Marriage Allowance can reduce a couple’s tax bill, but only when the income pattern fits. It is designed for married couples or civil partners where one person has unused Personal Allowance and the other is not a higher-rate taxpayer.
Quick answer
GOV.UK says Marriage Allowance lets one spouse or civil partner transfer £1,260 of Personal Allowance to the other, reducing their tax by up to £252 in the tax year. You cannot claim if you are only living together and are not married or in a civil partnership.
Check eligibility: use the UK Marriage Allowance Calculator to estimate whether the transfer is worth it.
Who can usually claim?
- You are married or in a civil partnership.
- The lower earner usually has income below the Personal Allowance.
- The higher earner pays basic-rate Income Tax, or in Scotland pays starter, basic, or intermediate rate.
- Neither person is using Married Couple’s Allowance instead.
When it may not help
It may not help if the lower earner already uses all their Personal Allowance, or if the higher earner pays higher-rate tax. In Scotland, the income band for the receiving partner is lower than the rest of the UK because Scottish rates differ.
Can you backdate it?
GOV.UK currently says claims can be backdated to 6 April 2021 for years where you were eligible. That makes it worth checking previous tax years if your income pattern has been stable.
Bottom line
Marriage Allowance is not huge, but it is a clean win when the couple fits the rules. Use the calculator first, then apply through GOV.UK if the result is positive.
