Tax Advisory Services Companies in the UK: Companies and Services Guide

Tax advice in the UK has moved well beyond annual returns and filing deadlines. For many organisations, it now plays a central role in decision making – from expansion plans and restructuring to succession and cross-border operations. A good adviser is not only there to calculate liabilities. They are often involved earlier, helping to structure decisions with compliance and long-term impact in mind.

Across the professional services landscape, there is a wide range of firms providing tax advisory support. Some sit within larger accountancy and audit practices, while others operate as dedicated tax boutiques focused on planning and technical interpretation. Their client base can span owner-managed businesses, high-net-worth individuals, international groups and regulated entities, depending on the firm’s background and expertise.

This guide highlights a selection of tax advisory services companies operating across the UK. It is not a ranking. The aim is simply to provide context – outlining what these firms typically offer, the types of clients they support, and the areas of tax where they tend to concentrate their work.

Acumon

Acumon is a London-based firm of chartered accountants and registered auditors providing statutory audit and tax advisory services to companies, charities and international corporate groups. The firm operates within a regulated professional environment where advisory work is closely aligned with financial reporting standards and governance expectations.

The firm supports owner-managed businesses, not-for-profit organisations, regulated entities and complex group structures. Tax advisory work is delivered within a regulated professional framework, with attention to UK legislation, reporting obligations and governance considerations.

Acumon is authorised to undertake audits of Public Interest Entities in the United Kingdom. Engagements involving listed and regulated organisations require enhanced oversight and regulatory discipline, which also shapes the firm’s approach to complex tax matters.

In addition to its UK registration, the firm holds audit licences in the Cayman Islands, British Virgin Islands, Jersey and the Isle of Man. These registrations enable Acumon to support corporate groups operating across multiple jurisdictions.

Many group structures combine UK operating entities with offshore holding companies, particularly in sectors such as investment management, technology and international trade. Advising in these environments requires familiarity with cross-border reporting requirements and multi-entity financial coordination.

Acumon works with finance teams and boards to address statutory obligations while supporting the development of structured tax processes, governance systems and internal oversight.

Tax Advisory Capabilities

Acumon provides tax advisory support across a broad range of organisational types and sectors.

These include:

• UK limited companies and corporate groups
• regulated organisations and Public Interest Entities
• UK subsidiaries within international structures
• charities and not-for-profit organisations
• growing owner-managed businesses
• offshore holding entities and investment vehicles

Tax engagements are typically led by senior professionals who remain directly involved throughout the advisory process.

Regulatory Licences and Registrations

Acumon operates within a regulated framework supported by several professional registrations.

These include:

• UK statutory audit registration
• Public Interest Entity authorisation
• Jersey audit licence
• Isle of Man audit licence
• Cayman Islands audit licence
• British Virgin Islands audit licence

These registrations allow the firm to support groups with entities in both the UK and recognised international financial centres.

Core Services

In addition to statutory audit, Acumon provides services that support tax compliance, reporting accuracy and governance oversight.

These include:

• corporate tax advisory
• tax compliance and reporting support
• cross-border tax structuring advice
• advisory for multi-entity corporate groups
• charity and not-for-profit tax advisory
• governance and internal control reviews
• risk and regulatory advisory

Tax advisory work is often delivered alongside discussions with management and boards regarding financial reporting structures and governance arrangements.

As organisations expand, tax matters frequently become more complex, particularly where operations extend across jurisdictions.

Acumon works with businesses that are:

• preparing for investment or corporate transactions
• expanding into new markets
• reviewing group structures
• formalising financial governance systems

Early engagement can help ensure that tax processes, documentation and oversight procedures remain aligned with statutory and regulatory requirements.

Contact Information

• Website: acumon.com
• Phone: 020 8567 3451
• E-mail: mail@acumon.com
• Address: 1-2 Craven Road, Ealing, London, W5 2UA, UK

Accace United Kingdom

Accace United Kingdom provides tax advisory and compliance services from its London office, supporting companies, trusts and individuals operating within the UK. Much of their work involves registrations, statutory filings and practical coordination with local authorities, particularly for businesses entering the UK market for the first time.

Where cross-border elements are involved, advice may include double taxation agreements or permanent establishment considerations. As part of an international network, UK obligations are often managed alongside requirements in other jurisdictions, which makes coordination an ongoing theme of their work.

