Top 100 accounting firms in the United Kingdom (2026 list)

These are the largest accounting and professional services firms in the United Kingdom, led by EY with over 400,000 employees globally. Other significant firms include KPMG UK, a provider of tax, audit, and advisory services, PwC UK, which focuses on building trust and solving problems, and Azets, a professional services firm in Northern Europe. BDO UK offers tax, audit, and advisory services, while Grant Thornton UK provides assurance, tax, and advisory. Davies specializes in professional services and technology for the insurance sector.

A clear pattern among these companies is their headquarters location: almost all are based in London. Notable exceptions include Tax Consultant in Brighton and Cooper Parry, which states its headquarters simply as "UK". The founding dates of these firms span from the mid-19th century, with Cooper Parry founded in 1850 and MHA in 1880, to more recent establishments like KPMG UK in 1987 and RSM UK in 1988, indicating a mix of long-established and relatively newer large firms.

#	Company	Industry	Headquarters	Employees	Founded
1	EY ey.com A global organization with diverse teams in over 150 countries provides assurance, consulting, law, strategy, tax, and transactions to help clients grow and transform	Professional Services	🇬🇧 London	404,207	n/a
2	KPMG UK kpmg.com A leading UK provider of tax, audit, and advisory services with a global presence, focusing on innovative solutions and expertise for clients' needs	Business Consulting and Services	🇬🇧 London	15,102	1987
3	PwC UK pwc.co.uk Professional services firm focusing on building trust in society and solving important problems through partnership and commercial expertise.	Accounting	🇬🇧 London	10,873	n/a
4	Azets azets.com A leading professional services firm in Northern Europe, providing advisory, accounting, audit, HR, recruitment, outsourcing, and technology solutions to clients	Accounting	🇬🇧 London	7,523	n/a
5	BDO UK bdo.co.uk Provides tax, audit, assurance, accounting, business advisory, and outsourcing services to diverse sectors with a client-focused, innovative approach.	Accounting	🇬🇧 London	6,800	1903
6	Grant Thornton UK grantthornton.co.uk Providing assurance, tax, and advisory services through a global network, combining local insight with flexible, client-focused solutions.	Accounting	🇬🇧 London	5,972	1904
7	Davies davies-group.com Specialist professional services and technology firm providing risk management, business process optimization, and digital transformation solutions to insurance, regulated, and global businesses	Insurance	🇬🇧 London	5,693	n/a
8	RSM UK rsmuk.com Professional services network providing expertise, resources, and client-focused solutions to empower businesses with confidence and deep understanding.	Accounting	🇬🇧 London	5,025	1988
9	RSM rsm.global Global network providing assurance, tax, and consulting services focused on middle-market businesses with client-centric, insightful, and resource-sharing approach.	Professional Services	🇬🇧 London	4,090	1964
10	Moore Global moore-global.com Global accounting and advisory firm with over 37,000 professionals in 114 countries, dedicated to helping clients thrive through expert guidance and support	Accounting	🇬🇧 London	3,884	1907
11	MHA mha.co.uk Offers financial and business strategy services to enterprises and individuals, supporting growth, success, and sustainable wealth creation globally.	Accounting	🇬🇧 London	3,439	1880
12	Tax Consultant wearegalloways.com A traditional general practice with a specialist tax consulting team supporting accountants, solicitors, and financial advisers in providing high-level services to clients	Accounting	🇬🇧 Brighton	3,015	n/a
13	Sumer sumer.co.uk Championing small to medium UK and Ireland businesses by uniting expert firms to provide collaborative support and growth solutions.	Accounting	🇬🇧 London	2,608	n/a
14	S&W swgroup.com Financial and professional services firm specializing in wealth management, accountancy, tax advisory, and investment management solutions.	Professional Services	🇬🇧 London	2,218	1881
15	Cooper Parry linktr.ee This B Corp provides audit, tax, innovation, tech, outsourcing, deals, wealth, sustainability, legal, and digital services to entrepreneurial businesses.	Financial Services	🇬🇧 Uk	1,698	1850
16	AAB aabgroup.com A tech-enabled group providing business critical services including audit, accounting, tax, HR, payroll, financial planning, wealth management, and organizational consulting	Professional Services	🇬🇧 Aberdeen	1,663	1990
17	Crowe UK crowe.com Providing audit, tax, advisory, and consulting services with deep market knowledge to businesses, nonprofits, pension funds, and private clients.	Accounting	🇬🇧 London	1,518	n/a
