Question 1

Who qualifies for Marriage Allowance in 2025/26?

Accepted Answer

You qualify if you are married or in a civil partnership, AND the lower earner has income below the Personal Allowance (£12,570), AND the higher earner is a basic-rate taxpayer with income between £12,571 and £50,270. If either partner pays higher-rate tax, you do not qualify. Non-taxpayers who receive certain state benefits may also be excluded.

Question 2

How much is the Marriage Allowance saving in 2025/26?

Accepted Answer

The lower earner transfers £1,260 of their unused Personal Allowance to their spouse or civil partner. Because that extra allowance is taxed at 0% instead of 20%, the higher earner saves exactly £252 per year (£1,260 × 20%). The saving is fixed — it does not depend on exact income levels within the eligible range.

Question 3

How do I claim Marriage Allowance?

Accepted Answer

The lower-earning partner applies online at GOV.UK (gov.uk/apply-marriage-allowance). HMRC adjusts both partners' tax codes automatically — the higher earner's code increases by 1,260 (e.g. 1257L becomes 1383L) and the lower earner's code decreases by 1,260. The change usually takes effect within a few weeks and applies from the start of the current tax year.

Question 4

Can I backdate my Marriage Allowance claim?

Accepted Answer

Yes — you can backdate claims by up to 4 complete tax years as well as claiming the current year. The maximum lump-sum refund from backdating is 4 × £252 = £1,008 (prior years) plus £252 for the current year, giving a total of up to £1,260. HMRC will pay the backdated refund by cheque or bank transfer.

Question 5

Does Marriage Allowance apply to civil partnerships?

Accepted Answer

Yes — civil partners have exactly the same eligibility as married couples. The rules and savings are identical. You can apply as soon as your civil partnership is registered with the register office.

Question 6

What happens to Marriage Allowance if we separate or divorce?

Accepted Answer

Marriage Allowance stops at the end of the tax year in which you separate. If you divorce or dissolve a civil partnership, the allowance ends immediately. HMRC will adjust your tax codes accordingly. Any allowance already transferred in that tax year is not clawed back.

Marriage Allowance Calculator 2025/26

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