This guide is for US citizens living in the UK who pay into, or already hold, a UK workplace pension or SIPP. In short: the US–UK tax treaty generally stops the US taxing growth inside a UK pension until you draw it, and can give a US deduction for contributions made through a UK employer, but UK pension tax relief does not carry across automatically, the UK’s 25% tax-free lump sum is generally taxable in the US for citizens, and the pension must still be reported to the IRS and the US Treasury.
How does the US treat a UK pension held by an American in Britain?
For most Americans in the UK, a registered UK pension is recognised by the treaty as a pension scheme, so the US does not tax the investment growth inside it each year; the US taxes money when it comes out, and gives credit for UK tax paid on the same income. What the treaty does not do is copy UK tax relief across the Atlantic wholesale.
The starting point is citizenship-based taxation. The US taxes its citizens on worldwide income wherever they live, and Article 1(4) of the 2001 US–UK income tax treaty, the “saving clause”, preserves that right: the US may tax its citizens as if the treaty had not come into effect.[1] Only the provisions listed in Article 1(5) survive the saving clause for citizens. For pensions, the list includes Article 17(1)(b), Article 17(3) (social security) and Article 18(1).[1]
Article 18(1) is the deferral rule. Where a member of a pension scheme established in one country is resident in the other, “income earned by the pension scheme may be taxed as income of that individual only when, and … to the extent that, it is paid to, or for the benefit of, that individual”.[1] The treaty defines a pension scheme as an arrangement that is generally exempt from income tax and operated principally to provide retirement benefits, and the accompanying Exchange of Notes confirms that UK approved occupational and personal pension schemes, and substantially similar later schemes, are included.[2] Today’s registered pension schemes, including workplace defined contribution plans, defined benefit schemes and SIPPs, are their successors.
Without the treaty, growth inside a non-US pension could be taxable in the US year by year, and the funds inside it exposed to the passive foreign investment company (PFIC) rules. That is why UK pensions are, for many Americans, more workable than ISAs, which the US taxes like an ordinary account (see ISAs, UK funds and PFIC rules).
How the treaty applies to a US citizen who is resident in the UK and holds a UK scheme is technical, and advisers do not all read it identically. The summary in this guide reflects the widely held view; your own US tax preparer should confirm the positions taken on your return.
Can a US citizen deduct UK pension contributions on a US return?
Often, yes, if the contributions are made through UK employment. Article 18(5) allows a US citizen resident in the UK, employed in the UK by a UK-resident employer, to deduct or exclude contributions to a UK pension scheme in computing US taxable income, and prevents employer contributions and accrued benefits from being treated as US taxable income.[1] The Treasury’s Technical Explanation describes it as providing benefits for contributions by or on behalf of a US citizen to UK pension schemes.[3]
The relief has three limits written into the article:[1]
- It cannot exceed the relief the UK itself gives for the contribution.
- It cannot exceed what the US would allow its own residents for contributions to a “generally corresponding” US pension scheme. For 2026 the relevant US limits are $24,500 of elective deferrals (plus an $8,000 catch-up from age 50, or $11,250 at ages 60 to 63) and a $72,000 overall cap on contributions to a defined contribution plan.[9]
- Contributions must relate to the UK employment in the period you carry it out.
The treaty language covers contributions “paid by or on behalf of” the individual, so both employee and employer contributions to a workplace scheme generally qualify within those limits. The position is less settled for personal contributions to a SIPP made outside any employer arrangement: some advisers treat them as attributable to the UK employment, others do not. The self-employed fall outside Article 18(5) altogether, because it depends on employment with a UK-resident employer. Green card holders who are not citizens are in a different position again, because Article 18(5) is written for US citizens.
| Route | UK tax relief | Usual US treatment under Article 18(5) |
|---|---|---|
| Net pay arrangement (workplace scheme, deducted before tax) | Full relief at your marginal rate through payroll | Deductible or excludable within US plan limits |
| Relief at source (many workplace schemes and personal pensions) | Provider adds 20%; higher and additional rate relief claimed through Self Assessment[6] | Deductible within limits where attributable to the UK employment |
| Salary sacrifice | Salary reduced, so no income tax or National Insurance on the amount sacrificed | Treated as an employer contribution; excluded within limits |
| Employer contribution | Not taxed as a benefit in kind | Excluded within limits |
| Personal SIPP contribution, not through employer | Relief at source plus Self Assessment claim | Debated; some advisers treat it as outside Article 18(5) |
| Self-employed contribution | Relief at source plus Self Assessment claim | Outside Article 18(5); no treaty deduction |
Where no US deduction is available, the cost in the year may be small: for many employed Americans in the UK, UK tax on salary exceeds US tax on the same income, so foreign tax credits already eliminate the US liability. Money that went in without a US deduction also forms part of your US “cost basis” in the pension, which reduces the taxable part of later benefits, so a year-by-year record of contributions and their US treatment is worth keeping.
