Summary of Significant Accounting Policies	6 Months Ended
Summary of Significant Accounting Policies	Jun. 30, 2026
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies Basis of Presentation The accompanying interim condensed consolidated financial statements are unaudited (the “Unaudited Condensed Consolidated Financial Statements”). The Unaudited Condensed Consolidated Financial Statements and related disclosures have been prepared in conformity with accounting principles generally accepted in the U.S. (“GAAP”). Any reference in these notes to applicable guidance is meant to refer to GAAP as found in the Accounting Standards Codification (“ASC”) and Accounting Standards Update (“ASU”) of the Financial Accounting Standards Board (“FASB”). The Unaudited Condensed Consolidated Financial Statements have also been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”). Accordingly, certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. The Unaudited Condensed Consolidated Financial Statements reflect all adjustments, consisting of only normal recurring adjustments, necessary for the fair presentation of the Company’s financial statements for interim periods. These interim period results are not necessarily indicative of the results to be expected for any other interim period or the full year. The Unaudited Condensed Consolidated Financial Statements should be read in conjunction with the Company’s audited consolidated financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025, filed with the SEC on February 19, 2026 (the “Annual Report”). The Company has presented the financial results of CarOffer as discontinued operations in the Unaudited Condensed Consolidated Financial Statements. No assets or liabilities were classified as discontinued operations as of June 30, 2026 or December 31, 2025. No results of operations were classified as discontinued operations for the three and six months ended June 30, 2026. The Unaudited Condensed Consolidated Income Statement for the three and six months ended June 30, 2025, was derived from the Unaudited Condensed Consolidated Income Statement of CarGurus, Inc. as of that date, adjusted for the reclassification of discontinued operations. The Unaudited Condensed Consolidated Statement of Comprehensive Income, Unaudited Condensed Consolidated Statement of Stockholders’ Equity, and the Unaudited Condensed Consolidated Statement of Cash Flows as of June 30, 2025, related to discontinued operations have not been separately reclassified and are included within each for the period referenced. Unless indicated otherwise, the information in these notes to the Unaudited Condensed Consolidated Financial Statements relates to the Company’s continuing operations and does not include the results of discontinued operations. For further information on discontinued operations, refer to Note 3 of the Unaudited Condensed Consolidated Financial Statements. Principles of Consolidation The Unaudited Condensed Consolidated Financial Statements include the accounts of the Company and its subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. Subsequent Event Considerations The Company considers events or transactions that occur after the balance sheet date but prior to the issuance of the Unaudited Condensed Consolidated Financial Statements to provide additional evidence for certain estimates or to identify matters that require additional disclosure. The Company has evaluated all subsequent events and determined that there are no material recognized or unrecognized subsequent events requiring disclosure, other than those described in Note 14 of the Unaudited Condensed Consolidated Financial Statements. Use of Estimates The preparation of the Unaudited Condensed Consolidated Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expense during the reporting period. Although the Company regularly assesses these estimates, actual results could differ materially from these estimates. The Company bases its estimates on historical experience and various other assumptions that it believes to be reasonable under the circumstances. Actual results may differ from management’s estimates if these results differ from historical experience, or other assumptions do not turn out to be substantially accurate, even if such assumptions are reasonable when made. Changes in estimates are recognized in the period in which they become known. Critical estimates relied upon in preparing the Unaudited Condensed Consolidated Financial Statements include the capitalization and useful lives of product, technology, and development costs for website development, internal-use software, and hosting arrangements. Accordingly, the Company considers this to be its critical accounting estimate, and believes that of the Company’s significant accounting policies, this involves the greatest degree of judgment and complexity. Concentration of Credit Risk The Company has no significant off-balance sheet risk, such as foreign exchange contracts, option contracts, or other foreign hedging arrangements. Financial instruments that potentially expose the Company to concentrations of credit risk consist primarily of cash and cash equivalents, and trade accounts receivable. The Company maintains its cash and cash equivalents, principally with accredited financial institutions of high credit standing. Although the Company deposits its cash and cash equivalents with multiple financial institutions, its deposits with each such financial institution exceed governmental insured limits. The Company routinely assesses the creditworthiness of its customers and does not require collateral. The Company generally has not experienced material losses related to receivables from individual customers or groups of customers as the losses were dispersed across a large number of customers. Due to this factor, no additional credit risk beyond amounts provided for collection losses was believed by management to be probable in the Company’s trade accounts receivable. As of June 30, 2026 and December 31, 2025, a payment processor for several hundred dealer accounts represented 10.9% and 10.8%, respectively, of net trade accounts receivable. The related trade accounts receivable balance included unbilled and billed receivables. The concentration was driven by the timing of payments pursuant to the agreement with the payment processor. The remainder of the trade accounts receivable was dispersed among more than 1,000 customers. Therefore, the Company does not believe there is significant credit risk with respect to trade accounts receivable. For the three months ended June 30, 2026 and 2025 and for the six months ended June 30, 2026 and 2025, no customer accounted for more than 10% of total revenue. As of June 30, 2026 and December 31, 2025, $15.2 million and $16.8 million, respectively, was included in accounts receivable, net representing unbilled accounts receivable relating primarily to both dealers and advertising customers invoiced in the period subsequent to services being rendered and revenue recognition adjustments for Company offered discounts given to dealers in accordance with ASC Topic 606, Revenue from Contracts with Customers (“ASC 606”). Significant Accounting Policies The Unaudited Condensed Consolidated Financial Statements reflect the application of certain significant accounting policies as described below and elsewhere in these notes to the Unaudited Condensed Consolidated Financial Statements. As of June 30, 2026, there have been no material changes in the Company’s significant accounting policies, which are detailed in the Annual Report. Recent Accounting Pronouncements Not Yet Adopted From time to time, new accounting pronouncements are issued by the FASB or other standard-setting bodies and adopted by the Company on or prior to the specified effective date. Unless otherwise disclosed below, the Company believes that the impact of recently issued standards that are not yet effective will not have a material impact on its financial position or results of operations upon adoption. As of June 30, 2026, there are no new accounting pronouncements that the Company is considering adopting, other than those described below. In September 2025 the FASB issued ASU 2025-06, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software (“ASU 2025-06”), which clarifies and modernizes the guidance to reflect the evolution of software development from a sequential to an agile development method. ASU 2025-06 removes all references to project development stages to reflect this change in software development and requires capitalization of software costs to begin when management has authorized and committed to funding the project and it is probable the project will be completed and used to perform the intended function. ASU 2025-06 does not change what internal-use software costs can be capitalized or when such capitalization ceases. ASU 2025-06 is effective for annual reporting periods beginning after December 15, 2027, and interim reporting periods within those annual reporting periods. Early adoption is permitted as of the beginning of an annual reporting period. ASU 2025-06 may be adopted either prospectively, using a modified transition approach, or retrospectively. The Company is currently evaluating the impact of ASU 2025-06 on its future consolidated financial statements and related disclosures. In November 2024 the FASB issued ASU 2024-03, Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses (“ASU 2024-03”). ASU 2024-03 is intended to provide more detailed expense information and requires additional disaggregated disclosures in the notes to the financial statements for categories of expenses that are included on the face of the income statement. ASU 2024-03 is effective for the fiscal years beginning after December 15, 2026, and interim periods within fiscal years beginning after December 15, 2027. Early adoption is permitted. ASU 2024-03 may be applied either prospectively to financial statements issued for periods after the effective date of ASU 2024-03 or retrospectively to all prior periods presented in the consolidated financial statements. The Company is currently evaluating the impact of ASU 2024-03 on its future consolidated financial statements and related disclosures.