The Big 4 accounting firms are:

  1. Deloitte (Deloitte Touche Tohmatsu) – A global professional services firm offering audit, tax, consulting, and financial advisory services.
  1. PwC (PricewaterhouseCoopers) – A multinational network known for audit, tax, and advisory, including deals and strategy consulting.
  1. EY (Ernst & Young) – A global firm focused on assurance, tax, consulting, and strategy services.
  1. KPMG (Klynveld Peat Marwick Goerdeler) – A global network providing audit, tax, and advisory services, with hundreds of offices in over 150 countries.