560
2029 and thereafter	33,520
Total lease payments	51,496
Less: imputed interest	(10,761)
Total	€	40,735

Segment information - Schedule of segment information (Details) - EUR (€)
€ in Thousands

12 Months Ended

Dec. 31, 2023

Dec. 31, 2022

Dec. 31, 2021

Segment Reporting Information [Line Items]

Revenue

€ 485,031

€ 535,004

€ 361,465

Advertising spend

323,147

317,323

223,550

ROAS contribution

161,884

217,681

137,915

Costs and expenses:

Cost of revenue, including related party, excluding amortization

^[1]

11,971

12,691

11,500

Other selling and marketing, including related party

22,492

24,701

25,646

Technology and content, including related party

^[1],[2],[3]

49,020

54,921

52,374

General and administrative, including related party

^[1],[2],[3]

38,726

60,852

38,208

Amortization of intangible assets

^[2]

135

136

Goodwill and intangible assets impairment loss

196,127

184,642

Operating income/(loss)

(156,587)

(120,262)

10,051

Other income/(expense)

Interest expense

(12)

(51)

(389)

Interest income

5,213

622

174

Other, net

(478)

(556)

13,454

Total other income/(expense), net

4,723

13,239

Income (loss) before income taxes

(151,864)

(120,247)

23,290

Expense for income taxes

12,391

6,570

12,586

Income/(loss) before equity method investment

(164,255)

(126,817)

10,704

Loss from equity method investment

(221)

(401)

Net income/(loss)

(164,476)

(127,218)

10,704

Operating Segments | Developed Europe

Segment Reporting Information [Line Items]

Revenue

215,687

237,692

163,700

Advertising spend

147,713

149,823

106,984

ROAS contribution

67,974

87,869

56,716

Operating Segments | Americas

Segment Reporting Information [Line Items]

Revenue

176,404

216,406

140,143

Advertising spend

118,965

131,638

94,096

ROAS contribution

57,439

84,768

46,047

Operating Segments | Rest of World

Segment Reporting Information [Line Items]

Revenue

84,749

67,692

45,599

Advertising spend

56,469

35,862

22,470

ROAS contribution

28,280

31,830

23,129

Corporate & Eliminations

Segment Reporting Information [Line Items]

Revenue

8,191

13,214

12,023

Advertising spend

ROAS contribution

8,191

13,214

12,023

Referral revenue

Segment Reporting Information [Line Items]

Revenue

476,840

521,790

349,442

Referral revenue | Operating Segments | Developed Europe

Segment Reporting Information [Line Items]

Revenue

215,687

237,692

163,700

Referral revenue | Operating Segments | Americas

Segment Reporting Information [Line Items]

Revenue

176,404

216,406

140,143

Referral revenue | Operating Segments | Rest of World

Segment Reporting Information [Line Items]

Revenue

84,749

67,692

45,599

Referral revenue | Corporate & Eliminations

Segment Reporting Information [Line Items]

Revenue

Subscription revenue

Segment Reporting Information [Line Items]

Revenue

2,571

3,398

3,914

Subscription revenue | Operating Segments | Developed Europe

Segment Reporting Information [Line Items]

Revenue

Subscription revenue | Operating Segments | Americas

Segment Reporting Information [Line Items]

Revenue

Subscription revenue | Operating Segments | Rest of World

Segment Reporting Information [Line Items]

Revenue

Subscription revenue | Corporate & Eliminations

Segment Reporting Information [Line Items]

Revenue

2,571

3,398

3,914

Other revenue

Segment Reporting Information [Line Items]

Revenue

5,620

9,816

8,109

Other revenue | Operating Segments | Developed Europe

Segment Reporting Information [Line Items]

Revenue

Other revenue | Operating Segments | Americas

Segment Reporting Information [Line Items]

Revenue

Other revenue | Operating Segments | Rest of World

Segment Reporting Information [Line Items]

Revenue

Other revenue | Corporate & Eliminations

Segment Reporting Information [Line Items]

Revenue

€ 5,620

€ 9,816

€ 8,109

[1]


	Year ended December 31,
	2023		2022		2021
(1) Includes share-based compensation as follows:
Cost of revenue	€	146	€	198	€	257
Selling and marketing	463		737		1,104
Technology and content	1,728		2,969		3,897
General and administrative	7,168		11,438		12,003

[2]


(2) Includes amortization as follows:
Amortization of internal use software costs included in selling and marketing	€	—	€	8	€	98
Amortization of internal use software and website development costs included in technology and content	3,085		4,019		4,566
Amortization of internal use software costs included in general and administrative	—		104		313
Amortization of acquired technology included in amortization of intangible assets	135		136		136

[3]


(3) Includes related party expense as follows:

Selling and marketing	€	94	€	97	€	111
Technology and content	1,618		541		48
General and administrative	63		1		—

Goodwill and intangible assets, net - Narrative (Details) - EUR (€)
€ in Thousands

12 Months Ended

24 Months Ended

Dec. 31, 2023

Dec. 31, 2022

Dec. 31, 2021

Dec. 31, 2023

Goodwill [Line Items]

Goodwill and intangible assets impairment loss

€ 196,127

€ 184,642

€ 0

Impairment of goodwill

181,927

104,642

Impairment of indefinite-lived intangible assets

14,200

80,000

€ 94,200

Accumulated impairment losses of goodwill

€ 494,200

€ 312,300

494,200

Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration]

Goodwill and intangible assets impairment loss

Amortization of intangible assets

^[1]

€ 135

€ 136

2024

100

2025

100

€ 100

Developed Europe

Goodwill [Line Items]

Impairment of goodwill

95,500

€ 104,600

Americas

Goodwill [Line Items]

Impairment of goodwill

€ 86,500

[1]


(2) Includes amortization as follows:
Amortization of internal use software costs included in selling and marketing	€	—	€	8	€	98
Amortization of internal use software and website development costs included in technology and content	3,085		4,019		4,566
Amortization of internal use software costs included in general and administrative	—		104		313
Amortization of acquired technology included in amortization of intangible assets	135		136		136