18	Moore Kingston Smith mooreks.co.uk Providing multi-disciplinary advisory, tax, and audit services to diverse clients locally and internationally, fostering positive change and understanding.	Accounting	🇬🇧 London	1,358	n/a
19	Xeinadin xeinadin.com Providing expert business advice infused with technology and global expertise, Xeinadin Group empowers companies to reach their strategic objectives efficiently	Accounting	🇬🇧 London	1,323	2019
20	Saffery saffery.com A partner-led top 20 accountancy firm specializing in corporate finance, entrepreneurs, and international clients, committed to long-term relationships and tailored strategies	Accounting	🇬🇧 London	1,322	1855
21	TC Group tc-group.com Innovative firm of accountants and professional advisers offering a full range of services in financial planning, legal, HR, and technology	Accounting	🇬🇧 Steyning	1,236	1992
22	Interpath interpath.com Providing expertise and creative solutions for critical business decisions, guiding clients towards the right path quickly	Financial Services	🇬🇧 London	1,220	n/a
23	No Comment europa-recht.eu An independent firm providing comprehensive accounting services to clients in various sectors, including taxation, audit, bookkeeping, and payroll processing with a personalized approach	Accounting	🇬🇧 London	1,191	1998
24	Menzies LLP menzies.co.uk Leading UK advisory and accountancy firm offering financial, operational, and strategic support to businesses and individuals internationally across various sectors	Accounting	🇬🇧 London	1,115	1912
25	K3 Advisory Group k3advisorygroup.com A UK professional services firm in Greater Manchester offering advisory services to SMEs, including business sales, tax services, and restructuring solutions	Financial Services	🇬🇧 Bolton	1,114	n/a
26	PKF Global pkf.com Network of independent firms providing audit, accounting, tax, legal, and business advisory services across 150 countries worldwide.	Accounting	🇬🇧 London	877	1969
27	Nexia nexia.com Network of independent accounting and consulting firms providing audit, tax, advisory, and business services with global collaboration.	Accounting	🇬🇧 London	872	1991
28	Johnston Carmichael Chartered Accountants and Business Advisers johnstoncarmichael.com Scotland's largest independent firm of chartered accountants and business advisers, part of the international network Moore Global, offering a wide range of financial services	Accounting	🇬🇧 Aberdeen	855	1936
29	Looking for new opportunities springboardaccounting.co.uk Providing accounting services tailored for sole traders and small to medium-sized enterprises	Accounting	🇬🇧 Stapleford	854	2020
30	TaxAssist Accountants taxassist.co.uk Specializing in providing accountancy services, tax advice, bookkeeping, and payroll for small businesses, with opportunities for individuals to open their own accounting practice	Accounting	🇬🇧 Norwich	824	1995
31	Baldwins Accountants baldwinsaccountants.co.uk The company provides accounting, tax, audit, advisory, and business services digitally and in person to help organizations achieve their ambitions	Accounting	🇬🇧 Walsall	770	1971
32	PKF-Francis Clark Chartered accountants & business advisers pkf-francisclark.co.uk A firm of chartered accountants and business advisers in the South West, providing expert advice, support, and a supportive culture	Accounting	🇬🇧 Exeter	757	1919
33	Blick Rothenberg blickrothenberg.com Leading tax, accounting and business advisory firm offering audit, accounting, business advisory, corporate and personal tax services built on integrity and expertise.	Accounting	🇬🇧 London	736	1945
34	Grant Thornton International Ltd grantthornton.global Global professional services firm providing assurance, tax, and advisory services with a personal, agile, and proactive approach in over 149 countries	Accounting	🇬🇧 London	727	n/a
35	PKF Littlejohn pkf-l.com A fast-growing firm of accountants and business advisers in London, Leeds, and Manchester, offering audit, tax, and advisory services with expertise in capital markets, insurance, international businesses, and charities	Accounting	🇬🇧 London	715	n/a
36	HaysMac haysmac.com Top 30 chartered accountants and tax advisors providing services to businesses, charities, and organizations, with international reach through MSI Global Alliance	Accounting	🇬🇧 London	702	2001
37	Hawksford hawksford.com An international provider of Corporate, Private Client, and Fund services, offering tailored solutions for businesses, entrepreneurs, and high-net-worth individuals worldwide	Financial Services	🇬🇧 St Helier	670	1963
38	Armstrong Watson armstrongwatson.co.uk Financial services company providing tailored advice and protection to clients in the North of England and Scotland, offering a range of specialist services and financial advice	Accounting	🇬🇧 Carlisle	632	1867