Key Highlights:

• London-based tax team
• Support for UK market entry
• Cross-border coordination
• Registration and filing expertise

Services:

• UK tax registrations
• Corporate tax returns
• VAT and PAYE submissions
• Capital gains and dividend tax filings
• Assistance with tax authority enquiries
• Double taxation advisory

Contact Information:

• Website: www.accace.com
• E-mail: unitedkingdom@accace.com
• Facebook: www.facebook.com/Accace
• LinkedIn: www.linkedin.com/company/accace
• Instagram: www.instagram.com/accace_global
• Address: Berkeley Suite, 35 Berkeley Square, Mayfair London W1J 5BF, United Kingdom

Tax Advisory UK

Tax Advisory UK focuses primarily on tax planning and investigation support. Much of their work arises when an HMRC enquiry has already started, or where there is a risk of one. They work with Chartered Tax Advisors and investigation specialists, helping individuals and business owners understand their position before responding formally.

In more complex cases – such as Code of Practice matters or overseas disclosures – they coordinate the necessary technical input and outline the practical options available. Alongside investigation work, they also advise on inheritance tax, capital gains tax, property structuring and corporation tax issues.

Key Highlights:

• Focus on tax investigations
• Access to Chartered Tax Advisors
• HMRC enquiry support
• Property and inheritance tax advisory
• London-based office

Services:

• HMRC investigation support
• Worldwide Disclosure Facility assistance
• Inheritance tax planning
• Corporation tax advisory
• Stamp Duty Land Tax advisory
• VAT advisory

Contact Information:

• Website: taxadvisoryuk.co.uk
• E-mail: info@taxadvisoryuk.co.uk
• Facebook: www.facebook.com/100075685488451
• LinkedIn: www.linkedin.com/company/tax-advisory-uk
• Instagram: www.instagram.com/tax_advisory_uk
• Address: 124 City Road, London, EC1V 2NX
• Phone: 07908 074954

Apex Associates LLP

Apex Associates LLP combines tax advisory with online accounting support, working with startups, established businesses and private individuals. Their work often begins with practical business questions – restructuring, setting up a new operation, expanding into overseas markets – and then moves into the tax implications of those decisions.

They advise on corporate tax, VAT on international sales and indirect taxes, particularly where rules are changing or exposure needs clarification. Beyond planning, they assist with HMRC correspondence, tax audits and more complex transactions that require structured preparation.

Key Highlights:

• Tax advisory and online accounting support
• Work with startups and growing businesses
• Corporate tax and VAT focus
• Indirect tax and VAT reviews

Services:

• Corporate tax advisory
• VAT advisory and reviews
• Indirect tax guidance
• Tax audit support
• Business  support
• HMRC negotiations

Contact Information:

• Website: www.apexassociates.co.uk
• E-mail: info@apexassociates.co.uk
• Facebook: www.facebook.com/ApexAssociatesLLP
• Twitter: x.com/ApexAccountants
• LinkedIn: www.linkedin.com/company/apex-associates-llp
• Address: 58a Ilford Ln, Ilford IG1 2JY
• Phone: 020 3327 6340

Tax Advisors UK

Tax Advisors UK operates as a specialist tax advisory firm supporting both individuals and corporate clients. Their work spans planning and compliance, with an emphasis on ensuring obligations are met while reviewing how existing structures could be improved or clarified.

They handle routine filings, but also provide more detailed advice around property taxation, capital gains and inheritance planning. Where HMRC enquiries arise, they assist with communication and representation, helping clients navigate the process in a structured way rather than reacting informally.

Key Highlights:

• Personal and corporate tax advisory
• Compliance and planning support
• Property and capital gains focus
• HMRC enquiry assistance
• UK-based advisory service

Services:

• Personal tax planning
• Corporate tax advisory
• Capital gains tax advisory
• Inheritance tax planning

Contact Information:

• Website: taxadvisorsuk.co.uk
• E-mail: info@taxadvisorsuk.co.uk
• Facebook: www.facebook.com/people/Tax-Advisors/61574204536076
• LinkedIn: www.linkedin.com/company/tax-advisors-uk
• Address: Building 3, City West Business Park, Gelderd Rd, Holbeck Leeds LS12 6LN
• Phone: 08000986147

Tax Advisory Partnership

Tax Advisory Partnership provides UK, US and wider international tax advisory services from offices in London and Leeds. Their work frequently involves clients with dual reporting obligations, particularly where UK and US tax systems intersect.

The firm supports private clients, family offices and corporate businesses. Corporate work covers indirect taxes, innovation reliefs and employer-related matters, while private client assignments often focus on residency, mobility and cross-border exposure. The structure of the practice reflects a dedicated tax focus, with advisory and compliance forming the core of its offering rather than sitting within a broader accounting framework.

Key Highlights:

• UK and US tax advisory capability
• Offices in London and Leeds
• Private client and corporate focus
• Cross-border tax expertise

Services:

• UK private client tax services
• US private client tax services
• Corporate tax advisory
• Global mobility tax services
• Indirect tax advisory
• Innovation tax reliefs

Contact Information:

• Website: www.taxadvisorypartnership.com
• E-mail: info@tap-london.com
• LinkedIn: www.linkedin.com/company/tax-advisory-partnership
• Address: 14 Devonshire Square, London, EC2M 4YT
• Phone: +44 (0) 20 8037 1100

Perrys Chartered Accountants

Perrys Chartered Accountants provide tax advisory and planning services to businesses and individuals across London and Kent. They work with limited companies, partnerships and sole traders, advising on corporation tax, VAT, capital gains and related areas of UK taxation.

