Business Tax Companies in London: Practical Selection Guide (2026)
AC
Acumon Chartered Accountants·13 min read
This practical guide looks at companies offering business tax services in London, rather than ranking them from first to last. The selection covers different types of companies, from larger accountancy practices with broad corporate tax capabilities to more focused specialists serving particular business needs. Each company brings a different mix of expertise, client focus and tax services, including areas such as corporation tax, VAT, international tax, transactions and ongoing compliance. The aim is to give useful context on who these companies are, the businesses they typically serve and their relevant strengths, making it easier to compare the options and decide which type of support fits your requirements.
Acumon
Acumon is a London-based firm of chartered accountants providing business tax, accounting, audit, and advisory services to companies and business owners. Its tax practice supports businesses with both recurring compliance obligations and tax matters connected with commercial decisions.
The company works with organisations ranging from small and owner-managed businesses through to larger companies, corporate groups, and internationally connected organisations. Business tax work can be coordinated with accounting, bookkeeping, payroll, VAT, and wider advisory services where these areas overlap.
Acumon’s business tax services cover corporation tax compliance and planning, capital allowances, VAT, R&D tax relief, Patent Box, and other areas of company taxation. The tax team includes professionals with previous HMRC experience, providing additional insight into compliance requirements, documentation, and HMRC enquiries.
For London businesses, tax requirements can become more involved as turnover increases, ownership structures change, new activities are introduced, or transactions take place. Companies trading internationally may also need to consider cross-border VAT, overseas activities, withholding taxes, and the interaction between UK and international tax requirements.
Tax planning is approached alongside compliance rather than as a separate year-end exercise. This can include reviewing the timing of expenditure, available reliefs, treatment of losses, profit extraction, and the tax implications of planned transactions before decisions are finalised.
Acumon works with business owners, finance teams, and management to manage current tax obligations while considering the tax consequences of future business decisions. Support can range from preparing corporation tax returns to ongoing advisory work for businesses with more complex tax requirements.
Business Tax Capabilities
Acumon provides business tax services covering routine compliance, tax planning, and specialist areas relevant to companies operating in London.
These include:
Corporation tax compliance and returns
Corporation tax planning and reliefs
VAT registration, returns, and advisory
R&D tax relief and Patent Box
Capital allowances and loss relief
International and cross-border tax matters
Business tax work can be delivered alongside accounting and financial reporting services, giving management a clearer connection between the company’s financial records, tax filings, and future planning.
Regulatory Licences and Registrations
Acumon operates as a UK accountancy practice with professional registrations relevant to its broader accounting, audit, and tax work.
These include:
ICAEW registered audit firm status
UK company registration
UK VAT registration
Chartered accountant-led professional services
HMRC-compliant tax filing support
Making Tax Digital compliant reporting support
These professional and regulatory arrangements support the firm’s work with businesses that require coordinated accounting, tax compliance, VAT, and financial reporting services.
Core Services
In addition to business tax advice, Acumon provides services covering the wider financial and compliance requirements of companies.
These include:
Corporation tax services
Business tax planning
VAT and Making Tax Digital services
R&D tax relief and Patent Box support
Accounts and bookkeeping
Payroll and business support
Audit and advisory services
Business tax work is often connected with discussions about company accounts, planned expenditure, profit extraction, investment, restructuring, and other decisions that may affect future tax liabilities.
Companies may require additional tax support as their activities expand, their reporting obligations become more complex, or their existing structure no longer reflects the way the business operates.
Acumon works with businesses that are:
Preparing corporation tax returns and computations
Reviewing tax planning before the financial year end
Expanding their activities or entering new markets
Managing increasingly complex tax and VAT obligations
Early tax input can help businesses identify relevant reliefs, prepare appropriate documentation, and understand the tax implications of commercial decisions before transactions or reporting deadlines are reached.
Address: 1-2 Craven Road, Ealing, London, W5 2UA, UK
PKF Littlejohn
PKF Littlejohn provides corporate and business tax services from London, alongside its wider audit, accounting and advisory practice. Its business tax team works with companies on annual corporate tax compliance as well as capital allowances, innovation incentives, transfer pricing, international tax, employee share incentives and transaction-related tax matters.
