Introduction: The UK State Pension After You Move to America
Your UK State Pension is taxable only in the United States once you are a US tax resident. Even so, HMRC and the IRS both regularly get the treatment wrong. Furthermore, the error rarely sits with the pension itself. Instead, it hides in a UK Self Assessment return or a US preparer's software. Consequently, wealthy Britons in America often pay tax twice on income that one treaty article clearly allocates to a single country.
Why the UK State Pension Question Matters for Wealthy Britons
The UK State Pension is modest beside a banking bonus or a portfolio of London flats. However, it arrives every four weeks for the rest of your life, and small errors compound. Moreover, sophisticated clients usually hold other UK income, such as rental profits or director's fees, that keeps them inside the UK tax net. That connection is exactly what drags the UK State Pension into a UK return where it does not belong.
Most Britons in America assume the pension is either tax-free or taxed like US Social Security. Neither assumption is correct. Therefore, this guide sets out the treaty rule, the IRS mechanics, the HMRC traps and the planning points that matter for high earners. At TaxYork, we see these mistakes on returns prepared by otherwise competent firms every filing season.
What Changed for 2026/27
The full new UK State Pension rose by 4.8% to £241.30 a week from 6 April 2026, according to GOV.UK's State Pension rates page. That equals roughly £12,548 a year, up from £230.25 a week in 2025/26. Additionally, the basic State Pension for those who reached pension age before April 2016 now stands at £184.90 a week. Meanwhile, State Pension age is rising from 66 to 67 for anyone born on or after 6 April 1960. The change completes by 2028.
Two other 2026 changes matter here. Firstly, the cheap Class 2 route for voluntary National Insurance abroad closed on 6 April 2026. Secondly, the repeal of the Windfall Elimination Provision now lets many Britons draw both pensions in full. We cover both below.
Article 17(3): The Treaty Rule That Decides Who Taxes the UK State Pension
The US-UK income tax treaty answers the central question in one sentence. Specifically, Article 17(3) of the 2001 Convention covers social security payments made by one country to a resident of the other. Those payments "shall be taxable only in that other State." The UK State Pension is a payment under UK social security legislation. Therefore, when you are resident in America, only America may tax it.
The Exact Wording and Why It Overrides Paragraph 1
Article 17 contains separate rules for private pensions, lump sums and social security. Notably, paragraph 3 opens with "Notwithstanding the provisions of paragraph 1," so it prevails over the general pension rule. As a result, there is no need to debate whether the UK State Pension is a "pension or other similar remuneration." It sits in its own category with its own answer.
HMRC publishes the full consolidated text on its USA tax treaties page. We recommend reading paragraph 3 alongside paragraphs 1 and 2, because advisers frequently cite the wrong paragraph. Indeed, several ranking guides still describe the UK State Pension as taxable "in the source country." That is the opposite of what the treaty says.
Why the Savings Clause Does Not Undo It
The treaty's savings clause in Article 1(4) normally lets the United States tax its citizens as if the treaty did not exist. However, Article 1(5)(a) lists specific exceptions, and paragraph 3 of Article 17 is one of them. Consequently, the carve-out protects every recipient, including US citizens and green card holders.
This point matters more for the mirror-image case. An American living in Britain who draws US Social Security enjoys the same carve-out, so the United States cannot tax those benefits at all. By contrast, the government pension article sits on a narrower list. We explain that distinction in our guide to NHS, Teachers' and local government pensions in America.
Dual Nationals, Green Card Holders and British Citizens
Your passport does not change the outcome. You may be a British citizen on an E-2 visa, a green card holder or a dual national US UK citizen. In every case, the test is treaty residence under Article 4. Accordingly, once you are a US resident for treaty purposes, the UK State Pension falls under American taxing rights alone. Dual residents must first apply the Article 4 tie-breaker, which usually follows your permanent home and centre of vital interests.
How the IRS Taxes the UK State Pension
Knowing that America has the taxing right is only half the answer. The other half is how the IRS actually computes the tax. Here, the most common and most expensive mistake appears.
Full Inclusion, Not the 85% Social Security Rule
US Social Security benefits are taxed under a special formula that caps the taxable portion at 85%. Many preparers assume the UK State Pension receives the same treatment. It does not. According to IRS Publication 915, foreign social security benefits "are taxable as annuities." The only exceptions arise where a treaty exempts them or treats them as US Social Security.
