PwC is part of the ‘Big Four’ along with Deloitte, EY and KPMG. The Big Four are the leading accounting and audit firms in the world and in 2019 they had combined revenues of over 154.7 billion U.S. dollars. As of 2019, PwC had the second largest worldwide revenue of the Big Four, narrowly behind Deloitte which made around 3.8 billion U.S. dollars more than the company during that year. PwC increased its revenue year-on-year. Over the last decade, the company’s annual revenue grew by around 15.8 billion U.S. dollars.
The three main service lines of PwC are assurance, advisory and tax services. Assurance, the purpose of which is to provide or improve on information or context for a client so that they can make more informed decisions, was PwC’s largest service line in terms of revenue since 2010. In 2019, the assurance services generated almost 17.4 billion U.S. dollars for PwC. Advisory services, which provides advice to current and future businesses on client potential and business opportunity, was the second largest service line for PwC in that year. Advisory has also been the fastest growing business sector, between 2010 and 2019 the revenue more than doubled from 6.2 billion U.S. dollars to almost 14.4 billion U.S. dollars. Tax services made the smallest portion of PwC’s revenue in 2019, having generated 10.7 billion U.S. dollars.