How UK tax refunds work and who can claim them

A tax refund happens when you have paid more tax to HMRC (Her Majesty's Revenue and Customs) than you actually owed. The government then returns the overpayment to you. Most people get refunds automatically — your employer adjusts your tax code, or HMRC sends you a cheque without you asking. But if you are self-employed, have multiple jobs, or have stopped working partway through the tax year, you may need to claim the refund yourself.

The UK tax year runs from 6 April to 5 April the following year. HMRC processes most refunds within four to six weeks of receiving a valid claim, though this can vary depending on how you submit it and whether they need more information from you.

Key Takeaways

  • Most employees receive refunds automatically through their tax code, but self-employed people and those with multiple jobs often need to claim manually.
  • You can claim a refund up to four years after the end of the tax year in which you overpaid, so there is no rush to claim when ready.
  • HMRC will ask for evidence of the tax you paid — payslips, P60 forms, or self-assessment records — so gather these before you start.
  • The fastest way to claim is through your personal tax account on the HMRC website if you have one, or by post if you do not.

Check whether you have actually overpaid tax

Before claiming, you need to know whether HMRC owes you money. If you are employed and your employer has been taking tax from your wages, check your most recent payslip. It will show your cumulative tax paid for the year so far. Compare this to what you should have paid based on your salary and personal allowance (the amount you can earn tax-free each year, currently £12,570 for most people, though this varies if you are over 65 or have certain types of income).

If you are self-employed, you will know whether you overpaid when you complete your self-assessment tax return. HMRC will calculate what you owe and tell you if you have paid too much. If you have stopped working during the tax year, you may have overpaid because your employer took tax as if you would work the full year.

You can also use HMRC's online tax calculator or contact them directly to ask whether a refund is due. Their phone number is 0300 200 3300, though wait times can be long.

Gather the documents HMRC will need

HMRC will ask you to prove how much tax you paid. The documents you need depend on your situation. If you are employed, collect your payslips from the tax year in question and your P60 form (issued by your employer at the end of the tax year, usually by 31 May). If you have had multiple jobs, you will need payslips and a P60 from each employer.

If you are self-employed, you will need your self-assessment records, including your tax return and any evidence of tax payments you made (bank statements showing payments to HMRC, or receipts). If you have claimed expenses, keep the invoices and receipts that back those up, as HMRC may ask to see them.

If you have received other income — from savings interest, rental property, or investments — gather statements showing what you earned and any tax already taken from it. Do not send original documents to HMRC unless they specifically ask; keep copies for your records.

Claim through your personal tax account (fastest route)

If you have a personal tax account on the HMRC website, you can claim a refund online. Log in with your Government Gateway ID (the username and password you use to access your tax information). Once logged in, look for the section about tax refunds or overpayments — the exact wording changes, but it is usually under "Your tax account" or "Payments".

You will be asked to enter details of the tax you paid and the reason you believe you have overpaid. Attach scans or photos of your payslips, P60, or other supporting documents. HMRC will review your claim and contact you if they need more information. This route usually takes four to six weeks.

If you do not have a personal tax account, you can create one on the HMRC website using your National Insurance number and postcode. You will need to prove your identity, which usually means answering security questions based on your credit file.

Claim by post if you cannot use the online system

If you do not have internet access or prefer to claim by post, write a letter to HMRC setting out why you believe you have overpaid. Include your name, address, National Insurance number, and the tax year you are claiming for. Explain clearly how much tax you paid and why you think it was too much — for example, "I left my job on 30 September 2023 and my employer took tax as if I worked the full year" or "I had two jobs and paid tax twice on my personal allowance".

Attach copies of your payslips, P60, or other evidence. Do not send originals. Address your letter to HMRC Self Assessment, HM Revenue and Customs, BX9 1AS. Keep a copy for yourself and consider sending it by recorded delivery so you have proof it arrived.

Post claims take longer than online claims — typically eight to twelve weeks — because HMRC has to manually process them.

What happens after you submit your claim

HMRC will review your claim and either approve it, ask for more information, or reject it. If they approve it, they will send the refund to your bank account (if you have provided one) or by cheque. The refund goes to the bank account you used to pay tax, or the one you registered with HMRC if you are self-employed.

If HMRC asks for more information, they will write to you explaining what they need. Respond as quickly as you can — delays in replying can slow down the whole process. If they reject your claim, they will explain why and tell you how to appeal if you disagree.

If you are claiming for a year more than four years ago, HMRC may refuse the claim because the time limit has passed. However, you can still ask them to consider it if you have a good reason for the delay — for example, if you were abroad or seriously ill.

Refunds for VAT and other taxes

This guide covers income tax refunds. If you are claiming a VAT refund as an international visitor (which is what brought you here), that is a different process run by customs agents and retailers, not HMRC directly. If you are claiming a refund of another tax — such as stamp duty or inheritance tax — contact HMRC directly on 0300 200 3300 to find out the correct procedure.

Frequently Asked Questions

How long do I have to claim a refund?

You can claim a refund up to four years after the end of the tax year in which you overpaid. For example, if you overpaid in the 2022–23 tax year (which ended 5 April 2023), you can claim until 5 April 2027. There is no penalty for claiming late within this window.

Will I get interest on my refund?

HMRC does not pay interest on overpaid tax unless the overpayment was caused by an error on their part. If you have overpaid because of your own circumstances — such as leaving a job early — you will receive only the amount you overpaid, not interest on top.

What if HMRC says I do not have a refund coming?

If HMRC rejects your claim, ask them to explain why in writing. Common reasons include: you have not actually overpaid, the time limit has passed, or you have not provided enough evidence. You can appeal their decision, and HMRC will tell you how to do this in their letter.

Can I claim a refund if I am not a UK resident?

Yes, but the process is more complex. You will need to prove your identity and may need to provide additional documents. Contact HMRC on 0300 200 3300 or visit their website for guidance on non-resident claims, as the rules depend on your visa status and tax residency.

Do I need an accountant to claim a refund?

No. Most people can claim a refund themselves by gathering their payslips and writing to HMRC or using their online account. You only need an accountant if your tax situation is very complicated — for example, if you have significant self-employment income or multiple sources of income across different countries.