Retirement income built in one country, drawn in the other.
Decades of pension saving meet a border, and suddenly the rules change: lump sums, Social Security, annuities and drawdowns are each allocated between the two countries by treaty articles most preparers never read.
Where each payment is taxed is negotiable
US Social Security paid to a UK resident is taxable only in the UK. UK state pension paid to a US resident, only in the US. Private pensions follow different articles again, and lump sums have their own rule that catches the unwary 25% tax-free withdrawal.
Drawn in the right order from the right residence, the same pot can fund retirement at a materially lower total tax cost.
- Treaty allocation of every income stream
- Lump-sum planning before the withdrawal
- Withholding certificates so tax isn't taken twice upfront
- Both returns filed, credits aligned
Simpler filings, still two of them
Retirement rarely ends the filing obligations — a US citizen retired in the Cotswolds still files with the IRS every year. We keep both filings running quietly in the background so retirement stays retired.
What we typically handle for you
- Treaty allocation of each pension and benefit
- Lump-sum planning before withdrawal
- Drawdown order across pots and borders
- Social Security and state pension treatment
- Withholding certificates to stop double deduction
- Both annual returns, quietly handled
- IRA/Roth treatment for UK residents
- Estate coordination as part of the plan
The services that usually apply
Questions we get about this
Possibly, but transfers that are neutral in the UK can be taxable events to the IRS depending on the schemes.
Consolidation is worth checking against the US treatment before initiating rather than after.
They can be treated differently under the treaty, and the flexibility of drawdown creates timing choices an annuity does not.
Where you are resident when you draw frequently matters more than the product itself.
Pensions sit outside the UK estate in many cases but are not necessarily outside the US one, and the two systems test on different bases.
It is worth establishing which authority has a claim before assuming the UK position carries across.
The treaty allocates this, and the answer depends on the type of pension, where you are resident and where it was built.
Government and private pensions are not treated the same way, which is a common source of error.
Not automatically. The 25% UK relief is a feature of UK law, not the treaty, and the US does not simply follow it.
Taking it while US-resident without modelling first is one of the more expensive avoidable mistakes.
Cross-border state pension and social security payments have their own treaty treatment, distinct from private pensions.
Which country taxes them, and at what rate, depends on residence rather than on where the entitlement was earned.
Related pages
- Who we help
Families & trusts
Cross-border families: gifts, inheritances, trusts and the reporting that catches ordinary family planning, including children with US citizenship.
- Pillar guide
Tax specialists for US and UK
What US and UK tax specialists handle that a general accountant does not: residence tests, treaty relief, FBAR, PFICs, pensions, property and catch-up filings.
- Service
Pensions & retirement
Cross-border pension advice: UK pensions under US rules, 401(k)s and IRAs under UK rules, lump sums and treaty positions.
- Service
US federal returns
Form 1040 preparation for Americans abroad: FEIE, foreign tax credits, treaty positions and every schedule your situation requires.
- Who we help
Dual citizens
US-UK dual citizens: two lifelong filing obligations, treaty tie-breakers and reliefs coordinated so neither country taxes the same income twice.
- Glossary
Saving Clause: definition
The treaty provision that lets the US tax its citizens as if the treaty didn't exist.
Further reading
- Treaty Article 17: how the US and UK tax your pension income
Periodic pensions, lump sums and social security each follow a different rule in Article 17 - and the saving clause rewrites two of them for US citizens.
- UK pensions under US rules: where the treaty helps and where it does not
A UK pension is usually fine to hold. The tax-free lump sum is where assumptions get expensive.
- A British pension, an American return, and one treaty paragraph
One paragraph of the treaty covers social security, and it survives the saving clause. Whether it helps you depends entirely on which country you live in.
Last reviewed . Thresholds and rates change annually — check figures against the current tax year before relying on them.
Approaching drawdown?
Model the tax before you take the money. A lump sum that is free on one side may not be on the other.