You can check whether HMRC owes you a tax refund by logging into your Personal Tax Account at gov.uk, where HMRC shows your tax paid versus what you actually owed for the year. If you are employed, HMRC also sends a P800 letter after the tax year ends when it calculates that you have overpaid. Self-employed people check through their Self Assessment return. This guide explains how to check your refund status, how the refund process works, and what to do if you have not received money you are owed.
What is an HMRC Tax Refund?
A tax refund — sometimes called a tax rebate — is money HMRC returns to you when you have paid more Income Tax than you owed in a given tax year. It is not a bonus or a special scheme. It simply means the system collected too much from you at some point, and HMRC is giving it back.
This happens more often than people realise. Common causes include a wrong tax code on your payslip, stopping work before the end of the tax year, using an emergency code when you started a new job, or not claiming all the expenses you were entitled to as a self-employed person.
The current tax year runs from 6 April 2026 to 5 April 2027. HMRC usually begins sending out P800 tax calculation letters for the previous year between June and November, so if you are waiting to hear about the 2025 to 2026 tax year, those letters typically land from the summer onwards.
How Do I Know If HMRC Owes Me Money?
There are three main ways to find out.
1. Check Your Personal Tax Account Online
Your Personal Tax Account at gov.uk is the quickest way to see your tax position for the current and previous years. You can log in using your Government Gateway ID and password. Once inside, look for the section marked ‘Check your Income Tax’. It shows:
- Your tax code and Personal Allowance for the year
- How much Income Tax you have paid
- An estimate of whether you have overpaid or underpaid
- Any P800 calculations HMRC has already issued
If you do not have a Government Gateway account, you can create one on gov.uk in around ten minutes. You will need your National Insurance number and either a recent payslip, a P60, or a UK passport to verify your identity.
2. Wait for a P800 Letter
After each tax year ends in April, HMRC cross-references the income and tax figures it receives from employers through Real Time Information (RTI) with the tax it believes you should have paid. If the numbers do not match and you have overpaid, HMRC sends a P800 tax calculation letter by post.
The P800 will state clearly whether you are due a refund and how much it is. If the letter says a refund is due, you can either claim it online through the link in the letter (the fastest route) or wait for HMRC to send a cheque, which takes longer.
3. Review Your P60 Against Your Tax Paid
Your employer issues a P60 at the end of each tax year showing your total earnings and the total tax deducted. You can compare this against the tax HMRC says you should have paid based on your income and allowances. If the P60 shows more tax taken than you owed, a refund may be due. This is a useful manual check if you want to understand your position before a P800 arrives.
If you have not received a P800 and believe you have overpaid, do not assume you owe nothing. HMRC does not catch every overpayment automatically. You can contact HMRC directly or check your Personal Tax Account to initiate a review.
Does HMRC Automatically Refund Overpaid Tax?
Sometimes, but not always. The answer depends on how you pay your tax and what caused the overpayment.
For PAYE Employees
If you are employed and HMRC’s end-of-year reconciliation shows you have overpaid, it will usually issue a P800 automatically. If you claim the refund online, the money arrives in your bank account within five working days. If you do nothing, HMRC will send a cheque to your last known address, which takes longer and requires you to pay it into your bank.
However, HMRC’s automatic check relies on employers submitting accurate RTI payroll data. If your employer submitted incorrect figures, or if there were changes during the year that HMRC did not pick up, the reconciliation may be wrong or may not happen at all.
For Self-Employed and Self Assessment Filers
If you are self-employed or complete a Self Assessment return, HMRC does not automatically refund overpaid tax. Any refund due after your return is processed must be actively requested. You can do this through your Self Assessment online account on gov.uk, or by calling HMRC. The money is then paid directly into your bank account — or can be carried forward to offset your next tax bill if you prefer.
Common Situations – Auto-Refunded or Not?
| Reason for Overpayment | Who It Typically Affects | Auto-Refunded? |
|---|---|---|
| Wrong tax code applied by employer | PAYE employees | Usually yes — via P800 |
| Stopped work or changed jobs mid-year | Employees who left work before April | Usually yes — via P800 |
| Emergency tax code (M1 / W1 / BR) | New starters without a P45 | Usually yes — via P800 |
| Unused Personal Allowance | People who did not work the full tax year | Usually yes — via P800 |
| Expenses not claimed via Self Assessment | Sole traders and limited company directors | No — must claim via return |
| Pension income taxed incorrectly | Retirees drawing pension for first time | Usually yes — via P800 |
| CIS deductions exceeding tax liability | Construction workers under CIS scheme | No — must claim via return |
| Overpaid via Self Assessment | Self-employed and landlords | No — must request via SA |
Note: ‘Auto-refunded via P800’ means HMRC initiates the process — you still need to actively claim online or wait for a cheque.
