The figures have been rounded.
Fiscal years: Deloitte ends on May 31; PwC and EY on June 30; and KPMG ends on September 30.
The "Big Four" firms are Deloitte, PwC, EY, and KPMG. These firms offer services such as auditing, assurance, corporate finance, and legal services, among others.
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Big Four global revenue in 2015 totaled approximately $118 billion.
This statistic shows the revenue volume of the Big Four worldwide in 2015. PwC generated approximately 35.36 billion U.S. dollars in revenue in 2015 and ranked as the top company in this classification.
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ÌÇÐÄÆƽâ°æ. (January 30, 2016). Annual revenue volume of the Big Four worldwide in 2015 (in billions of U.S. dollars) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 30, 2026, from /statistics/1656460/big-four-annual-revenue-volume-per-company-2015/
ÌÇÐÄÆƽâ°æ. "Annual revenue volume of the Big Four worldwide in 2015 (in billions of U.S. dollars)." Chart. January 30, 2016. ÌÇÐÄÆƽâ°æ. Accessed July 30, 2026. /statistics/1656460/big-four-annual-revenue-volume-per-company-2015/
ÌÇÐÄÆƽâ°æ. (2016). Annual revenue volume of the Big Four worldwide in 2015 (in billions of U.S. dollars). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 30, 2026. /statistics/1656460/big-four-annual-revenue-volume-per-company-2015/
ÌÇÐÄÆƽâ°æ. "Annual Revenue Volume of The Big Four Worldwide in 2015 (in Billions of U.S. Dollars)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 30 Jan 2016, /statistics/1656460/big-four-annual-revenue-volume-per-company-2015/
ÌÇÐÄÆƽâ°æ, Annual revenue volume of the Big Four worldwide in 2015 (in billions of U.S. dollars) ÌÇÐÄÆƽâ°æ, /statistics/1656460/big-four-annual-revenue-volume-per-company-2015/ (last visited July 30, 2026)
Annual revenue volume of the Big Four worldwide in 2015 (in billions of U.S. dollars) [Graph], ÌÇÐÄÆƽâ°æ, January 30, 2016. [Online]. Available: /statistics/1656460/big-four-annual-revenue-volume-per-company-2015/
