.png)
If you think you have overpaid tax, the next question is simple: how do you actually get your money back?
The answer depends on why the overpayment happened. HMRC does not use one single refund process for everyone. A PAYE worker with a P800, a self-employed taxpayer filing Self Assessment, and an employee claiming tax relief on work expenses may all follow different routes. HMRC’s official checker helps point taxpayers to the right method.
Before you claim, work out which category fits your situation best.
You may be due a refund because:
This first step matters because claiming through the wrong route can slow everything down.
GOV.UK has a “Check how to claim a tax refund” service that directs you to the correct process based on your circumstances. This is the best starting point for most people because it reduces guesswork and takes you to the right HMRC pathway.
The exact evidence depends on the refund type, but HMRC may ask for details such as:
Good records can make the difference between a straightforward repayment and a drawn-out claim.
A P800 is HMRC’s end-of-year tax calculation showing whether you underpaid or overpaid tax. If it says you are due a refund, the letter will explain what happens next. In some situations HMRC issues the refund without you needing to do anything further. In others, you follow the instructions to claim it.
Self Assessment taxpayers claim refunds through the tax return process. HMRC’s guidance on Self Assessment refunds explains how repayments are handled after the return is submitted and processed.
Employees may claim relief for qualifying expenses they had to pay themselves. HMRC’s online guidance covers categories such as uniforms, tools, mileage, professional subscriptions, and working from home. HMRC also notes that if you complete Self Assessment, you generally must claim through your tax return instead.
HMRC provides a separate route for reclaiming tax deducted from savings and investment income, including use of form R40 in appropriate cases.
Before submitting anything, make sure your personal details and bank details are accurate in your HMRC account. Many repayment delays are administrative rather than technical. You should also review your tax code and recent tax documents to confirm the overpayment position makes sense. HMRC’s income tax enquiries guidance covers support for coding notices and claiming tax back on interest.
A standalone employee-expenses claim is not the same as a Self Assessment repayment, and neither is the same as a P800 refund. Starting in the wrong place often creates confusion.
Not every cost connected to work is tax-deductible. HMRC’s guidance is specific about what can and cannot be claimed.
Always use official GOV.UK pages and your HMRC account, not unsolicited messages claiming you are due money.
A refund solves the past overpayment, but a bad tax code can cause the same issue again. HMRC’s income tax support covers coding notices as well as tax back queries.
Claiming a tax refund from HMRC is usually easier when you separate the issue into the right category first. Once you know whether the refund is about PAYE, P800, Self Assessment, work expenses, or savings income, the correct HMRC path becomes much clearer.
Use HMRC’s official checker first, then follow the route for your refund type.
No. A P800 is only one refund scenario. Other claims can relate to Self Assessment, job expenses, or savings tax.
Yes, where the expenses are allowable and were paid personally.
Then you usually claim your refund through Self Assessment.
Our latest news and trending topics
