RankingsBig 4 Accounting Firms

The Big 4 accounting firms table ranks the top four firms in the UK by total UK fee income.

PwC, Deloitte, EY and KPMG are the leading players in the accountancy industry, with their services spanning advisory, audit and assurance, tax, risk consulting and management consulting, and capital and transaction management. All four firms work across a variety of industries, including aerospace, automotive, banking, construction, hospitality, pharmaceuticals, transportation, wealth management, media, government and public sector, manufacturing, private equity, technology, oil and energy, financial services, healthcare, insurance, professional services, real estate, retail, and telecommunications.

The Big 4 have experienced significant growth in recent years, and the UK firms are part of a global network of firms across Africa, the Americas, Asia-Pacific, Europe, and the Middle East.
Collectively, PwC, Deloitte, EY and KPMG have over 3,000 partners. The current senior partners and leaders of each UK firm are Kevin Ellis (PwC), David Sproul (Deloitte), Steve Varley (EY), and Bill Michael (KPMG).

As part of firm strategy and direction, all four firms have strengthened their focus on tackling key economic and social issues affecting both the accountancy sector and the UK as a whole in recent years. These issues include Brexit, diversity and the gender pay gap, social mobility, and digital transformation.

Ranking vs 2016
Name
UK income fee(£m)
% change vs 2016
Year end
UK partners
Fee per partner (£m)

Big 4 Accounting Firms

The Big 4 accounting firms table ranks the top four firms in the UK by total UK fee income. PwC, Deloitte, EY and KPMG are the leading players in the ...

View
Big 4 Accounting Firms

About Deloitte

Big 4 Accounting Firms

The Big 4 accounting firms table ranks the top four firms in the UK by total UK fee income. PwC, Deloitte, EY and KPMG are the leading players in the ...

View

Big 4 Accounting Firms

The Big 4 accounting firms table ranks the top four firms in the UK by total UK fee income. PwC, Deloitte, EY and KPMG are the leading players in the ...

View

Big 4 Accounting Firms

The Big 4 accounting firms table ranks the top four firms in the UK by total UK fee income. PwC, Deloitte, EY and KPMG are the leading players in the ...

View

Related Content

MTD is an opportunity, not a chore
AI in Accounting

MTD is an opportunity, not a chore

5h Reshma Roy Suvish, Director of the Accountants Channel and Partnerships (UK and Europe) Zoho

MTD is an opportunity, not a chore

HMRC’s MTD ITSA rollout forces a shift to quarterly filing. Discover how UK accounting firms can eliminate the "shadow tax" and turn compliance into r...

View
35 Under 35 2026: Unveiling the Second Wave of Winners
35 under 35

35 Under 35 2026: Unveiling the Second Wave of Winners

4d nikita alexander

35 Under 35 2026: Unveiling the Second Wave of Win...

The second wave of Accountancy Age’s 35 Under 35 ranking for 2026 is here. It highlights nine exceptional professionals who are redefining UK accounti...

View
Submissions Open for the 2026 Accountancy Age Top 50+50
50+50

Submissions Open for the 2026 Accountancy Age Top 50+50

5d Accountancy Age

Submissions Open for the 2026 Accountancy Age Top ...

Submissions are officially open for the 2026 Accountancy Age Top 50+50 Rankings, run in partnership with Intuit QuickBooks. Now in its second decade, ...

View
35 Under 35 2026: Unveiling the First Wave of Winners
35 under 35

35 Under 35 2026: Unveiling the First Wave of Winners

6d Accountancy Age

35 Under 35 2026: Unveiling the First Wave of Winn...

The first wave of Accountancy Age’s 35 Under 35 ranking for 2026 is here. Explore how this year’s honourees are reshaping UK accounting, from scaling ...

View
The quiet tech revolution reshaping UK accountancy in 2026
Accounting Software

The quiet tech revolution reshaping UK accountancy in 2026

6d nikita alexander

The quiet tech revolution reshaping UK accountancy...

UK firms are moving past AI hype to embrace automated workflows and cloud infrastructure that slash routine admin, ensure MTD compliance and unlock ad...

View
Why HMRC's first crypto tax data should alarm every accountant
HMRC

Why HMRC's first crypto tax data should alarm every accountant

1w nikita alexander

Why HMRC's first crypto tax data should alarm ever...

With HMRC’s inaugural crypto data revealing £1.38bn in gains and automatic exchange reporting set for 2027 under CARF. UK accountancy firms must urgen...

View
Goodbye quarterly reporting, hello e-invoicing: How UK businesses need to rethink tax compliance
Budget

Goodbye quarterly reporting, hello e-invoicing: How UK businesses need to r...

2w Hertz Casseus, Senior Regulatory Associate at Thomson Reuters

Goodbye quarterly reporting, hello e-invoicing: Ho...

Hertz Casseus, Senior Regulatory Associate at Thomson Reuters, breaks down why the UK’s 2029 e-invoicing mandate is far more than a minor software pat...

View
£16bn in unpaid corporate tax and 81,000 crypto letters - HMRC widened its net
Digital assets

£16bn in unpaid corporate tax and 81,000 crypto letters - HMRC widened its ...

2w nikita alexander

£16bn in unpaid corporate tax and 81,000 crypto le...

HMRC is running two enforcement campaigns at once. Overseas multinationals, led by US firms are sitting on an estimated £16.1 billion in underpaid tax...

View
85% of firm leaders see future in automation, only 17% plan to transform
Accounting Firms

85% of firm leaders see future in automation, only 17% plan to transform

3w nikita alexander

85% of firm leaders see future in automation, only...

While 85% of accounting leaders expect AI to improve their firm's business model, fewer than two in ten are restructuring to capture the financial ups...

View