The United Kingdom is home to some of the most prestigious and trusted accounting firms in the world, making it a global hub for financial services, tax advisory, and business consulting. Whether you are a multinational corporation, a fast-growing start-up, or an individual seeking expert financial planning, the top accounting firms in the UK consistently deliver excellence and reliability. These firms offer a wide range of services, including auditing, bookkeeping, tax compliance, payroll management, business valuation, risk assessment, and corporate finance advisory. With London serving as one of the largest financial centers globally, accounting companies in the UK are known for combining decades of experience with innovative digital solutions such as cloud accounting and automated reporting.
In recent years, the demand for specialized services in areas like forensic accounting, sustainability reporting, and financial technology integration has grown rapidly. The best UK accounting firms are not only adapting to these changes but also setting industry standards through cutting-edge practices and strong ethical frameworks. Businesses looking for trusted partners often turn to these firms for their proven track record of accuracy, professionalism, and global reach. This ranking of the top ten best accounting firms in the UK highlights firms that continue to lead in audit quality, client satisfaction, and industry innovation, ensuring businesses of all sizes achieve financial stability and growth in an increasingly competitive market.
The Top Ten Best Accounting Firms In The UK In 2025
10. Mazars UK
Mazars in the UK has grown steadily in recent years as it balances audit tax and advisory work for corporate clients and owner managed businesses. The firm has invested in cloud accounting platforms and data analytics to speed reporting and improve insight for finance teams. In audits Mazars has faced scrutiny from regulators which has pushed the firm to accelerate investment in training quality controls and audit technology.
That process of self improvement has led to a stronger focus on forensic accounting and sustainability reporting where clients demand evidence based outcomes. For businesses seeking a firm that combines hands on client service with a move to digital platforms Mazars offers pragmatic alternatives to larger networks while still providing sector expertise in manufacturing technology and professional services. Recent results show continued UK revenue growth and an expanding professional head count as the firm reinvents its audit and advisory approach to meet new regulatory and ESG expectations.
9. Azets
Azets occupies a distinctive place in the UK market by focusing on small and medium sized businesses and fast growth companies that need practical accounting payroll and tax support alongside advisory help. The firm has been an early adopter of cloud accounting automation and client portals that streamline bookkeeping VAT and payroll while freeing finance teams to concentrate on performance and cash flow forecasting.
Azets blends local office presence with a centralised technology backbone so firms with regional operations get consistent reporting and timely management information. That combination of personal service and efficiency makes Azets attractive to owners who want professional accounting delivered without unnecessary complexity. Financial results show Azets as a growth leader among its peers and underline the firm’s success in winning SMEs and scaling services into advisory areas such as corporate finance and tax planning.
8. Evelyn Partners
Evelyn Partners has evolved from the merger of well known wealth and professional services brands into a major integrated business that combines wealth management private client tax and corporate advisory. The firm is recognized for wealth planning investment management and for helping business leaders with succession planning and corporate restructuring. Evelyn Partners has been expanding assets under management and delivering steady net inflows which has strengthened its position in the UK wealth market.
The firm leans on technology enabled portfolio reporting and tax efficient strategies while offering outsourced finance and specialist tax services for corporates. That dual focus on private client outcomes and professional services creates a unique proposition for entrepreneurs family offices and corporate boards that want unified advice across finance tax and investment. Recent reporting highlights record assets under management and improved profitability as Evelyn tightens integration between advisory and investment capabilities.
7. RSM UK
RSM is the go to adviser for many middle market companies seeking audit tax and consulting help that is scaled to the realities of growing firms. The network invests heavily in financial reporting tools automation and sector specific analytics so clients get timely insight into margins working capital and risk exposure. RSM’s strength lies in offering complex transaction support restructuring and corporate finance advice while keeping the service model accessible for companies outside the top tier.
The firm has also grown its consulting footprint offering technology transformation services that include cloud accounting system implementations robot process automation and data visualisation to modernise finance functions. That capability mix has helped RSM increase revenue and head count as it competes for market share in the middle market where agility and technical depth matter most. Recent financial reports show a material revenue rise and a significant expansion in people resources.
