Accountants & tax preparation for expats in the UK

Filing taxes as an expat means navigating two systems at once. Whether you need help with HMRC Self Assessment, US expat returns, FBAR filings or day-to-day UK accounting, find specialist providers here — reviewed for people moving to or living in the UK.

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Vetted providers

Accountants & tax services for expats

Every provider below has been reviewed by our editorial team before listing.

5 providers listed

US Expat Tax
MyExpatTaxes

Specialist US expat tax software backed by IRS Enrolled Agents and CPAs. Covers Self Assessment, FBAR, FATCA and international returns across 165+ countries — with flat-rate pricing and instant IRS e-filing.

IRS Enrolled Agents FBAR & FATCA 165+ Countries Flat-Rate Pricing
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US Tax Filing
Tax1099

IRS-authorised e-filing platform for 1099s, W-2s and other US information returns. Integrates with QuickBooks, Xero and FreshBooks — ideal for US expats managing American reporting obligations from the UK.

IRS Authorised 1099 & W-2 Filing QuickBooks / Xero US Expats
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US Tax Filing
TurboTax

Intuit's trusted tax preparation platform for individuals, families and the self-employed. Step-by-step guidance on deductions, credits, investment income and self-employment — file independently or with professional help.

Step-by-Step Guidance Self-Employed Investment Income Professional Help Option
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Accounting Software
Sage

Global accounting software trusted by millions of small businesses. Covers bookkeeping, invoicing, payroll and HMRC-compatible tax submissions — including Making Tax Digital (MTD) — in one scalable platform.

MTD Compatible Payroll Invoicing Small Business
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CPA Matching
Taxfyle

US tax platform connecting expats with licensed CPAs and IRS Enrolled Agents. Covers FBAR, FATCA, foreign income and multi-country compliance — with transparent pricing and secure document management throughout.

Licensed CPAs FBAR & FATCA Foreign Income Transparent Pricing
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Tax as an expat in the UK: what you need to know

Moving to the UK doesn't just change where you live — it changes your tax position. The UK operates a residence-based tax system, meaning that once you become UK tax resident (which typically happens after 183 days in a tax year, though the Statutory Residence Test has earlier trigger points), you become liable to UK tax on your worldwide income and gains. For US citizens, the situation is more complex: the US taxes on the basis of citizenship, so Americans living in the UK must file in both countries every year.

For most PAYE employees, UK taxes are handled automatically through payroll and no Self Assessment return is required. However, if you have foreign income, rental income, investment gains, self-employment income, or certain other sources, HMRC requires you to register for and file a Self Assessment return by 31 January each year. Penalties for late filing start at £100 and increase sharply — it is worth registering as soon as you know a return will be required rather than waiting until January.

US expats face an additional layer of compliance. The Foreign Account Tax Compliance Act (FATCA) and the Foreign Bank Account Report (FBAR) both require disclosure of overseas financial accounts above certain thresholds. Failure to file carries significant penalties even if no tax is owed. Specialist US expat tax services — staffed by IRS Enrolled Agents rather than generalist accountants — are strongly recommended for Americans living abroad.

For self-employed expats and small business owners, accounting software with Making Tax Digital (MTD) compatibility is increasingly important. HMRC's MTD initiative is expanding to cover more taxpayers, and from April 2026 the majority of self-employed individuals and landlords with income above £50,000 will be required to submit quarterly updates digitally rather than an annual return.

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Common questions

Accountants & Tax Preparation — FAQs

Not automatically. Most employees taxed via PAYE do not need to file a return. However, if you have foreign income, self-employment income, rental income, investment gains, or income over £100,000, you must register for and file a Self Assessment return with HMRC. The deadline for online filing is 31 January following the end of the tax year. Late filing carries an immediate £100 penalty, rising significantly over time.
Yes. The US taxes on the basis of citizenship, not residence — so all US citizens and green card holders must file a US federal tax return each year regardless of where they live. Most US expats in the UK also need to file an FBAR (FinCEN 114) if their UK bank accounts exceed $10,000 at any point during the year, and may have FATCA reporting obligations. A specialist US expat tax service is strongly recommended to avoid penalties.
FBAR stands for Foreign Bank Account Report (formally FinCEN 114). It must be filed by any US person — citizen, green card holder, or resident alien — whose foreign financial accounts collectively exceeded $10,000 at any point during the calendar year. This includes UK current accounts, savings accounts, ISAs and investment accounts. FBAR is filed separately from your tax return, directly with the Financial Crimes Enforcement Network (FinCEN), and the deadline is 15 April with an automatic extension to 15 October.
Making Tax Digital is HMRC's programme to require businesses and self-employed individuals to keep digital records and submit tax information using compatible software. MTD for VAT already applies to all VAT-registered businesses. MTD for Income Tax Self Assessment (MTD ITSA) is being phased in from April 2026, starting with self-employed individuals and landlords earning over £50,000. If you fall into this category, you will need MTD-compatible accounting software such as Sage, QuickBooks or Xero.
If your tax position is straightforward — a single UK employer, no foreign income, no self-employment — self-filing via HMRC's online portal is manageable. Tax software such as TurboTax is a good middle ground for US expats who want guidance without full accountant fees. If you have foreign income, overseas assets, self-employment income in multiple countries, or any cross-border complexity, a specialist expat accountant or IRS Enrolled Agent is worth the cost — errors and missed filings carry penalties that far exceed professional fees.
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