US-UK Dual Tax Filing for Americans Living in the UK
Americans living in the United Kingdom face one of the world's most complex dual-tax situations. Both the US and UK assert broad taxing rights over their residents and citizens respectively, but a comprehensive tax treaty and the Foreign Tax Credit system prevent true double taxation in most cases. The complexity lies in the detail: UK ISAs are not tax-advantaged under US law, UK pension contributions have different treatment on each side, and certain UK investment vehicles (such as foreign-domiciled ETFs) may trigger PFIC reporting. We provide end-to-end US and UK compliance in one service.
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What this filing may involve
Every situation is different. The forms below commonly apply — your specific filing may vary.
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- ✓Everything in Premier
- ✓Foreign Earned Income Exclusion (Form 2555)
- ✓Foreign Tax Credit (Form 1116)
- ✓FBAR filing (FinCEN 114) included
- ✓Everything in Expat
- ✓Schedules D & E for investments and rentals
- ✓Foreign asset reporting (Form 8938)
- ✓FBAR filing (FinCEN 114) included
- ✓Self Assessment tax return
- ✓Employment and basic self-employment income
- ✓Basic reliefs and allowances
Frequently asked questions about US-UK Dual Tax Filing for Americans Living in the UK
Do I pay tax in both the US and the UK?
You have filing obligations in both countries. However, the US-UK tax treaty and the Foreign Tax Credit work together so that you generally don't pay the same tax twice. UK income tax paid offsets US tax liability on the same income. The actual tax owed to the US is typically zero or small for most Americans in the UK.
Is my UK ISA taxable in the US?
Yes. UK ISAs are not recognised as tax-advantaged by the IRS. Interest, dividends, and capital gains inside your ISA are fully taxable in the US each year. Additionally, any non-UK ETFs or foreign mutual funds held inside your ISA are likely PFICs, triggering Form 8621 obligations.
Can I contribute to my UK employer pension and deduct it in the US?
Not directly as a deduction. Under the US-UK treaty, UK employer pension contributions are generally not treated as current taxable income in the US — they grow as a treaty-based deferral. However, you cannot additionally deduct them. This position requires Form 8833 disclosure on your US return.
I'm a US-UK dual national — which country's rules take priority?
Both countries assert tax residency rights based on their own rules. As a US citizen, you always have a US filing obligation. As a UK resident, you generally have a UK filing obligation. The treaty and Foreign Tax Credit determine who gets the actual tax revenue — usually the UK on UK-source income, with the US making up any small difference.
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