Tax Rebate P800 Explained – What It Is and How to Claim
Many people in the UK overpay their tax without even realising it. HMRC has a process to refund overpaid tax through the Tax Rebate P800. If you have received a P800 tax calculation, it means HMRC has reviewed your income and tax records and found that you have paid too much tax. In such cases, you may be entitled to a refund.
ACG has you covered with our Personal Tax Filing services to help you claim back any overpaid tax and eligible expenses. Assistance with Personal Tax Returns.
What is the Tax Rebate P800?
The tax rebate P800 is not a form you fill in yourself. Instead, it is a calculation issued by HMRC when they discover you have paid too much income tax.
You may receive a P800 letter if:
- You had more than one job or pension.
- You changed jobs during the tax year.
- You received benefits in kind.
- You were on the wrong tax code.
- HMRC records did not fully match your actual income or deductions.
If you are due a refund, the P800 tax rebate will show you the amount.
How Do You Receive a Tax Rebate P800?
- Letter from HMRC – HMRC will send you a P800 calculation.
- Check the details – Ensure income, tax codes, and allowances are correct.
- Claim online – If a refund is due, you can claim via your HMRC online account.
- Bank transfer or cheque – Refunds are usually paid directly into your account within 5 working days.
Claim online here: https://www.gov.uk/claim-tax-refund
Example Situations
- Case 1: Two Jobs
David worked two part-time jobs, but both employers used the full personal allowance tax code. HMRC spotted the error and sent a P800 tax rebate for £620. - Case 2: Job Change
Sophie switched employers mid-year. The new employer used a temporary tax code, leading to overpayment. She received a P800 refund of £340. - Case 3: Pension & Work
Alan received both a small pension and part-time earnings, which caused an overpayment of tax. HMRC issued a tax rebate P800 showing a £450 refund.
What If the Tax Rebate P800 is Wrong?
- Always check your P800 carefully.
- If you believe HMRC miscalculated, contact them immediately.
- Incorrect P800s can result in either underpayment or missing out on refunds.
Contact HMRC here: https://www.gov.uk/contact-hmrc
Common Issues with P800
❌ Not everyone receives a P800 – only when HMRC identifies overpayment.
❌ Sometimes refunds are automatically issued without the P800.
❌ You cannot request a P800 yourself; it’s generated by HMRC.
❌ If you owe tax, HMRC may adjust your tax code instead.
FAQs – Tax Rebate P800
Q1: How long does it take to get a P800 refund?
Once claimed online, refunds usually take 3–5 working days.
Q2: Can I get a P800 every year?
No, only if HMRC finds you overpaid tax.
Q3: What if I don’t claim my refund?
If you don’t claim online, HMRC will send a cheque, but it may take longer.
Q4: Do I need to use a tax agent?
Not always, but many people use advisors to check their codes, allowances, and ensure all refunds are claimed.
Q5: Can I backdate claims?
Yes, HMRC can go back up to four tax years for tax refunds.
Why Contact Audit Consulting Group?
At Audit Consulting Group, we specialise in helping clients with:
- Understanding their tax rebate P800.
- Checking calculations for accuracy.
- Claiming refunds quickly and correctly.
- Preventing errors that lead to underpayment notices.
We ensure you get every penny you are entitled to — with no stress, delays, or confusion.
Contact Audit Consulting Group today and let us manage your tax rebate claim with HMRC.
Official HMRC guidance: https://www.gov.uk/tax-overpayments-and-underpayments/if-youre-due-a-refund