How does UK pension tax relief work in 2026/27?
You receive UK income tax relief on personal contributions up to 100% of your UK relevant earnings, or on £3,600 gross (£2,880 net) if you have no earnings, subject to the annual allowance of £60,000 across all your schemes, including employer contributions.[5][6]
| Allowance | 2026/27 | What it does |
|---|---|---|
| Annual allowance | £60,000[5] | Maximum tax-relieved pension saving a year (all schemes, employee and employer); unused allowance can be carried forward from the previous three tax years[7] |
| Tapered annual allowance | Down to £10,000 | Reduced by £1 for every £2 of adjusted income above £260,000, where threshold income also exceeds £200,000 |
| Money purchase annual allowance | £10,000 | Applies once you have flexibly accessed a defined contribution pension, for example by taking taxable drawdown income |
| Lump sum allowance | £268,275 | Caps total tax-free cash taken in your lifetime (with some protections) |
| Lump sum and death benefit allowance | £1,073,100 | Caps tax-free lump sums in life and on death combined |
How the relief reaches you depends on the scheme. Under a net pay arrangement your employer deducts the contribution before tax, so relief is automatic at your top rate. Under relief at source you pay from taxed income; the provider claims basic-rate relief of 20% and adds it to your pot, and a higher-rate or additional-rate taxpayer claims the rest through Self Assessment, which works by extending the basic-rate band by the gross contribution.[6] In 2026/27, outside Scotland, the personal allowance is £12,570, the higher rate of 40% starts at £50,271, the additional rate of 45% starts above £125,140, and the personal allowance is withdrawn by £1 for every £2 of adjusted net income above £100,000.[8] A pension contribution reduces adjusted net income, which is why relief can be worth much more in the £100,000 to £125,140 band. Scottish taxpayers have different bands and rates.
Worked example: UK tax relief at five income levels (computed in Edale’s planner)
Fictional individual making an £8,000 net personal contribution to a relief-at-source pension, which becomes £10,000 in the pot. Salary is varied from £30,000 to £150,000; everything else is held constant. The planner compared year-one UK income tax with and without the contribution using 2025/26 rules; the thresholds that drive these results (£12,570, £50,270, £100,000 and £125,140) are unchanged in 2026/27. Illustrative only: results depend on the assumptions and are not guaranteed. It shows UK relief only; the US effect for a US citizen is discussed below.
| Salary | Added to the pot by the provider | Extra relief through the tax bands | Total relief | Effective cost of £10,000 in the pot |
|---|---|---|---|---|
| £30,000 | £2,000 | £0 | £2,000 | £8,000 |
| £55,000 | £2,000 | £946 | £2,946 | £7,054 |
| £80,000 | £2,000 | £2,000 | £4,000 | £6,000 |
| £110,000 | £2,000 | £4,000 | £6,000 | £4,000 |
| £150,000 | £2,000 | £2,500 | £4,500 | £5,500 |
Show the figures
| Salary | Added to the pot | Extra relief via tax bands | Total relief | Net cost |
|---|---|---|---|---|
| £30,000 | £2,000 | £0 | £2,000 | £8,000 |
| £55,000 | £2,000 | £946 | £2,946 | £7,054 |
| £80,000 | £2,000 | £2,000 | £4,000 | £6,000 |
| £110,000 | £2,000 | £4,000 | £6,000 | £4,000 |
| £150,000 | £2,000 | £2,500 | £4,500 | £5,500 |
At £30,000 the whole salary sits in the basic-rate band, so relief is the 20% the provider adds. At £55,000 only part of the income is taxed at 40%, so extending the basic-rate band saves £946 more (the £4,730 above the £50,270 higher-rate threshold, at 20%). At £80,000 the whole £10,000 comes out of the higher-rate band: another £2,000. At £110,000 the contribution cuts adjusted net income to £100,000, restoring £5,000 of personal allowance as well as giving higher-rate relief, so total relief reaches £6,000, or 60% of the gross contribution. At £150,000 income remains above £125,140 even after the contribution, so the personal allowance stays lost and relief is 45%.
