Reclaim
TL;DR
HMRC will refund overpaid income tax automatically in many cases via PAYE or after self-assessment. Common reasons for overpayment include emergency tax on pension withdrawals, leaving a job mid-year, and marriage allowance transfers. Most PAYE refunds are processed within four to eight weeks. You can check your tax position and claim online via your personal tax account at gov.uk. Do not use a tax refund company - HMRC refunds are free.
Overpaying income tax is more common than many people realise. HMRC estimates that millions of PAYE employees are on the wrong tax code at some point, and pension drawdown withdrawals are routinely overtaxed due to emergency coding in the first payment of the tax year. In most cases HMRC identifies and corrects these overpayments automatically, but in some situations you need to actively claim a refund to get your money back promptly rather than waiting for the end-of-year reconciliation process.
The tax refund claim industry has grown significantly in the UK, with companies charging fees of 25-50% of the refund for claims that can be made for free directly with HMRC. HMRC refunds do not require any intermediary. All PAYE and self-assessment refunds can be claimed directly through your personal tax account at gov.uk, by phone with HMRC, or by submitting a claim form. This guide covers the main situations that lead to overpayment, how to claim, and how long refunds take.
Key facts (2026)
- HMRC automatically reconciles PAYE tax for most employees at the end of each tax year through the P800 process; overpayment refunds are issued automatically where HMRC has all the required data (HMRC).
- Pension drawdown emergency tax: the first flexible pension withdrawal in a tax year is often taxed using an emergency tax code (Month 1 basis), which can result in significant over-deduction; reclaim using forms P55, P53Z, or P50Z depending on circumstances (HMRC).
- Marriage Allowance transfer allows a spouse or civil partner who earns below the personal allowance to transfer up to £1,260 of their unused allowance to the higher-earning partner, reducing the tax bill by up to £252 per year (HMRC).
- HMRC's standard PAYE refund processing time is four to eight weeks from receipt of a claim; self-assessment refunds issued within five working days of the return being processed (HMRC).
- You can backdate a tax refund claim up to four tax years before the current year; claims for 2021/22 must be submitted by 5 April 2026 (HMRC time limit for error or mistake relief).
Common reasons for income tax overpayment
The most frequent causes of income tax overpayment include: wrong tax code applied by the employer - for example, carrying forward a previous employer's code, or HMRC issuing an emergency code (BR or W1/M1) when a new employment starts; leaving a job mid-tax year without using the full personal allowance - you pay tax on your full annual income basis but if you do not earn again that year, you are entitled to the full £12,570 allowance spread across the year; pension drawdown emergency tax, where the first flexible withdrawal is taxed as if it is the only payment in the year repeated monthly, resulting in over-deduction; working from home tax relief claims for expenses not already reimbursed by the employer; marriage allowance not yet applied; and higher rate taxpayers not claiming additional pension tax relief where contributions are into a relief at source scheme that only applies basic rate relief automatically.
How to check your tax code and spot an error
Your tax code appears on your payslip and on any P60 or P45 issued by your employer. The standard code for most employees in 2025/26 is 1257L, reflecting the £12,570 personal allowance. A code of BR means you are being taxed at basic rate on all income with no personal allowance applied, which is typically wrong unless you have multiple jobs and have already allocated your allowance elsewhere. A code ending in W1 or M1 means you are on a non-cumulative emergency basis, where each payment is taxed in isolation rather than cumulatively across the year, which can cause over- or under-deduction depending on your earnings pattern. Check your tax code at gov.uk/check-income-tax-current-year using your personal tax account login. If the code is wrong, contact HMRC online or by phone to have it corrected; the correction usually takes effect in the next payroll run.
Reclaiming pension drawdown emergency tax
When you take the first flexible (taxable) withdrawal from a pension, the pension provider applies PAYE using whichever tax code HMRC has issued or, if none is available, an emergency code on a Month 1 basis. Month 1 emergency coding taxes each payment as if it is one-twelfth of an annual payment at that level, ignoring cumulative earnings and reliefs for the year. This frequently causes substantial over-deduction, particularly on large lump sum withdrawals. HMRC provides three claim forms to reclaim the excess: P55 for a partial withdrawal where the pension pot is not fully emptied; P53Z for a full withdrawal with other income in the year; and P50Z for a full withdrawal with no other income. Submit the appropriate form to HMRC directly after the withdrawal; refunds are typically processed within four to eight weeks. Do not wait for the end-of-year P800 reconciliation if the overpayment is large; HMRC allows in-year reclaims specifically for this situation.
