Tax Companies in the UK: A Practical Selection Guide (2026)
AC
Acumon Chartered Accountants·14 min read
This practical guide provides an overview of tax services companies in the UK and the different areas they cover. The list is designed as a general overview rather than ranking the companies, with each one offering its own approach, expertise, and client focus. Some companies provide a wide range of tax and advisory services for larger organisations, while others focus on specific areas or work mainly with smaller businesses and private clients. The goal is to give readers useful context about who these companies are, who they support, and what strengths they bring. This overview can help businesses and individuals make a more informed decision when comparing available tax support options.
Acumon
Acumon is a UK firm of chartered accountants and tax advisors providing tax services to companies, owner-managed businesses, individuals, and organisations. Its tax practice covers corporate and personal tax, VAT, tax compliance, tax planning, and specialist areas including R&D tax credits, capital gains tax, property taxation, and international tax matters. The firm combines tax work with accounting, audit, and wider business advisory services, allowing tax matters to be considered alongside financial reporting and business decisions.
The firm works with organisations ranging from growing owner-managed businesses and limited companies to larger corporate groups, as well as individuals with more complex personal tax affairs. Acumon’s tax team includes professionals with previous HMRC experience, and its services cover both ongoing compliance and planning undertaken before significant business or personal financial decisions are made.
Acumon provides support across a broad range of UK tax requirements. Corporate tax work includes preparation of corporation tax returns and computations, tax planning, capital allowances, loss utilisation, R&D relief, and support with group structures. The firm also provides personal tax services covering income tax returns and planning, alongside advice relating to capital gains, inheritance tax, property, and internationally mobile individuals.
The firm’s tax services also extend to specialist compliance and reporting requirements. These include Making Tax Digital, VAT, ATED, Stamp Duty Land Tax, Patent Box, and EIS and SEIS matters. Acumon also provides support during HMRC enquiries, investigations, and disputes, giving clients access to tax assistance where routine compliance develops into a more detailed regulatory matter.
Acumon works with finance teams, business owners, directors, and individuals to maintain tax compliance while considering available reliefs and planning opportunities. Its tax services can be delivered alongside accounting and bookkeeping, audit, and other financial services, which can be relevant for businesses managing several reporting and compliance obligations at the same time.
Tax Capabilities
Acumon provides tax services across a range of business, personal, property, and specialist tax requirements.
These include:
Corporation tax compliance and advisory
Personal income tax returns and planning
VAT and Making Tax Digital support
Research and Development (R&D) tax relief
Capital Gains Tax planning and compliance
Inheritance Tax planning
Property tax advice
International and double taxation advice
HMRC enquiry and investigation support
Stamp Duty Land Tax (SDLT) advice
ATED compliance and reporting
Patent Box support
EIS and SEIS tax advice
Tax engagements are typically handled by experienced tax professionals and can be coordinated with Acumon’s accounting and wider financial services.
Regulatory Licences and Registrations
Acumon operates within the UK professional accountancy and audit regulatory framework.
These include:
ICAEW Registered Auditor
UK statutory audit registration
Public Interest Entity (PIE) audit authorisation
Registered company operating in England and Wales
VAT registration
These registrations support the firm’s wider accounting and audit activities, while its tax services are delivered as part of its broader chartered accountancy practice.
Core Services
In addition to tax compliance and planning, Acumon provides a range of specialist tax services covering business, personal, property, and transaction-related requirements.
These include:
Corporation tax services
Personal tax services
VAT and Making Tax Digital services
R&D tax credit support
Capital Gains Tax advice
International tax and double taxation advice
Property tax services
Stamp Duty Land Tax advice
ATED compliance
Patent Box services
EIS and SEIS support
HMRC investigation and dispute support
Tax work is often delivered alongside discussions with management, business owners, finance teams, and individuals regarding reporting requirements, tax obligations, and planning decisions.
Many organisations encounter more complex tax requirements as they grow, change their ownership structure, expand internationally, or introduce new activities.
Acumon works with clients that are:
Managing Ongoing Corporation Tax Obligations
Preparing Tax Returns and Statutory Filings
Expanding Into International Markets
Undertaking Research and Development Activities
Managing Property Investments or Transactions
Reviewing Business or Personal Tax Planning
Dealing With HMRC Enquiries or Investigations
Early tax planning can help businesses and individuals understand their reporting obligations, consider available reliefs, and address tax consequences before significant transactions or financial decisions are completed.
