Last updated: 1 May 2026
Are you and your spouse missing out on up to £1,258 from HMRC?
If one of you earns under £12,570 and the other earns under £50,270, you could be owed a Marriage Allowance refund — and you can backdate it up to four years. Use the calculator below to check in seconds. No personal details required, no signup, nothing leaves your browser.
Marriage Allowance Calculator
Find out in 30 seconds if HMRC owes you up to £1,258. All calculations run in your browser — nothing is sent or saved.
Salary, pension, self-employment — total taxable income.
This is an estimate based on standard HMRC rules for the 2026/27 tax year and prior years. Your actual entitlement may differ if you have other allowances, dividend income, or unusual circumstances. Always check with HMRC before relying on these figures. We are not a regulated tax adviser.
✓ Free to use · ✓ No sign-up · ✓ No personal data stored · ✓ Updated for 2026/27 tax year
Ready to claim?
Apply directly to the official UK government source — no fees, no middlemen.
Apply on GOV.UK →Frequently asked questions
How much is Marriage Allowance worth?
For 2026/27, Marriage Allowance is worth up to £252 per year. You can also backdate your claim by up to four tax years for a one-off lump sum of around £1,260.
Who can claim Marriage Allowance?
You qualify if you are married or in a civil partnership, one partner earns under the £12,570 personal allowance, and the other is a basic-rate taxpayer (earning between £12,571 and £50,270).
How long does Marriage Allowance take to come through?
HMRC usually processes Marriage Allowance claims within 6 to 8 weeks. Backdated refunds are paid by cheque or bank transfer.