Accountancy Age Top 50+50 Rankings 2025 in partnership with Intuit QuickBooks

Click here to view the full 50+50 List

Celebrating excellence in accountancy practice, the Top 50+50 Accountancy Firms 2025. Firms listed in the table are ranked by total UK fee income for the last financial year – and are based on the voluntary submission of data.

Brought to you in partnership with smart, simple accounting bookkeeping specialists, Intuit Quickbooks.

The rankings offers a definitive look at the UK’s largest accounting practices by UK fee income. This year’s list, published on AccountancyAge.com, celebrates firms that are scaling, diversifying services and strengthening their market positions amid ongoing economic and regulatory challenges.

The Big Four Maintain Dominance

At the top of the league table, the Big Four continue to set the pace, with:

• PwC retaining the No.1 position, reporting more than £6.36bn in UK fee income

• Deloitte, EY and KPMG following closely behind

These firms continue to demonstrate significant market stability and scale, reinforcing their status as the core pillars of the UK professional services landscape.

Strengthening Positions in the Upper Mid-Tier

Just below the Big Four, several major firms consolidate their leadership:

• BDO remains the UK’s fifth-largest practice, surpassing £1bn in fee income

• Grant Thornton UK and RSM hold strong positions thanks to deep national footprints and solid growth trajectories

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• Forvis Mazars, Azets, Moore UK, and PKF UK & Ireland all continue to expand their presence

These firms reflect the increasing sophistication of the upper mid-tier, offering a mix of audit expertise, advisory strength and regional coverage.

Fast-Growing Firms Shape the Next Wave

The lower half of the Top 50 and the Next 50 showcase some of the most dynamic players in the profession. Notable growth stories include:

• Sumer

• Cooper Parry

• Dains

• Crowe UK

• Evelyn Partners

These firms demonstrate how strategic focus, niche specialisms and digital-first service models are enabling rapid expansion — often outpacing traditional firms in percentage growth.

A Profession Diversifying Beyond Audit

While audit and tax remain foundational service lines across the ranking, the 2025 cohort shows continued diversification into:

• advisory

• deals and restructuring

• wealth and financial planning

• technology and data services

This diversification reflects evolving client expectations and a shifting revenue mix across the profession.

Technology and Talent Continue to Reshape the Market

Across the Top 100 firms, several themes stand out:

• Technology investment is rising sharply, from cloud and automation to early-stage AI adoption

• Talent strategies are under pressure as firms compete for audit specialists, tech-literate accountants and multidisciplinary talent

• Hybrid work models remain the norm, prompting firms to rethink training, culture and leadership pathways

As Intuit QuickBooks note in their commentary, technology is now a “competitive differentiator” — and the firms winning are those pairing digital capability with stronger advisory relationships.

Consolidation Signals a More Connected Market

M&A remains a defining trend across the Top 50+50:

• Firms are acquiring regional practices

• International networks continue to expand into the UK

• Mid-tier players are repositioning through mergers and partnerships

This consolidation is creating larger, more resilient platforms — while intensifying competition for both talent and clients.

Click here to view the full 50+50 List