Address: 1-2 Craven Road, Ealing, London, W5 2UA, UK
Deloitte
Deloitte provides tax services for companies, multinational organisations, investors, and private clients. Its tax practice covers corporate taxation, indirect taxes, international tax, employment tax, transfer pricing, and transaction-related advisory. The firm works with organisations that need support with tax compliance, regulatory changes, business restructuring, and cross-border operations.
Deloitte’s tax teams often work as part of broader advisory projects where taxation is connected with mergers and acquisitions, digital transformation, workforce decisions, or international expansion. Its approach is generally suited to larger organisations that require access to specialists across multiple tax areas and jurisdictions.
Key Facts
Ideal for: Large companies, international groups, and organisations with complex tax requirements
Core services: Corporate tax, international tax, VAT, employment tax, transfer pricing
Specialization: Complex tax advisory and compliance projects
Location: UK-wide
Notable strength: Wide range of tax expertise across industries
Contact Information
Website: www.deloitte.com
Phone: +44 (0)113 243 9021
Address: 1 City Square, Leeds, LS1 2AL, United Kingdom
LinkedIn: www.linkedin.com/company/deloitte
Facebook: www.facebook.com/deloitteuk
Twitter: x.com/deloitteuk
PwC
PwC provides tax advisory and compliance services for businesses, private clients, investors, and public sector organisations. Its tax teams cover areas including business tax, international tax, deals tax, workforce taxation, indirect tax, and tax reporting. The firm supports organisations that need help understanding changing tax rules, managing obligations, and making informed decisions around business activities.
The company combines tax expertise with wider professional services, including consulting, assurance, and financial advisory. This approach allows PwC to support projects where tax considerations are connected with transactions, organisational changes, technology implementation, or international business structures.
Key Facts
Ideal for: Medium and large organisations with complex tax needs
Core services: Business tax, international tax, transaction tax, workforce tax, indirect tax
Specialization: Tax advisory connected with wider professional services
Location: UK-wide
Notable strength: Experience with corporate and international tax matters
Address: Central Square 29 Wellington St Leeds LS1 4DL
LinkedIn: www.linkedin.com/company/pwc-uk
Facebook: www.facebook.com/PwCUK
Instagram: www.instagram.com/pwc_uk
EY
EY provides tax advisory and compliance services for businesses, private clients, and international organisations. Its tax practice covers areas such as business tax, international tax, transaction tax, tax planning, tax reporting, workforce taxation, and tax-related legal support. The firm works with companies dealing with changing regulations, cross-border operations, investment decisions, and complex reporting requirements.
EY also supports organisations that need help improving their tax functions through technology, managed services, and operational changes. Its tax teams work across different industries and combine specialist knowledge with wider advisory capabilities, making the firm relevant for companies where taxation is connected with broader business decisions.
Key Facts
Ideal for: International companies, large businesses, and organisations with complex tax requirements
Specialization: Business tax advisory and tax function support Location: UK-wide
Notable strength: Combination of tax specialists and wider professional advisory services
Contact Information
Website: www.ey.com
Phone: +44 1224 653000
Address: 2 St Peters Square, Manchester M2 3DF
LinkedIn: www.linkedin.com/company/ernstandyoung
Facebook: www.facebook.com/EY
Twitter: x.com/EYnews
KPMG
KPMG provides tax services for businesses, private clients, and organisations across different sectors. Its tax practice includes business tax, indirect tax, international tax, transaction support, tax governance, managed services, and technology-enabled tax solutions. The firm works with companies that need support with compliance obligations, changing regulations, operational improvements, and strategic tax decisions.
The company also focuses on helping organisations improve how their internal tax functions operate. This includes areas such as process improvement, automation, reporting, data management, and risk control. KPMG’s tax services are often connected with broader business projects, including expansion into new markets, restructuring, acquisitions, and changes to operating models.
Key Facts
Ideal for: Medium and large businesses requiring specialist tax support
Core services: Business tax, international tax, VAT, tax transformation, managed tax services
Specialization: Tax advisory combined with technology and process improvement
Location: UK-wide
Notable strength: Support for complex corporate tax functions
Grant Thornton provides tax advisory and compliance services for businesses, organisations, and private clients. Its tax teams support companies with corporate tax, VAT, employment tax, international tax, transaction-related matters, tax disputes, and reliefs. The firm works with organisations that need practical tax advice connected with their financial and operational objectives.
