Marriage Allowance 2025/26: £1,260 of Free Tax Relief That 4 Million Couples Still Ignore

Marriage Allowance lets the lower earner in a marriage or civil partnership transfer 10% of their Personal Allowance — £1,260 — to the higher earner. The higher earner receives a 20% tax credit on that £1,260, cutting their tax bill by up to £252.

The mechanics are simple. Every UK taxpayer gets a £12,570 Personal Allowance for 2025/26 — income below that threshold is tax-free. If one partner earns below £12,570 (or nothing at all), part of their allowance goes unused. Marriage Allowance redirects £1,260 of that wasted allowance to the partner who actually pays tax.

After the transfer, the lower earner's Personal Allowance drops to £11,310. If they earn between £11,310 and £12,570, they'll pay some tax on the difference — but the couple still comes out ahead. GOV.UK's own example: a non-taxpayer earning £11,500 and a partner on £20,000 save £214 as a couple after the shift.

One detail people miss: the higher earner doesn't get a bigger Personal Allowance. HMRC applies it as a tax credit — a direct reduction off their bill. That's why the saving is always 20% of £1,260 = £252, regardless of how much the higher earner actually earns (provided they're a basic-rate taxpayer).

Three conditions, all of which must apply:

• Married or in a civil partnership. Cohabiting couples cannot claim, no matter how long they've lived together. This catches people out more than any other rule.
• The lower earner's income is below £12,570. This includes zero earners, part-time workers, carers, and retirees with modest pension income.
• The higher earner pays basic-rate tax. In England, Wales and Northern Ireland, that means income between £12,571 and £50,270. In Scotland, the partner must pay at the starter (19%), basic (20%) or intermediate (21%) rate — income up to £43,662 for 2025/26.

Higher-rate (40%) and additional-rate (45%) taxpayers cannot receive Marriage Allowance. But couples where one partner was born before 6 April 1935 should look at Married Couple's Allowance instead — it reduces tax by between £436 and £1,127 per year in 2025/26. The two are mutually exclusive; you can't claim both.

Common situations people miss:

• Stay-at-home parents with zero income. Their entire £12,570 allowance is wasted without Marriage Allowance.
• Retirees whose state pension (£11,502.40 full rate for 2025/26) is below the Personal Allowance. They qualify.
• Couples living abroad — you're eligible as long as you receive a UK Personal Allowance.
• Self-employed partners earning below £12,570 after deducting business expenses.

The headline saving of £252/year understates the real value for first-time claimants. HMRC lets you backdate to 2021/22 — four previous years plus the current one. Because the Personal Allowance has been frozen at £12,570 since 2021/22, the transferable amount has stayed at £1,260 every year:

A couple claiming today for all five years receives up to £1,260. But there's a hard cutoff: once the 2025/26 tax year ends on 5 April, the 2021/22 year falls outside the four-year backdating window. That year's £252 saving disappears permanently.

For couples already receiving Marriage Allowance, there's nothing to do — it renews automatically. But if you've been eligible since 2021/22 and haven't claimed, every day past 5 April costs you £252 of backdated relief you can never recover.

Backdated amounts are paid as a lump sum into the higher earner's bank account. The current year's allowance is applied through PAYE — the higher earner's tax code is adjusted (suffix 'M' for the recipient, 'N' for the transferor) so they pay less tax each month.

If you're also trying to use up other end-of-year allowances, our tax planning hub covers the full list — from ISA contributions to pension carry-forward and CGT allowances.

The lower earner must apply. Not the higher earner. This trips people up.

Online (fastest): Go to gov.uk/marriage-allowance. You'll need both partners' National Insurance numbers and Government Gateway login credentials. The process takes about 15 minutes.

By phone: Call the Income Tax helpline on 0300 200 3300 (Monday–Friday, 8am–6pm). Useful if you receive dividend income, savings interest above the Personal Savings Allowance, or taxable benefits in kind.

Via Self Assessment: If the lower earner files a tax return, fill out the Marriage Allowance section. If both partners file, the transferor should submit at least 3 days before the recipient, per HMRC guidance.

After approval, HMRC adjusts the higher earner's tax code within a few weeks. Any backdated refund typically arrives in 4–6 weeks.

Warning about paid claims companies. Dozens of websites charge 30–40% of your refund to submit Marriage Allowance claims on your behalf. On a £1,260 backdated claim, that's £378–£504 — for a form that takes 15 minutes and is completely free on GOV.UK. HMRC has repeatedly warned against using these services. Don't pay someone to fill in a form you can do yourself.

Marriage Allowance works the same way in Scotland, but the income threshold for the higher earner is lower. Scottish taxpayers pay income tax at different rates set by the Scottish Parliament:

In Scotland for 2025/26, the higher earner must pay tax at the starter rate (19%, up to £2,827 above the Personal Allowance), basic rate (20%, £2,828–£14,921) or intermediate rate (21%, £14,922–£31,092). Once their income exceeds £43,662, they move into the higher rate at 42% and Marriage Allowance no longer applies.

The practical effect: a Scottish couple where the higher earner is on £48,000 doesn't qualify, while an identical English couple does. If the higher earner is close to the £43,662 boundary, check whether pension contributions or Gift Aid could bring their taxable income below the threshold — both reduce taxable income for this purpose.

Marriage Allowance renews automatically each year. Cancel it if:

• The lower earner's income rises above £12,570. The transferred allowance will generate a tax bill that exceeds the saving.
• The higher earner becomes a higher-rate taxpayer. Above £50,270 (£43,662 in Scotland), the allowance stops applying.
• You separate or divorce. Notify HMRC promptly — the allowance continues until cancelled. Divorce automatically cancels it from the end of the tax year.
• Bereavement. If your partner has died since 5 April 2021, you can still claim backdated Marriage Allowance for years you were eligible. Call the Income Tax helpline.

Three mistakes I see repeatedly:

Assuming both partners must work. Marriage Allowance is specifically designed for couples where one partner earns little or nothing. Stay-at-home parents, carers, and early retirees are the core audience.

Confusing it with Married Couple's Allowance. They're separate reliefs and you cannot claim both. Married Couple's Allowance requires at least one partner born before 6 April 1935 — but it's worth more (up to £1,127/year vs £252).

Thinking it affects benefits. Marriage Allowance does not affect Universal Credit, Child Benefit, or any means-tested benefit. It's purely an Income Tax adjustment — no other part of the system sees it.

This article is for informational purposes only and does not constitute financial advice. You should seek independent financial advice before making any investment decisions. Tax rules, thresholds and allowances are subject to change — verify current rates at GOV.UK.