In 2025, Deloitte was the largest accounting firm in the United States by audit and attest revenue. The firm had a U.S. revenue from this service of *** billion U.S. dollars. PwC followed, with revenue from audit and attest services amounting to *** billion U.S. dollars.
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AccountingToday. (February 26, 2026). Leading accounting firms in the United States in 2025, by revenue from audit and attest services (in million U.S. dollars) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved August 03, 2026, from /statistics/785028/accounting-firms-united-states-audit-attest-revenue/
AccountingToday. "Leading accounting firms in the United States in 2025, by revenue from audit and attest services (in million U.S. dollars)." Chart. February 26, 2026. ÌÇÐÄÆƽâ°æ. Accessed August 03, 2026. /statistics/785028/accounting-firms-united-states-audit-attest-revenue/
AccountingToday. (2026). Leading accounting firms in the United States in 2025, by revenue from audit and attest services (in million U.S. dollars). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: August 03, 2026. /statistics/785028/accounting-firms-united-states-audit-attest-revenue/
AccountingToday. "Leading Accounting Firms in The United States in 2025, by Revenue from Audit and Attest Services (in Million U.S. Dollars)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 26 Feb 2026, /statistics/785028/accounting-firms-united-states-audit-attest-revenue/
AccountingToday, Leading accounting firms in the United States in 2025, by revenue from audit and attest services (in million U.S. dollars) ÌÇÐÄÆƽâ°æ, /statistics/785028/accounting-firms-united-states-audit-attest-revenue/ (last visited August 03, 2026)
Leading accounting firms in the United States in 2025, by revenue from audit and attest services (in million U.S. dollars) [Graph], AccountingToday, February 26, 2026. [Online]. Available: /statistics/785028/accounting-firms-united-states-audit-attest-revenue/