The company serves businesses across multiple industries and combines UK tax knowledge with access to an international network. Its approach includes helping clients manage compliance responsibilities, understand legislative changes, and plan for future decisions. Grant Thornton is particularly active in supporting organisations that need advisory support without the scale of a global professional services group.
Key Facts
Ideal for: Growing businesses, mid-market companies, and organisations requiring advisory support
BDO UK provides tax services for businesses, entrepreneurs, international companies, and private individuals. Its tax teams cover corporate tax, VAT, personal tax, employment tax, international tax, and specialist advisory areas. The firm works mainly with organisations that need support with compliance requirements, tax planning, business growth, and ownership-related matters.
BDO’s services are structured around the needs of privately owned companies, mid-sized organisations, and larger businesses operating across different markets. Its tax advisers support clients through everyday reporting responsibilities as well as more complex situations such as restructuring, investment decisions, and international activities.
Key Facts
Ideal for: Owner-managed businesses, SMEs, and mid-sized organisations
Core services: Corporate tax, personal tax, VAT, international tax, employment tax
Specialization: Tax support for entrepreneurial and growing businesses
Location: UK-wide
Notable strength: Focus on privately owned and mid-market companies
Address: Central Square 29 Wellington Street Leeds, LS1 4DL, United Kingdom
LinkedIn: www.linkedin.com/company/bdo-llp
Instagram: www.instagram.com/bdo_uk
RSM
RSM UK provides tax advisory and compliance services for middle-market businesses, international companies, and private clients. The firm supports organisations with corporate tax, VAT, international tax, employment tax, personal tax, and specialist advisory requirements. Its services are designed for businesses that need ongoing tax support as well as guidance on specific financial decisions.
The company works with organisations across sectors including financial services, manufacturing, technology, and professional services. RSM combines local UK expertise with access to a global network, helping businesses manage domestic requirements while addressing international tax considerations. Its work often involves improving compliance processes, planning transactions, and responding to regulatory changes.
Key Facts
Ideal for: Mid-market companies and growing organisations
Core services: Corporate tax, VAT, international tax, personal tax, employment tax
Specialization: Tax advisory for businesses operating in changing environments
Location: UK-wide
Notable strength: Middle-market focus with international capabilities
Address: 4th Floor, The Capitol, 431 Union Street, Aberdeen, AB11 6DA
LinkedIn: www.linkedin.com/company/rsm-uk
Instagram: www.instagram.com/rsm.uk
Evelyn Partners
Evelyn Partners provides tax advisory, accounting, investment, and wealth management services for individuals, families, entrepreneurs, and businesses. The firm’s tax specialists support clients with personal taxation, business tax matters, inheritance tax planning, trusts, estate planning, and issues connected with ownership of private companies. Its approach combines tax advice with broader financial planning, making it relevant for clients whose tax decisions are linked with long-term wealth management goals.
The company works with private clients and business owners who may require support across several areas of financial planning rather than a single tax requirement. Its services cover both compliance and advisory work, including helping clients understand tax obligations, review available planning options, and manage more complex financial arrangements involving investments, family wealth, and business interests.
Key Facts
Ideal for: Private clients, entrepreneurs, families, and business owners
Core services: Personal tax, business tax, inheritance tax, trusts, wealth-related tax planning
Specialization: Tax advice connected with private wealth and financial planning
Location: UK-wide
Notable strength: Combination of tax expertise and wealth management services
Address: 45 Gresham Street, London, EC2V 7BG, United Kingdom
LinkedIn: www.linkedin.com/company/evelynpartners
Facebook: www.facebook.com/evelynpartners
Twitter: x.com/evelynpartners
Instagram: www.instagram.com/evelynpartners
Bishop Fleming
Bishop Fleming provides tax, audit, accounting, and advisory services for businesses, charities, and individuals. The firm’s tax teams support clients with corporate tax, VAT, personal tax, employment tax, and specialist advisory matters. It works with organisations across sectors including healthcare, education, property, professional services, and not-for-profit organisations, providing support with both compliance requirements and strategic tax decisions.
The firm has a strong focus on businesses operating in the UK market, particularly organisations that need practical advice from advisers familiar with regional business conditions. Its tax services cover everyday obligations such as returns and reporting, as well as more complex matters including restructuring, growth planning, and available tax reliefs.