39	Kreston Reeves krestonreeves.com Providing personalized accountancy, business, and wealth advice with a focus on social responsibility, guiding clients and communities towards a brighter future	Accounting	🇬🇧 London	614	1821
40	UHY Hacker Young uhy-uk.com Award-winning UK chartered accountants with 24 offices across England, Wales, and Northern Ireland providing full service support for commercial and personal financial matters	Accounting	🇬🇧 London	611	1925
41	KM kmaccountants.co.uk A long-standing chartered accountancy firm in Burnley offering advanced accounting technology, personalized services, and business advisory support for greater success	Accounting	🇬🇧 Burnley	601	1909
42	Buzzacott buzzacott.co.uk A top 25 UK accountancy firm based in London, providing tailored expertise for private clients, businesses, and not-for-profit organizations worldwide	Accounting	🇬🇧 London	591	1919
43	BKL bkl.co.uk BKL is a top firm of chartered accountants and tax advisers, known for expertise in tax matters and building relationships with ambitious clients	Accounting	🇬🇧 London	591	1980
44	Wilkins Kennedy wilkinskennedy.com An accounting and advisory firm providing a full range of services to businesses and individuals across the UK and abroad Specializing in various market sectors and business divisions	Accounting	🇬🇧 City of London	587	1882
45	Kreston Global kreston.com Accounting firms global network, offering compliance and advisory services, building partnerships based on trust, integrity, and collaboration worldwide.	Accounting	🇬🇧 London	570	1971
46	DJH djh.co.uk An award-winning accountancy and business advisory group offering integrated services including accounts, tax, R&D, corporate finance, and more across multiple offices	Accounting	🇬🇧 Stoke-on-Trent	536	1997
47	Affinia affinia.co.uk A UK firm offering chartered accountancy, tax advisory, and business consultancy services, helping clients achieve success through strategic planning and expert guidance	Accounting	🇬🇧 Colchester	526	1963
48	Hazlewoods hazlewoods.co.uk A top UK business advisor and Chartered Accountant, Hazlewoods offers personalized accounting, tax, audit, and business advice, aiming to support clients at every stage of their journey	Accounting	🇬🇧 Cheltenham	517	1919
49	Outbooks outbooks.co.uk Leading provider of outsourcing services to accounting firms, offering bookkeeping, accounting, and tax preparation to over 10,000 clients worldwide, boosting margins through expert teams and smart technology	Outsourcing and Offshoring Consulting	🇬🇧 Harrow	496	2010
50	Price Bailey pricebailey.co.uk Leading firm of accountants and advisers offering consultancy, planning, accounting, tax, and financial services to SMEs, private clients, and national/international businesses in East Anglia and London	Accounting	🇬🇧 Bishop's Stortford	473	1938
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51	Streets streets.uk A UK firm offering accounting, tax, and financial advisory services to clients including businesses, professionals, organizations, and high net worth individuals	Accounting	🇬🇧 Lincoln	459	1907
52	Corient Business Solutions Limited corientbs.co.uk Outsourcing Accounting and Bookkeeping Company providing a wide range of services including finance, HR, customer service, and back office services, with a focus on cost reduction and business growth	Accounting	🇬🇧 Coventry	457	2011
53	BHP, Chartered Accountants bhp.co.uk A leading independent firm in the North of England, providing expert full-service offerings in compliance, tax planning, corporate finance, and business advice across various industries	Accounting	🇬🇧 Sheffield	452	1867
54	PEM pem.co.uk PEM is an independent firm of accountants, tax, and business advisers with over 145 years of experience serving clients globally	Accounting	🇬🇧 Cambridge	445	1875
55	bk plus bkplus.co.uk BK Plus supports SMEs, OMBs, and Entrepreneurial businesses with tailored support including funding, growth strategies, and exit plans, led by experienced founders David Baldwin and Shaun Knight	Accounting	🇬🇧 Aldridge	438	2021
56	Old Mill om.uk A group of financial experts specializing in digital accounting, financial planning, and tax advisory for individuals and businesses in the South West region	Accounting	🇬🇧 Yeovil	434	n/a
57	Mazars in the UK mazars.co.uk Professional services firm undergoing rebranding, updating LinkedIn presence to Forvis Mazars in the UK, focusing on client communication.	Accounting	🇬🇧 London	429	n/a
58	Duncan & Toplis duncantoplis.co.uk A leading independent accounting and business advisory firm in the East Midlands offering a comprehensive range of services to clients	Accounting	🇬🇧 Grantham	426	1925
59	Dains Accountants & Advisers dains.com A team of specialists in the Midlands helping individuals and businesses achieve future success through personalized and passionate service	Accounting	🇬🇧 Birmingham	399	1926