The firm also provides more extensive outsourced tax support for large businesses. This can include tax provisioning, Senior Accounting Officer requirements, tax strategy publication and Country-by-Country Reporting. That breadth makes the firm particularly relevant where a finance team needs assistance beyond preparing an annual corporation tax return.
Key Facts
Ideal for: Mid-sized companies, large businesses and international groups
Core services: Corporate tax compliance, transfer pricing, transaction tax, international tax and innovation incentives
Specialization: Business tax compliance combined with complex corporate advisory
Location: London
Notable strength: Outsourced tax function support for larger organisations
Address: 15 Westferry Circus, Canary Wharf, London E14 4HD
Twitter: x.com/PKF_Littlejohn
LinkedIn: www.linkedin.com/company/littlejohn
Instagram: www.instagram.com/pkf.littlejohn
Kreston Reeves
Kreston Reeves provides corporate tax compliance and advisory services through teams serving London, Kent and Sussex. Its corporate tax offering extends from routine reporting and compliance to business restructuring, exit planning, capital allowances, transfer pricing and international tax work.
The firm also advises on tax issues connected with mergers and acquisitions, due diligence, employee incentive arrangements and venture capital schemes such as EIS and SEIS. This gives businesses access to both ongoing compliance assistance and tax advice around funding, ownership changes and transactions.
Key Facts
Ideal for: Owner-managed businesses, growing companies and corporate groups
Core services: Corporate tax, R&D relief, restructuring, international tax and transaction tax
Specialization: Corporate tax throughout different stages of the business lifecycle
Location: London, Kent and Sussex
Notable strength: Broad combination of compliance, restructuring and transaction support
Contact Information
Website: www.krestonreeves.com
Phone: +44 (0)330 124 1399
Address: 2nd Floor, 168 Shoreditch High Street, London, E1 6RA
Twitter: x.com/KrestonReeves
LinkedIn: www.linkedin.com/company/kreston-reeves
Saffery
Saffery has a corporate tax practice that works with businesses on compliance, reporting and advisory matters. Its London team includes specialists working with owner-managed businesses, larger corporate groups and companies with international operations.
Corporate tax work can include capital allowances, R&D-related reliefs, due diligence, corporate reorganisations and taxation associated with acquisitions or company disposals. For multinational structures, the firm also handles issues including transfer pricing and cross-border restructuring through the Nexia network.
Key Facts
Ideal for: Owner-managed companies, larger groups and internationally active businesses
Core services: Corporate tax compliance, tax reporting, restructuring, due diligence and international tax
Specialization: Corporate and cross-border tax
Location: London
Notable strength: Tax support for businesses with transactions and international structures
Address: 71 Queen Victoria Street London EC4V 4BE, UK
LinkedIn: www.linkedin.com/company/saffery
Instagram: www.instagram.com/saffery_uk
Gerald Edelman
Gerald Edelman is a London accountancy and advisory firm with a dedicated corporate tax practice. Its corporate tax advisers assist limited companies with meeting Corporation Tax obligations while identifying available allowances, deductions and planning opportunities.
The firm’s positioning is particularly relevant to business owners who want ongoing tax advice alongside traditional compliance. Rather than treating the company tax return as an isolated year-end task, its service combines filing requirements with consideration of the wider tax position of the business.
Key Facts
Ideal for: Privately owned and owner-managed businesses
HW Fisher is a London chartered accountancy firm offering corporate tax services alongside audit, business solutions, consulting and transaction support. Its tax compliance service focuses on helping companies prepare their tax obligations accurately and on schedule.
The firm can also be relevant where corporate taxation overlaps with other business requirements, including VAT, transactions, financial reporting and wider strategic work. Its central London location and multidisciplinary service model make it an option for established businesses that prefer tax advisers within a broader accountancy relationship.