Key Facts
Ideal for: SMEs, charities, and growing organisations
Core services: Corporate tax, VAT, personal tax, employment tax, advisory
Specialization: Regional business advisory and tax support
Location: UK
Notable strength: Experience working with privately owned businesses and organisations
Saffery is a UK accountancy firm providing tax, audit, and business advisory services for companies, partnerships, individuals, and not-for-profit organisations. The firm works extensively with private clients, owner-managed businesses, and organisations requiring specialist advice around personal taxation, corporate tax, inheritance tax, and business planning.
Its tax services include personal tax compliance, international private client matters, corporate tax, tax relief planning, transfer pricing support, and advice for business owners managing succession or ownership changes. Saffery also works with clients in specialist sectors where financial structures can be more complex, requiring detailed tax reporting and planning.
Key Facts
Ideal for: Private clients, family businesses, partnerships, and specialist organisations
Core services: Personal tax, corporate tax, inheritance tax, international tax, advisory
Specialization: Private client and owner-managed business tax matters
Location: UK
Notable strength: Specialist advice for individuals and businesses with complex financial affairs
UHY Hacker Young provides accounting, audit, and tax services through a UK network of member firms. Its tax teams support businesses, entrepreneurs, private individuals, and international organisations with corporate tax, personal tax, VAT, international tax, and specialist advisory requirements. The firm works with companies across different industries and provides support throughout different stages of business development.
The organisation’s network structure allows clients to access local advisers while benefiting from broader technical expertise. Its tax services include compliance support, tax planning, business restructuring advice, and assistance with issues affecting owners and shareholders. The firm is particularly relevant for businesses that prefer working with advisers who combine local knowledge with access to wider professional resources.
Key Facts
Ideal for: Businesses, entrepreneurs, and private clients seeking local tax support
Core services: Corporate tax, personal tax, VAT, international tax, compliance
Specialization: UK network approach with regional expertise
Location: UK-wide
Notable strength: Combination of local offices and specialist tax knowledge
TaxAssist Accountants focuses on tax and accounting services for small businesses, sole traders, and individuals across the UK. The company provides support with tax returns, bookkeeping, VAT, payroll, accounting, and business advice. Its network-based model allows business owners to work with local advisers who understand the requirements of smaller organisations and self-employed professionals.
The firm primarily serves clients who need ongoing assistance with everyday financial administration and tax compliance. Its services are designed around practical business needs, including preparing accounts, managing HMRC obligations, improving financial records, and helping owners understand their tax responsibilities.
Key Facts
Ideal for: Small businesses, freelancers, and self-employed professionals
Core services: Tax returns, VAT, bookkeeping, payroll, accounting support
Specialization: Tax and accounting services for SMEs
Location: UK-wide
Notable strength: Local adviser network focused on smaller businesses
Haines Watts provides accounting, tax, audit, and advisory services for owner-managed businesses and entrepreneurs. The firm works with privately owned companies that require support with corporate tax, personal tax, compliance, business planning, and financial decision-making. Its advisers help business owners manage everyday obligations while also considering longer-term issues such as growth, succession, and company structures.
The company focuses on working closely with entrepreneurs and management teams, providing tax advice alongside accounting and commercial guidance. Its services are suitable for businesses that need an ongoing relationship with advisers who understand the challenges faced by privately owned organisations.
Key Facts
Ideal for: Owner-managed businesses and entrepreneurs
Core services: Business tax, personal tax, accounting, compliance, advisory
Specialization: Support for privately owned companies
Location: UK-wide
Notable strength: Focus on entrepreneurs and growing businesses
UK tax services providers differ in their approach, from large professional firms supporting international organisations to specialist advisers focused on SMEs, entrepreneurs, and private clients. The main differences usually relate to the complexity of tax matters handled, industry experience, service scope, and the level of ongoing advisory support available.
Choosing a suitable tax services company depends on factors such as business size, sector, ownership structure, and the type of assistance required. Some organisations may need support with routine compliance, while others require guidance on restructuring, international taxation, investments, or long-term planning. The right fit comes from matching the firm’s expertise and service model with the client’s specific requirements.
AC
Written by the Acumon team
Acumon is an ICAEW-registered firm of chartered accountants and registered auditors
based in London, with offices in Pitstone, Aylesbury and Bournemouth. Need advice on
anything covered here? Talk to us.
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