Only the treaties with Canada and Germany contain that "treat as US Social Security" language. The UK treaty does not. Therefore, the UK State Pension is fully taxable as ordinary pension income on your US return. Entering it on the Social Security worksheet understates income by 15% of the pension. For a retiree in the 35% bracket, that error repeats every single year.
Where It Goes on Form 1040
You report the gross UK State Pension on lines 5a and 5b of Form 1040, as pension and annuity income. The general annuity rules appear in IRS Publication 575. In practice, most practitioners report the full amount as taxable. National Insurance contributions are not treated as a recoverable investment in the contract. We recommend documenting that position in your workpapers each year.
The pension is not earned income. Consequently, the Foreign Earned Income Exclusion can never shelter it, even in years you spend abroad. Furthermore, because the United States has the exclusive taxing right, there is normally no UK tax to credit. The Foreign Tax Credit therefore plays no part unless HMRC has wrongly taxed the payment, which we address below.
Converting Sterling Payments to Dollars
The Department for Work and Pensions pays the UK State Pension in sterling. On request, it will pay directly into a US bank account in dollars. If you receive sterling, convert it using a consistently applied rate. The IRS yearly average currency exchange rates are the simplest defensible choice; the 2025 figure was 0.759 pounds per dollar. Our guide to choosing the right exchange rate for US and UK tax explains which rate applies to which form.
US State Income Tax on the UK State Pension
State taxes add a further layer. Many states exempt federal Social Security benefits entirely. However, those exemptions usually track the federal definition, and the UK State Pension is not federal Social Security. As a result, a state that exempts your US benefit may still tax your British one in full. Florida and Texas levy no personal income tax, whereas New York, New Jersey and California generally tax foreign pension income. Accordingly, your US tax return preparation must address the state return as carefully as the federal one.
Keeping HMRC From Taxing the UK State Pension
The treaty removes HMRC's right to tax, but it does not remove the payment from HMRC's systems. This gap causes the most expensive errors we see.
Paid Gross, But Not Automatically Exempt
The UK State Pension is always paid without tax deducted. That leads many people to assume HMRC ignores it. However, GOV.UK's guidance on tax on your State Pension abroad warns that both countries may tax you. You must then claim relief. In other words, the exemption exists, but you must actively claim it.
The Self Assessment Trap for Landlords and Directors
If you have no other UK income, HMRC rarely pursues the UK State Pension of a US resident. The problem arises when you file a UK Self Assessment return for other reasons. Rental income from a London flat, UK director's fees or a partnership share all require a return. Once that return exists, UK tax software includes the pension automatically unless someone claims the treaty exemption on the non-residence pages.
For a higher-rate landlord, the result is a 40% charge on the entire pension. Worse still, that UK tax is not creditable in America. Under Treasury Regulation section 1.901-2(e)(5), a foreign tax you were not legally obliged to pay is not a compulsory payment. Since the treaty says the UK had no right to it, the IRS will refuse the credit. You then pay full tax in both countries.
Form US-Individual 2002 and IRS Certification
HMRC's Form US-Individual 2002 lets a US resident claim relief at source or a repayment on UK pensions, expressly including the State Pension. The form requires the IRS to certify that you are a US resident. You obtain that certification by filing Form 8802, which produces Form 6166.
The same form also covers private UK pensions, which follow Article 17(1) instead. For a workplace or personal pension, HMRC issues an NT code so the provider stops deducting PAYE. Consequently, one well-prepared claim can clean up every UK pension stream at once.
Reclaiming UK Tax Already Paid
If HMRC has already collected tax on your UK State Pension, you can recover it. You can amend a Self Assessment return within 12 months of the filing deadline. Beyond that, overpayment relief runs for four years from the end of the tax year concerned. Therefore, a 2022/23 overpayment must be claimed by 5 April 2027. Crucially, you should correct the US position at the same time, removing any Foreign Tax Credit claimed for that UK tax.
Reporting, Uprating and Claiming the UK State Pension From America
Several practical questions sit alongside the tax rules. Each carries its own trap for high-net-worth clients.
Not an FBAR Asset, But the Receiving Account Is
The UK State Pension is an unfunded government entitlement, not an account. Consequently, it does not belong on an FBAR or on Form 8938. However, the UK bank account that receives it absolutely does. Once your foreign accounts exceed $10,000 in aggregate at any point in the year, FinCEN's FBAR rules apply. Similarly, Form 8938 applies above $50,000 at year end for single US residents, as the IRS comparison of Form 8938 and FBAR explains.
In our experience, a London current account kept open "just for the pension" often causes a missed FBAR. If yours has gone unreported, our FBAR and FATCA compliance team can bring the filings up to date. We use the appropriate offshore disclosure route.