Income taxes - Deferred income taxes (Details) - EUR (€) € in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets:
Net operating loss and tax credit carryforwards	€ 1,339	€ 1,329
Accrued expenses and other current liabilities	0	42
Operating lease liability	14,705	14,135
Other long-term liabilities	33	35
Deferred tax assets (gross)	16,077	15,541
Less valuation allowance	(1,339)	(1,329)
Subtotal	14,738	14,212
Offsetting	(14,738)	(14,212)
Deferred tax assets	0	0
Deferred tax liabilities:
Cash and cash equivalents	0	51
Prepaid expense and other current assets	437	163
Intangible assets, net	23,332	27,771
Property and equipment	2,108	2,129
Operating lease right-of-use assets	15,185	14,060
Accrued expenses and other current liabilities	160	0
Other long-term liabilities	18	0
Other	47	88
Subtotal	41,287	44,262
Offsetting	(14,738)	(14,212)
Deferred tax liabilities	€ 26,549	€ 30,050

Valuation and qualifying accounts (Details) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	€ 418	€ 658	€ 348
Charges to Earnings	640	227	330
Deductions	(122)	(467)	(20)
Balance at End of Period	€ 936	€ 418	€ 658

Earnings per share (Tables)

12 Months Ended

Dec. 31, 2023

Earnings Per Share [Abstract]

Schedule of basic and diluted earnings per share

The following table presents our basic and diluted earnings per share:


	Year Ended December 31,
(€ thousands, except per share data)	2023		2022		2021
Numerator:
Net income/(loss)	€	(164,476)	€	(127,218)	€	10,704



Denominator:
Weighted average shares of Class A and Class B common stock outstanding:
Basic	344,937		357,551		357,525
Diluted	344,937		357,551		367,240

Net income/(loss) per share:
Basic	€	(0.48)	€	(0.36)	€	0.03
Diluted	€	(0.48)	€	(0.36)	€	0.03

Leases - Maturities of operating lease liabilities (Details) - EUR (€) € in Thousands	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
2024	€ 3,656
2025	3,640
2026	3,560
2027	3,560
2028	3,560
2029 and thereafter	33,520
Total lease payments	51,496
Less: imputed interest	(10,761)
Total operating lease liabilities	€ 40,735	€ 45,267

Related party transactions	12 Months Ended
Related party transactions	Dec. 31, 2023
Related Party Transactions [Abstract]
Related party transactions	Related party transactions Relationships with Expedia We have commercial relationships with Expedia Group, Inc. and many of its affiliated brands, including Brand Expedia, Hotels.com, Orbitz, Travelocity, Hotwire, Wotif, Vrbo and ebookers. These are arrangements terminable at will upon fourteen to thirty days prior notice by either party and on customary commercial terms that enable Expedia Group’s brands to advertise on our platform, and we receive payment for users we refer to them. We also have an agreement with Expedia Partner Solutions, pursuant to which powers our platform with a template (Hotels.com for partners). Related party revenue from Expedia Group of €172.5 million, €173.3 million and €91.3 million for the years ended December 31, 2023, 2022 and 2021, respectively, primarily consists of click-through fees and other advertising services provided to Expedia Group and its subsidiaries. These amounts are recorded at contract value, which we believe is a reasonable reflection of the value of the services provided. Related party revenue represented 36%, 32% and 25% and of our total revenue for each of the years ended December 31, 2023, 2022 and 2021, respectively. The related party trade receivable balances with Expedia Group and its subsidiaries reflected in our consolidated balance sheets as of December 31, 2023 and 2022 were €19.1 million and €24.4 million. As further described in Note 11 - Stockholders' equity, a one-time extraordinary dividend totaling €184.4 million was distributed to Class A and Class B shareholders of record on November 3, 2023. Of the total amount, €110.6 million has been distributed to Expedia Group based on their share ownership on the date of record. Services agreement On May 1, 2013, we entered into an Assets Purchase Agreement, pursuant to which Expedia Group purchased certain computer hardware and software from us, and a Data Hosting Services Agreement, pursuant to which Expedia Group provides us with certain data hosting services relating to all of the servers we use that are located within the United States. Either party may terminate the Data Hosting Services Agreement upon 30 days prior written notice. During the years ended December 31, 2023, 2022 and 2021, we did not utilize this service agreement. Services and support agreements On September 1, 2016, we entered into a Services and Support Agreement, pursuant to which Expedia Group agreed to provide us with certain services in connection with localizing content on our websites, such as translation services. This agreement was terminated on October 31, 2023 and a new agreement was effective as of November 1, 2023 with Expedia Group International Holdings III, LLC, (“EGIH3”). EGIH3 agreed to provide us with certain services in connection with localizing content on our websites, such as translation services. Either party may terminate the Services and Support Agreement upon 30 days prior notice. Effective January 1, 2023, we entered into a Management Services Agreement with Expedia, Inc., pursuant to which Expedia, Inc. agreed to provide us with certain services in connection with tax, accounting, finance, legal, operations, administrative and similarly related functions. Either party may terminate the Management Services Agreement upon 30 days prior notice. For the years ended December 31, 2023, 2022 and 2021, our operating expenses include €0.2 million each period of related party shared services fees and amounts related to the services and support agreements detailed above. UBIO Limited On November 28, 2022, we entered into a commercial agreement with UBIO Limited, an equity method investment (see Note 3 - Acquisitions and other investments), to increase the number of directly bookable rates available on our website for an initial term of 12 months. This agreement was terminated in the last quarter of 2023 by providing a 90 days written notice ahead of the contract renewal date. Effective January 11, 2024, we entered into a new commercial agreement with UBIO Limited. See Note 17 - Subsequent events for further details. For the years ended December 31, 2023 and 2022, our operating expenses include €1.5 million and €0.5 million related to the original commercial agreement. Transactions with shareholders In November 2022, we purchased 20,000,000 Class A shares from Peter Vinnemeier, one of our founders, for €19.3 million (USD 1.00 per share). The purchase of shares was funded from available working capital. See Note 11 - Stockholders' equity for further details. Following this share purchase, transactions with Mr. Vinnemeier are no longer related party transactions. As further described in Note 11 - Stockholders' equity, a one-time extraordinary dividend totaling €184.4 million was distributed to Class A and Class B shareholders of record on November 3, 2023. Of the total amount, €15.1 million has been distributed to Rolf Schrömgens, one of our founders and a member of our supervisory board, based on his share ownership on the date of record.

