US–UK cross-border tax specialists
US & UK tax expertise for life across borders
You may live in one country, but your tax obligations can span two. We prepare US returns and UK Self Assessment together — one firm, both systems, one coherent strategy.
- US returns & UK Self Assessment under one roof
- Fixed fees agreed before work begins
- UK-based, serving clients worldwide
The cross-border problem
Two tax systems. One life. Plenty of ways for them to collide.
The US taxes by citizenship; the UK taxes by residence. If both claim you, every account, pension, property and pay rise exists in two rulebooks at once — and the rules were not written to fit together.
The US system
Citizenship-based
Worldwide income reported annually to the IRS wherever you live, plus FBAR and FATCA disclosure of non-US accounts — with sharp penalties for silence.
The UK system
Residence-based
The Statutory Residence Test decides who is taxable; Self Assessment, CGT reporting and the foreign income & gains regime decide on what.
Where we work
The overlap
Treaty positions, foreign tax credits, timing and elections — the coordination layer that decides whether two systems mean double tax or simply two filings.
Who we help
Built for people whose lives cross the Atlantic
Americans in the UK
US citizens living, working or retiring in Britain — with filing obligations in both countries.
Learn moreBrits with US ties
British citizens with US income, assets, a Green Card or an American spouse.
Learn moreDual citizens
US–UK dual nationals balancing two worldwide tax systems at once.
Learn moreAccidental Americans
Born in the US, lived in the UK ever since — and only now discovering US tax obligations.
Learn moreMoving US ↔ UK
Relocating in either direction. The biggest planning wins happen before you move.
Learn moreBehind on US taxes
Years of unfiled US returns or FBARs. There is a well-trodden, penalty-managed route back.
Learn moreUS tax
US tax, prepared from the UK side of the ocean
Federal returns, foreign account reporting and IRS compliance for Americans and Green Card holders abroad.
US tax returns for Americans abroad
Federal filing from outside the US — the Foreign Earned Income Exclusion, Foreign Tax Credit and expat deadlines.
Learn moreFBAR & FATCA reporting
Foreign account reporting: FinCEN 114 and Form 8938, thresholds and penalty exposure.
Learn moreStreamlined filing
The IRS route back to compliance for non-wilful late filers living abroad.
Learn moreForeign pensions & investments
How the IRS sees UK pensions, funds and ISAs — including PFIC exposure.
Learn moreUK tax
UK tax, with the American complications understood
Self Assessment and UK planning for clients whose affairs don’t stop at the border.
UK Self Assessment
Registration, preparation and filing — built around internationally connected clients.
Learn moreResidence & the FIG regime
The Statutory Residence Test, split-year treatment and the foreign income & gains regime.
Learn moreCapital gains & property
UK CGT, 60-day property reporting and landlord income — coordinated with the US side.
Learn moreUK pensions
Reliefs, allowances and drawdown — and what each choice means on a US return.
Learn moreUS–UK cross-border
The speciality: where the two systems meet
This is not a US service with a UK page bolted on. Cross-border coordination is the core of the practice — the treaty, the credits, the pensions, the investments, the moves.
The US–UK tax treaty
What the treaty actually changes — and where Form 8833 positions matter.
Double taxation
How foreign tax credits, timing and the treaty prevent paying twice.
Pensions & retirement
401(k)s, IRAs and Roths meeting SIPPs, workplace pensions and the State Pension.
ISAs & investments
Why ISAs aren’t tax-free for US persons, PFIC rules, and what you can hold.
Property across borders
Buying, letting and selling in either country — including currency-driven gains.
Moving between the US & UK
Pre-move planning, split-year and dual-status returns in both directions.
Life events
Big moments have tax consequences in two countries
The best time to take cross-border advice is before the event, not after the filing deadline.
Why a specialist
A US accountant and a UK accountant are not the same as one cross-border firm
Most expensive cross-border mistakes happen in the gap between two advisers who each see half the picture.