How Do I Check the Status of My HMRC Refund?
Once you have claimed a refund, HMRC does not currently offer a live tracking tool the way a parcel delivery service does. However, there are three ways to keep tabs on your refund.
Check Your Personal Tax Account
Log into your Personal Tax Account and look under the Self Assessment or PAYE section depending on how you pay your tax. If a repayment has been processed, it will usually show there. You can also see whether a P800 has been issued and whether it has been actioned.
Call HMRC
If you have already claimed your refund and it has not arrived within the expected timeframe, you can call the HMRC income tax helpline on 0300 200 3300. Have your National Insurance number and, if relevant, your Government Gateway login details to hand. HMRC can confirm whether the repayment has been processed and give you a reference number.
Check Your Bank Account Directly
Bank transfer refunds from HMRC typically arrive within five working days of the claim being submitted online. If it has been longer than that and nothing has appeared, check that the bank details held in your Government Gateway account are correct. An outdated account number is one of the most common reasons a refund is delayed.
Watch out for fake HMRC refund texts and emails. HMRC will never contact you by text or email asking you to click a link to claim a tax refund. If you receive one of these, do not click anything. Report it to HMRC’s phishing email address: phishing@hmrc.gov.uk.
How Do I Get My HMRC Tax Refund?
The route you take depends on your situation. The table below summarises the main scenarios and what to do in each one:
| Your Situation | How to Claim | Timescale for Refund |
|---|---|---|
| Received a P800 — amount correct | Use the gov.uk link in the letter or your Personal Tax Account | 5 working days (bank transfer) |
| Received a P800 — amount wrong | Contact HMRC to query before claiming | Variable — pending correction |
| No P800 but believe you overpaid | Log into Personal Tax Account and check tax history | Up to 4 weeks after HMRC reviews |
| Self-employed — overpaid via SA | Request via Self Assessment return or call HMRC | Up to 4 weeks |
| CIS worker — deductions overpaid | Claim through Self Assessment tax return | Up to 6 weeks |
| Stopped working — in-year claim | Complete form P50 and send to HMRC | Up to 6 weeks |
| 4+ years old — last chance claim | Write to HMRC with calculation evidence | Variable — manual review |
Claiming Online After a P800 Letter
If you receive a P800 saying a refund is due, the online route is the fastest. The letter will include a link to gov.uk where you can claim. You will need to sign in with your Government Gateway account and confirm your bank details. Once submitted, the money should arrive within five working days.
Claiming Through Self Assessment
If you are self-employed or a director of a limited company and your tax return shows you have overpaid, you can request a refund through your online Self Assessment account. Log in at gov.uk, go to your tax return summary, and select the option to have the repayment paid into your bank account. If your return was submitted recently, allow four to six weeks for processing.
Claiming for Earlier Tax Years
HMRC allows you to claim overpaid tax going back four complete tax years. As of the current tax year (2026 to 2027), this means you can potentially claim back to the 2022 to 2023 tax year. Claims for years older than that are outside the time limit and will not normally be accepted.
For older claims, you will usually need to write to HMRC with a calculation showing what you paid and what you believe you should have paid. This takes longer to process than an online claim and may require additional supporting evidence such as P60s or payslips.
Why Does Overpaying Tax Happen in the First Place?
Understanding the root cause of an overpayment is important — particularly for business owners and self-employed people who want to avoid it in future. Here are the most common reasons:
Wrong Tax Code
If your employer applies the wrong PAYE tax code — for example, a lower allowance code because HMRC has not updated your record — you will pay more tax than you should each month. This is one of the most frequent causes of overpayment, and it is why checking your payslip tax code regularly matters.
Starting or Leaving a Job Mid-Year
The UK tax year runs from 6 April to 5 April. If you leave a job in, say, August, you have only used five months of your annual Personal Allowance. The remaining seven months of allowance never gets used in that job. HMRC’s end-of-year reconciliation should catch this and issue a P800, but it does not always happen quickly.
Emergency Tax Codes
Starting a new job without a P45 often results in an emergency tax code such as 1257L M1 or BR. These codes do not take into account your year-to-date earnings, which means you can end up paying too much in the early months of a new role.
