| 1849 | Samuel Lowell Price sets up in business in London | |
| 1854 | William Cooper establishes his own practice in London, which 7 years later becomes Cooper Brothers | |
| 1865 | Price, Holyland and Waterhouse join forces in partnership | |
| 1874 | Name changes to Price, Waterhouse & Co. | |
| 1898 | Robert H. Montgomery, William M. Lybrand, Adam A. Ross Jr. and his brother T. Edward Ross form Lybrand, Ross Brothers and Montgomery | |
| 1957 | Cooper Brothers & Co. (UK), McDonald, Currie and Co. (Canada) and Lybrand, Ross Bros. & Montgomery (US) merge to form Coopers & Lybrand | |
| 1982 | Price Waterhouse World Firm forms | |
| 1990 | Schweizerische Revisionsgesellschaft (set up in 1912) merges with Price Waterhouse in Switzerland | |
| 1991 | Schweizerische Treuhandgesellschaft (set up in 1906) merges with Coopers & Lybrand in Switzerland | |
| 1998 | Worldwide merger of Price Waterhouse and Coopers & Lybrand to create PricewaterhouseCoopers | |
| 2002 | PricewaterhouseCoopers completes the sale of its management consulting department, PwC Consulting, to IBM | |
| 2005 | PricewaterhouseCoopers sells Actuarial Benefits & Insurance Solutions to Swisscanto | |
| 2008 | Tenth anniversary of the PricewaterhouseCoopers' merger |