Much of their work involves helping clients understand how the rules apply in practice – what can be claimed, how capital allowances operate, how PAYE and National Insurance fit into wider business planning. They also assist with VAT compliance, including Making Tax Digital requirements and industry-specific matters such as the Construction Industry Scheme.

Key Highlights:

• Business and personal tax advisory
• Sector-specific tax support
• Corporation tax and VAT focus
• Inheritance and capital gains tax advice
• Support with PAYE and NI matters

Services:

• Corporation tax planning
• VAT advisory and compliance
• Capital gains tax advisory
• Inheritance tax planning

Contact Information:

• Website: perrysaccountants.co.uk
• Facebook: www.facebook.com/perryscharteredaccountants
• Twitter: x.com/PerrysAccs
• LinkedIn: www.linkedin.com/company/perrys
• Address: 4th Floor, 399-401 Strand, London, WC2R 0LT
• Phone: 020 7408 4442

Moore Kingston Smith

Moore Kingston Smith provides private client tax advisory services within a broader professional services structure. Their private client team works with individuals, families, trustees and executors on personal tax compliance and planning. The core areas are familiar – income tax, capital gains tax, inheritance tax – but much of the work turns on residence, domicile and how those rules apply in real situations rather than in theory.

Advisory support often moves beyond annual returns into estate planning, cross-border matters and trust administration. Where needed, they coordinate with legal and financial advisers so that tax advice fits into a wider framework rather than sitting separately.

Key Highlights:

• Private client tax advisory focus
• Cross-border and residence advisory
• Trust and estate administration
• HMRC representation

Services:

• Personal tax compliance
• Income tax advisory
• Capital gains tax planning
• Inheritance tax planning
• Residence and domicile advisory

Contact Information:

• Website: mooreks.co.uk
• Twitter: x.com/MooreKSLLP
• LinkedIn: www.linkedin.com/company/moore-kingston-smith
• Address: 38 Wigmore Street, London, W1U 2RU
• Phone: +44 (0)20 4582 1000

K3 Tax Advisory

K3 Tax Advisory focuses on tax planning linked to transactions and corporate structuring. Their work often begins when a business is preparing for a sale, acquisition, restructure or financing arrangement and tax needs to be addressed in detail rather than as an afterthought.

Alongside transaction support, they deal with employer-related taxes, indirect taxes and HMRC investigations. Engagements typically arise where tax risk or structural change requires careful review – particularly around exits, succession or cross-border expansion.

Key Highlights:

• Transaction and structuring tax advisory
• Corporate and international tax focus
• VAT and indirect tax support
• HMRC investigation assistance

Services:

• Tax support on mergers and acquisitions
• Corporate structuring advisory
• Succession and exit planning
• Employer tax solutions
• Personal tax planning

Contact Information:

• Website: www.k3.tax
• E-mail: info@k3.tax
• Address: 7th Floor, 
20 St Andrew St,
London, EC4A 3AG
• Phone: 0203 856 6720

HW Fisher

HW Fisher advises entrepreneurial businesses, high net-worth individuals and families on tax planning and compliance. A significant part of their work centres on private client affairs, including family structures, trusts and estate planning. Income tax, capital gains and inheritance tax are regular themes, but the discussions often extend into longer-term financial positioning.

International matters also feature, particularly where individuals relocate to or from the UK. In those situations, coordination across jurisdictions becomes essential. They work with overseas advisers where required, aiming to manage UK tax exposure without losing sight of compliance.

Key Highlights:

• Private client and family tax advisory
• Trust and estate planning support
• International tax coordination
• Compliance and planning services
• UK-based advisory team

Services:

• Personal tax planning
• Inheritance tax advisory
• Trust and estate tax services
• Cross-border tax advisory
• Tax compliance
• Family office support
• Tax dispute resolution

Contact Information:

• Website: hwfisher.co.uk
• Address: Acre House, 11-15 William Road, London, NW1 3ER
• Phone: +44 (0)20 7388 7000

dns tax

dns tax provides advisory services to private clients, businesses, landlords and property developers. Much of their work relates to property and investment structures, where tax treatment can materially affect long-term returns.

Beyond planning, they assist during tax investigations and disclosure processes involving HMRC. Engagements often arise when tax exposure needs to be reviewed in detail or where compliance has become more complex. Their services combine routine reporting with issue-specific advice when structural decisions are under consideration.

