Tax Refunds & Overpayments

If you have paid too much Income Tax, National Insurance, Capital Gains Tax, or other taxes through PAYE or Self Assessment, you are entitled to a refund from HMRC. This guide explains how to check whether you have overpaid, how to claim a refund, how long HMRC takes to process it, and how to protect yourself from tax refund scams.

Common Reasons for Overpaying Tax

Tax overpayments happen for many reasons. You may have been put on the wrong tax code (for example, an emergency code when you started a new job). You may have stopped working partway through the tax year and used up less than your full Personal Allowance. You may have overpaid through Self Assessment because your actual income was lower than expected. You may have paid tax on savings interest that should have been covered by your Personal Savings Allowance. You may have made pension contributions or Gift Aid donations that increased your tax relief. You may have been repaying a student loan through your wages after the loan was already fully repaid. If any of these apply, check whether HMRC owes you money.

How to Check Your Tax Account

The easiest way to check for overpayments is through your personal tax account on GOV.UK. Log in with your Government Gateway ID, go to the "PAYE" section, and check your tax code and estimated tax position for the year. You can also check your Self Assessment account if you file returns. If HMRC thinks you have overpaid, they will usually issue a refund automatically within a few weeks of the end of the tax year. However, you should not rely on this — it is wise to check your account after 5 April each year, especially if your circumstances changed during the year. If your tax code is wrong, you can correct it online, and HMRC will recalculate your tax automatically.

How to Claim a Refund

If HMRC does not issue an automatic refund, you can claim manually. For PAYE overpayments, log into your personal tax account and check the "tax code" section. If your code is wrong, use the "tell HMRC about a change" function. For Self Assessment overpayments, the refund is calculated automatically when you file your return. If you are due a refund, you can choose to have it paid directly into your bank account (within a few working days) or by cheque (which takes longer). You can also apply by post using form R40 if you are not registered for online services. If you are claiming a refund for a tax year more than four years ago, you may be out of time — the general time limit for claiming a refund is four years from the end of the relevant tax year.

Processing Times

HMRC aims to process refunds within six to eight weeks for straightforward claims. If you file your Self Assessment return in April or May (early in the tax year), the refund should arrive by July or August. Online refunds to your bank account are faster than cheques. If you have not heard from HMRC within eight weeks, contact the relevant helpline. For PAYE refunds, the process is usually completed by July following the end of the tax year. If your claim is more complex — for example, involving multiple years or disputed tax codes — it may take longer. You can check the status of your claim through your personal tax account.

Tax Refund Scams to Avoid

HMRC never contacts taxpayers by email, text, or phone to tell them they are due a refund and ask for bank details. If you receive an unsolicited email or text message claiming to be from HMRC Refunds, HMRC Tax Credits, or similar, it is a scam. Do not click any links, do not enter your bank details, and report it to HMRC at phishing@hmrc.gov.uk. Common scams include fake refund websites that look like the GOV.UK login page, phone calls from people claiming to be HMRC officers demanding payment or offering refunds, and text messages with links to fraudulent sites. HMRC only processes refunds through your official Government Gateway account or by posting a cheque to your registered address. If in doubt, log directly into your HMRC account — do not use a link from an email or message.

Using a Tax Refund Company

Some companies offer to claim your tax refund for a fee (typically 20–30% of the refund amount). You do not need to use these companies. Claiming a refund from HMRC is free and straightforward, especially if you have a Government Gateway account. The only time you might consider using an agent is if your tax affairs are complex and you need professional advice — but even then, a qualified accountant or tax adviser should charge a reasonable hourly rate rather than a percentage of your refund. HMRC's own guidance strongly recommends claiming directly.

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