Summary of Significant Accounting Policies	9 Months Ended
Summary of Significant Accounting Policies	Sep. 30, 2025
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	1. Summary of Significant Accounting Policies Basis of Presentation The accompanying unaudited condensed consolidated financial statements contained in this Quarterly Report on Form 10-Q are those of Wayfair Inc. and its wholly-owned subsidiaries. Unless the context indicates otherwise, “Wayfair,” “the Company" or similar terms refer to Wayfair Inc. and its subsidiaries. In the Company’s opinion, the accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States ("GAAP") and applicable rules and regulations of the United States (“U.S.”) Securities and Exchange Commission ("SEC") regarding interim financial reporting and reflect all adjustments, consisting of normal recurring adjustments, necessary for a fair statement of the results of the interim periods presented. Certain information and note disclosures normally included in the audited financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. The information included in this Quarterly Report on Form 10-Q should be read in conjunction with the audited consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2024. Furthermore, interim results are not necessarily indicative of the results for the full year ended December 31, 2025 or future periods. The Company has identified significant accounting policies that are critical to understanding its business and results of operations. Wayfair believes that there have been no significant changes during the three and nine months ended September 30, 2025 to the items disclosed in Note 1, Summary of Significant Accounting Policies, included in Part II, Item 8, Financial Statements and Supplementary Data, of the Company’s Annual Report on Form 10-K for the year ended December 31, 2024. Recently Issued Accounting Pronouncements In December 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, to update reportable income tax disclosure requirements, primarily through enhanced disclosures on the rate reconciliation table and other disclosures, including total income taxes paid by jurisdiction. The amendment is effective for annual periods beginning after December 15, 2024, with early adoption permitted. The amendment should be applied prospectively, with retrospective adoption permitted. Wayfair is currently evaluating the impact that the adoption of this standard will have on its 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, which requires disclosure of specific expense categories in the notes to the financial statements. The amendment is effective for annual periods beginning after December 15, 2026, with early adoption permitted. The amendment should be applied prospectively to financial statements issued for reporting periods after the effective date of this ASU or retrospectively to any or all prior periods presented in the financial statements. Wayfair is currently evaluating the impact that the adoption of this standard will have on its consolidated financial statements and related disclosures. In November 2024, the FASB issued ASU 2024-04, Debt - Debt with Conversion and Other Options (Subtopic 470-20): Induced Conversions of Convertible Debt Instruments, which clarifies the assessment of whether certain settlements of convertible debt instruments should be accounted for as an induced conversion. The amendment is effective for annual periods beginning after December 15, 2025, with early adoption permitted. The amendment can be applied either on a prospective or retrospective basis. Wayfair is currently evaluating the impact that the adoption of this standard will have on its consolidated financial statements and related disclosures. 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, which clarifies and modernizes the accounting for costs related to internal-use software, and clarifies the threshold entities apply to begin capitalizing costs. The amendment is effective for annual periods beginning after December 15, 2027, and interim periods within those fiscal years. The amendment can be applied on a fully prospective basis, a modified basis for in-process projects, or on a retrospective basis. Wayfair is currently evaluating the impact that the adoption of this standard will have on its consolidated financial statements and related disclosures.

Wayfair Inc. 10-Q