Key Highlights:

• Property and investment tax focus
• Corporate and private client advisory
• R&D tax relief support
• VAT planning services
• HMRC investigation assistance

Services:

• Property tax planning
• Inheritance tax planning
• Capital gains tax advisory
• VAT planning and compliance
• R&D tax relief advisory
• Tax investigations and disclosures

Contact Information:

• Website: www.dnstax.co.uk
• E-mail: dnstax@dnsaccountants.co.uk
• Address: Suite 304, 162-168 Regent St., London W1B 5TB
• Phone: 0333 2422 572

FTI Consulting

FTI Consulting provides European tax advisory services to multinational and large corporate clients operating in the UK and internationally. Their work includes corporate tax advisory, transaction support, compliance reporting and transfer pricing. Engagements often relate to structuring, tax risk management and cross-border matters affecting complex group arrangements.

Their team includes specialists in employment tax, VAT, real estate tax and restructuring. Much of their involvement arises around transactions, disputes or regulatory changes that require detailed technical input.

Key Highlights:

• Corporate and multinational tax advisory
• Transaction and restructuring support
• Transfer pricing expertise
• VAT and indirect tax advisory
• Tax dispute services

Services:

• Corporate tax advisory
• Transaction tax support
• Transfer pricing advisory
• VAT and indirect tax services
• Employment tax advisory
• Restructuring tax advisory

Contact Information:

• Website: www.fticonsulting.com
• Facebook: www.facebook.com/FTIConsultingInc
• Twitter: x.com/FTIConsulting
• LinkedIn: www.linkedin.com/company/fti-consulting
• Instagram: www.instagram.com/lifeatfti
• Address: 200 Aldersgate, Aldersgate Street, London EC1A 4HD, United Kingdom
• Phone: +44 20 3727 1000

Deloitte

Deloitte provides tax and finance advisory services in the UK, often linked to transactions, restructuring and ongoing tax management. Their teams work with multinational groups, privately owned businesses and family enterprises on matters such as mergers, supply chain changes, intellectual property structuring and government incentives.

They also advise on treasury functions, legal entity structuring and post-merger integration from a tax perspective. That involves reviewing documentation, assessing cross-border exposure and evaluating how operating model changes affect the tax position of a group.

Key Highlights:

• Tax and finance advisory linked to transactions
• Legal entity structuring and post-merger tax review
• Government grants and incentives advisory
• Tax dispute and controversy support

Services:

• M&A tax due diligence and structuring
• Value chain and customs advisory
• Intellectual property tax advisory
• Finance and treasury tax support
• VAT and indirect tax advisory

Contact Information:

• Website: www.deloitte.com
• Facebook: www.facebook.com/Deloitteie
• Twitter: x.com/deloitteuk
• LinkedIn: www.linkedin.com/company/deloitte
• Address: 1 New Street Square, London, EC4A 3HQ, United Kingdom
• Phone: +44 (0)20 7936 3000

Lawrence Grant LLP

Lawrence Grant LLP provides tax advisory and compliance services in London, supporting businesses and individuals with returns and planning. Their team prepares and submits tax filings while also advising on how UK tax rules apply to different business structures and personal arrangements. The focus is steady compliance combined with practical explanation.

Beyond routine submissions, they advise on tax planning opportunities and financial decisions that affect cash flow and long-term positioning. Where tax considerations intersect with wider business strategy, they provide financial consulting input as well.

Key Highlights:

• London-based tax advisory firm
• Support for businesses and private individuals
• Tax return preparation and submission
• Ongoing tax planning advice
• Strategic financial consulting services

Services:

• Personal tax advisory
• Corporate tax advisory
• Tax return preparation
• Tax planning
• Financial consulting support
• HMRC compliance assistance

Contact Information:

• Website: www.lawrencegrant.co.uk
• E-mail: be-ambitious@lawrencegrant.co.uk
• Facebook: www.facebook.com/LawrenceGrantCA
• Twitter: x.com/LGaccountants
• LinkedIn: www.linkedin.com/company/lawrence-grant-chartered-accountants
• Address: 23, Berkeley Square, London, W1J 6HE
• Phone: +44 (0)20 8861 7575

Conclusion

Choosing a tax advisory firm in the UK usually comes down to more than reputation. Organisations tend to look at how clearly advisers explain complex issues, how they approach risk, and whether their experience matches the size and structure of the business. Practical understanding of governance and reporting obligations often carries more weight than broad claims about capability.

The process is not that different from selecting an internal audit provider. Decision-makers assess independence, technical depth and the ability to work steadily alongside existing finance teams. What matters most is consistency and sound judgement, especially where tax exposure or regulatory scrutiny is involved.

This guide is intended to bring some structure to that evaluation. By comparing firms on similar criteria – scope, expertise, communication and sector alignment – organisations can make a more measured decision and keep the review process efficient across future advisory engagements.