- Definition

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480990/946-20-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480990/946-20-50-5

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480990/946-20-50-6

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481062/946-235-50-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481062/946-235-50-2

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483326/850-10-50-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(g)(3))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(c))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(e))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org//850/tableOfContent

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483326/850-10-50-6

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483326/850-10-50-1

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483326/850-10-50-1

+ Details

Consolidated statements of operations - EUR (€)
€ in Thousands

12 Months Ended

Dec. 31, 2023

Dec. 31, 2022

Dec. 31, 2021

Revenue

€ 485,031

€ 535,004

€ 361,465

Costs and expenses:

Cost of revenue, including related party, excluding amortization

^[1]

11,971

12,691

11,500

Selling and marketing, including related party

^[1],[2],[3]

345,639

342,024

249,196

Technology and content, including related party

^[1],[2],[3]

49,020

54,921

52,374

General and administrative, including related party

^[1],[2],[3]

38,726

60,852

38,208

Amortization of intangible assets

^[2]

135

136

Goodwill and intangible assets impairment loss

196,127

184,642

Operating income/(loss)

(156,587)

(120,262)

10,051

Other income/(expense)

Interest expense

(12)

(51)

(389)

Interest income

5,213

622

174

Other, net

(478)

(556)

13,454

Total other income/(expense), net

4,723

13,239

Income/(loss) before income taxes

(151,864)

(120,247)

23,290

Expense for income taxes

12,391

6,570

12,586

Income/(loss) before equity method investment

(164,255)

(126,817)

10,704

Loss from equity method investment

(221)

(401)

Net income/(loss)

€ (164,476)

€ (127,218)

€ 10,704

Earnings per share attributable to common stockholders:

Basic (in Euro per share)

€ (0.48)

€ (0.36)

€ 0.03

Diluted (in Euro per share)

€ (0.48)

€ (0.36)

€ 0.03

Shares used in computing earnings per share:

Basic (in shares)

344,937,000

357,551,000

357,525,000

Diluted (in shares)

344,937,000

357,551,000

367,240,000

Nonrelated Party

Revenue

€ 312,559

€ 361,697

€ 270,110

Related Party

Revenue

€ 172,472

€ 173,307

€ 91,355

[1]


	Year ended December 31,
	2023		2022		2021
(1) Includes share-based compensation as follows:
Cost of revenue	€	146	€	198	€	257
Selling and marketing	463		737		1,104
Technology and content	1,728		2,969		3,897
General and administrative	7,168		11,438		12,003

[2]


(2) Includes amortization as follows:
Amortization of internal use software costs included in selling and marketing	€	—	€	8	€	98
Amortization of internal use software and website development costs included in technology and content	3,085		4,019		4,566
Amortization of internal use software costs included in general and administrative	—		104		313
Amortization of acquired technology included in amortization of intangible assets	135		136		136

[3]


(3) Includes related party expense as follows:

Selling and marketing	€	94	€	97	€	111
Technology and content	1,618		541		48
General and administrative	63		1		—

Cover	12 Months Ended
Cover	Dec. 31, 2023 shares
Document Information [Line Items]
Document Type	20-F
Document Registration Statement	false
Document Annual Report	true
Document Period End Date	Dec. 31, 2023
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Document Shell Company Report	false
Entity File Number	001-37959
Entity Registrant Name	trivago N.V.
Entity Incorporation, State or Country Code	P7
Entity Address, Address Line One	Kesselstraße 5 - 7
Entity Address, Postal Zip Code	40221
Entity Address, City or Town	Düsseldorf
Entity Address, Country	DE
Title of 12(b) Security	American Depositary Shares (ADSs), each representing five Class A shares, nominal value €0.06 per share
Trading Symbol	TRVG
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Document Accounting Standard	U.S. GAAP
Entity Shell Company	false
Entity Central Index Key	0001683825
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Amendment Flag	false
Class A common stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding	110,919,270
Class B common stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding	237,476,895
Business contact
Document Information [Line Items]
Entity Address, Address Line One	Kesselstraße 5 - 7
Entity Address, Postal Zip Code	40221
Entity Address, City or Town	Düsseldorf
Entity Address, Country	DE
Contact Personnel Name	Johannes Thomas
Country Region	+49
City Area Code	211
Local Phone Number	3876840000

Segment information (Tables)

12 Months Ended

Dec. 31, 2023

Segment Reporting [Abstract]

Schedule of segment reporting information, by segment

The following tables present our segment information for the years ended December 31, 2023, 2022 and 2021. As a significant portion of our property and equipment is not allocated to our operating segments and depreciation is not included in our segment measure, we do not report the assets by segment as it would not be meaningful. We do not regularly provide such information to our chief operating decision makers.


	Year Ended December 31, 2023
(€ thousands)	Developed Europe		Americas		Rest of World		Corporate & Eliminations		Total
Referral revenue	€	215,687	€	176,404	€	84,749	€	—	€	476,840
Subscription revenue	—		—		—		2,571		2,571
Other revenue	—		—		—		5,620		5,620
Total revenue	€	215,687	€	176,404	€	84,749	€	8,191	€	485,031
Advertising spend	147,713		118,965		56,469		—		323,147
ROAS contribution	€	67,974	€	57,439	€	28,280	€	8,191	€	161,884
Costs and expenses:
Cost of revenue, including related party, excluding amortization									11,971
Other selling and marketing, including related party (1)									22,492
Technology and content, including related party									49,020
General and administrative, including related party									38,726
Amortization of intangible assets									135
Impairment of intangible assets and goodwill									196,127
Operating loss									€	(156,587)
Other income/(expense)
Interest expense									(12)
Interest income									5,213
Other, net									(478)
Total other income/(expense), net									€	4,723
Loss before income taxes									€	(151,864)
Expense for income taxes									12,391
Loss before equity method investment									€	(164,255)
Loss from equity method investment									(221)
Net loss									€	(164,476)

(1) Represents all other sales and marketing, excluding Advertising Spend, as Advertising Spend is tracked by reporting segment.