Annual Increases Continue in the USA
Many Britons retiring abroad receive a "frozen" pension that never rises. America is different. The United States appears on the official list of countries where the State Pension is increased each year. That status flows from the US-UK social security agreement. Therefore, your UK State Pension receives the same triple-lock increase every April as a pensioner in Birmingham.
Claiming Through the International Pension Centre
The pension is never paid automatically. You must claim it from the International Pension Centre, and you can do so up to four months before you reach State Pension age. Before claiming, check your State Pension forecast to confirm your qualifying years. You need 10 qualifying years for any payment and 35 for the full new UK State Pension.
Deferral as a Planning Lever for High Earners
Deferral deserves serious attention if you are still working in the United States. According to GOV.UK's deferral rules, each nine weeks of deferral adds 1% to your weekly payment for life, which is just under 5.8% a year. Moreover, deferral keeps the income out of a year when your marginal federal and state rate may exceed 45%. Consider a senior executive retiring in two or three years. Deferring the UK State Pension until earned income falls away often produces a better lifetime result.
Your US Social Security and the UK State Pension Together
Many Britons in America have worked in both countries. Consequently, they expect two state pensions, and the interaction used to be painful.
The End of the Windfall Elimination Provision
Until recently, the Windfall Elimination Provision could cut US Social Security. It hit anyone who also drew a foreign pension from work outside the US system. However, the Social Security Fairness Act, signed on 5 January 2025, repealed both WEP and the Government Pension Offset for benefits payable after December 2023. As a result, your UK State Pension no longer reduces your American benefit. Our analysis of the WEP and GPO repeal covers the retroactive payments in detail.
Totalisation and Voluntary National Insurance After April 2026
The US-UK totalisation agreement lets each country count your contributions in the other to help you qualify. Nevertheless, it does not merge the benefits; each country pays its own share. Our guide to US-UK Social Security totalisation explains how the periods combine.
Filling gaps has also become more expensive. From 6 April 2026, HMRC removed access to voluntary Class 2 contributions for most people abroad. It also raised the connection test to 10 years. Class 3 now costs £18.40 a week, or £956.80 a year. Even so, one extra year typically adds about £6.89 a week to a UK State Pension for life. Our dedicated guide to voluntary National Insurance for Americans works through the payback.
Cash Flow, Allowances and Records for the UK State Pension
Beyond the headline treaty rule, three practical issues decide whether the pension runs smoothly. Each is easy to fix in advance. By contrast, each is awkward and expensive to fix afterwards.
Estimated Tax When Nothing Is Withheld
The DWP never withholds US tax, so every dollar of the pension is unpaid until you settle it. Consequently, retirees often meet an underpayment penalty in the first year their salary withholding stops. Under section 6654 of the Internal Revenue Code, you avoid the penalty by paying 110% of the prior year's tax if your adjusted gross income exceeded $150,000. Alternatively, you can pay 90% of the current year's liability through quarterly Form 1040-ES instalments.
Notably, the Code contains a narrow waiver for the year you retire after reaching 62 and the following year. However, it applies only where the underpayment had reasonable cause. Therefore, we recommend building the pension into your first retirement-year estimates rather than relying on that waiver. Where you also receive a US employer pension, you can simply increase the voluntary withholding on that payment to cover the British one.
What the Exemption Does to Your Personal Allowance
Removing the pension from a UK return frees your personal allowance for other income. British nationals keep the £12,570 allowance even when non-resident, as GOV.UK's guidance on the Personal Allowance for non-residents confirms. As a result, the allowance then shelters rental profit instead of pension.
By contrast, a US citizen with no British or EEA nationality generally gets no UK personal allowance as a non-resident. For that client, the treaty claim matters even more. Every pound of pension would otherwise be taxed from the very first pound. Accordingly, we check nationality before modelling any non-resident UK return.
Records the IRS and HMRC Will Accept
The DWP does not issue a P60 for the State Pension. Instead, it sends an annual uprating letter confirming your weekly rate from April. Keep every letter alongside the bank statements showing each four-weekly credit. Additionally, keep a copy of any treaty claim and HMRC's reply. Together, these documents prove both the amount you reported to the IRS and your exemption in Britain. Moreover, they usually shorten any enquiry from either authority to a single exchange of letters.
The Move Year and the Move Back to Britain
The treaty rule depends on residence, so any change of residence needs care. Both directions create traps.