For a US citizen, the UK figures are only half the picture. Lower UK tax means fewer UK taxes available to credit against the US liability. If the contribution also qualifies for a US deduction under Article 18(5), US taxable income falls too, and the two effects broadly offset. If it does not, the US liability is unchanged while the UK tax that shelters it falls; for a higher earner whose UK tax still exceeds the US tax, the US top-up usually remains nil, but in lower-income years or for households with significant US investment income it may not. This is the kind of interaction Edale’s planner calculates year by year rather than assumes.
Is the 25% tax-free lump sum tax-free in the US?
For a US citizen living in the UK, the prevailing view is that it is not: the US generally taxes the pension commencement lump sum like other pension income, because US domestic law has no equivalent exemption and no treaty provision that survives the saving clause clearly removes US tax. The IRS has issued no guidance specific to it, and some practitioners take a different view.
In the UK you can usually take up to 25% of a defined contribution pot as a pension commencement lump sum free of income tax, within the lump sum allowance of £268,275.[5] Two treaty provisions are relevant. Article 17(2), under which a lump sum from a scheme in one country paid to a resident of the other is taxable only in the scheme’s country, is not among the saving-clause exceptions in Article 1(5); HMRC’s Double Taxation Relief Manual concludes that “the US can tax lump sums received by US citizens from UK schemes”.[4] That passage addresses recipients living in the US; for someone living in the UK, Article 17(2) does not apply at all. Article 17(1)(b), which is a saving-clause exception, exempts amounts that would be exempt in the country where the scheme is established, but it binds the country of residence, here the UK, not the US as the country of citizenship.[1]
The contrary argument, made mainly for Americans living in the US, is that tax-free cash falls under Article 17(1), so that Article 17(1)(b) exempts it in the US as the country of residence. That does not help a UK resident, and HMRC’s manual does not bind the IRS. Agree the position with your US tax preparer.
The practical difficulty is credit. Because the UK charges no tax on the lump sum, there is no UK tax to set against the US tax on it. Whether US tax is actually payable depends on:
- Your US cost basis: contributions that were not deducted or excluded on US returns can generally be recovered tax-free, reducing the taxable part.
- Excess foreign tax credits: UK income tax is often higher than US tax on the same income, and unused credits can be carried back one year and forward ten,[19] which may absorb some or all of the US tax, subject to the credit category (“basket”) rules.
- Timing: taking tax-free cash in a year with little other income, or spreading it through phased withdrawals where the scheme allows, changes the US rate that applies.
Whether and when to take tax-free cash is therefore a cross-border decision, made more pointed by unused pension funds entering the inheritance tax estate from April 2027.
How are UK pension withdrawals taxed for a US citizen?
Regular income from a UK pension, whether drawdown, an annuity or a defined benefit pension, is taxed in the UK through PAYE at your marginal rate, and is also taxable in the US, where UK tax paid is available as a foreign tax credit. Where the UK rate is at or above the US rate, the US top-up is usually nil.
Article 17(1)(a) gives the country of residence the right to tax pensions, and the UK taxes them in full as pension income.[1] For a US citizen the saving clause means the US also taxes the payment, with relief under the treaty’s double taxation article.[1] In 2026 the US 22% bracket for a single filer runs from $50,400 to $105,700 of taxable income,[20] while UK pension income above £50,270 is taxed at 40%, so for many retirees the UK liability is the larger and fully absorbs the US one. Three things can change that:
- Tax-free cash and basis, discussed above, where UK tax is low or nil.
- Currency. US tax is calculated in dollars. The dollar value of a sterling payment, and of the UK tax on it, moves with the exchange rate.
- Low-income years, for example between retirement and State Pension age, when UK income may fall within the personal allowance while US tax still applies above the standard deduction.
The US 10% additional tax on early distributions is written for US plans and IRAs and is generally not applied to UK pension payments; your preparer should confirm this. UK rules set their own minimum age: 55 now, 57 from 6 April 2028.[14]
If you later move to the US, periodic UK pension payments become taxable there as your country of residence; see planning a move between the UK and the US.
Which US forms does a UK pension trigger?
