Big 4 Companies: Deloitte, PwC, EY, and KPMG — Revenue, Salaries, and Careers Explained

Big 4 Companies: Everything You Need to Know

What Are the Big 4 Companies?

The Big 4 companies are the four largest professional services and accounting networks in the world: Deloitte, PwC, EY, and KPMG. Together, they generated more than $220 billion in combined global revenue in 2025 and employed over 1.5 million people across 150+ countries. Each firm offers audit, tax, advisory, and consulting services to governments, banks, and large corporations. The Big 4 dominate the global market for statutory audits of listed companies.

Who Are the Big 4 Accounting Firms?

The Big 4 accounting firms are Deloitte, PwC (PricewaterhouseCoopers), EY (Ernst & Young), and KPMG. Each firm operates as a network of member firms rather than a single global entity.

• Deloitte: Founded in 1845 in London. Global workforce: approximately 473,100 employees. Largest of the Big 4 by both revenue and headcount.
• PwC: Formed in 1998 through the merger of Price Waterhouse and Coopers & Lybrand.
• EY: Formed in 1989 through the merger of Ernst & Whinney and Arthur Young.
• KPMG: Formed in 1987 through the merger of Peat Marwick and Klynveld Main Goerdeler. Global workforce: approximately 276,030 employees.

Why Are They Called the Big 4?

They are called the Big 4 because they are the four largest professional services networks by revenue, headcount, and audit market share. Until 1989, the market had eight dominant firms, known as the Big 8. Mergers reduced this number to the Big 6, then the Big 5. In 2002, Arthur Andersen collapsed following the Enron accounting scandal, reducing the group to four firms. According to 2024 Ideagen Audit Analytics data, the Big 4 audited 89.5% of large accelerated filers in the United States. Globally, the four firms audit issuers representing about 80% of the total market capitalization of listed companies.

What Services Do the Big 4 Firms Offer?

The Big 4 firms offer four core service lines: audit and assurance, tax, advisory and consulting, and deals or transaction services. Each service line covers multiple specializations.

• Audit and Assurance: statutory audits, internal audits, financial statement reviews.
• Tax: corporate tax, transfer pricing, indirect tax, international tax structuring.
• Advisory and Consulting: strategy, technology consulting, human capital, risk advisory.
• Deals: mergers and acquisitions, valuations, due diligence, restructuring.
• Legal Services: select firms operate legal divisions in specific markets. KPMG launched a US legal division in February 2026.

How Much Revenue Do the Big 4 Firms Generate?

The Big 4 firms generated a combined global revenue of over $220 billion in 2025. Every firm recorded year-on-year growth.

Deloitte became the first professional services firm in history to cross the $70 billion revenue mark in FY2025, recording 4.9% year-on-year growth. KPMG's tax revenue grew 7.5% in the same period, the fastest growth rate among the four firms in that service line.

What Is the Big 4 Presence in India?

The Big 4 firms operate as some of the largest professional employers in India, with a combined workforce of close to 2.3 lakh professionals. Offices span Mumbai, Bengaluru, Gurugram, Hyderabad, Chennai, Pune, Kolkata, and Ahmedabad.

• Combined India revenue for FY24 reached approximately ₹38,500–38,800 crore across the four firms.
• EY India recorded over ₹13,400 crore in FY24 revenue, growing 16–17% year-on-year.
• Deloitte India recorded ₹10,000 crore in FY24 revenue, growing 29% year-on-year, with a workforce of approximately 140,000 employees.
• PwC India recorded ₹9,200 crore in FY25 revenue, growing 22% year-on-year.
• KPMG India recorded ₹5,900–6,200 crore in FY24 revenue, growing between 5.5% and 10%.

Deloitte India announced plans in 2023 to add 40,000 to 50,000 new employees, expanding its India workforce to around 30% of Deloitte's global headcount. 

What Qualifications Are Required to Work at the Big 4?

A professional qualification in accounting, finance, or law is required to work at the Big 4, most commonly CA, ACCA, CMA, CS, CPA, or an MBA in finance. Requirements vary by service line and role level.

• Audit and Tax roles: CA, ACCA, or CPA qualification, or candidates pursuing these qualifications through CA articleship or internship.
• Cost and Management Accounting roles: CMA India or CMA USA qualification.
• Compliance and Secretarial roles: Company Secretary (CS) qualification.
• Consulting and Advisory roles: MBA, engineering, or specialized technology degrees, alongside relevant certifications.

Candidates with a professional qualification consistently receive higher starting compensation than candidates with only an undergraduate commerce degree.

What Is the Big 4 Salary in India?

Big 4 salaries in India range from ₹4.5 LPA for part-qualified candidates to over ₹40 LPA at the senior manager level. Compensation depends on the qualification, role, department, and city.

• CA fresher salary: ₹8.5–12 LPA.
• ACCA newly qualified (Big 4, metro cities): ₹7–10 LPA. See the full ACCA salary breakdown in India.
• ACCA part-qualified or affiliate: ₹5–10 LPA.
• CMA part-qualified or Inter: ₹4.5–7 LPA.
• Senior Manager level: ₹22–40 LPA, depending on department and firm.

Candidates without an additional postgraduate qualification typically reach a compensation ceiling of ₹22–25 LPA at the Senior Manager level. A CPA, CFA, or specialized MBA is generally required to progress beyond this range.

How Can You Get a Job at the Big 4 After CA, ACCA, or CMA?

Candidates get into the Big 4 through campus placements, articleship or internship conversion, and direct applications. The hiring process typically includes an aptitude test, a technical interview on accounting standards, and an HR round.

1. Campus Placements: Institutes with active Big 4 placement drives give candidates direct access to interview slots.
2. Articleship or Internship: CA articleship or CMA articleship at a Big 4 firm frequently converts into a full-time offer.
3. Direct Application: qualified candidates apply through each firm's careers portal for open roles in audit, tax, or advisory.
4. Referral and Alumni Networks: candidates already working at a Big 4 firm can refer qualified applicants for open positions.

Candidates weighing their options can also read about career options after ACCA or job roles after CMA USA. Students can compare CA, ACCA, CMA, and CS course requirements before choosing the qualification path best aligned with a Big 4 career, or find a suitable batch to begin preparation.

How Do the Big 4 Differ From Mid-Size Firms?

The Big 4 differ from mid-size firms in revenue scale, global reach, client size, and audit market concentration. Mid-size and regional firms operate with a fraction of the resources and headcount.

• Revenue Scale: the Big 4 generated over $220 billion combined in 2025, compared to a few billion dollars for the largest mid-size networks such as BDO or Grant Thornton.
• Audit Market Share: The Big 4 audited 89.5% of large accelerated filers in the United States in 2024, leaving a small share for all other firms combined.
• Client Base: The Big 4 primarily serve Fortune 500 companies, multinational corporations, and large listed entities. Mid-size firms typically serve small and mid-sized businesses.
• Global Reach: The Big 4 operate in 150+ countries with standardized global methodologies. Mid-size firms often operate through regional networks or affiliations.
• Career Progression: Big 4 firms offer structured, faster promotion cycles and global mobility. Mid-size firms often offer earlier client-facing responsibility with a smaller team structure.

Both firm types recruit CA, ACCA, and CMA-qualified candidates, but starting compensation, brand recognition, and international exit opportunities remain consistently higher at the Big 4.