Ernst & Young Global Limited, trade name EY, is a multinational professional services partnership. EY is one of the largest professional services networks in the world. Along with Deloitte, KPMG and PwC, it is considered one of the Big Four accounting firms. It primarily provides assurance, tax, information technology services (including managed services in areas like Cybersecurity, Cloud, Digital Transformation and AI), consulting, and advisory services to its clients.

The company has the following four main service lines:

• Assurance: comprises Financial Audit, Financial Accounting Advisory Services, CCaSS (Climate Change and Sustainability services) and Forensic & Integrity Services.
• Tax: Transfer Pricing, International Tax Services, Business Tax Compliance, Global Trade, Indirect Tax, Tax Accounting & Risk Advisory Services, Tax Technology and Transformation, Transaction Tax.
• Consulting: comprises three sub-service lines – Business Consulting, Technology Consulting, and People Advisory Services.
• Strategy and Transactions (SaT): deals with companies’ capital transformation – including Valuation, Modelling, and Economics (VME); Transactions Due Diligence; Real Estate Advisory; M&A; Turnaround & Restructuring (financial and operational); Corporate Finance.
• People Advisory Services: HR, immigration, workforce mobility programs
• Core Business Services: business development, marketing, legal, risk management