Credits land in the right country
Foreign tax credit planning only works when whoever claims it can see both returns and both payment dates.
Elections are made consistently
Treaty positions, FEIE choices and pension elections interact across years and across both filings — one wrong tick box can cost real money.
Traps get spotted before they spring
PFICs inside ISAs, US LLC income taxed twice in the UK, currency gains on a mortgage redemption — cross-border classics a single-country adviser rarely sees coming.
One conversation, not two invoices
You explain your situation once, and the answers already account for the other side.
How it works
A clear process, a fixed fee, no surprises
- 01
Tell us about your situation
A short enquiry — where you live, your citizenship, and what’s worrying you. No documents needed yet.
- 02
Consultation
We map your position across both systems: what must be filed, what can be planned, and what it will cost.
- 03
Fixed-fee engagement
You approve a clear scope and fee before any work begins. No surprises later.
- 04
Preparation & filing
US and UK returns prepared in coordination, reviewed with you, and filed on time.
Resources
Guides worth reading before you file
Compliance · 4 min read
Behind on US Taxes: What Does the Streamlined Path Back Look Like?
A walk through the Streamlined Foreign Offshore Procedures from the taxpayer's side: who qualifies, the three years of returns and six years of FBARs, the non-wilful certification, what it costs, and why most people owe less than they fear.
Learn moreUS Expat Tax · 4 min read
Do I Still Have to File US Taxes if I Live in the UK?
Yes, usually — the US taxes by citizenship, not residence. Who has to file from the UK, what the deadlines really are, why most expats owe little or nothing, and what to do if you have missed years.
Learn moreUS Expat Tax · 4 min read
FEIE or Foreign Tax Credit: Which Works Better in the UK?
Americans in the UK can shield income with the foreign earned income exclusion or the foreign tax credit — but not always both, and the choice is sticky. Why the credit often suits high-tax Britain, what revoking the FEIE commits you to, and why there is no universal answer.
Learn moreCommon questions
Straight answers to the questions everyone asks first
Do I still have to file US taxes if I live in the UK?
Almost certainly yes, if you're a US citizen or Green Card holder. The US taxes its citizens on worldwide income wherever they live, so an annual federal return is usually required above modest income thresholds — on top of any UK filing. Most people owe little or no US tax once exclusions, credits and the treaty are applied, but the returns still have to be filed.
Will I pay tax twice on the same income?
Usually not, if things are handled properly. Foreign tax credits, the US–UK treaty and careful timing mean most income is only effectively taxed once. Double taxation tends to arise from mismatches — the wrong elections, mistimed payments, or investments one country penalises — which is exactly what coordinated preparation avoids.
Is my ISA really taxable in the US?
Yes. The UK's tax-free wrapper means nothing to the IRS: interest, dividends and gains inside an ISA are taxable on a US return, and holding funds inside a stocks & shares ISA can trigger the punitive PFIC regime. If you're a US person with an ISA, it's worth reviewing before the next filing season.
I'm years behind on US tax filings. How bad is it?
Usually far less bad than people fear. If your failure to file was non-wilful and you live abroad, the IRS Streamlined Foreign Offshore Procedures generally allow you to catch up with three years of returns and six years of FBARs, with the usual penalties waived. The important thing is to come forward before the IRS contacts you.
Can one firm really handle both my US and UK returns?
That's the point of this practice. Preparing both returns together means the same people see both sides — so credits land in the right country, elections are consistent, and nothing falls into the gap between a US accountant and a UK accountant who never speak.
What does it cost?
Fees are fixed and agreed before any work begins, based on the complexity of your returns. A consultation is the quickest way to get a firm quote for your situation.
More questions answered in the full FAQ.
Talk to a US–UK tax specialist
Tell us about your situation and we’ll explain your position across both systems — what you need to file, what you can plan around, and what it will cost.
Or call +44 20 8064 3580 — we’ll tell you honestly whether you need help.