Big Four firm global revenue announcements for financial year 2026 are starting to roll out, with Deloitte out of the gate first.
The world’s top accounting firm by revenue had another record-breaking year as it reached $74.5 billion for the year ending May 31, a 3.8% increase in local currency terms and 5.7% increase in U.S. dollar terms from FY 2025.
Last year, Deloitte brought in $70.5 billion in revenue, with year-over-year growth of 4.8% in local currency terms and 4.9% in U.S. dollar terms.
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“In a time of rapid change and technology-fueled disruption, organizations around the world continue to place their trust in Deloitte to successfully navigate this historic reshaping of markets and industries,” Deloitte Global CEO Joe Ucuzoglu said in a statement on Sept. 24.
Among the regions Deloitte serves, Asia Pacific grew the fastest in local currency at 7.5%, followed by Europe, Middle East, and Africa (EMEA) at 3.5% and the Americas at 3.2%.
Deloitte didn’t release total revenue numbers for each region, just percentages of year-over-year revenue growth.
Tax and legal was the Deloitte service line with the largest growth in FY 2026 at 5.8% in local currency, followed by audit and assurance at 5%. The firm’s consulting arm had a bit of a down year: strategy, risk and transactions had year-over-year revenue growth of 4.4% in local currency, while technology and transformation revenue increased only 2.5%.
Deloitte didn’t publish total revenue numbers for each service line, only percentages of year-over-year revenue growth.
The firm says it’s “investing deeply” in its people, platforms, artificial intelligence alliances, and business models, which includes a $3 billion investment through 2030 to modernize delivery and operations across all Deloitte businesses and bring new products and offerings to market that enable end-to-end transformation.
“Anchored in Deloitte’s Trustworthy AI framework, our approach helps organizations harness AI responsibly as they enter new markets; adapt to evolving regulatory and business constraints; transform core operations; address complex accounting, auditing, and reporting matters; and reimagine their tax and legal functions,” the firm said in a media release.
Ucuzoglu added, “Deloitte is unlocking AI’s potential through a people-led, AI-powered approach that is grounded in trust, integrity, and professional excellence.”
Deloitte says it now employs more than 500,000 people globally, up from roughly 470,000 people last year.
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