Unclaimed Expenses and Reliefs
Self-employed people who do not claim all allowable expenses — or employees who do not claim work-related expenses they are entitled to — end up paying tax on income that should have been reduced. This is not automatic: you have to actively claim it through a tax return or an expenses claim to get the tax back.
If you are self-employed and have not reviewed your expense claims for the last few years, there may be legitimate deductions you have missed. An accountant review of your last two or three returns can sometimes uncover a meaningful refund — particularly for home-working costs, vehicle use, and professional subscriptions.
How Income Tax Rates Affect the Size of Your Refund
The amount you get back when HMRC refunds overpaid tax depends on which rate you were taxed at. The current Income Tax rates for England, Northern Ireland, and Wales for the 2026 to 2027 tax year are:
| Band | Taxable Income (2026–27) | Tax Rate |
|---|---|---|
| Personal Allowance | Up to £12,570 | 0% |
| Basic Rate | £12,571 to £50,270 | 20% |
| Higher Rate | £50,271 to £125,140 | 40% |
| Additional Rate | Over £125,140 | 45% |
Source: GOV.UK — Income Tax rates and Personal Allowances (tax year 6 April 2026 to 5 April 2027)
This means that if you were incorrectly taxed on £2,000 of income that should have been covered by your Personal Allowance, you would be owed £400 back at the basic rate. If that same income was incorrectly taxed at the higher rate, the refund would be £800. The tax rate that applied to the overpaid income is what determines the refund amount.
The standard Personal Allowance remains at £12,570 for the 2026 to 2027 tax year. If your income falls below this threshold but you had tax deducted — which can happen with emergency codes or incorrect payroll — you are entitled to a full refund of all tax taken.
FAQs About HMRC Tax Refurd Checking Online
How long does it take HMRC to process a tax refund?
Online claims following a P800 typically arrive in your bank account within five working days. Refunds processed through Self Assessment take up to four weeks in most cases. Claims that require manual review by HMRC — such as older years or complex cases — can take up to eight to twelve weeks. If your refund has not arrived within the expected window, contact HMRC to chase it up.
Will HMRC automatically send me a refund without me doing anything?
HMRC may issue a P800 letter and, if you do nothing, send a cheque. But this is not guaranteed for every overpayment — particularly for self-employed people. The safest approach is to check your Personal Tax Account each year and actively claim any refund showing as due rather than waiting for a letter that may or may not arrive.
Can I claim a refund if I have not filed a Self Assessment return?
If you are self-employed and required to file a return, you need to do so before you can claim a refund on self-employment income. If you are an employee who has overpaid through PAYE, you do not necessarily need to file a return — HMRC can process the refund through your Personal Tax Account or by post. However, if your overpayment relates to expenses or reliefs that need to be formally claimed, a return or a specific claim form will be required.
Is there a minimum refund amount HMRC will pay out?
HMRC does not publish a formal minimum threshold for refunds. However, very small amounts — typically under £10 — may be handled differently and might be applied as a credit to your next tax year rather than being paid out directly. If you are owed a meaningful sum, HMRC will process it as a payment.
What if I think HMRC’s P800 calculation is wrong?
Do not claim the refund if you believe the amount is incorrect. Contact HMRC first on 0300 200 3300 and explain why you think the calculation is wrong. Have your P60, payslips, and any relevant correspondence to hand. HMRC will review and reissue a corrected P800 if needed. Claiming an incorrect amount and then having to repay it later creates unnecessary complications.
Final Thoughts
An HMRC tax refund is simply your own money coming back to you. The system collects tax as you go — through PAYE or payments on account — and it does not always get the amount exactly right. At the end of each tax year, HMRC reconciles what was collected against what was actually owed. When those two figures do not match, a refund is due.
The key actions are straightforward: check your Personal Tax Account at least once a year, read any P800 letters carefully when they arrive, and do not leave old claims sitting unclaimed. The four-year time limit on refund claims means money can become inaccessible if you leave it too long.
If you are self-employed, a sole trader, or a limited company director and you are not confident that your tax returns have captured all the reliefs and expenses you are entitled to, speaking to an accountant sooner rather than later is worth it. The team at Micro Entity Accounts works with small business owners and the self-employed across the UK and can review your position quickly and clearly.
Disclaimer: The content on MicroEntityAccounts is for informational purposes only and do not constitute tax or financial advice. We recommend consulting a certified tax professional or the HM Revenue and Customs Dept (HMRC) for accurate guidance. MicroEntityAccounts is not responsible for any decisions made based on the information provided.