60	Gravita gravita.com Gravita provides innovative accounting solutions to assist fast-growing SMEs, listed companies, international businesses, and individuals with planning, growth, and financial services	Accounting	🇬🇧 London	396	n/a
61	mgr mgr.co.uk London-based accountancy business providing exceptional accounting, tax, and business advisory services to corporates, entrepreneurs, creatives, and private clients Member of ETL GLOBAL network	Accounting	🇬🇧 London	394	2013
62	Rawlinson & Hunter LLP rawlinson-hunter.co.uk Provision of taxation advisory, compliance, accountancy, and assurance services to individuals, families, entrepreneurs, and businesses globally.	Accounting	🇬🇧 London	387	1933
63	Shaw Gibbs shawgibbs.com A UK accountancy practice in Central and Southern England providing expert solutions for businesses and individuals, focusing on client value and utilizing cutting-edge technology	Accounting	🇬🇧 Oxford	369	n/a
64	HLB International hlb.global Global network of independent advisory and accounting firms, offering innovative services to help clients grow internationally Operating in 157 countries with over 47,000 partners	Professional Services	🇬🇧 London	360	1969
65	Larking Gowen larking-gowen.co.uk Specialist accountancy firm offering corporate finance, personal tax, legal advice, business strategy, support, and recovery services across multiple regions.	Accounting	🇬🇧 Norwich	353	1888
66	PayStream paystream.co.uk PayStream provides payroll, umbrella, tax, software, and accountancy services for recruitment agencies, contractors, and businesses with a focus on compliance and tailored solutions	Financial Services	🇬🇧 Altrincham	353	2000
67	Haines Watts hwca.com A top chartered accountancy firm specializing in advising and supporting owner-managed businesses, offering commercial, supportive, challenging, practical, and approachable services	Accounting	🇬🇧 Swindon	352	1930
68	SKS Business Services raa-uk.com SKS offers tailored financial services to businesses of all sizes, specializing in finance function outsourcing to help clients build and preserve wealth effectively	Accounting	🇬🇧 London	348	2008
69	HW Fisher, part of the Sumer Group hwfisher.co.uk provides expert accountancy, tax, audit, corporate and financial advisory services to SMEs, corporates, charities, and high net-worth individuals	Accounting	🇬🇧 London	348	1933
70	MIAA nhs.uk Provider of assurance and solutions services to public and third sector clients, helping improve services and deliver value to communities	Accounting	🇬🇧 Liverpool	316	1990
71	Albert Goodman linktr.ee The company offers excellent service with a positive experience, guiding clients through managing accounts, navigating change, and seizing new opportunities	Accounting	🇬🇧 Taunton	313	1866
72	DFK International dfk.com A Top 10 international association of independent accounting firms and business advisers, emphasizing client understanding, personal service, and ethical standards	Accounting	🇬🇧 London	298	1962
73	Russell Bedford International russellbedford.com A global network of independent firms providing accounting, auditing, tax advice, and business consulting services to clients worldwide since 1983	Accounting	🇬🇧 London	298	1983
74	Quantuma quantuma.com A leading business advisory firm offering expert advice on transactions, dispute resolution, financial challenges, and a range of professional services globally	Financial Services	🇬🇧 London	277	n/a
75	Brookson (A People2.0 Company)brookson.co.uk With over 20 years of experience, the company revolutionizes professional services for the changing world of work by providing innovative solutions	Financial Services	🇬🇧 Warrington	270	1995
76	PKF Smith Cooper pkfsmithcooper.com A leading firm of accountants and business advisors in the Midlands, offering a range of audit, accountancy, tax, and advisory services globally	Accounting	🇬🇧 Derby	266	1985
77	UNW unw.co.uk A leading firm of chartered accountants providing a wide range of accountancy and advisory services, with a strong focus on exceptional people and client care	Accounting	🇬🇧 Newcastle upon Tyne	253	n/a
78	SRLV srlv.co.uk A mid-tier firm offering diverse services in business management, accounting, and advisory Specializing in creative, corporate, owner-managed businesses, and private client services worldwide	Accounting	🇬🇧 Fitzrovia	237	1988
79	KBM Chartered Certified Accountants & Registered Auditors kbmuk.co.uk An independent firm of Chartered Accountants offering accounting services, audits, and financial planning to companies across the UK	Accounting	🇬🇧 London	237	1987
80	Campbell Dallas campbelldallas.co.uk Providing comprehensive accounting, tax, audit, advisory, and business services both digitally and in person to help organizations achieve their ambitions #AzetsBRANDNewDay	Accounting	🇬🇧	236	1999