At a minimum, a UK pension is generally included on the FBAR, and on Form 8938 once your foreign assets exceed the thresholds. Forms 3520 and 8621, which catch many other foreign holdings, are usually not required for a qualifying pension because of specific exemptions.
| Form | Does it apply? | Rule |
|---|---|---|
| FinCEN 114 (FBAR) | Generally yes, if all foreign accounts together exceed $10,000 at any time in the year | The only retirement exceptions are for IRAs and US 401(a), 403(a) and 403(b) plans; UK schemes are not among them. Due 15 April, with an automatic extension to 15 October[10] |
| Form 8938 (FATCA) | Yes, above the thresholds | Report your interest in the foreign pension plan, valued at the fair market value of your beneficial interest at year-end. Living abroad: over $200,000 at year-end or $300,000 at any time (single); $400,000 or $600,000 (married filing jointly)[11][18] |
| Forms 3520 and 3520-A (foreign trusts) | Usually no | Revenue Procedure 2020-17 exempts “tax-favored foreign retirement trusts” meeting conditions such as tax-favoured status, annual reporting to the local tax authority and restricted withdrawals; most UK registered schemes are thought to qualify, but check the conditions for yours[12] |
| Form 8621 (PFIC) | Usually no, for funds held inside the pension | Treasury Regulation §1.1298-1(c)(4) removes the filing requirement for members of an arrangement treated as a pension fund under a treaty whose income is taxed only when distributed[13] |
| Form 1040 and Form 1116 | Yes, when contributions are deducted or benefits paid | Treaty-based deductions and pension income flow through the return; UK tax on pension income is claimed as a foreign tax credit |
Penalties for missed FBAR and Form 8938 filings can be significant even where no tax is due. Many UK providers date annual statements to the scheme anniversary rather than 31 December, so a year-end valuation may need to be requested.
What is changing between now and 2029?
Four UK changes affect how Americans in Britain use pensions over the next few years; two are already law and two are announced policy.
| Change | Date | Status |
|---|---|---|
| Normal minimum pension age rises from 55 to 57 (protected pension ages preserved for some members) | 6 April 2028 | Legislated[14] |
| Most unused pension funds and death benefits included in the estate for inheritance tax; personal representatives responsible for paying | Deaths on or after 6 April 2027 | Legislated in Finance Act 2026 (Royal Assent 18 March 2026)[15][17] |
| Income tax personal allowance (£12,570) and basic rate limit (£37,700) held | To 5 April 2031 | Announced at Budget 2025[16] |
| Salary-sacrificed pension contributions above £2,000 a year become subject to employer and employee National Insurance | 6 April 2029 | Announced at Budget 2025[16] |
The inheritance tax change matters most. Until April 2027, a pension is usually outside the UK estate, which has made it a natural last asset to spend. From then, pension funds left on death are generally within the estate, subject to the spouse exemption, and the government’s policy paper confirms that death-in-service benefits and dependants’ scheme pensions are excluded.[15] US estate tax is a separate question for US citizens; see estate planning across the US and UK. The minimum age change matters to anyone planning to retire in their mid-fifties, and the salary sacrifice change will reduce the National Insurance saving from 2029.
How the Edale Wealth Hub helps
The hard part of a UK pension for an American is the way the UK and US calculations interact over decades. Edale’s planner, used by an adviser with a client and by clients themselves, models the household in both systems at once, year by year to age 100 and beyond.
- UK pensions in full. Workplace pensions, SIPPs, defined benefit schemes and the State Pension, with relief at source, higher-rate relief through the bands, the annual allowance and taper, the money purchase annual allowance and the lump sum allowance.
- The US interaction. For US persons, the planner applies US federal tax alongside UK tax, with foreign tax credits and treaty treatment, including treaty pension elections, so the plan shows what the household keeps rather than a UK-only figure.
- Minimum pension age. A dedicated tool shows the effect of the rise to 57 from April 2028 on a planned retirement date.
- Estate effect. UK inheritance tax to the second death, with pensions in the estate from April 2027. The planner does not model US estate tax; that is handled separately with your other advisers.
- Funds. PFIC identification flags non-US funds held outside a pension, where the US problems arise.
- Scenarios. Tax-free cash now or later, or an earlier retirement, can be saved as scenarios and compared side by side.
The tax figures are planning estimates to discuss with your adviser and share with your accountant or US tax preparer; they are not tax returns. Edale does not prepare US tax returns. See the cashflow planner or arrange a conversation.
Frequently asked questions
Does the US tax the growth inside my UK pension each year?
