US Tax Preparation for Americans Living in London
London is home to one of the largest American expat communities in the world, drawn by finance, tech, creative industries, and the shared language. But the UK's worldwide income taxation and complex rules for non-doms create unique US filing challenges. FileAbroad helps Americans in London navigate FEIE, FBAR, and the UK-specific questions that complicate cross-border filing.
US Filing Implications for Americans in London
The UK taxes worldwide income for tax residents. UK tax residency is determined by the statutory residence test, which is complex and considers days spent in the UK, work ties, accommodation ties, family ties, and other factors. The US-UK tax treaty applies with the standard saving clause.
UK tax rates reach up to 45% plus National Insurance contributions (employee: 8% on earnings between ÂŁ12,570 and ÂŁ50,270, 2% above). At these rates, FTC is almost always more valuable than FEIE for Americans in London.
The remittance basis allowed non-domiciled UK residents to pay UK tax only on UK-source and remitted foreign income. This regime is being phased out from April 2025 under new rules, replaced by a 4-year foreign income and gains regime for new arrivals. The transition creates significant complexity for Americans who have been in London for several years.
Self-employment in the UK (sole trader, partnership, limited company) has different US tax implications. National Insurance contributions and US self-employment tax interact through the US-UK totalization agreement.
UK pensions (workplace pensions, SIPPs) have complex US tax treatment. The US-UK tax treaty provides some relief, but Form 8938 reporting is often required.
Local Context That Affects Your Return
UK banking in London centers on HSBC, Barclays, Lloyds, NatWest, Monzo, and Revolut. All are reportable on FBAR.
London has among the highest cost of living in the world, particularly for housing. Rents in central London (Zones 1-2) are extremely high. This maximizes your FEIE housing exclusion but also increases overall expenses.
The National Insurance number is required for employment and tax in the UK.
London's rental market is competitive. Deposit protection schemes, guarantor requirements, and high upfront costs (often 6 weeks' rent deposit plus first month's rent) are standard.
UK social charges (National Insurance) count toward FTC. These are separate from income tax and can be significant.
Property ownership in London triggers US reporting requirements. Directly held foreign real estate is not reported on FBAR or Form 8938. Foreign accounts and interests in foreign entities can be reportable when applicable thresholds are met; rental income and gains may still require U.S. tax reporting.
FBAR & Foreign Account Considerations
UK bank accounts, investment accounts (ISAs, GIAs), and pension accounts (SIPPs, workplace pensions) are reportable on FBAR if the aggregate value across all foreign accounts exceeds $10,000.
Common London banks include HSBC, Barclays, Lloyds, NatWest, Monzo, and Revolut. ISAs (Individual Savings Accounts) are reportable on FBAR even though they are tax-free in the UK — the US does not recognize their tax-free status.
UK pension accounts (SIPPs) are reportable on FBAR. These accounts often have complex underlying investments and may require Form 8938 in addition to FBAR.
The UK uses the pound sterling. All account balances must be converted to US dollars using the Treasury Department's year-end exchange rate.
FEIE vs Foreign Tax Credit in London
FTC is almost always more valuable than FEIE for Americans in London due to high UK tax rates (up to 45% plus National Insurance).
FEIE may be better for Americans in their first year abroad, those with income below the FEIE limit and significant housing costs, or those who qualify for the remittance basis (though this is being phased out).
The FEIE housing exclusion for London is calculated based on actual housing costs, subject to IRS limits for the UK. London's very high rents result in a substantial housing exclusion.
State Tax Connections
California, New York, and other states with aggressive residency rules can follow you to London. California does not conform to the federal FEIE.
When to Get Professional Help
You should consider professional help if you have unfiled prior years, foreign accounts exceeding $10,000, self-employment income, property ownership in the UK, remittance basis questions, or complex income situations.
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FileAbroad explains U.S. federal tax and U.S. international information-reporting consequences of documented foreign facts. It does not provide foreign-country legal or tax representation, valuation opinions, banking or remittance advice, or advice on what a foreign authority will accept.
Scope statement reviewed 2026-08-30 · FileAbroad product/content owner