UK Marriage Allowance: How to Claim GBP 252

Marriage Allowance is one of the most overlooked tax reliefs in the UK system. Eligible couples can save up to GBP 252 a year, plus a one-time lump-sum backdating refund of up to four prior years, by completing a short online claim. HMRC estimates around 2 million eligible couples have not claimed.

This guide sets out who qualifies, how the maths works, the interaction with other allowances, and the practical steps to claim. The relief sits in sections 55B to 55E of the Income Tax Act 2007 and is administered through the Personal Tax Account at HMRC.

Who qualifies for Marriage Allowance

Three conditions must all be met. First, the couple must be married or in a civil partnership recognised in UK law. Cohabiting couples and partners not in a formal legal arrangement do not qualify, regardless of how long they have lived together.

Second, the transferring partner must have income below the Personal Allowance, currently GBP 12,570. This includes earnings, self-employed profits, pensions, and taxable savings interest. A stay-at-home parent, part-time worker, low-income pensioner, or student often meets the test.

Third, the receiving partner must be a UK basic-rate taxpayer (or in Scotland a starter, basic, or intermediate-rate taxpayer). Where the receiving partner is a higher or additional-rate taxpayer the transfer is not available; HMRC will reject or reverse the application.

Edge case: both partners must have been born after 5 April 1935. Where at least one spouse was born before that date, the older Married Couple's Allowance applies instead, which gives different relief at a different rate.

How the maths and the GBP 252 saving works

The transferring partner gives up GBP 1,260 of their Personal Allowance, reducing their own allowance to GBP 11,310. The receiving partner receives an additional GBP 1,260 allowance, increasing theirs to GBP 13,830. Where the transferring partner has no taxable income at all, the GBP 1,260 was not being used and the transfer creates a pure GBP 252 saving (20% of GBP 1,260) for the receiving spouse.

Worked example one: spouse A earns GBP 8,000, spouse B earns GBP 28,000. Spouse A's tax liability before transfer was zero. Spouse B paid 20% on GBP 15,430 (GBP 28,000 less GBP 12,570), an income tax bill of GBP 3,086. After transfer, spouse A's allowance is GBP 11,310 and remains unused. Spouse B's allowance is GBP 13,830 and the tax bill drops to 20% on GBP 14,170, GBP 2,834. The household saves GBP 252.

Worked example two: spouse A earns GBP 12,000, spouse B earns GBP 40,000. After transfer, spouse A has GBP 11,310 of allowance and pays 20% on GBP 690, a tax bill of GBP 138 (previously zero). Spouse B saves the full GBP 252. Net household saving is GBP 114. The transfer remains worthwhile but smaller because the transferring partner now has a partial liability.

Practical action: the calculation matters where the transferring partner's income is close to the Personal Allowance. Above GBP 11,310 of income, the transferring partner becomes a taxpayer; above around GBP 12,570 the transfer becomes net negative for the household.

How to apply through HMRC

Applications are made by the transferring partner through the Personal Tax Account at gov.uk/marriage-allowance. The transferring partner needs a Government Gateway login or a GOV.UK One Login account, and details of both partners including National Insurance numbers, dates of birth, and date of marriage or civil partnership.

HMRC processes the application typically within two weeks. The tax codes of both partners are updated through PAYE: the transferring partner moves to a code with N suffix (1131N), the receiving partner moves to a code with M suffix (1383M). Self-Assessment taxpayers see the adjustment in their year-end calculation.

Backdated claims for up to four prior tax years are processed as one application; HMRC pays a lump-sum refund covering the earlier years where conditions were met in each. For a claim made in 2026/27 backdating could reach 2022/23, potentially delivering up to GBP 1,260 in refunds plus the current year saving.

Edge case: an application can be made by phone to HMRC on 0300 200 3300 where digital access is not possible. Paper form MATCF is also available. The same eligibility tests apply regardless of channel.

Cancelling, changing, and life events

Marriage Allowance continues automatically each year until cancelled. A cancellation might be appropriate where the transferring partner's income rises above the Personal Allowance and they would benefit from keeping the full allowance, or where the receiving partner becomes a higher-rate taxpayer.

Divorce or dissolution of a civil partnership cancels the allowance automatically from the end of the tax year in which the legal change takes effect. Death of either partner stops the transfer at the date of death. Either partner can cancel through the Personal Tax Account or by contacting HMRC.

Where the receiving partner moves into the higher rate band, HMRC will normally cancel the allowance automatically through the next coding notice. A retrospective cancellation may be issued for the year of the change, with a small balancing calculation reflecting the part-year position.

