How to claim a UK tax refund

The four refund routes — at a glance

UK tax refunds come back through one of four channels:

1. P800 reconciliation (automatic, most common). HMRC's annual reconciliation runs each summer using employer P60 / RTI data. If you've over-paid PAYE and HMRC's records are clean, you'll get a P800 letter between June and October showing the refund amount.
2. Online via your Personal Tax Account (fastest, in-year). For situations HMRC's automatic system catches but you can claim back faster — most commonly emergency-coded pension lump sums.
3. R40 paper form (savings interest over-tax). For pensioners and non-Self-Assessment taxpayers who have had tax wrongly deducted from savings or investment income.
4. Self Assessment refund (any over-payment shown on a return). If you file Self Assessment, any refund due is shown on the SA302 calculation and paid into the bank account on file.

Route 1 — Wait for a P800 (most common, takes longest)

HMRC reconciles every PAYE taxpayer's records after the tax year ends on 5 April. The reconciliation cross-references employer-reported pay (RTI) with your individual tax code and any benefits-in-kind. If you over-paid, you receive a P800 letter — usually between June and October.

The P800 will say one of:

• "You can claim your refund online" — fastest. Log into your Personal Tax Account, click "Claim your refund", and HMRC pays it within 5 working days to the bank account you specify.
• "We will send you a cheque" — usually if you don't claim online within 21 days. Cheques arrive within 6 weeks of the P800 and can only be paid into a UK bank account in the same name as the taxpayer.

If you haven't received a P800 by the end of October but think you over-paid, log into the Personal Tax Account and check "View your tax record" — sometimes the letter is in the digital inbox even if no paper copy arrived.

Route 2 — Online claim via Personal Tax Account (fastest, in-year)

Three specific situations are handled inside Personal Tax Account without waiting for P800 reconciliation:

• Pension lump sum emergency tax. If your first taxable pension drawdown was emergency-coded (almost all are), the refund is usually £4,000–£10,000 and you don't need to wait until summer. Use HMRC forms P55 (flexibly accessed pension, no other income), P53Z (flexibly accessed, with other income), or P50Z (lump sum with no other income for the year). The pension drawdown tax calculator shows the typical refund size.
• Stopped working part-way through the year. If you left a job and won't earn enough in the rest of the year to use your full personal allowance, file form P50 for an in-year refund. Don't wait until April.
• Marriage Allowance backdated. If you've never claimed Marriage Allowance and you're eligible, you can backdate it four tax years. The refund for four years is up to £1,008.

To claim online, you need a Government Gateway login. If you don't have one, sign up at gov.uk/personal-tax-account — you'll need your NI number, a UK passport or recent payslip, and a smartphone for the verification.

Route 3 — R40 form (savings interest over-tax)

R40 is the form to use when you've had tax wrongly deducted from interest on savings, dividends from peer-to-peer platforms, or other UK investment income — and you don't already file Self Assessment. The most common case: a non-taxpayer (pensioner with low income, child with savings, partner with no salary) who has had 20% tax taken at source from interest by a building society or P2P platform that didn't realise they shouldn't have.

Submit one R40 per tax year. Refunds via R40 take 6–12 weeks. Send it with photocopies (not originals) of the certificates of tax deducted from each provider. The savings interest tax calculator works out who actually owes savings tax in the first place.

Route 4 — Self Assessment refund

If you file Self Assessment for any reason — self-employment, rental income, high income, capital gains — any over-payment of PAYE is rolled into the SA302 calculation. Refunds usually land in the nominated bank account within 5–10 working days of the return being processed (i.e. within 2–3 weeks of submission).

Common reasons a Self Assessment shows a refund:

• Higher-rate pension tax relief on personal pension contributions (the basic 20% comes back automatically; the extra 20–25% requires SA).
• Charitable Gift Aid donations claimed at higher rate.
• Marriage Allowance not yet processed elsewhere.
• Mid-year job change with too-high PAYE deductions in early months.
• EIS, SEIS, VCT or SITR investment relief — these are SA-only routes.

The mistakes that cost people refund money

• Ignoring HMRC letters. A P800 has a 21-day deadline for online refund claims; miss it and HMRC defaults to a paper cheque (slower) or, in some cases, applies the refund to the next year's tax bill (which means you wait 12+ months).
• Wrong bank account on Personal Tax Account. The bank account must be in the same name as the taxpayer. Joint accounts are usually fine but only if your name is first on the account.
• Forgetting that some refund routes are mutually exclusive. If you've filed Self Assessment, all your year's refunds go through the SA process — you can't also claim a P55 pension refund separately.
• Using the wrong P-form for pension lump sums. P55, P53Z and P50Z look similar but apply to different situations. Wrong form = rejection and a 6-week delay.
• Refund scams. HMRC will never text or email asking for your bank details to "release a refund". If you get one, it's a scam — see the scam and fraud defence centre for how to report.

Realistic timelines

Sources

HMRC: Claim a tax refund · P55 form for pension flexibility refunds · R40 — claim a refund of tax on savings.

Related on this site

• How to read a P60 — every box explained
• How to claim a UK tax refund in 2026/27
• P60 vs P45 vs P11D — the difference, in plain English
• Five P60 mistakes that quietly cost you money
• Emergency tax and refund checker
• Tax code decoder
• UK tax calculator 2026/27