	Year Ended December 31, 2022
(€ thousands)	Developed Europe		Americas		Rest of World		Corporate & Eliminations		Total
Referral revenue	€	237,692	€	216,406	€	67,692	€	—	€	521,790
Subscription revenue	—		—		—		3,398		3,398
Other revenue	—		—		—		9,816		9,816
Total revenue	€	237,692	€	216,406	€	67,692	€	13,214	€	535,004
Advertising spend	149,823		131,638		35,862		—		317,323
ROAS contribution	€	87,869	€	84,768	€	31,830	€	13,214	€	217,681
Costs and expenses:
Cost of revenue, including related party, excluding amortization									12,691
Other selling and marketing, including related party (1)									24,701
Technology and content, including related party									54,921
General and administrative, including related party									60,852
Amortization of intangible assets									136
Impairment of intangible assets and goodwill									184,642
Operating loss									€	(120,262)
Other income/(expense)
Interest expense									(51)
Interest income									622
Other, net									(556)
Total other income/(expense), net									€	15
Loss before income taxes									€	(120,247)
Expense for income taxes									6,570
Loss before equity method investment									€	(126,817)
Loss from equity method investment									(401)
Net loss									€	(127,218)

(1) Represents all other sales and marketing, excluding Advertising Spend, as Advertising Spend is tracked by reporting segment.


	Year Ended December 31, 2021
(€ thousands)	Developed Europe		Americas		Rest of World		Corporate & Eliminations		Total
Referral revenue	€	163,700	€	140,143	€	45,599	€	—	€	349,442
Subscription revenue	—		—		—		3,914		3,914
Other revenue	—		—		—		8,109		8,109
Total revenue	€	163,700	€	140,143	€	45,599	€	12,023	€	361,465
Advertising spend	106,984		94,096		22,470		—		223,550
ROAS contribution	€	56,716	€	46,047	€	23,129	€	12,023	€	137,915
Costs and expenses:
Cost of revenue, including related party, excluding amortization									11,500
Other selling and marketing, including related party (1)									25,646
Technology and content, including related party									52,374
General and administrative, including related party									38,208
Amortization of intangible assets									136

Operating income									€	10,051
Other income/(expense)
Interest expense									(389)

Interest income									174
Other, net									13,454
Total other income/(expense), net									€	13,239
Income before income taxes									€	23,290
Expense for income taxes									12,586


Net income									€	10,704

(1) Represents all other sales and marketing, excluding Advertising Spend, as Advertising Spend is tracked by reporting segment.

Schedule of revenue from external customers and long-lived assets, by geographical areas


	Year ended December 31,
(in thousands)	2023		2022		2021
Total revenues
United States	€	106,032	€	139,885	€	102,687
Germany	45,209		52,789		42,301
United Kingdom	55,867		68,554		41,389
Canada	29,240		31,899		11,862

Japan	39,016		19,200		5,999
All other countries	209,667		222,677		157,227
	€	485,031	€	535,004	€	361,465

The following table presents property and equipment, net for Germany and all other countries, as of December 31, 2023 and 2022:


(€ thousands)	Years ended December 31,
	2023		2022
Property and equipment, net:
Germany	€	10,040	€	13,012
All other countries	39		63
	€	10,079	€	13,075

Fair value measurement

12 Months Ended

Dec. 31, 2023

Fair Value Disclosures [Abstract]

Fair value measurement

Financial assets measured at fair value on a recurring basis are classified using the fair value hierarchy in the table below:


As of December 31, 2023	Total		Level 2
(in thousands)
Assets
Cash equivalents:

Term deposits	€	64,123	€	64,123
Short-term investments
Term deposits	25,225		25,225
Investments and other assets:
Term deposits	1,351		1,351
Total	€	90,699	€	90,699


As of December 31, 2022	Total		Level 2
(in thousands)
Assets
Cash equivalents:
Term deposits	€	159,000	€	159,000
Short-term investments
Term deposits	45,000		45,000
Investments and other assets:
Term deposits	1,351		1,351
Total	€	205,351	€	205,351

We value our financial assets using quoted market prices or alternative pricing sources and models utilizing market observable inputs.

We hold term deposit investments with financial institutions. We classify our term deposits within Level 2 in the fair value hierarchy because they are valued at amortized cost, which approximates fair value. Term deposits with a maturity of less than three months are classified as cash equivalents, those with a maturity of more than three months but less than one year are classified as short-term investments and those with a maturity of more than one year are classified as investments and other assets.

Investments in term deposits with a maturity of more than one year are restricted by long-term obligations related to the campus building.

Assets measured at fair value on a non-recurring basis

Our non-financial assets, such as goodwill, intangible assets and investments accounted under the equity method are adjusted to fair value when an impairment charge is recognized or the underlying investment is sold. Such fair value measurements are based predominately on Level 3 inputs.

Goodwill and intangible assets

For the years ended December 31, 2023 and 2022, we recorded goodwill impairments of €181.9 million and €104.6 million, respectively, and indefinite-lived intangible asset impairments of €14.2 million and €80.0 million, respectively.

Goodwill is assigned to our three reporting units on the basis of their relative fair values. The fair value of each reporting unit was estimated using a blended analysis of the present value of future discounted cash flows and market valuation approach using Level 3 inputs. We base our measurement of the fair value of our indefinite-lived intangible assets, which consist of trade name, trademarks, and domain names using the relief-from royalty method. This method uses Level 3 inputs including projected revenues, discount rate and a royalty savings rate which ranged from 3% to 4%. See Note 8 - Goodwill and intangible assets, net.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Leases - Supplemental information, operating leases (Details) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Cash paid for amounts included in the measurement of operating lease liabilities	€ 3,722	€ 3,828

Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Schedule of Cash and Cash Equivalents

The following table reconciles cash, cash equivalents and restricted cash reported in our consolidated balance sheets to the total amount presented in our consolidated statements of cash flows:


	As of December 31,
(in thousands)	2023		2022
Cash & cash equivalents	€	101,847	€	248,584
Restricted cash included within current assets	342		342

