Marriage Allowance calculator
If one of you earns less than £12,570 and the other is a basic-rate taxpayer (£12,570 to £50,270), you can transfer £1,260 of personal allowance and save up to £252 a year. Claim is backdatable four tax years.
Your details
Must be below £12,570 to transfer Marriage Allowance
Must be a basic-rate taxpayer (£12,570 to £50,270)
HMRC lets you backdate up to 4 tax years
Your refund
Annual saving£252
Years claimed5
Total claim£1,260
You qualify
Apply on gov.uk or via Self Assessment. We can include this in your filing.
Backdating
You can backdate to 2020-21 (closes 5 April 2025). 2021-22 closes 5 April 2026, and so on.
Avoid scams
"Marriage Allowance refund agents" charge 25-50%. The gov.uk application is free and takes 5 minutes.
We file the lot for you
Personal plan files SA100 with Marriage Allowance, pension relief, and any other reliefs.
See Personal plan