6. Grant Thornton UK
Grant Thornton is a strong adviser to entrepreneurial businesses and corporate clients that require audit tax and advisory services with strategic depth. The firm emphasizes growth strategy commercial due diligence and management reporting along with tax efficiency and corporate finance execution. Grant Thornton has invested in digital audit tools and data driven advisory which help clients reduce reporting cycles and improve forecasting accuracy.
The practice is frequently engaged on transactions and restructuring work where mid market experience matters and where advisors must marry technical skill with commercial judgement. Recent annual results show healthy net revenue growth and improved operating profit underscoring the firm’s ability to capture advisory mandate flow while maintaining quality in assurance work. That combination of capabilities makes Grant Thornton a compelling option for companies seeking specialist advice without the scale complexity of global networks.
5. BDO UK
BDO competes with larger firms by offering personalised audit and advisory services for mid sized and growing companies, backed by significant investment in audit quality and technology. The firm has prioritised audit improvements data analytics and investment in specialist tax capability while also expanding its consulting practice into digital transformation and supply chain advisory. BDO’s client focus is often on privately owned businesses and fast scaling companies that need partner level access and practical solutions for cash flow tax and international expansion.
The firm has recently reported record global and UK revenues and is investing in talent and systems to support further growth. Those investments are designed to close the audit quality gap and deliver modern reporting tools such as real time dashboards and automated compliance workflows which help managers make faster decisions. BDO’s position is strong among firms seeking a balance of technical excellence and hands on client attention.
4. KPMG UK
KPMG offers a broad set of services across audit tax advisory and transformation and is a major resource for public companies and complex private enterprises. The firm blends regulatory and sector expertise with investments in advanced analytics cloud transformation and AI enabled audit tooling. That emphasis helps clients manage risk improve controls and accelerate close processes while meeting rising expectations on environmental social and governance reporting.
KPMG’s advisory teams often work on large scale technology programmes finance function redesign and transaction execution, bringing an integrated view that links compliance to strategic opportunity. Recent results show steady revenue and renewed focus on profitability and partner reinvestment, reflecting a strategy that pairs specialist capability development with client centric delivery. For firms that value deep sector teams and enterprise grade consulting KPMG remains a primary choice.
3. EY UK
EY offers scale and investment in areas that matter for future ready businesses such as digital transformation AI data analytics and sustainability reporting. The firm has expanded consulting and tax offerings while maintaining large assurance teams for listed company audits and corporate reporting. EY’s market position is built on combining strategy and operations advice with technology led solutions that automate reporting integrate finance and operations data and surface opportunities for cost and revenue improvement.
Clients appreciate the firm’s cross functional teams who bring compliance, tax and transformation perspectives into a single programme of work. EY has reported strong UK revenue growth in recent years while accelerating work in ESG services and technology enabled audits which positions clients to meet both investor and regulator expectations. That breadth and depth makes EY a natural partner for organisations pursuing growth while navigating an evolving regulatory landscape.
2. Deloitte UK
Deloitte is a market leader in audit advisory consulting and digital services and is widely regarded for delivering large scale transformation programmes alongside traditional accounting services. The firm invests heavily in AI enabled analytics cloud migration and industry specific platforms to help clients modernise finance operations and unlock productivity. Deloitte’s consulting practice often helps chief financial officers redesign reporting architectures implement planning and analysis tools and adopt automation that cuts cycle time and improves scenario planning.
That integrated approach from tax and audit through to strategy and technology gives clients a single point of accountability for complex change. Deloitte’s recent financial disclosures show material UK scale and continued investment in people learning and technology even as market conditions evolve. Organisations that need an end to end partner for both technical accounting and enterprise transformation regularly work with Deloitte.
1. PwC UK
PwC remains the most visible accounting and professional services firm in the UK thanks to a broad set of capabilities across audit tax advisory consulting and risk management. The firm has placed clear emphasis on human led tech powered services and invests in data analytics cloud accounting transformation and sustainability solutions designed to help organisations meet new reporting standards and stakeholder expectations. PwC’s integrated approach supports everything from audit quality and regulatory response to tax planning corporate restructuring and performance transformation.
The firm is a go to adviser for multinational clients and large UK corporates that require rigorous reporting frameworks and a partner capable of delivering strategy and execution at scale. Recent annual reporting shows substantial UK revenue and ongoing investment in quality people and systems which underpins its market leadership and ability to service the most demanding assignments.