Tax Refund Calculator
Estimate your potential HMRC tax rebate or amount owed based on your annual income, tax deducted, and personal allowance for the 2024/2025 tax year.
Calculate Your Potential Refund
Enter your annual income and the total tax already deducted to instantly see if HMRC owes you money, or if you have an underpayment.
Rebate Estimator
Get a clear breakdown of your tax liability versus what you have already paid.
How it Works
Understanding your tax calculation
Enter Income
Input your total annual salary, plus any taxable benefits or other sources of income.
Add Tax Paid
Enter the total amount of Income Tax already deducted from your pay (found on your P60 or payslips).
Allowance Check
We apply your Personal Allowance (automatically tapering if your income exceeds £100,000).
Instant Result
We calculate your exact tax liability across the 20%, 40%, and 45% bands and compare it to what you’ve paid.
2024/2025 UK Income Tax Bands
A general overview of the current Income Tax rates and thresholds for England, Wales, and Northern Ireland.
| Tax Band | Taxable Income Range | Tax Rate | Notes |
|---|---|---|---|
| Personal Allowance | Up to £12,570 | 0% | Tapers to zero for income over £100,000. |
| Basic Rate | £12,571 to £50,270 | 20% | Applies to the first £37,700 of taxable income. |
| Higher Rate | £50,271 to £125,140 | 40% | Applies to taxable income between £37,701 and £125,140. |
| Additional Rate | Over £125,140 | 45% | Applies to all taxable income above £125,140. |
Tax Refund FAQ
Answers to the most frequently asked questions about HMRC tax refunds, P800 calculations, and claiming overpaid tax.
You may be due a tax refund if you have overpaid tax through the PAYE system. Common reasons include being on an emergency tax code, having multiple jobs, stopping work mid-year, or having taxable benefits that were not correctly accounted for by your employer.
If you are due a refund, HMRC will usually send you a P800 or Simple Assessment letter after the end of the tax year. You can claim online through your Personal Tax Account. If you do not claim within 4 years, you may lose the right to that refund.
A P800 is a tax calculation sent by HMRC after the end of the tax year (usually between June and November). It compares the tax you actually paid with the tax you should have paid, showing whether you have overpaid (and are due a refund) or underpaid.
Yes. Emergency tax codes (like 1257L W1, M1, or X) do not apply your full annual Personal Allowance, often resulting in overpayment. Once your correct tax code is applied, any overpaid tax will usually be refunded automatically through your payroll or via a P800.