Marriage Allowance and other allowance transfers
The Marriage Allowance allows one spouse or civil partner who earns below the personal allowance (£12,570 in 2025/26) to transfer up to £1,260 of their unused personal allowance to the other partner. This reduces the recipient's tax bill by up to £252 per year (20% basic rate on £1,260). Both partners must be basic rate taxpayers; the transfer is not available if either is a higher rate taxpayer. Apply online at gov.uk/marriage-allowance. The allowance can be backdated up to four years, so if you have been eligible but not claimed, you could reclaim up to four years of missed allowance - a potential total refund of up to approximately £1,000 depending on the years involved. The transfer remains in place until cancelled; HMRC adjusts the tax codes of both partners automatically each year.
Tax refund companies: why you do not need one
Tax refund companies advertise widely and offer to claim tax refunds on your behalf, typically charging 25-50% of the refund amount plus VAT. In some cases they have had customers sign assignments of their HMRC repayments, meaning the refund goes to the company rather than to the customer. HMRC has warned specifically about this practice. All HMRC tax refunds can be claimed directly at no cost through your personal tax account at gov.uk, by phone to HMRC's income tax helpline, or by completing the relevant claim form (R40, P55, P53Z, P50Z depending on the situation). There is no situation where a tax refund company is necessary for a standard PAYE or pension drawdown refund. If you have already signed an assignment with a refund company, contact HMRC to check whether the assignment has been registered and what your options are.
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Frequently asked questions
How do I claim a tax refund from HMRC?
Log in to your personal tax account at gov.uk using your Government Gateway credentials. From there you can check your tax position, see any P800 refund notices, and initiate a refund if one is owed. Alternatively, call the HMRC income tax helpline on the number listed at gov.uk/contact-hmrc. For pension emergency tax refunds, submit the relevant P55, P53Z, or P50Z form by post or online. For self-assessment taxpayers, refunds are triggered automatically when the return shows an overpayment.
How far back can I claim a tax refund?
You can backdate a refund claim up to four tax years before the current year. In 2026/27, you can claim back to 2022/23. Claims for 2021/22 had to be submitted by 5 April 2026. After the four-year limit, overpaid tax cannot generally be reclaimed. Marriage Allowance can similarly be backdated four years. Check your position for each relevant year using your personal tax account or ask HMRC.
My employer put me on an emergency tax code. What should I do?
Contact HMRC online or by phone to provide details of your income and employment. HMRC will issue an updated tax code to your employer, which should be applied in the next payroll run. In the meantime, any over-deducted tax will be recovered through HMRC's end-of-year reconciliation or you can claim it back via your personal tax account if you want the refund sooner. Check your payslip to confirm when the new code has been applied.
How long does an HMRC tax refund take?
PAYE refunds triggered by a P800 notice or online claim typically take four to eight weeks to process. Self-assessment refunds are issued within five working days of the return being processed. Pension emergency tax refund forms (P55 etc.) typically take four to six weeks. If you have not received a refund within eight weeks of submitting a valid claim, contact HMRC to check the status.
Do I need a tax refund company to get my money back?
No. All HMRC refunds for PAYE, pension drawdown, and marriage allowance can be claimed directly through gov.uk or by phone at no cost. Tax refund companies charge 25-50% of the refund for a service you can do yourself for free. Citizens Advice and HMRC's own guidance provide step-by-step support if needed.
How we verified this guide
All refund processes and timeframes were verified against HMRC income tax refund guidance, HMRC pension tax reclaim forms P55/P53Z/P50Z, HMRC Marriage Allowance guidance, and Citizens Advice tax rebate resources during May 2026. We do not accept payment from tax refund companies.
Primary sources
- HMRC - How to claim a tax refund
- HMRC - Marriage Allowance
- Citizens Advice - How to claim a tax refund
- MoneyHelper - Tax refunds explained
Last reviewed: May 2026.