The Year You Arrive in America
In your move year, the split-year rules may treat you as UK resident for only part of the year. Similarly, you may be a dual-status taxpayer in the United States. Consequently, payments of the UK State Pension received during your UK-resident period remain UK-taxable, while later payments fall under Article 17(3). Getting the cut-off date right on both returns prevents a mismatch that neither tax authority will fix for you.
Moving Back Reverses the Rule
Article 17(3) only applies to payments made to a resident of the other country. Therefore, once a US citizen moves back to Britain, the UK State Pension becomes UK-taxable again. The United States also taxes it, because Article 17(3) no longer applies at all and the savings clause preserves US tax on citizens. In that case, you claim a Foreign Tax Credit on Form 1116 for the UK tax. Accordingly, anyone planning to return to the UK should model the change before booking flights. Our cross-border planning service handles exactly this modelling.
Americans Who Built a UK Record and Went Home
The same rule helps US citizens who spent a decade or more working in London and then returned home. Many assume a British pension belongs to Britain for tax purposes. However, Article 17(3) applies to any UK social security payment made to a US resident, whatever their nationality. Consequently, a returning American banker with 12 qualifying years draws a partial pension taxable only in the United States. At 2026/27 rates, 12 years produces roughly £82.73 a week. Nevertheless, the pension still arrives into whichever bank account you nominate, so the FBAR point above applies with equal force.
A Worked Case Study With Real Numbers
The following illustrative case combines the errors we most often correct. Names and details are fictional, but the figures follow the rules above.
The Facts
Alistair is a 67-year-old dual US-UK national who spent 30 years in London investment banking. He moved to Connecticut in 2019 and retired in 2024. He reached State Pension age in April 2025 with 38 qualifying years, so he receives the full UK State Pension of £230.25 a week. Additionally, he owns a Kensington flat producing £58,000 of net rental profit a year. He therefore files a UK Self Assessment return as a non-resident.
What Went Wrong
His UK agent's software included the pension in his 2025/26 UK return. With £11,743 of pension on top of the rental profit, HMRC charged 40% on the whole pension, an extra £4,697 of UK tax. Meanwhile, his US preparer mishandled the 2025 UK State Pension of £8,750, or $11,528 at the IRS average rate. The preparer entered it on the Social Security worksheet. That taxed only 85%, omitting $1,729 of income. The preparer also claimed a Foreign Tax Credit for the UK tax on the pension. Furthermore, the London current account receiving the pension had never appeared on an FBAR.
The Resolution
We amended the UK return within the 12-month window, claiming the Article 17(3) exemption on the non-residence pages. As a result, HMRC repaid £4,697, about $6,188. On the US side, we amended the 2025 return to include the full pension. That added roughly $605 of federal tax at his 35% bracket. We also removed the unsupportable credit before any examination could deny it. Finally, we filed the outstanding FBARs through the appropriate disclosure route. Overall, Alistair recovered around $5,580 net and now reports the UK State Pension correctly on both sides every year.
How TaxYork Can Help
We prepare US and UK returns together, so the treaty position is identical on both. Our team handles the Form US-Individual 2002 claim, the Form 8802 certification and the HMRC repayment. We also review prior-year returns for the 85% error and unsupported credits, and correct them before either authority asks. Furthermore, we handle FBAR and Form 8938 filings for the accounts that receive your pension. Above all, we give high-net-worth Britons in America a single, coordinated compliance process rather than two firms working in isolation.
Conclusion
Article 17(3) gives the United States the sole right to tax the UK State Pension of a US resident. The savings clause does not undo it. However, the IRS taxes it in full as pension income, not at the 85% Social Security rate. Meanwhile, HMRC will tax it at up to 40% if a UK return includes it and nobody claims the exemption. Ultimately, the fix is straightforward: one treaty claim in Britain, correct reporting in America, and an FBAR for the account that receives the money.
Contact Us
If you receive a UK State Pension in America, or will soon, book a consultation with our US-UK team. Email hello@taxyork.com or call 020 3488 8606. Our work follows guidance from the ICAEW, the Chartered Institute of Taxation and AICPA and CIMA. For independent background on state pensions, MoneyHelper's State Pension guide and Investopedia's Social Security overview are useful starting points.
Disclaimer
This article provides general information about the UK State Pension and related US-UK tax matters. It does not constitute tax or legal advice for any specific situation. Rates, thresholds, treaty interpretations and published guidance change, and the correct approach depends entirely on your own circumstances. Accordingly, you should obtain professional advice before acting. TaxYork accepts no liability for action taken in reliance on this material.