Treaty relief, claimed in the right place and the right order.
The US-UK treaty is what stops cross-border life being taxed twice — but it does nothing automatically. Every relief has to be claimed, on the right form, in the country the treaty says has to give way.
The treaty is a map, not a shield
Each article allocates a type of income: employment, dividends, pensions, capital gains, government service. Getting relief means knowing which country taxes first, which credits the other, and which forms — 8833 on the US side, HS302/HS304 on the UK side — carry the claim.
The saving clause complicates everything for US citizens, and misreading it is the most common expensive treaty mistake we see in returns prepared elsewhere.
- Residence tie-breaker analysis for dual residents
- Pension articles: lump sums, growth and rollovers
- Form 8833 treaty-based return positions
- UK treaty claims and certificate-of-residence requests
Claimed wrong, relief becomes exposure
A credit claimed in the wrong country unwinds years later with interest. Because we prepare both returns, the treaty position is built once and reflected consistently on both sides — which is the only way it actually works.
Where the treaty earns its keep
Three situations produce most of the value: pensions (growth sheltered under Article 18(1), lump sums allocated — though the contribution relief in Article 18(2) is carved out of the saving clause only for non-citizens, so it does not help a US passport holder), dual residents (the tie-breaker deciding which country taxes worldwide income), and cross-border workers with income apportioned between the two.
Each claim needs the right form in the right country — 8833 with the IRS, HS302/HS304 or a certificate of residence with HMRC — and each needs renewing as facts change. We keep the positions current year over year.
- Pension article claims on both sides
- Tie-breaker analysis for dual residents
- Certificates of residence and HMRC treaty claims
- Positions reviewed annually as facts change
What the fixed fee includes
- Article-by-article review of your income types
- Residence tie-breaker analysis for dual residents
- Form 8833 positions, drafted and disclosed
- UK treaty claims and certificates of residence
- Credit ordering across both returns
- Saving-clause analysis for US citizens
- Withholding-rate fixes at source
- Amended returns where past claims went wrong
How the engagement runs
Often handled together
Questions we get about this
Often, yes. Taking a treaty-based position on a US return generally means disclosing it on Form 8833.
Failing to disclose where disclosure is required carries its own penalty, separate from any tax at stake.
The one with secondary taxing rights gives the credit, so the answer depends on which country the treaty gives the primary claim for that income.
Claiming in the wrong direction is one of the more common ways people end up taxed twice on the same money.
Generally not. US states are not party to the treaty and several disregard it entirely.
That is why a state filing position can survive even where the federal position is fully protected.
In effect, usually - but not automatically. The treaty allocates taxing rights and sets out which country has the primary claim on each type of income.
Relief still has to be claimed, in the right country, in the right year. Nothing about it is applied for you.
Most commonly through foreign tax credits: tax paid in one country is credited against the liability in the other.
For pensions, dividends and certain gains, specific treaty articles override the default treatment instead. Which mechanism applies depends on the income.
It is the provision that lets the US continue taxing its own citizens as if much of the treaty did not exist.
It is why a US citizen in the UK cannot simply rely on the treaty to switch off US taxation, and why the exceptions to it matter so much in practice.
Last reviewed . Thresholds and rates change annually — check figures against the current tax year before relying on them.
Paying tax twice on the same income?
That usually means a relief was claimed in the wrong place. Tell us what happened and we will look at whether it can be recovered.