R43 Tax Form: Non-Resident UK Tax Refund, Allowance, and Treaty Relief

The R43 tax form is what non-UK residents use to reclaim overpaid UK income tax and to claim UK personal allowances against income from UK sources. HM Revenue and Customs accepts R43 claims for the current tax year and the four previous tax years, so if UK tax was deducted from your pension, dividends, interest, or other UK income while you were living abroad, you can go back a reasonable stretch to recover it.¹ If your total UK income for a given year is below the personal allowance of £12,570, or a double taxation treaty gives you relief, HMRC likely owes you money.

Who Can File R43

The form is for people who are not UK residents for tax purposes but still receive UK-source income: dividends from UK companies, interest from UK banks, UK pensions, state benefits, royalties, or distributions from UK unit trusts and investment companies.¹ Tax is often withheld at source before that money reaches you, and R43 is the mechanism for getting the excess back.

Entitlement to the UK personal allowance depends on your status. Section 56 of the Income Tax Act 2007 sets out the qualifying groups:²

UK or EEA nationals, including residents of the Isle of Man and Channel Islands.
Former UK residents who moved abroad for their own health or that of a family member living with them.
Current or former Crown servants, and those serving in UK-protected territories or missionary societies.
Widows, widowers, or surviving civil partners of someone who served the Crown.
Residents of a country that has a double taxation agreement with the UK, where the treaty grants allowances.

A US citizen living in the United States, for example, typically qualifies through the US-UK double taxation treaty rather than through EEA nationality. HMRC may ask for proof of residence in the treaty country, which for Americans means IRS Form 6166, a letter certifying US tax residency. The IRS charges $85 per individual application for that certificate.³

When R43 Is Not the Right Form

Some non-residents have to file a Self Assessment return instead. That applies if you have UK rental income above £2,500, or income from a trade, vocation, or profession.¹ Anyone letting out a former UK home after moving abroad tends to cross that threshold quickly. If you already file a Self Assessment return, you claim the refund through that return, not through a separate R43.

How the Personal Allowance Works

The UK personal allowance is the slice of income you can receive before income tax applies. It has been frozen at £12,570 since April 2022 and is set to stay there through at least the 2027/28 tax year.⁴ If your total UK income sits below £12,570 and you qualify for the allowance, all the tax deducted at source should come back.

Even when UK income exceeds the allowance, claiming it reduces the taxable portion. A £20,000 UK pension, for instance, would leave £7,430 subject to tax after applying the full allowance. Without an R43 claim, tax would apply to the entire £20,000.

What to Gather Before You Start

HMRC’s online R43 cannot be saved partway through, so pull everything together before you open it.¹ You’ll need:

Your UK National Insurance number or Unique Taxpayer Reference, if you have one.
Every UK income figure for the tax year, broken down by category (dividends, bank interest, pensions, state benefits, trust income, life insurance proceeds, other UK sources), with the gross amount, the tax deducted, and the net received for each.⁵
Your worldwide income from all sources, including income that never reached the UK. HMRC uses this to verify allowance entitlement.
Proof of tax residency if you’re claiming under a treaty. US residents use IRS Form 6166.⁶

If you left the UK partway through a tax year, report income for the full year (6 April to the following 5 April), including what you earned before departure.¹ Married couples and civil partners are treated separately for UK tax; each partner files their own R43.

Mismatched figures are a common cause of delay. If the income and tax you report don’t line up with what UK banks and pension providers already told HMRC, the claim stalls. Work from your tax certificates and annual statements rather than estimating from bank transactions.

Submitting the Form

You can complete R43 online through GOV.UK. The form is interactive, but as noted, it cannot be saved, so finish it in one sitting.¹

If you’d rather work on paper, download the PDF and the accompanying guidance notes from GOV.UK.⁷ Complete it, sign it, and post it to:

Pay As You Earn
HM Revenue and Customs
BX9 1AS
United Kingdom⁸

Mailing from abroad, a tracked service is worth the small extra cost. International mail to UK government offices occasionally goes astray, and resubmitting a lost form adds months. Use the version of the form that matches the tax year you’re claiming for, not the current year’s version for older years.

