Art. 17
Treaty Protection
A UK workplace pension or SIPP is tax-favored under UK law, but US law does not automatically respect that treatment. Without the US-UK tax treaty, the IRS could tax employer contributions and investment growth inside the plan as they arise. The treaty's pension articles, Articles 17 and 18, are what keep that from happening, and they only work if they are claimed and applied correctly.
We advise Americans building UK pensions and UK nationals drawing down US retirement accounts. The work covers contributions, growth, lump sums, transfers, and the reporting that goes with each, so that both tax authorities see the same pension the way the treaty says they should.
How we deliver this service.
A rigorous, phase-driven process ensures nothing is missed and every position is defensible.
Pension Inventory
We catalog every plan on both sides: UK workplace pensions, SIPPs, 401(k)s, IRAs, Roth accounts, the State Pension, and US Social Security.
Treaty Classification
We determine how Articles 17 and 18 of the US-UK treaty apply to each plan's contributions, internal growth, and distributions.
Contribution Review
We test whether your ongoing contributions are deductible or excludable on both returns, including employer contributions to UK schemes.
Drawdown Modeling
We model withdrawal sequencing across both systems, comparing lump sums against regular distributions under each country's rates.
Transfer Screening
Before any pension transfer, including a QROPS move, we quantify the tax it would trigger in both countries. Many transfers should not happen.
Reporting & Filing
We prepare the annual reporting each plan requires: Form 8938, FBAR, treaty disclosures on Form 8833, and the returns themselves.
UK Pension Strategy
Keeping the IRS out of your SIPP's growth.
Under US domestic law, a UK pension is just a foreign account. Employer contributions could be current income, and growth inside the plan could be taxable each year. Article 18 of the treaty changes that: it lets qualifying employer contributions escape current US tax and defers US tax on the plan's internal growth until you take the money out. We document those positions so they hold up.
The famous trap is the lump sum. UK law lets you take 25% of your pension free of UK tax. US law contains no such exemption, and the treaty's saving clause lets the US tax its citizens as if key treaty benefits did not exist. A tax-free lump sum in the UK can be fully taxable in the US, so lump sum decisions need US analysis before you sign anything.
UK plan focus: Article 18 contribution and growth deferral, Article 17 distribution rules, the 25% lump sum problem, and QROPS transfer risk.
Tailored for every client profile.
US Drawdown Planning
Drawing a 401(k) or IRA from the UK.
Once you are UK resident, HMRC has primary taxing rights over most regular distributions from your 401(k) or traditional IRA under Article 17. Getting the mechanics right matters: how the payment is characterized, what US withholding applies, and how credits reconcile the two returns determine whether you pay the correct amount once or the wrong amount twice.
Roth accounts deserve special care. The treaty recognizes the Roth as a pension, and a qualified Roth distribution that is exempt from US tax should also be exempt from UK tax under Article 17. That makes Roth conversions before a move to the UK, and the timing of Roth withdrawals after it, some of the most valuable planning available to a transatlantic retiree.
US plan focus: Article 17 residence-state taxation, US withholding on distributions, Roth recognition under the treaty, and pre-move conversion planning.
Government Pensions
Two government pensions, taxed in one place.
The treaty assigns social security taxing rights to your country of residence. A UK State Pension paid to a US resident is taxed by the US; US Social Security paid to a UK resident is taxed by the UK. For years, the Windfall Elimination Provision also cut Social Security benefits for people who had earned a UK State Pension. Congress repealed WEP in 2025, and many transatlantic retirees saw benefits restored, which changes the retirement income math.
Reporting sits underneath all of this. UK pensions are specified foreign financial assets on Form 8938, and most are FBAR-reportable as well. The penalties for missing these forms are far larger than the tax usually at stake, so we build the reporting into the annual filing rather than treating it as an afterthought.
Government pension focus: residence-state taxation of State Pension and Social Security, the 2025 WEP repeal, Form 8938, and FBAR reporting.
Making a pension decision across two tax systems?
Lump sums, transfers, and Roth conversions are hard to unwind once taken. Talk to us before the paperwork is signed, not after.
Specific deliverables, precisely documented.
“A pension is decades of saving. The treaty protects it, but only when someone claims the protection correctly, year after year.”
Technical clarifications.
Answers to the most frequently asked questions about how this service works in practice.
Not automatically, and often not at all. The UK exemption does not exist in US law, and the treaty's saving clause generally lets the US tax its citizens on the lump sum anyway. The right answer depends on your facts, which is why we model the US cost before you elect to take it.
Under the treaty, no. Article 18 defers US tax on income accruing inside a qualifying UK pension scheme until distributions begin. Without the treaty position properly taken, that protection is not a given, so the analysis and disclosure matter.
The treaty recognizes the Roth as a pension, and a distribution that is tax-free in the US should also be tax-free in the UK under Article 17. This makes Roth conversions before a UK move worth serious consideration, because you convert at US rates and withdraw free of tax in both countries.
The Windfall Elimination Provision reduced US Social Security for people who also earned a UK State Pension. Its repeal in 2025 restored full benefits for many transatlantic retirees, with payments adjusted retroactively. If your retirement plan was built around a WEP-reduced benefit, the numbers should be rerun.
Related services.
Two Tax Systems, One Team
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