Do US citizens living in the UK have to file a US tax return?

Yes. US citizens and green card holders must file a US federal tax return every year regardless of where they live, reporting worldwide income. Living in the UK does not remove this obligation — but reliefs like the Foreign Earned Income Exclusion and Foreign Tax Credit usually prevent you from being taxed twice.

Can I be taxed twice on the same income in the US and the UK?

Generally no. The US–UK tax treaty, combined with the Foreign Tax Credit and Foreign Earned Income Exclusion, is designed to prevent double taxation. Most clients legally owe tax in only one jurisdiction on a given income source when their filings are structured correctly.

What is the IRS Streamlined Filing Procedure?

The Streamlined Filing Compliance Procedure lets US taxpayers who were unaware of their obligations catch up penalty-free. It typically requires three years of tax returns and six years of FBARs, plus a statement certifying the failure to file was non-wilful.

Do I need to file an FBAR if I live in the UK?

If you are a US person and the combined balance of your non-US financial accounts exceeds $10,000 at any point in the year, you must file an FBAR (FinCEN Form 114). This includes UK current accounts, ISAs, pensions and joint accounts.

Can one firm really handle both my US and UK taxes?

Yes — that is exactly what we specialise in. Rather than coordinating a UK accountant and a US preparer who never speak to each other, our team handles both sides together, so your treaty positions, credits and filings line up across jurisdictions.

Resources · Calculators

Cross-border tax calculators & tools

Our free tools help Americans in the UK, Brits in the US and dual citizens understand their cross-border tax position — from whether you'll be taxed twice, to whether you need to file an FBAR, to which US relief leaves you better off. Each gives an indicative estimate, then connects you to a specialist.

By Sam H., Founder & Lead Advisor

Reviewed by Katie M. · 2026-01-22

US/UK Double-Tax Estimator

See whether your income is at risk of being taxed twice — and roughly how much relief the Foreign Tax Credit and treaty could provide.

Open calculator

FBAR Requirement Checker

Answer three questions to find out whether you need to file an FBAR (FinCEN 114) this year.

Open calculator

Streamlined Filing Eligibility

Check whether you may qualify for the IRS Streamlined programme to catch up penalty-free.

Open calculator

Coming soon

FEIE vs Foreign Tax Credit

See which relief is likely to leave you better off as an American in the UK.

UK Statutory Residence Test

Work through the SRT to estimate your UK tax-residence status for the year.

Open calculator

Coming soon

Self Assessment Deadline & Penalty

Find your filing deadlines and estimate HMRC late penalties.

US Expat Tax Deadlines

Your US filing dates as an American abroad, including the automatic extension.

Open calculator

Coming soon

Non-Dom Remittance Basis Estimator

Explore whether the remittance basis could suit your UK position.

Coming soon

UK Corporation Tax Estimator

Estimate your UK company’s Corporation Tax at current rates.

Coming soon

US vs UK Take-Home Pay

Compare net pay across the two systems when considering a move.

Frequently asked questions

Yes. Every tool here is free and gives an indicative estimate to help you understand your cross-border position. They are educational, not formal advice — for a precise answer we offer a free consultation.

They use current headline rules and rates to give a directional figure. Real outcomes depend on the full detail of your situation, which is why each tool ends with the option to speak to a specialist.

Want a precise answer for your situation?

The tools give you a direction. A free consultation gives you certainty.

Book your free consultation