Key Facts
Ideal for: Established companies requiring tax and wider accounting support
Core services: Corporate tax compliance, VAT and business advisory
Specialization: Tax within a multidisciplinary accountancy service
Location: London
Notable strength: Access to tax, accounting, transaction and business advisory teams
Contact Information
Website: hwfisher.co.uk
Phone: +44 (0)20 7388 7000
Address: Acre House, 11-15 William Road, London, NW1 3ER
Instagram: www.instagram.com/hwfisheruk
HaysMac
HaysMac has a dedicated Business Tax practice in London that works with growing enterprises, owner-managed businesses, international groups and organisations in specialist sectors. Its services cover both corporation tax compliance and longer-term planning.
Compliance support includes tax computations and returns, tax accounting, group relief, capital allowances, Corporate Interest Restriction requirements and assistance with HMRC enquiries. The firm also advises businesses with more complex group or international structures, making its offering relevant where tax compliance is closely connected with strategic decisions.
Key Facts
Ideal for: Growing businesses, owner-managed companies and multinational groups
Core services: Corporation tax compliance, business tax planning, international tax and tax reporting
Specialization: Business tax for complex and growing organisations
Location: London
Notable strength: Detailed corporation tax compliance combined with proactive advisory work
MHA provides corporate tax services to businesses ranging from SMEs to large and multinational organisations. Its corporate tax practice covers compliance, tax advisory, due diligence and international tax matters.
London-based tax specialists within the firm work with owner-managed businesses, large corporates, international groups and financial services organisations. Advice can extend to transactions, tax risk, restructuring, R&D and cross-border taxation, while its Baker Tilly International connection supports clients operating in multiple jurisdictions.
Key Facts
Ideal for: SMEs, owner-managed businesses, larger corporates and international groups
Core services: Corporate tax compliance, tax advisory, due diligence, R&D and international tax
Specialization: Corporate and international taxation
Location: London
Notable strength: Access to domestic tax specialists and an international network
Blick Rothenberg has a substantial London tax practice covering corporate tax, international tax, transfer pricing, VAT, M&A and tax disputes. Its corporate specialists advise companies ranging from privately owned businesses to private equity-backed and international groups.
Corporate tax work can involve compliance as well as acquisitions, disposals, refinancing, reorganisations, demergers and group simplifications. The firm’s London team also has specialists focused on transaction and international tax, making it more relevant to companies with complex ownership or cross-border operations than businesses needing only a basic annual return.
Key Facts
Ideal for: Mid-market companies, international groups and private equity-backed businesses
Core services: Corporate tax, international tax, M&A tax, transfer pricing and VAT
Specialization: Complex corporate, international and transaction tax
Location: London
Notable strength: Broad specialist tax team for corporate structures and transactions
Contact Information
Website: www.blickrothenberg.com
Phone: +44 (0)20 7486 0111
Address: 16 Great Queen Street, Covent Garden, London, WC2B 5AH
Forvis Mazars provides business tax services for large corporate entities, mid-sized organisations and fast-growing companies. The firm’s UK offering includes corporate tax compliance and advisory, employment taxes, VAT, international tax, transaction structuring and personal taxation for business owners.
Its London office provides both corporate and personal tax compliance and advisory services. Businesses operating internationally can also access transfer pricing, global compliance, Pillar 2 and multi-jurisdiction structuring support through the wider Forvis Mazars network.
Key Facts
Ideal for: Mid-sized businesses, larger corporates and multinational organisations
Core services: Corporate tax, VAT, employment tax, international tax and transaction support
Specialization: Multi-disciplinary business and international taxation
Location: London
Notable strength: Broad international coverage for companies operating across jurisdictions
Contact Information
Website: www.forvismazars.com
Phone: +44 (0) 20 7063 4000
Address: 30 Old Bailey London EC4M 7AU United Kingdom
BDO provides corporate and business tax services covering compliance, reporting, tax strategy and complex advisory work. Its corporate tax practice helps businesses with annual compliance as well as R&D relief, tax risk, transaction taxation and venture capital reliefs.
For larger organisations and international groups, BDO can manage more complex reporting requirements including Senior Accounting Officer obligations, Country-by-Country Reporting, Corporate Interest Restriction and international tax compliance. London-based specialists also work on M&A, international expansion, transfer pricing and cross-border financing structures.