Total	€	102,189	€	248,926

Restrictions on Cash and Cash Equivalents

The following table reconciles cash, cash equivalents and restricted cash reported in our consolidated balance sheets to the total amount presented in our consolidated statements of cash flows:


	As of December 31,
(in thousands)	2023		2022
Cash & cash equivalents	€	101,847	€	248,584
Restricted cash included within current assets	342		342

Total	€	102,189	€	248,926

Schedule Of Foreign Currency Transaction Gains and (Losses)

Foreign currency transaction gains and losses presented within other income and expense, other, net for the years ended December 31, 2023, 2022 and 2021 were as follows:


	As of December 31,
(in thousands)	2023		2022		2021
Foreign exchange gains/(losses), net	€	(632)	€	(228)	€	1,554

Consolidated balance sheets (Parenthetical) - EUR (€) € in Thousands	Dec. 31, 2023	Dec. 31, 2022
Allowance for credit losses	€ 936	€ 418
Class common stock, shares issued (in shares)	110,919,270	124,305,225
Treasury stock (in shares)	0	20,000,000
Class A common stock
Class common stock, par value (in EUR per share)	€ 0.06	€ 0.06
Class common stock, shared authorized (in shares)	700,000,000	700,000,000
Common stock, shares outstanding (in shares)	110,919,270	104,305,225
Class B common stock
Class common stock, par value (in EUR per share)	€ 0.60	€ 0.60
Class common stock, shared authorized (in shares)	320,000,000	320,000,000
Class common stock, shares issued (in shares)	237,476,895	237,476,895
Common stock, shares outstanding (in shares)	237,476,895	237,476,895

Acquisitions and other investments	12 Months Ended
Acquisitions and other investments	Dec. 31, 2023
Business Combination and Asset Acquisition [Abstract]
Acquisitions and other investments	Acquisitions and other investments Acquisitions Effective January 12, 2021, we acquired 100% of weekengo GmbH ("Weekengo") shares for €6.7 million from former shareholders and the domain and related trademark for €0.7 million from a former shareholder, for an aggregate cash purchase price of €7.4 million. Weekengo is a company based in Germany that operates the online travel search website “weekend.com”, which specializes in optimizing the delivery of search results for direct flights and hotel packages with a short-trip focus. In the fourth quarter of 2021, we recorded a measurement period adjustment to the provisional amount recognized of deferred income taxes to reflect information that became known to management regarding facts and circumstances that existed as of the acquisition date. The adjustment resulted in an increase in deferred tax assets of €1.5 million, attributable to tax losses carried forward, which was offset by €0.3 million of deferred tax liabilities attributable to fair value adjustment on capitalized software and software development costs. The €1.2 million net increase in deferred tax assets resulted in a corresponding decrease to goodwill. The adjustment did not result in an impact to our consolidated statements of operations. As of December 31, 2021, our purchase price allocation was complete. Revenues from Weekengo included in the Company's consolidated statements of operations for the year ended December 31, 2021 were €0.2 million. Net loss from Weekengo included in the Company's consolidated statements of operations for the same period was €2.3 million. The Company did not incur material transaction costs with respect to the Weekengo acquisition during the year ended December 31, 2021. The Weekend product was discontinued during 2022 following a strategic shift in focus. As a result of the discontinuation, we recognized expenses of €0.5 million for costs related to software contracts that service the WEEKEND.com domain within operating expenses in our consolidated statements of operations for the year ended December 31, 2022. Other investments On April 28, 2022 (the "closing date"), we entered into an investment for a 20.8% (15.5% fully-diluted by share options) ownership interest in UBIO Limited ("UBIO") for €5.9 million. UBIO is a software company that develops robotic automation technology. trivago has the ability to exercise significant influence over UBIO through our representation on UBIO's Board of Directors, where we hold one of five seats. trivago does not have any rights, obligations or any relationships with regards to the other investors of UBIO. Our investment in UBIO is accounted for as an equity method investment. As of the closing date, the carrying value of our equity method investment in UBIO was approximately €5.8 million higher than our share of interest in UBIO's underlying net assets. Of this basis difference, €2.2 million relates to intangible assets that will be amortized over the intangible assets' useful life, €(0.4) million relates to tax basis differences to be recovered where appropriate and the remaining amount of €4.0 million relates to equity method goodwill recognized as part of the overall investment account balance. The equity method goodwill recognized is not amortized. Refer to Note 14 - Related party transactions for related party considerations arising from UBIO.

Significant accounting policies (Policies)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Basis of presentation

Unless otherwise specified, “the Company” refers to trivago N.V. and its respective subsidiaries throughout the remainder of these notes.

These consolidated financial statements reflect Expedia Group’s basis of accounting due to the change in control in 2013 when Expedia Group acquired a controlling ownership in trivago, as we elected the option to apply pushdown accounting in the period in which the change in control event occurred.

Certain amounts previously reported in the consolidated financial statements have been reclassified in the accompanying consolidated financial statements to conform to the current period's presentation, primarily to separately present interest income, which was previously classified as other net income on the statements of operations.

Seasonality/ Revenue recognition

Seasonality

We experience seasonal fluctuations in the demand for our services as a result of seasonal patterns in travel. For example, searches and consequently our revenue are generally the highest in the first three quarters as travelers plan and book their spring, summer and winter holiday travel. Our revenue typically decreases in the fourth quarter. We generally expect to experience higher return on advertising spend in the first and fourth quarter of the year as we typically expect to advertise less in the periods outside of high travel seasons. Seasonal fluctuations affecting our revenue also affect the timing of our cash flows. We typically invoice once per month, with customary payment terms. Therefore, our cash flow varies seasonally with a slight delay to our revenue, and is significantly affected by the timing of our advertising spending. Changes in the relative revenue share of our offerings in countries and areas where seasonal travel patterns vary from those described above may influence the typical trend of our seasonal patterns in the future.

Revenue recognition

Referral Revenue

We earn Referral Revenue using cost-per-click ("CPC") and cost-per-acquisition ("CPA") models. Both relate to fees earned on the display of a customer's (advertiser's) link on the trivago website.

