Big 4 Revenue Comparison: How Much Does Each Firm Earn?

How Deloitte, KPMG, EY, and PwC Stack Up — And Why the Numbers Matter for Your Career

Deloitte, KPMG, EY, and PwC don't just dominate the accounting world — they collectively generate over $220 billion a year, making them some of the largest professional services organisations on the planet. Understanding where each firm sits in the revenue rankings isn't just a trivia exercise: it shapes hiring budgets, practice area growth, and where the best career opportunities are opening up right now.

💡 The Big 4 combined revenue surpassed $220 billion in 2025 — and every single firm grew year-on-year, signalling a market that's still expanding despite global economic headwinds.

Here's the full breakdown, firm by firm, with context on what these numbers mean if you're thinking about where to launch or grow your career.

Big 4 Revenue 2025: The Full Ranking

Revenue figures are the most commonly cited yardstick for firm size — and the gap between the top and bottom of the Big 4 is bigger than most candidates realise.

1. Deloitte — $70.5 billion
   For the fiscal year ending 31 May 2025, Deloitte reported global revenue of $70.5 billion, a 4.9% jump in USD terms from the prior year. That puts it almost $14 billion ahead of its nearest rival. The Americas region led growth at 7.1%, and consulting — specifically strategy, risk, and transactions — was the strongest service line at 5.5% growth.
2. PwC — $56.9 billion
   PricewaterhouseCoopers posted $56.9 billion for the year ending 30 June 2025, representing 2.9% growth. Advisory revenues were the brightest spot at 4.6%, while tax and legal grew more modestly at 1.1%. With 364,000 people in 137 countries, PwC remains the firm with the broadest global footprint.
3. EY — $53.2 billion
   Ernst & Young reported $53.2 billion for fiscal year ending June 2025, a 3.9% increase. Consulting and Tax were the fastest-growing lines at 5.2% and 5.5% respectively. EY-Parthenon, now the largest strategy consulting arm of any Big 4 firm by headcount (25,000 people), was a particular area of investment, backed by $250 million in AI tools.
4. KPMG — $39.8 billion
   KPMG reported $39.8 billion for the year ending 30 September 2025, growing 5.4% in USD terms — the fastest growth rate of any Big 4 firm this year. Tax & Legal led service line growth at 7.8%, with Audit not far behind at 6.4%.

What Revenue Means for Your Career Prospects

Revenue isn't just a number on a press release — it directly feeds into headcount, training budgets, and the kinds of projects each firm can win.

• For Students and Entry-Level Candidates: Bigger revenue typically means more graduate intake. Deloitte's sheer scale (~470,000 employees globally) means the highest volume of open roles at any given time. But KPMG's strong 5.4% growth in 2025 signals aggressive expansion — making it a smart target if you want a firm investing heavily in new talent. Check upcoming recruiting events at all four firms throughout the year.
• For Experienced Professionals: EY's $250 million AI investment and PwC's advisory growth suggest both firms are hiring laterally in technology consulting, data, and ESG advisory. If you have a few years of sector expertise, these are the firms actively building out specialised practices.
• For Current Consultants: Revenue signals which practice areas are growing. Tax is strong across all four firms (KPMG at 7.8%, EY at 5.5%, Deloitte at 5.4%). If you're looking to move internally or across firms, target the functions posting the highest growth numbers.

Where Growth Is Coming From: Service Line Breakdown

The headline revenue figures tell part of the story. The service line data reveals where each firm is actually placing its bets.

• Tax & Legal: The fastest-growing line across the board. KPMG led the pack at 7.8% in USD, EY at 5.5%, and Deloitte at 5.4%. Regulatory complexity worldwide is driving demand — and for candidates with tax or legal backgrounds, this is a strong signal.
• Advisory / Consulting: Deloitte's strategy and transactions business grew 5.5%; EY consulting grew 5.2%; PwC advisory 4.6%. All three are investing heavily in AI-enabled consulting, with EY's $250M AI bet being the most visible commitment.
• Audit & Assurance: The slowest-growing line overall, but KPMG posted 6.4% audit growth — the highest of any Big 4 firm — suggesting it's actively winning new audit mandates and expanding its assurance headcount.
• Strategy Consulting (EY-Parthenon): With 25,000 staff and a $250 million investment, EY's strategy arm is now the largest by headcount among the Big 4. If you're targeting a management consulting career, EY's positioning here is worth watching closely.
• Sustainability / ESG: Not broken out separately in most reports, but ESG advisory is embedded across advisory and consulting figures. All four firms cite sustainability-linked mandates as a material growth driver heading into 2026.
• Americas dominance: The region was the growth engine for Deloitte (7.1%), KPMG (5.6%), and PwC (5.5%) in 2025. UK and European operations lagged significantly — Deloitte's European arm grew just ~1%. If you're based in North America, this is a buyer's market for talent right now.

The Big 4 are all hiring — don't miss the next recruiting event near you 🎯

How to Use Revenue Data in Your Job Search

Most candidates never look at revenue reports — which is exactly why doing so gives you an edge in interviews and networking conversations.

1. Know the size gap: Deloitte is nearly twice the size of KPMG by revenue. That affects culture, career progression speed, and role specialisation. Larger firms offer more structured paths; smaller Big 4 firms often mean earlier responsibility and faster visibility.
2. Follow the growth lines: If a firm just posted 7.8% tax growth, that function is expanding — which means teams are growing and roles are opening. Cross-reference service line growth with the divisions you're targeting during applications.
3. Use it in your "why this firm?" answer: Saying "I read your FY2025 results — your advisory growth and EY-Parthenon investment really stood out" is a far stronger answer than "I like your culture." It shows commercial awareness, which every Big 4 firm explicitly looks for in candidates.
4. Watch the regional angle: If you're in Europe and Deloitte's European arm grew just 1%, that may signal a tighter hiring environment there. The Americas are where budgets are flowing in 2025–2026, so factor geography into your expectations.

Finding Events to Get in Front of Recruiters

Revenue growth means recruiting events — and all four firms run regular sessions for students and professionals looking to learn more or get noticed.

• Graduate open days — Deloitte, KPMG, EY, and PwC all run firm-wide insight days for final-year students, typically concentrated in the autumn recruitment cycle.
• Service line deep-dives — Tax, advisory, and audit-specific events let you meet the teams behind the growth numbers and ask targeted questions about day-to-day work.
• Diversity & inclusion events — All four firms host targeted events for underrepresented groups across multiple regions, often with fast-track application access.
• Virtual information sessions — Especially common at EY and KPMG, these are low-barrier ways to make a first impression with recruiters without committing to a full-day event.
• Career fairs — University and city-based fairs where all four firms participate remain one of the fastest routes to a first conversation with a recruiter.

Your Next Move

The Big 4 collectively generated over $220 billion in 2025 and every firm grew. That means recruiting budgets are alive, graduate intakes are expanding, and roles in tax, advisory, and AI-enabled consulting are multiplying faster than ever before.

The gap between Deloitte's $70.5B and KPMG's $39.8B doesn't make KPMG a lesser option — it makes it a different one, with a different culture, pace, and career path. Knowing these numbers before you apply puts you firmly in the tier of candidates who've actually done their homework.

📈 Revenue growth tells you where the firm is investing — and that's exactly where the jobs are. Follow the money, and you'll find the opportunities.

Browse upcoming Big 4 events at big4events.com/events — recruiting open days, insight sessions, and career fairs across Deloitte, KPMG, EY, and PwC, updated weekly.