Dual US & UK filing, under the US–UK tax treaty
File in both the US and the UK and the same income can be taxed twice. The US–UK double tax treaty and foreign tax credit relief are what stop that — but only when both returns are prepared by one team to agree with each other.
How the treaty stops double tax
The tools we use so the same income isn't taxed in both countries.
- FTC reliefTax paid in one country credited against the other on the same income.
- TreatyThe US–UK treaty decides which country taxes each type of income first.
- Form 8833Discloses a treaty-based position taken on your US return.
- Tie-breakerResidence tie-breaker rules for people resident in both countries.
- TimingThe US calendar year and UK 6 April year reconciled so credits line up.
What clients say about filing on both sides
I moved to Austin but kept a rental flat in Reading and a UK workplace pension. Taxule prepared my US return and my UK Self Assessment together, credited the UK tax on the rent against my US bill and applied the treaty to the pension correctly. Nothing was taxed twice.
The US tax year ends in December and the UK one on 5 April, and my previous advisers never made the credits line up. One team now builds both returns from the same numbers, so the UK tax I pay is credited in the right year and in the right direction.
For one year I counted as resident in both countries. The team worked through the treaty tie breaker rules with me, disclosed the position on Form 8833 and made sure my US and UK returns told exactly the same story.
Who this service is for
Americans living in the UK
US citizens here still owe a US return every year. Foreign income, accounts and credits are handled so the same income isn't taxed twice.
Brits living in the US
UK income, property or pensions don't stop mattering once you're filing in America. We keep the UK side reported correctly, with the treaty applied where it helps.
US-UK dual nationals
Holding both passports usually means both countries want a return. We coordinate the two so credits go the right way and positions don't contradict.
US-UK cross-border taxpayers
Income, investments or gains that touch both countries at once — exactly the mismatch a treaty exists to solve, applied consistently.
Behind on either side? See Streamlined catch-up filing first.
Where the treaty points each type of income
The US–UK treaty assigns the primary taxing right for different income types. Pick one to see how it usually falls — an illustration, not advice.
Primary taxing right, by income type
Who taxes it first, and who gives credit — the general treaty pattern for a US citizen living in the UK.
What's included in coordinated filing
You get a written scope first, listing exactly what we prepare on each side and what it costs.
US & UK returns together
One team prepares your Form 1040 and your UK Self Assessment side by side, so the two never contradict each other.
Foreign tax credit relief
Relief applied on the correct side, so tax paid in one country isn't wasted or double-counted in the other.
Treaty positions
US–UK double tax treaty positions taken where they help, applied the same way on both returns.
Residence & tie-breaker
Residence and treaty tie-breaker questions resolved, and disclosed on Form 8833 where needed.
Timing mismatches
The US calendar year and the UK 6 April tax year reconciled, so income and credits line up across the gap.
Pensions, dividends & gains
Each income type treated correctly on both sides, under the treaty rules that apply to it.
How dual filing actually works
The mechanics that keep the two returns consistent and stop double taxation.
Two systems, one set of numbers
When separate advisers prepare each side in isolation, credits get missed and positions clash. One team keeps the numbers consistent.
Credit in the right direction
Getting the direction of foreign tax credit relief wrong is a common, costly error. We claim it on the correct return for each income type.
The saving clause
The US treaty saving clause lets the US still tax its citizens on most income — so the treaty is applied carefully, not assumed.
Form 8833 disclosure
Where you take a treaty-based position on the US return, it usually has to be disclosed on Form 8833. We prepare it so it holds up.
Mismatched tax years
The US uses the calendar year; the UK runs 6 April to 5 April. Matching income and credits across that gap is part of the job.
Pensions under the treaty
The treaty can protect the growth in many UK pensions from US tax until you draw on it — how it applies depends on the scheme.
Why Taxule for coordinated filing
Because the value is in the coordination — one team, both returns, no gaps between them.
One team, both sides
Your US and UK returns are prepared together, so credits and treaty positions match before anything is filed.
Dual-qualified
US CPA and UK CTA under one roof — almost no small firm can credibly prepare both halves.
Fixed fees, agreed up front
You know the cost of coordinating both sides before we start.
How coordinated filing works with us
- 1
Map both sides
We line up your income against both systems and find where they would otherwise disagree.
- 2
Set the treaty & credit position
We decide where credits belong and which treaty positions to take, documented so they hold up.
- 3
File in step
Both returns go out consistent with each other, not stitched together after the fact.
Dual filing and treaty questions
Straight answers to what cross-border filers ask most.
How does the US–UK tax treaty stop double taxation?
The US–UK double tax treaty and foreign tax credit relief let tax paid in one country offset what's owed in the other on the same income. They prevent double taxation — but only when claimed correctly on both returns, which is exactly what coordinated filing does.
What is foreign tax credit relief and how do I claim it?
It credits tax you've already paid in one country against your liability in the other, so the same income isn't taxed twice. We claim it in the right direction on the correct return — getting the direction wrong is a common, costly error.
Do I need to file Form 8833?
If you take a treaty-based position on your US return, it usually has to be disclosed on Form 8833. We identify when it's needed and prepare it so the position is documented and defensible.
The US and UK tax years don't line up — is that a problem?
It can be, and it's a common source of error. The US uses the calendar year and the UK runs 6 April to 5 April — matching income and credits across that mismatch is part of the job.