Most of our revenue is invoiced on a monthly basis after the performance obligation has been satisfied with payment terms between 10 to 30 days. For some advertisers we require prepayments.

Subscription Revenue

Other Revenue

Deferred revenue

Consolidation

accounting is used for investments in associated companies in which we have a financial interest but do not have control over.

As of December 31, 2023 and December 31, 2022, there are no noncontrolling interest balances, as all subsidiaries of the Company are wholly-owned.

Accounting estimates

Cost of revenue

Cash, cash equivalents and restricted cash

Our cash and cash equivalents include cash and liquid financial instruments, consisting of time deposit investments, with original maturities of three months or less when purchased.

The following table reconciles cash, cash equivalents and restricted cash reported in our consolidated balance sheets to the total amount presented in our consolidated statements of cash flows:


	As of December 31,
(in thousands)	2023		2022
Cash & cash equivalents	€	101,847	€	248,584
Restricted cash included within current assets	342		342

Total	€	102,189	€	248,926

Accounts receivable

Investments

Non-marketable equity investments

Property and equipment, net including software and website capitalization

Leases

We have lease agreements with insignificant non-lease components and have elected the practical expedient to combine and account for lease and non-lease components as a single lease component.

Additionally, we have entered into subleases for unoccupied leased office space. We recognize sublease payments on a straight-line basis over the term of the sublease.

Business combinations

Recoverability of goodwill and indefinite-lived intangible assets

revenue and operating income multiples and the control premium applied in estimating the fair value of the reporting unit.

Recoverability of intangible assets with definite lives and other long-lived assets

Income taxes

Presentation of taxes in the statements of operations

We present taxes that we collect from advertisers and remit to government authorities on a net basis in our consolidated statements of operations.

Interest income

Foreign currency translation and transaction gains and losses

Foreign currency transaction gains and losses presented within other income and expense, other, net for the years ended December 31, 2023, 2022 and 2021 were as follows:


	As of December 31,
(in thousands)	2023		2022		2021
Foreign exchange gains/(losses), net	€	(632)	€	(228)	€	1,554

Advertising expense

Share-based compensation

We amortize the fair value of service-based awards, net of actual forfeitures, as share-based compensation expense over the vesting term on a straight-line basis.

Performance and Market-Based Awards.

Reserves available for dividend distribution

For the years ended December 31, 2023 and 2022, our reserves restricted for dividend distribution were €154.6 million and €155.2 million, respectively.

Fair value recognition, measurement and disclosure

We disclose the fair value of our financial instruments based on the fair value hierarchy using the following three categories:

Level 1 - Valuations based on quoted prices for identical assets and liabilities in active markets.

Certain risks and concentration of credit risk

Contingent liabilities

Government grants

Government Grants

Treasury stock

Adoption of new accounting pronouncements and Recent accounting policies not yet adopted

Adoption of new accounting pronouncements

Recent accounting pronouncements not yet adopted

Stockholders' equity (Details) € / shares in Units, € in Thousands		1 Months Ended	3 Months Ended	12 Months Ended
	Nov. 03, 2023 EUR (€)	Nov. 30, 2022 EUR (€) shares	May 30, 2022 shares	Dec. 31, 2023 EUR (€) vote_per_share € / shares shares	Dec. 31, 2022 € / shares shares	Dec. 31, 2021 shares	Nov. 17, 2023	Oct. 31, 2023	Mar. 01, 2022 shares
Class of Stock [Line Items]
Common stock, conversion (in shares)				1
Share conversion ratio							5	1	1
Dividend paid to shareholders \| €	€ 184,400			€ 184,381
Treasury stock (in shares)				0	20,000,000
Treasury stock acquired (in shares)			0
Treasury stock retired at lower than repurchase price \| €		€ 18,700
Rolf Schrömgens \| Trivago N.V.
Class of Stock [Line Items]
Ownership interest, noncontrolling owners, percentage					8.20%
Voting interest, noncontrolling owners, percentage					11.50%
Messrs. Schrömgens, Vinnemeier and Siewert \| Trivago N.V.
Class of Stock [Line Items]
Ownership interest, noncontrolling owners, percentage						8.30%
Voting interest, noncontrolling owners, percentage						11.50%
Class A common stock
Class of Stock [Line Items]
Common stock, shares outstanding (in shares)				110,919,270	104,305,225
Class common stock, par value (in EUR per share) \| € / shares				€ 0.06	€ 0.06
Votes per share \| vote_per_share				1
Dividends paid (in dollars per share) \| € / shares				€ 0.529228
Treasury stock acquired (in shares)					205,457
Treasury stock, retired, amount \| €		1,200
Class A common stock \| Peter Vinnemeier
Class of Stock [Line Items]
Treasury stock acquired, including foreign exchange gain, amount \| €		€ 19,900
Class A common stock \| Peter Vinnemeier \| Related Party
Class of Stock [Line Items]
Treasury stock acquired (in shares)		20,000,000
Class B common stock
Class of Stock [Line Items]
Common stock, shares outstanding (in shares)				237,476,895	237,476,895
Class common stock, par value (in EUR per share) \| € / shares				€ 0.60	€ 0.60
Votes per share \| vote_per_share				10
Shares converted (in shares)				0	24,485,793	36,225,279
Dividends paid (in dollars per share) \| € / shares				€ 0.529228
American Depositary Shares
Class of Stock [Line Items]
Shares authorized to be repurchased (in shares)									10,000,000

Share-based awards and other equity instruments - RSUs activity (Details) - € / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Weighted Average Grant Date Fair Value
Shares withheld for tax withholding obligation	6,407,312
RSUs
RSUs
Beginning balance (in shares)	2,972,024
Granted (in shares)	1,446,392
Vested (in shares)	1,092,205
Cancelled (in shares)	1,123,436
Ending balance (in shares)	2,202,775	2,972,024
Weighted Average Grant Date Fair Value
Beginning balance (in EUR per share)	€ 1.94
Granted (in EUR per share)	1.57
Vested (in EUR per share)	1.85
Cancelled (in EUR per share)	1.69
Ending balance (in EUR per share)	€ 1.79	€ 1.94
Remaining contractual life	6 years	6 years
Shares withheld for tax withholding obligation	310,268

