TL;DR
- HMRC issues tax refunds when more tax has been deducted than is owed for the tax year.
- Common reasons include an emergency tax code, stopping work mid-year, or unclaimed tax relief on expenses.
- Claim online via GOV.UK personal tax account or by post using form R40 for repayment claims.
- HMRC refunds typically take 5 working days to process for online claims; up to 8 weeks for postal.
- Tax refund companies charge up to 50% of your rebate: HMRC claims are free to make directly.
- You can reclaim tax for up to 4 tax years: the 2026/27 deadline for 2022/23 is 5 April 2027.
Key Facts
When Does HMRC Owe You a Tax Refund?
HMRC owes a tax refund when more income tax has been collected from a taxpayer than is owed for the tax year. This happens more commonly than many people realise. The most frequent causes are an emergency tax code applied when starting a new job, which taxes income at the basic rate without applying the personal allowance; stopping work partway through the tax year before earning the full personal allowance; receiving a pension payment after leaving employment; claiming a marriage allowance or blind person allowance that was not applied during the year; or having tax deducted from savings interest or PPI compensation above the Personal Savings Allowance.
HMRC sometimes identifies overpayments automatically at the end of the tax year and issues a P800 tax calculation showing the overpaid amount. The P800 invites the taxpayer to claim the refund online through their personal tax account. However, HMRC does not always identify overpayments automatically, particularly where the overpayment arises from expenses or reliefs that the taxpayer must claim proactively.
What Can You Reclaim?
The most common refund claims are as follows. Emergency tax code overpayments are very common when starting a new job or receiving a pension for the first time. The emergency code taxes each pay period in isolation without applying cumulative allowances, often resulting in significant overpayment that is resolved when HMRC issues the correct code. If not resolved automatically, the refund must be claimed.
Work expenses and professional subscriptions: employees who pay for equipment, uniforms, tools, professional subscriptions, or other allowable expenses out of their own pocket and without reimbursement can claim tax relief on those costs. HMRC provides flat-rate expense allowances for many occupations, covering items like tools, uniforms, and mileage. The relief is worth 20% of the expense cost for a basic rate taxpayer.
Marriage Allowance: a basic rate taxpayer can transfer 1,260 pounds of their unused personal allowance to a higher-earning spouse or civil partner, saving up to 252 pounds in tax per year. The allowance can be backdated for up to 4 years, producing a one-off refund of up to 1,008 pounds in addition to the annual saving.
Higher-rate pension contributions: basic rate tax relief on pension contributions is claimed automatically through the pension provider. Higher-rate taxpayers are entitled to an additional 20% relief on contributions but must claim this through a self-assessment tax return or by contacting HMRC. Many higher-rate taxpayers who do not complete a tax return miss this relief entirely.
Savings interest: for most taxpayers, savings interest is paid gross and the taxpayer must pay any tax owed through self-assessment or PAYE adjustment. Where tax has been incorrectly deducted from savings interest, it can be reclaimed using form R40.
How to Claim a Tax Refund from HMRC
The simplest route is the HMRC personal tax account at GOV.UK. Log in using your Government Gateway credentials. The personal tax account shows your current tax position, any P800 notices issued, and allows you to submit repayment claims online. Online claims are processed in approximately 5 working days and the refund is paid directly into your bank account.
If you do not have a Government Gateway account, you can set one up at GOV.UK using your National Insurance number, passport or driving licence, and a recent payslip or P60. The process takes approximately 15 minutes.
For savings interest overpayments, use form R40 available from GOV.UK. For employment expense claims not covered by the online service, use form P87. For self-assessment taxpayers, include all relevant claims in the annual tax return.
How Long Does an HMRC Tax Refund Take?
Online claims submitted through the personal tax account typically take approximately 5 working days to process and reach the bank account. Postal claims take significantly longer, typically 4 to 8 weeks depending on HMRC workload. Complex cases or claims requiring manual review take longer. HMRC publishes current processing times on GOV.UK and these fluctuate, particularly around self-assessment deadlines in January and April when volumes are high.
Tax Refund Companies: Avoid Paying for a Free Service
A significant industry of tax refund companies has developed in the UK, advertising services to help taxpayers claim HMRC refunds. These companies charge fees ranging from 25% to 50% of the refund amount, sometimes in addition to fixed administrative fees. Submitting a tax refund claim directly to HMRC through the personal tax account or by post is entirely free. The same forms and processes used by refund companies are publicly available on GOV.UK at no cost. There is no scenario in which using a tax refund company produces a better financial outcome than claiming directly.
Some refund companies use aggressive marketing and may submit claims on behalf of taxpayers without making the fee structure sufficiently clear. HMRC has taken steps to limit the ability of third parties to claim refunds on behalf of taxpayers, but the industry continues to operate. If you receive unsolicited contact from a company offering to claim a tax refund on your behalf, be aware that the service is free to do yourself.
Time Limits for Claiming
Tax refund claims can be made for up to 4 tax years before the current year. In the 2026/27 tax year, claims can be made back to the 2022/23 tax year. The deadline for claiming a 2022/23 refund is 5 April 2027. Claims submitted after this date for that year will not be accepted. Keep P60s, P45s, payslips, and records of allowable expenses for at least 4 years to support any future claim.
Frequently Asked Questions
How do I claim a tax refund from HMRC?
The quickest route is through the HMRC personal tax account at GOV.UK. Online claims are processed in approximately 5 working days. Postal claims using forms P87 or R40 take 4 to 8 weeks. The process is entirely free.
How long does an HMRC tax refund take?
Online claims typically take approximately 5 working days. Postal claims take 4 to 8 weeks. Complex cases requiring manual review take longer. Check current HMRC processing times on GOV.UK.
Can I claim tax back for previous years?
Yes, for up to 4 tax years. In 2026/27 you can claim back to 2022/23. The deadline to claim 2022/23 tax is 5 April 2027. Keep P60s, P45s, and expense records for at least 4 years.
Should I use a tax refund company?
No. Tax refund companies charge 25% to 50% of your refund for a service that is entirely free to do yourself through the HMRC personal tax account at GOV.UK. The same forms are publicly available.
What is an emergency tax code?
A temporary code (W1 or M1) that taxes each pay period in isolation without applying cumulative annual allowances. It is commonly applied when starting a new job before HMRC receives the correct tax information. It often results in overpayment that is refunded either automatically or by claiming through the personal tax account.