Practical action: a couple whose income positions change should review eligibility annually. A pay rise that pushes the receiving partner over GBP 50,270 (or GBP 43,662 in Scotland for the intermediate rate cap) removes eligibility; an income drop that brings the transferring partner below GBP 12,570 restores it.

Marriage Allowance versus Married Couple's Allowance

Married Couple's Allowance is the legacy relief available only where at least one spouse or civil partner was born before 6 April 1935. It gives a tax reduction of 10% of the allowance (up to GBP 11,080 maximum for 2025/26), so a maximum reduction of GBP 1,108 a year. This is a tax reducer not an additional allowance, and it tapers above income of GBP 37,000 (the minimum reduction is GBP 4,280 for 2025/26).

MCA and Marriage Allowance cannot be claimed in the same year. Where MCA is available it is normally more valuable, particularly at higher income levels where Marriage Allowance cannot be claimed at all.

Couples with both partners born after 5 April 1935 cannot claim MCA. The cohort eligible for MCA is shrinking each year by mortality and is now confined to couples in their late eighties and older.

Edge case: where one partner was born before 6 April 1935 and the other after, the couple is eligible for MCA but may elect to use Marriage Allowance instead if calculation shows it as better; the election is annual.

Common errors and how to avoid them

The most frequent application error is the wrong partner submitting the claim. Marriage Allowance must be initiated by the transferring spouse (the one with income below the Personal Allowance), not the receiving spouse. HMRC's online form is set up from the transferring partner's PTA. A claim submitted from the higher-earner's account is rejected and the couple has to restart from the correct side.

The second common error is missing backdating. A claim made today can be backdated for up to four prior tax years where conditions were met. For couples who have been eligible throughout, a fresh claim in 2026 typically captures GBP 252 for 2022/23, 2023/24, 2024/25, 2025/26 plus the current year - a one-off refund of up to GBP 1,260. The backdating is requested in the same online application; selecting earlier years prompts HMRC to compute the refund.

The third common error is overlooking the receiving partner's actual band, particularly where bonuses, employer share schemes, or rental income push taxable income above GBP 50,270 in some years and not others. HMRC takes a view based on its records and may cancel and re-apply across years; tracking the years where eligibility was actually met avoids the irritation of partial refunds.

Practical action: keeping a simple year-by-year record of each partner's gross income from all sources reduces the risk of stuck claims. Where uncertainty exists about a particular year, HMRC will normally process the certain years and queue the uncertain ones for review rather than rejecting the whole claim.

Frequently asked questions

How much does Marriage Allowance actually save?

Up to GBP 252 a year for the current tax year, plus a backdated refund of up to GBP 1,008 covering four prior years where conditions were met. The exact saving depends on the income of the transferring partner: where their income is below GBP 11,310 the full GBP 252 is gained; between GBP 11,310 and GBP 12,570 the saving reduces because the transferring partner becomes a small taxpayer themselves. Above GBP 12,570 the transfer is normally net negative.

Can I claim if we live together but aren't married?

No. Marriage Allowance is restricted to legally married couples and registered civil partners under sections 55B to 55E Income Tax Act 2007. Cohabiting couples, regardless of length of relationship or shared children, do not qualify. A planned wedding or civil partnership ceremony makes the couple eligible from the date of registration; backdating only reaches back to years in which the legal relationship was already in place.

How long does HMRC take to process the claim?

Typically two weeks for a current-year claim, with tax codes updated through PAYE in the next pay cycle. Backdated claims with refunds for prior years can take six to eight weeks, with payments made by bank transfer to the receiving partner's nominated account. Self-Assessment taxpayers see the adjustment in their year-end calculation rather than through PAYE, which delays the cash benefit until the tax year is reconciled.

What happens if my partner becomes a higher-rate taxpayer?

Eligibility is lost. HMRC normally cancels the allowance automatically through the next coding notice, with a retrospective balancing adjustment for the year of the change. Where the change is known in advance (such as a planned promotion), notifying HMRC through the Personal Tax Account avoids an unexpected tax-code change later. Re-applying becomes possible if the partner's income drops back below the higher-rate threshold in a future year.

Do I need to reapply every year?

No. Once approved the allowance continues automatically each tax year until cancelled or until HMRC removes it due to changed circumstances. The annual transfer adjusts to the current year's allowance figure: the GBP 1,260 transfer for 2026/27 will adjust if the Personal Allowance changes after the 2028 freeze ends. Couples should review eligibility annually to ensure neither income position has changed in a way that disqualifies the claim.