Fair value measurement - Narrative (Details) € in Thousands	12 Months Ended		24 Months Ended
Fair value measurement - Narrative (Details) € in Thousands	Dec. 31, 2023 EUR (€) reporting_unit	Dec. 31, 2022 EUR (€)	Dec. 31, 2023 EUR (€)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of goodwill	€ 181,927	€ 104,642
Impairment of indefinite-lived intangible assets	€ 14,200	€ 80,000	€ 94,200
Number of reporting units \| reporting_unit	3
Measurement Input, Royalty Savings Rate \| Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Royalty savings rate, percentage	0.03		0.03
Measurement Input, Royalty Savings Rate \| Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Royalty savings rate, percentage	0.04		0.04

Fair value measurement (Tables)

12 Months Ended

Dec. 31, 2023

Fair Value Disclosures [Abstract]

Schedule of fair value, assets and liabilities measured on recurring basis

Financial assets measured at fair value on a recurring basis are classified using the fair value hierarchy in the table below:


As of December 31, 2023	Total		Level 2
(in thousands)
Assets
Cash equivalents:

Term deposits	€	64,123	€	64,123
Short-term investments
Term deposits	25,225		25,225
Investments and other assets:
Term deposits	1,351		1,351
Total	€	90,699	€	90,699


As of December 31, 2022	Total		Level 2
(in thousands)
Assets
Cash equivalents:
Term deposits	€	159,000	€	159,000
Short-term investments
Term deposits	45,000		45,000
Investments and other assets:
Term deposits	1,351		1,351
Total	€	205,351	€	205,351

Stockholders' equity	12 Months Ended
Stockholders' equity	Dec. 31, 2023
Equity [Abstract]
Stockholders' equity	Stockholders' equity Class A and Class B Common Stock As of December 31, 2023, we had 110,919,270 Class A shares and 237,476,895 Class B shares outstanding. Class A and Class B common stock has a par value of €0.06 and €0.60, respectively. Class B shares are entitled to ten votes per share, and holders of our Class A shares are entitled to one vote per share. All other terms and preferences of Class A and Class B common stock are the same. Each Class B share is convertible into one Class A share at any time by the holder. During the years ended December 31, 2023, 2022 and 2021, nil, 24,485,793 and 36,225,279 Class B shares were converted into Class A shares, respectively. As of December 31, 2023, Class B shares of trivago N.V. are only held by Expedia Group and Rolf Schrömgens, one of our founders and a member of our supervisory board. Refer to Note 1 - Organization and basis of presentation for Expedia Group's ownership interest and voting interest. The Class B shares held by Mr. Schrömgens as of December 31, 2023 had an ownership interest and voting interest of 8.2% and 11.5%, respectively, and 8.3% and 11.5%, respectively, as of December 31, 2022. In October 2023, the management board approved a change in the ratio of the Company's ADS program, comprising a change in the ratio of ADSs to Class A shares ("shares") from one ADS representing one share, to one ADS representing five shares. The ratio change was effective as of November 17, 2023. Dividend In 2023, the Company paid a one-time extraordinary dividend totaling €184.4 million (€0.529228 per each Class A and B share) to shareholders of record on November 3, 2023. The dividend was paid to holders of Class A and B shares on November 6, 2023 and was distributed to holders of our ADSs on November 13, 2023. Treasury Stock As of December 31, 2023 and December 31, 2022, nil and 20,000,000, respectively, of our issued shares were treasury shares. In November 2022, the Company acquired 20,000,000 Class A shares from Peter Vinnemeier valued at €19.9 million which were classified as treasury stock until they were retired in September 2023. As a result, the treasury stock balance of €19.9 million was eliminated and Class A common stock was reduced by €1.2 million representing the par value of the retired shares. The difference of €18.7 million was recognized in accumulated deficit. On March 1, 2022, the Company's Supervisory Board authorized a program to repurchase up to 10 million of the Company's ADSs, each representing one Class A share. On March 7, 2022, the Company entered into a stock repurchase program which expired on May 30, 2022. No stock repurchases were made under this program. On May 31, 2022, the Company entered into another stock repurchase program which expired on July 29, 2022. As of December 31, 2022, the Company reacquired 205,457 Class A common shares on the open market at fair market value. The shares of stock purchased under the buyback program were held as treasury shares until they were all reissued to settle RSU awards vesting from our share-based compensation awards during the fourth quarter of 2022. Reserves Reserves primarily represents the effects of pushdown accounting applied due to the change in control in 2013 in addition to share premium as result of the corporate reorganization and IPO. See Note 1 - Organization and basis of presentation. Further effects to the Reserves are due to dividends paid to shareholders, taxes withheld on net share settlements of equity awards, share-based compensation expense, impact of reclassification of share-based compensation expense from equity to liability, exercises of employee stock options and vesting of RSUs, the effect of the conversions of Class B shares to Class A shares, and the reissuance of treasury stock. Accumulated other comprehensive income/(loss) Accumulated other comprehensive income/(loss) represents foreign currency translation adjustments for our subsidiaries in foreign locations. As of December 31, 2023 we do not expect to reclassify any amounts included in accumulated other comprehensive income/(loss) into earnings during the next 12 months. Contribution from Parent The beginning contribution from Parent balance represents the pushdown of share-based compensation expense from Expedia Group.

