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 2018 they had combined revenues of over 148 billion U.S. dollars. As of 2018, PwC had the second largest worldwide revenue of the Big Four, narrowly behind Deloitte which made around 1.9 billion U.S. dollars more than the company during that year. The revenue of PwC has increased year on year. Between 2007 and 2018, the company’s annual revenue grew by around 19.2 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 2018, the assurance services generated just over 17 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 2018 the revenue more than doubled from 6.2 billion U.S. dollars to just under 13.8 billion U.S. dollars. Tax services made the smallest portion of PwC’s revenue in 2018, having generated just under 10.5 billion U.S. dollars.