Key Facts
Ideal for: Mid-market companies, large corporate groups and international businesses
Core services: Corporate tax compliance, international tax, transaction tax, R&D and tax governance
Specialization: Complex corporate and international tax
Location: London and other UK offices
Notable strength: Extensive corporate tax capabilities supported by the BDO international network
Contact Information
Website: www.bdo.co.uk
Phone: 020 7486 5888
Address: 55 Baker Street London, W1U 7EU, United Kingdom
LinkedIn: www.linkedin.com/company/bdo-llp
Instagram: www.instagram.com/bdo_uk
Buzzacott
Buzzacott operates from a single London office and has a dedicated Business Tax team. It works with fast-growth companies, family businesses, professional practices and international groups, covering tax compliance alongside more complex advisory requirements.
Services range from corporation tax returns and employee incentives to transactions, transfer pricing and international tax matters. The firm also supports UK companies that form part of international groups, including work involving Corporate Interest Restriction, withholding taxes, treaty relief, VAT and transfer pricing.
Key Facts
Ideal for: Scale-ups, family businesses, professional firms and international groups
Core services: Corporation tax compliance, transaction tax, transfer pricing and international tax
Specialization: Business taxation for privately owned and internationally connected organisations
Location: City of London
Notable strength: Integrated business and international tax expertise from one London office
RSM provides corporate tax services for companies at different stages of their development, from start-ups and expanding businesses to quoted groups and international organisations. Its offering covers routine annual compliance, transactions, investment, acquisitions, disposals and succession planning.
For larger and international groups, RSM also handles tax strategy, Corporate Interest Restriction, Senior Accounting Officer compliance and overseas tax requirements. Its wider corporate tax practice covers areas such as innovation incentives, international tax, property taxation, transfer pricing and venture capital reliefs.
Key Facts
Ideal for: Growing businesses, larger companies and multinational groups
Core services: Corporate tax compliance, international tax, transfer pricing and transaction support
Specialization: Tax throughout the corporate lifecycle
Location: London and other UK offices
Notable strength: Corporate tax support that can scale with increasingly complex business structures
ECC is a Canary Wharf accountancy and tax practice working with start-ups, growing businesses and business owners. Its service range includes corporation tax returns and planning, VAT, bookkeeping, statutory accounts, payroll and director tax planning.
The firm also provides tax advisory and strategy services, HMRC query support, SEIS and EIS assistance and IR35 support. Compared with larger corporate tax practices, its service mix is geared more toward businesses wanting day-to-day accounting and tax requirements managed together.
Key Facts
Ideal for: Start-ups, small companies, growing businesses and directors
Core services: Corporation tax, VAT, accounts, payroll and tax planning
Specialization: Joined-up accounting and tax services for growing businesses
Location: Canary Wharf, London
Notable strength: Business tax combined with routine finance and accounting support
Taxsol is a London chartered accountant-led practice providing business accounting and tax services. Its published services cover corporation tax, VAT, payroll, bookkeeping, tax advice, capital gains tax, CIS and IR35.
Its scope is oriented toward smaller businesses and owners looking for a single provider to manage routine accounting, HMRC compliance and tax responsibilities. That positions Taxsol differently from the larger firms in this guide that concentrate more heavily on multinational reporting, transfer pricing and major transactions.
Key Facts
Ideal for: Small businesses, owner-managed companies and individual business owners
Core services: Corporation tax, VAT, payroll, bookkeeping and general tax advice
Specialization: Ongoing accounting and tax compliance
Location: London
Notable strength: Broad everyday accounting and tax support within one practice
Address: 167–169 Great Portland Street, London W1W 5PF, United Kingdom
Facebook: www.facebook.com/Taxsolconsulting
Instagram: www.instagram.com/taxsolconsultingltd
Conclusion
Business tax services in London vary considerably in scope. Some firms focus on corporation tax, VAT and routine compliance for owner-managed companies, while others have dedicated teams for international tax, transfer pricing, transactions, tax governance and complex corporate groups.
There is no single provider that fits every business. The practical choice depends on company size, ownership structure, international exposure, transaction activity and whether the business needs annual compliance alone or ongoing tax advice integrated with wider accounting and financial work.
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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