- Definition

The entire disclosure for equity.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
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-Paragraph 13
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
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-Paragraph 1
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Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
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-URI https://asc.fasb.org//505/tableOfContent

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
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-Paragraph 13
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Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
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Reference 15: http://www.xbrl.org/2003/role/disclosureRef
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Reference 16: http://www.xbrl.org/2003/role/disclosureRef
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Reference 17: http://www.xbrl.org/2003/role/disclosureRef
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Reference 18: http://www.xbrl.org/2003/role/disclosureRef
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Reference 19: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Prepaid expenses and other current assets - Summary of prepaid expenses and other current assets (Details) - EUR (€) € in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid advertising	€ 6,429	€ 6,284
Other prepaid expenses	4,393	2,035
Other assets	210	350
Total	€ 11,032	€ 8,669

Property and equipment, net (Details) - EUR (€) € in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Less: accumulated depreciation	€ 42,477	€ 42,175
Property and equipment, net	10,079	13,075
Depreciable Property, Plant And Equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	52,556	54,693
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	4,117	6,865
Capitalized software and software development costs
Property, Plant and Equipment [Line Items]
Property and equipment, gross	30,065	28,867
Computer equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	15,375	15,916
Property and equipment, net	800	1,300
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	2,999	3,045
Construction in process
Property, Plant and Equipment [Line Items]
Property and equipment, gross	€ 0	€ 557

Prepaid expenses and other current assets (Tables)

12 Months Ended

Dec. 31, 2023

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Summary of prepaid expenses and other current assets


	As of December 31,
(in thousands)	2023		2022
Prepaid advertising	€	6,429	€	6,284
Other prepaid expenses	4,393		2,035
Other assets	210		350
Total	€	11,032	€	8,669

Significant accounting policies - Narrative (Details)
€ in Thousands

12 Months Ended

Dec. 31, 2023

EUR (€)

reporting_unit

segment

Dec. 31, 2022

EUR (€)

Dec. 31, 2021

EUR (€)

Significant Accounting Policies [Line Items]

Deferred revenue

€ 1,176

€ 1,689

€ 2,200

Revenue recognized that was included in beginning deferred revenue balance

1,700

2,100

Amortization of intangible assets

^[1]

€ 135

136

Number of reporting units | reporting_unit

Number of operating segments | segment

Reserves restricted for dividend distribution

€ 154,600

155,200

Grant received from German government

€ (478)

€ (556)

13,454

Grant

Significant Accounting Policies [Line Items]

Grant received from German government

€ 12,000

Customer Concentration Risk | Expedia | Revenue

Significant Accounting Policies [Line Items]

Concentration risk, percentage

36.00%

32.00%

25.00%

Customer Concentration Risk | Expedia | Accounts Receivable

Significant Accounting Policies [Line Items]

Concentration risk, percentage

45.00%

49.00%

Customer Concentration Risk | Booking Holdings | Revenue

Significant Accounting Policies [Line Items]

Concentration risk, percentage

43.00%

49.00%

54.00%

Customer Concentration Risk | Booking Holdings | Accounts Receivable

Significant Accounting Policies [Line Items]

Concentration risk, percentage

25.00%

30.00%

Software Development Costs

Significant Accounting Policies [Line Items]

Property and equipment useful life (in years)

3 years

Software Enhancement Costs

Significant Accounting Policies [Line Items]

Property and equipment useful life (in years)

3 years

Acquired technology

Significant Accounting Policies [Line Items]

Amortization of intangible assets

€ 135

€ 136

Internal use software and website development costs

Significant Accounting Policies [Line Items]

Amortization of intangible assets

€ 3,100

€ 4,100

€ 5,000

Minimum

Significant Accounting Policies [Line Items]

Performance obligation payment terms

10 days

Accounts receivable due, number of days

10 days

Minimum | Stock Option

Significant Accounting Policies [Line Items]

Award vesting period (in years)

1 year

Minimum | RSUs

Significant Accounting Policies [Line Items]

Award vesting period (in years)

1 year

Minimum | Computer equipment, capitalized software and software development cost and furniture and other equipment

Significant Accounting Policies [Line Items]

Property and equipment useful life (in years)

3 years

Maximum

Significant Accounting Policies [Line Items]

Performance obligation payment terms

30 days

Accounts receivable due, number of days

30 days

Intangible asset, useful life (in years)

7 years

Maximum | Stock Option

Significant Accounting Policies [Line Items]

Award vesting period (in years)

3 years

Maximum | RSUs

Significant Accounting Policies [Line Items]

Award vesting period (in years)

3 years

Maximum | Computer equipment, capitalized software and software development cost and furniture and other equipment

Significant Accounting Policies [Line Items]

Property and equipment useful life (in years)

8 years

[1]


(2) Includes amortization as follows:
Amortization of internal use software costs included in selling and marketing	€	—	€	8	€	98
Amortization of internal use software and website development costs included in technology and content	3,085		4,019		4,566
Amortization of internal use software costs included in general and administrative	—		104		313
Amortization of acquired technology included in amortization of intangible assets	135		136		136

Property and equipment, net (Tables)

12 Months Ended

Dec. 31, 2023

Property, Plant and Equipment [Abstract]

Schedule of property and equipment, net


	As of December 31,
(in thousands)	2023		2022
Leasehold improvements	€	4,117	€	6,865
Capitalized software and software development costs	30,065		28,867
Computer equipment	15,375		15,916
Furniture and fixtures	2,999		3,045

Subtotal	52,556		54,693
Less: accumulated depreciation	42,477		42,175
Construction in process	—		557
Property and equipment, net	€	10,079	€	13,075

Prepaid expenses and other current assets - Narrative (Details) - EUR (€) € in Thousands	Dec. 31, 2023	Dec. 31, 2022
Business Acquisition [Line Items]
Prepaid advertising	€ 6,429	€ 6,284
Marketing Sponsorship Agreement
Business Acquisition [Line Items]
Prepaid advertising	€ 4,000

Organization and basis of presentation (Details) - Trivago N.V. - Expedia	Dec. 31, 2023	Dec. 31, 2022
Subsidiary, Sale of Stock [Line Items]
Ownership interest, parent, percentage	60.00%	61.20%
Voting interest, parent, percentage	84.10%	84.30%

Income taxes - Components of income tax expense/(benefit) (Details) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Current income tax expense:
Germany	€ 15,883	€ 26,239	€ 3,729
Other countries	9	65	1
Current income tax expense	15,892	26,304	3,730
Deferred income tax expense/(benefit):
Germany	(3,501)	(19,763)	8,914
Other countries	0	29	(58)
Deferred income tax expense/(benefit)	(3,501)	(19,734)	8,856
Income tax expense	€ 12,391	€ 6,570	€ 12,586

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References + Details

Segment information - Narrative (Details)	12 Months Ended
Segment information - Narrative (Details)	Dec. 31, 2023 segment
Segment Reporting [Abstract]
Number of reportable segments	3
Number of operating segments	3