Generally not. Article 18(1) of the US–UK treaty, which applies to US citizens despite the saving clause, allows income earned by a pension scheme to be taxed only when it is paid out. Your UK pension still has to be reported on the FBAR and, above the thresholds, on Form 8938, and the treaty position should be confirmed by your US tax preparer.
Can I claim a US deduction for my workplace pension contributions?
Usually, if you are a US citizen employed in the UK by a UK employer. Article 18(5) allows contributions attributable to that employment to be deducted or excluded, up to the lower of the UK relief and the relief available for a comparable US plan, which for 2026 means $24,500 of employee deferrals plus catch-up and $72,000 in total.
Are personal SIPP contributions deductible in the US?
This is less clear. Article 18(5) is tied to UK employment with a UK-resident employer, and advisers differ on whether personal SIPP contributions made outside an employer arrangement qualify. Self-employed contributions do not. Where no US deduction is available, the contribution adds to your US cost basis, which can reduce US tax when benefits are later paid.
Is my 25% tax-free cash taxable in the US?
For a US citizen living in the UK, the prevailing view is yes: US domestic law has no equivalent exemption, and no treaty provision that survives the saving clause clearly removes US tax. HMRC’s manual takes the same view, though the IRS has issued no specific guidance and some practitioners disagree. Whether tax is actually payable depends on your US cost basis, carried-forward foreign tax credits and timing.
Do I need to file Form 3520 for my UK pension?
Usually not. Revenue Procedure 2020-17 exempts US individuals from Forms 3520 and 3520-A for tax-favoured foreign retirement trusts that meet its conditions, such as restricted withdrawals and annual reporting to the local tax authority. Most UK registered pension schemes are thought to qualify, but the conditions should be checked for your scheme.
Do funds inside my SIPP count as PFICs?
The underlying funds may technically be PFICs, but Treasury Regulation §1.1298-1(c)(4) removes the Form 8621 filing requirement where they are held through an arrangement treated as a pension fund under a treaty and income is taxed only on distribution. The same funds held in an ISA or general account would not have that protection.
When can I access my UK pension?
The normal minimum pension age is 55 until 5 April 2028 and rises to 57 on 6 April 2028. Some members of schemes that gave a right to take benefits earlier, before 4 November 2021, keep a protected pension age, and some uniformed public service schemes are exempt from the increase. Check your scheme’s rules before planning around age 55 or 56.
Will my UK pension be subject to inheritance tax?
From 6 April 2027, most unused pension funds and death benefits are included in the estate for UK inheritance tax, with the spouse exemption preserved and death-in-service benefits and dependants’ scheme pensions excluded. For US citizens, US estate tax is a separate question with different rules and exemptions, so both systems need to be considered together.
Sources
- US Treasury — Convention between the United States and the United Kingdom for the avoidance of double taxation (2001), Articles 1, 3, 17, 18 (accessed September 2026)
- US Treasury — US–UK Exchange of Notes (2001), definition of pension schemes (accessed September 2026)
- US Treasury — Technical Explanation of the US–UK Convention and Protocol (accessed September 2026)
- HMRC — Double Taxation Relief Manual DT19853: United States of America, notes (accessed September 2026)
- HMRC — Pension schemes rates and allowances (2026 to 2027) (accessed September 2026)
- GOV.UK — Tax on your private pension contributions: tax relief (accessed September 2026)
- GOV.UK — Tax on your private pension contributions: annual allowance (accessed September 2026)
- GOV.UK — Income Tax rates and Personal Allowances (accessed September 2026)
- IRS — COLA increases for dollar limitations on benefits and contributions (2026) (accessed September 2026)
- FinCEN — FBAR line item filing instructions (accessed September 2026)
- IRS — Instructions for Form 8938 (accessed September 2026)
- IRS — Revenue Procedure 2020-17 (accessed September 2026)
- eCFR — 26 CFR §1.1298-1, Section 1298 reporting requirements (accessed September 2026)
- HMRC — Increasing normal minimum pension age (accessed September 2026)
- HMRC — Inheritance Tax: unused pension funds and death benefits (policy paper, 26 November 2025) (accessed September 2026)
- HM Treasury — Budget 2025: overview of tax legislation and rates (accessed September 2026)
- ICAEW — Finance Act 2026 (accessed September 2026)
- IRS — Comparison of Form 8938 and FBAR requirements (accessed September 2026)
- US Code — 26 U.S.C. §904(c), carryback and carryover of excess foreign taxes (accessed September 2026)
- IRS — Tax inflation adjustments for tax year 2026 (accessed September 2026)