81	UHY International uhy.com A leading network of independent audit, accounting, tax, and consulting firms with offices in 100 countries, part of the 20th largest international accounting network	Accounting	🇬🇧 London	232	1986
82	Sable International sableinternational.com A group of companies specializing in financial and immigration services for global citizens, offering tailored expertise and personalized service by experienced professionals	Financial Services	🇬🇧 London	217	1995
83	HSJ Accountants, Business & Tax Advisors hsjaccountants.co.uk The company offers accounting, tax, payroll, audit, compliance services, cloud conversion packages, software provision, training, and outsource solutions to help clients achieve their goals	Accounting	🇬🇧 Newport	216	2000
84	Sedulo sedulo.co.uk A rapidly expanding UK business advisory firm offering expert financial and business services to corporate entities, SMEs, nonprofits, and private clients	Financial Services	🇬🇧 Manchester	209	2009
85	MGI Worldwide mgiworld.com Global network of independent audit, tax, and accounting firms with almost 9,000 professionals in 400 locations, providing personalized services to small and medium-sized businesses worldwide	Accounting	🇬🇧 London	207	1947
86	Henderson Loggie hlca.co.uk Leading Chartered Accountants and Business Advisors in Scotland, providing a wide range of services including audit, tax, business advice, and financial services with a focus on delivering practical solutions	Accounting	🇬🇧 Dundee	205	1909
87	Sopher + Co sopherco.com Entrepreneurial accounting firm in London providing personalized services, expertise in tax, corporate finance, and business growth for individuals and businesses	Accounting	🇬🇧 London	204	1975
88	Mitchell Charlesworth mitchellcharlesworth.co.uk A North West firm of accountants providing solutions to businesses with partner-led services, catering to a diverse range of clients	Accounting	🇬🇧 Liverpool	203	1885
89	Lovewell Blake lovewell-blake.co.uk A leading firm of Chartered Accountants and Financial Planners in East Anglia, providing innovative services and expert advice for client growth and development	Accounting	🇬🇧 East Anglia	199	1858
90	EQ Accountants, part of the Sumer Group eqaccountants.co.uk A modern and energetic accounting practice in Scotland with over 210 staff offering business, finance, and taxation services, specializing in various industries	Accounting	🇬🇧 Dundee	198	2004
91	Crunch crunch.co.uk Accounting software and professional services designed to support and simplify financial management for small UK businesses and self-employed individuals.	Financial Services	🇬🇧 Hove	195	2009
92	Grant Thornton (NI) LLP grantthorntonni.com A growing professional services firm offering innovative solutions to business challenges with a focus on long-term relationships and core values	Professional Services	🇬🇧 Belfast	190	1899
93	Galloways Accounting wearegalloways.com A rapidly growing accounting firm in Sussex providing comprehensive services to businesses and individuals, prioritizing clients and their needs	Accounting	🇬🇧 Brighton	189	n/a
94	EST est-group.co.uk A multi-service professional practice providing HR consultancy, accountancy, tax advice, and commercial finance solutions to businesses	Business Consulting and Services	🇬🇧 Groesfaen	189	2013
95	Lubbock Fine lubbockfine.co.uk An independent accounting, tax, audit, and business advisory firm in the heart of London, helping clients achieve financial success through innovative solutions and exceptional service	Accounting	🇬🇧 London	186	1929
96	Wbg wbg.co.uk A leading Scottish firm providing accounting, business, and tax advisory services to clients across the UK Specializing in various sectors Mission is client success and growth	Accounting	🇬🇧 Glasgow	183	n/a
97	EY Private Client Services ey.com Specializing in private client services, the company provides expert tax advice and support for individuals, families, and businesses with US/UK cross-border needs	Accounting	🇬🇧 London	166	2021
98	MHA Moore and Smalley mooreandsmalley.co.uk A trusted firm offering outstanding client service, continuous improvement, and global resources to support businesses' domestic and international growth	Accounting	🇬🇧 North West England	149	1892
99	Opus Business Advisory Group opusllp.com A diverse group of practices specializing in business advisory, restructuring, M&A, forensic accounting, equity investment, business rescue plans, and turnaround services	Financial Services	🇬🇧 London	147	2013
100	AGN International agn.org A global association of independent accounting firms offering assurance, tax, and advisory services, with a focus on high standards and client service	Accounting	🇬🇧 London	146	1996

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Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 13, 2026.

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