Deadlines and One Form Per Year

Claims are open for the current tax year and any of the four previous tax years.¹ In the 2026/27 tax year, that reaches back to 2022/23. Once a year drops outside that window, the refund is gone. If you’ve been abroad for several years and never filed, prioritise the oldest year still open.

Each tax year needs its own R43. Three years of unclaimed refunds means three separate forms, each on the version that matches its year.

After You Submit

HMRC checks your figures against the records UK institutions have already filed. Processing times shift with volume, and HMRC publishes current expected response times on GOV.UK. The period around the end of the tax year in April tends to run slower.

If HMRC approves the claim and there’s been a delay, repayment interest is added. As of January 2026, the income tax repayment interest rate is 2.75%, calculated as the Bank of England base rate minus 1% with a floor of 0.5%.⁹ Interest is modest on most single-year refunds, but it can add up on a multi-year claim.

Refunds to non-residents have historically been issued by cheque in British pounds. You can nominate a UK-based representative to receive the payment on your behalf. If you live somewhere that cashing a sterling cheque is expensive or slow, a UK nominee can save you bank fees.

Getting the Numbers Right

HMRC treats inaccurate repayment claims as penalty matters. Schedule 24 of the Finance Act 2007 scales the penalty to the nature of the error: careless mistakes attract up to 30% of the tax overclaimed (dropping to zero if you spot and disclose the error yourself), deliberate inaccuracies run from 20% to 70%, and deliberate and concealed inaccuracies from 30% to 100%.¹⁰ Because R43 claims involve offshore matters, penalties can reach up to 200% of potential lost revenue in the most serious cases. Honest mistakes made with reasonable care attract no penalty. The practical guard is accurate records: don’t guess, and don’t round in your favour.

Treaty Relief Alongside the Allowance

If your country of residence has a UK double taxation treaty, certain types of UK income may qualify for a reduced tax rate or full exemption. The R43 guidance notes flag pensions, interest, royalties, and certain flexible pension payments as income types where treaty relief commonly applies.⁷ The detail depends on the specific treaty.

Treaty relief and the personal allowance do different jobs. The allowance reduces your taxable income; treaty relief can lower the tax rate on what remains. Check both. HMRC’s guidance recommends confirming whether your country has a treaty before starting the form, because treaty benefits sometimes mean the income should not have been taxed at the standard UK rate to begin with.¹

What US Filers Need to Do After a UK Refund

Americans who previously claimed UK income tax as a foreign tax credit on IRS Form 1116 have follow-up work. An HMRC refund is a “foreign tax redetermination” under US tax law, because foreign taxes you credited have been partially or fully refunded.¹¹

You generally have to file Form 1040-X, an amended return, to reduce the foreign tax credit for the year the UK tax was originally paid. You also attach Schedule C of Form 1116 to your current-year return, summarizing the redetermination and identifying the prior years affected.¹² If the redetermination doesn’t change your US tax liability, for example because you had excess foreign tax credits, you can skip the amended return and report the change on Schedule C with your current-year filing.

Failing to notify the IRS of a foreign tax redetermination can trigger a separate penalty.¹¹ The amounts can be small, but the IRS expects the notification regardless. If you claimed the UK tax as a deduction rather than a credit, you’d instead amend to reduce the deduction for the relevant year. Either way, an R43 refund carries a US-side consequence that’s easy to miss.

1
GOV.UK. Claim Personal Allowances and Tax Refunds if You Live Abroad (R43)
2
Legislation.gov.uk. Income Tax Act 2007 Section 56
3
Internal Revenue Service. Instructions for Form 8802
4
GOV.UK. Income Tax Personal Allowance and the Basic Rate Limit From 6 April 2026 to 5 April 2028
5
HM Revenue and Customs. R43 – Claim to Personal Allowances and Tax Repayment by an Individual Not Resident in the UK
6
Internal Revenue Service. Form 6166 – Certification of US Tax Residency
7
HM Revenue and Customs. Guidance Notes for Form R43
8
GOV.UK. Repayments: Where to Send Claim Forms
9
HM Revenue and Customs. HMRC Interest Rates for Late and Early Payments
10
Legislation.gov.uk. Finance Act 2007 Schedule 24
11
Internal Revenue Service. Foreign Tax Credit
12
Internal Revenue Service. Instructions for Form 1116