Marriage Allowance Calculator 2025-26
Find out if you and your spouse or civil partner can save up to £252 per year.
📖 What is Marriage Allowance?
Marriage Allowance lets a lower-earning spouse or civil partner transfer up to £1,260 of their unused personal allowance to their partner, reducing the higher earner's tax bill by up to £252 a year. You can backdate claims up to 4 tax years.
Eligible if: married or civil partners · one earns under £12,570 · the other is a basic-rate taxpayer (income £12,571–£50,270) · not available if either pays higher-rate tax
✓ Eligible — income below £12,570
✓ Eligible — basic-rate taxpayer
You could save
£252
per year — and up to £1,008 by backdating 4 years
How it works
You transfer £1,260 of your unused personal allowance to your partner. Their tax bill reduces by £252 (£1,260 × 20%).
You can backdate claims to the 2021-22 tax year — potentially saving £1,008 total.
Apply on gov.uk →Available to married couples and civil partners. Figures based on 2025-26 tax year.