Deloitte reported total revenue figures of around billion U.S. dollars in 2025, the highest among the Big Four accounting firms. The company also led the rankings in the Americas, but it was PwC who came out on top in the EMEA region (Europe, the Middle East, and Africa).
Accounting around the world
Deloitte generated billion U.S. dollars in North and South America in 2025, which was more than half of their revenue worldwide. A similar story was reported by PwC, with almost half of their aggregated worldwide revenue in 2025 being made in the regions of the Asia Pacific and EMEA. PwC was the only firm that experienced a decline in revenue in the Asia Pacific region, compared to the previous year.
Who are the Big Four?
The four biggest accounting firms worldwide are Deloitte, PricewaterhouseCoopers (PwC), Ernst and Young (EY), and Klynveld Peat Marwick Goerdeler (KPMG). Known as the Big Four, the companies have a significant oligopoly in the accounting market and generated a combined revenue worldwide of over billion U.S. dollars and employed over million people globally in 2025. Until 1989, the market had been dominated by accounting firms – also known as audit firms or professional services networks – but the number has since halved due to mergers and the collapse of major American accounting firm Arthur Andersen.
We’re happy to help
Get in touch with us for additional information
Feel free to contact us anytime. We will respond to your inquiry as quickly as possible.