Expat Tax Companies in the UK: A Guide to Specialists
AC
Acumon Chartered Accountants·16 min read
Moving between countries often brings more than a change of address. Tax obligations can quickly become more complex, particularly where income, assets or residency span more than one jurisdiction. Understanding how UK tax rules interact with overseas requirements is an important part of avoiding unnecessary liabilities and remaining compliant.
The UK is home to a broad range of firms providing expat tax services, from international accountancy networks to specialist tax advisory practices. Their expertise varies depending on the needs of each client, whether that involves establishing tax residency, managing overseas income, planning a return to the UK, or navigating reporting obligations across multiple countries.
This guide highlights a selection of firms offering expat tax services in the UK. Rather than ranking providers, it aims to provide practical context around the types of services they offer, the clients they typically support, and the areas in which they have developed particular expertise. Whether you're relocating to the UK, leaving the country, or managing international tax affairs as an expatriate, understanding the different approaches available can help you identify the right advisor for your circumstances.
Acumon
Acumon is a UK firm of chartered accountants and advisors providing expat tax services to individuals and businesses across the UK.
The firm works with clients ranging from private individuals and business owners through to employers and international organisations. Expat tax services are designed to support UK tax compliance, residency matters and international tax planning for individuals working across multiple jurisdictions.
Acumon provides expat tax services including UK residency advice, split-year treatment, double tax relief, PAYE and NT code support, social security coordination and tax compliance. Services are delivered through a structured approach designed to support accurate tax reporting and ongoing compliance with UK tax legislation.
Acumon holds a Public Interest Entity (PIE) audit licence, enabling the firm to support organisations subject to enhanced regulatory oversight in the United Kingdom. In addition to its UK statutory audit registration, the firm also maintains audit licences in the Cayman Islands, British Virgin Islands (BVI), Jersey and Isle of Man, supporting clients with international structures and cross-border reporting requirements.
Individuals working internationally often have tax obligations in more than one jurisdiction. Reviewing UK residency, double tax relief and reporting requirements can help support effective tax planning while maintaining compliance with UK tax legislation.
Acumon works with private clients, employers and finance teams to support tax compliance while helping individuals and organisations manage international tax obligations.
Expat Tax Capabilities
Acumon provides expat tax services across a wide range of individuals and organisations.
These include:
internationally mobile individuals and business owners
UK employers and international organisations
employees working across multiple jurisdictions
individuals relocating to or from the UK
clients with UK residency considerations
clients with international tax obligations
Expat tax engagements are typically led by experienced professionals with direct involvement throughout the engagement.
Regulatory Licences and Registrations
Acumon holds several audit registrations that enable it to support organisations operating across multiple jurisdictions.
These include:
UK statutory audit registration
Public Interest Entity (PIE) audit licence
Jersey audit licence
Isle of Man audit licence
Cayman Islands audit licence
British Virgin Islands audit licence
These registrations allow the firm to support organisations operating across both the UK and key international financial centres.
Core Services
In addition to expat tax services, Acumon provides a range of services that support tax planning and financial governance.
These include:
expat tax services
UK residency advice
double tax relief and tax compliance
statutory external audit
group and subsidiary audits
Public Interest Entity (PIE) audits
charity and not-for-profit audit
internal audit and governance reviews
risk management and compliance support
Expat tax work is often delivered alongside discussions regarding UK residency, international tax planning and tax compliance.
Many individuals and employers seek professional advice when managing international tax obligations, relocating employees or reviewing UK tax residency.
Acumon works with clients that are:
relocating internationally
reviewing UK tax residency
managing international tax obligations
maintaining tax compliance
planning for the future
Early engagement can help ensure that international tax matters remain aligned with UK tax legislation and ongoing reporting requirements.
Address: 1-2 Craven Road, Ealing, London, W5 2UA, UK
Phone: 020 8567 3451
BDH Tax
BDH Tax focuses on tax matters for people who move between the UK and Australia, helping expatriates understand how their tax responsibilities change when living or working overseas. Their work covers common issues such as UK tax residency, annual tax returns, and the treatment of income that continues to come from the UK after leaving the country. They also consider how international tax treaties may affect an individual's position and help reduce the risk of income being taxed in more than one country.
Alongside tax return preparation, they deal with planning before and after a move, giving clients a clearer picture of their reporting obligations and available tax reliefs. Their experience includes working with individuals in different stages of relocation, whether they are leaving the UK, returning, or managing financial ties with both countries. They also communicate with overseas tax advisers when cross-border matters require coordination.
Key Highlights:
Focus on UK and Australian expatriate tax matters
Assistance with UK tax residency questions
Support with cross-border tax planning
Preparation and electronic submission of UK tax returns
Guidance on double taxation and tax treaties
Services for individuals moving to or from the UK and Australia
Knowles Warwick advises individuals who are relocating abroad or managing tax obligations across more than one country. Their expat tax services cover both compliance and planning, helping clients understand how changes in residency, employment, and social security can affect their UK tax position. They also assist with tax enquiries and support people whose circumstances involve international financial arrangements.
