The statistic shows Deloitte's worldwide revenue in 2010 and 2011, by subregion. In 2011, Deloitte's total revenue added up to 28.8. billion U.S. dollars. Deloitte is one of the world's four leading accountancy firms (along with PwC, E&Y, and KPMG). It is headquartered in New York City. Services are audit, consulting, financial advisory, tax, and enterprise risk.