Their approach extends beyond annual tax filing by looking at broader financial considerations linked to living overseas. This includes retirement planning, international accounting support, and advice for businesses involved in overseas trade. Their team works with individuals as well as business owners whose activities create cross-border tax responsibilities.
Key Highlights:
Support for UK expatriates and internationally mobile individuals
Advice on international tax and social security matters
Assistance with tax enquiries and investigations
Tax planning linked to overseas moves
Support for international business activities
Guidance covering personal and business tax matters
Address: Charlotte House, 500 Charlotte Road, Sheffield, S2 4ER
Phone: 0114 274 7576
Trewtax
Trewtax concentrates on UK tax matters for British expatriates living and working overseas. Their work covers the tax questions that often arise when someone leaves the UK, earns income abroad, or continues to receive income from UK sources. They help clients understand their filing obligations, tax residency position, and the rules that apply to non-residents with UK assets or property.
Many of their clients seek support before returning to the UK or while managing tax responsibilities from another country. They assist with planning ahead for major life changes, including repatriation and property sales, while making sure UK reporting requirements are handled correctly. Their services are available to expatriates in a wide range of countries, with an emphasis on practical tax compliance and long-term planning.
Key Highlights:
Focus on UK tax matters for expatriates
Assistance for clients living in multiple countries
Guidance on UK tax residency and non-resident rules
Titan Wealth International covers a broad range of cross-border tax matters for UK expatriates and internationally mobile individuals. Their tax advisers help clients understand how UK tax rules interact with the regulations of other countries, especially when residency, overseas income, pensions, or inheritance planning are involved. They explain the tax consequences of different financial decisions and help clients stay compliant with reporting requirements across jurisdictions.
Their tax services form part of a wider approach that also considers long-term financial planning. Guidance is available for people returning to the UK, retiring abroad, managing international investments, or dealing with inheritance tax across multiple countries. They also advise on tax reliefs, double taxation agreements, and residency rules that may affect an individual's overall tax position.
Key Highlights:
Focus on UK and international tax planning
Support for expatriates with cross-border finances
Address: 3 Temple Quay, Temple Back East, Bristol, BS1 6DZ
Phone: +44 (0)800 048 0150
Clark Jamison
Clark Jamison advises individuals, families, and business owners whose tax affairs involve more than one country. Their work focuses on helping expatriates understand UK tax obligations while managing overseas income, international assets, or business interests abroad. They assist with residency questions, double taxation issues, and reporting requirements that can arise when moving between jurisdictions.
Their experience covers a wide range of international situations, including remote workers, entrepreneurs, non-resident landlords, trustees, and people planning to leave or return to the UK. Along with preparing tax returns, they help clients organise their affairs before major changes, deal with HMRC enquiries, and review tax positions that involve both UK and overseas rules.
Key Highlights:
Focus on international and expatriate taxation
Support for individuals and businesses with cross-border tax matters
Address: Arena, Holyrood Close, Poole, Dorset, BH17 7FJ
Phone: +44 (0) 1202 606080
Expat Taxes
Expat Taxes connect UK expatriates with tax professionals who specialise in cross-border taxation and international tax planning. Their focus is on helping people understand UK tax obligations while living abroad, whether they need advice on residency, double taxation, pensions, or ongoing reporting requirements. Their consultation process is designed to match clients with advisers whose experience fits their individual tax situation.
Following the initial consultation, clients can continue working with the same tax specialist for additional support where needed. Their network covers a range of international tax matters, allowing individuals to receive guidance on both planning and compliance when dealing with financial ties across different countries.
Key Highlights:
Network of UK and cross-border tax specialists
Focus on expatriate tax planning and compliance
Online tax consultations
Support with UK and international tax matters
Guidance on residency and double taxation
Continued assistance after the initial consultation
Alliotts advise UK expatriates whose tax position changes after moving overseas or returning to the UK. They focus on helping individuals understand how residency status affects UK taxation, including the treatment of overseas income, investments, property, and inheritance tax. Their guidance covers both the planning stage before relocation and the ongoing tax responsibilities that follow.
Once a person's residency status has been established, attention shifts to practical matters such as tax returns, reporting obligations, and financial planning across different countries. Their experience includes reviewing contracts, considering capital gains and inheritance tax issues, and helping clients meet HMRC requirements while managing tax matters linked to international moves.
Key Highlights:
Focus on UK expatriate taxation
Guidance on the Statutory Residence Test
Support before leaving and returning to the UK
Advice on cross-border tax planning
Assistance with UK tax compliance
Experience with residency and inheritance tax matters
Thorne Expatriate Tax Services Limited specialise in tax services for people whose financial affairs extend across both the UK and the United States. Their client base includes British nationals living overseas, US citizens abroad, foreign nationals moving to the US or the UK, and companies with internationally assigned employees. The main focus is on helping individuals deal with tax filing requirements that arise when income, employment, or residency spans more than one country.
Alongside tax return preparation, they advise clients on cross-border tax matters that often require an understanding of both UK and US rules. Their support covers ongoing compliance as well as tax planning, allowing clients to deal with changing circumstances such as relocation, overseas assignments, or non-domiciled status in the UK. They maintain a personal approach by working directly with clients throughout the process.
Key Highlights:
Focus on UK and US expatriate taxation
Support for internationally mobile individuals
Assistance for British and American expatriates
Advice for non-domiciled individuals in the UK
Experience with cross-border tax compliance
Services for employers with overseas assignments
Services:
UK tax return preparation
US tax return preparation
Cross-border tax advice
Expat tax planning
UK expat payroll support
Tax advisory services
Compliance with UK and US tax obligations
Tax support for international employee assignments
Progeny helps expatriates understand how UK tax rules apply when they live, work, or hold assets outside the country. Their advice centres on residence and domicile, explaining how these factors influence liability for income tax, capital gains tax, and inheritance tax. They also consider situations where an individual may have tax obligations in more than one country and how double taxation agreements affect the outcome.
Different aspects of an expatriate's financial position are reviewed together, including overseas income, UK property, investments, and future plans to return to the UK. Their tax advisers assist with decisions linked to residency, capital gains, and available tax reliefs, while taking account of changes in UK tax legislation that may affect internationally mobile individuals.
Thomas Barrie & Co advise expatriates whose tax affairs involve both the UK and another country. Their services are aimed at individuals who are leaving the UK, moving back, or continuing to receive income and hold assets in the UK while living overseas. They help clients understand how tax residency affects their reporting obligations and explain when double taxation relief may be available.
Questions around residency, foreign income, and UK property often require careful planning, particularly when tax rules differ between countries. Their advisers assess individual circumstances before recommending suitable tax approaches, while helping clients meet UK filing requirements and make use of available tax reliefs where appropriate.
Expat Tax Advice focuses on individuals and families who are moving to or from the UK and need to understand how their tax position will change. Much of their work involves reviewing residency status before a relocation takes place, allowing clients to identify potential tax issues before important decisions are made. They also explain how UK tax rules apply to overseas income, property, and capital gains after a move.
Every relocation brings different tax questions depending on the destination country, the timing of the move, and the individual's financial circumstances. Their guidance covers HMRC reporting obligations, Split Year Treatment, double taxation agreements, and tax planning for people returning to the UK, digital nomads, seafarers, and overseas property owners.
Key Highlights:
Focus on tax planning before international relocation
Jaffe & Co specialise in UK and US tax matters for American expatriates living in the UK and British clients with US tax obligations. Their services are centred on helping individuals meet the filing requirements of both tax systems while explaining how the rules interact in cross-border situations. They deal with issues that commonly affect expatriates, including reporting overseas income, international tax compliance, and ongoing tax responsibilities in two countries.
With many years of experience in expatriate taxation, they assist clients whose financial affairs involve both HMRC and the IRS. Their guidance extends beyond tax return preparation to include advisory work on international tax matters, helping clients understand filing requirements such as FBAR and FATCA alongside UK tax obligations.
Key Highlights:
Focus on UK and US expatriate taxation
Assistance with HMRC and IRS tax matters
Guidance on international tax compliance
Support for American expatriates in the UK
Advice on cross-border tax reporting
Experience with US reporting requirements
Services:
UK tax return preparation
US tax return preparation
Cross-border tax advice
FBAR reporting guidance
FATCA compliance support
International tax planning
HMRC and IRS filing assistance
Expat tax advisory services
Contact Information
Website: www.jaffeandco.com
Address: ORT House, 147 Arlington Road, London, NW1 7ET, United Kingdom
Phone: +44 (0)20 8346 5237
CST Tax
CST Tax advises British expatriates, internationally mobile individuals, and businesses with tax responsibilities across different countries. Their services cover people moving overseas, returning to the UK, managing overseas assets, or receiving income from UK sources. They also assist businesses expanding internationally by addressing tax and compliance issues linked to cross-border operations.
International tax planning forms part of a wider service that includes personal taxation, property tax, and business advice. Their team works with clients whose financial affairs span multiple jurisdictions, helping them understand residency, reporting obligations, ownership structures, and the tax treatment of overseas investments. Support is also available through their international offices for clients with connections to countries such as Australia, Singapore, and the United States.
Key Highlights:
Focus on international tax for individuals and businesses
Support for British expatriates and UK newcomers
Advice on overseas assets and UK property
Assistance with cross-border tax planning
International presence across several jurisdictions
Choosing an expat tax adviser is rarely about finding a firm that offers the longest list of services. For most people, the better fit depends on their own circumstances, whether they are moving abroad, returning to the UK, managing property or investments, or dealing with tax obligations in more than one country. Some firms focus on UK tax compliance, while others have broader experience with cross-border planning or UK and US tax matters.
Comparing providers based on their areas of expertise, the types of clients they work with, and the services they offer can make the decision much easier. This guide brings together a range of UK expat tax firms to give an overview of the support available, helping individuals identify the providers that best match their tax situation before making an informed choice.
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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