Marriage Allowance Claim UK: Step-by-Step £252/Year Refund

The Marriage Allowance lets one partner transfer 10% of their unused Personal Allowance to the other, reducing the higher earner's tax bill by £252 a year. Roughly 2.4 million eligible UK couples claim it. Roughly 1.7 million eligible couples don't - leaving approximately £400 million on the table every year, according to HMRC's most recent take-up data.

This guide tells you who qualifies, how to claim it directly from HMRC for free in under ten minutes, and how to backdate to capture up to four extra years.

What it is, in plain English

The UK Personal Allowance is £12,570 for 2026/27 - the amount you can earn tax-free. If one partner doesn't use their full allowance (typically because they earn below £12,570 or aren't working), they can transfer £1,260 (10% of the allowance) to the other partner. That transfer reduces the higher earner's tax bill by 20% of £1,260 = £252 a year.

It's not a refund. It's not a benefit. It's the tax system letting couples share an allowance one of them isn't using.

Do you qualify?

You qualify if all of these are true:

1. You're married or in a civil partnership (cohabiting partners don't qualify, regardless of how long).
2. One of you earns LESS than £12,570 (the Personal Allowance).
3. The other earns BETWEEN £12,571 and £50,270 (basic-rate taxpayer in England, Wales, Northern Ireland) or £12,571-£43,662 (basic-rate in Scotland).
4. Neither of you has claimed the Married Couple's Allowance (a different, older relief for couples born before 6 April 1935).

You do not qualify if:

• You're cohabiting but unmarried.
• The lower earner is above the Personal Allowance.
• The higher earner is in the higher-rate band (above £50,270 in England/Wales/NI, or above £43,662 in Scotland).
• Either of you was born before 6 April 1935 and you've claimed Married Couple's Allowance.

Why you might be a candidate

Common situations that match this pattern:

• One spouse working full-time, the other on maternity / parental leave for a partial year.
• One spouse in retirement on a small private pension below £12,570; the other still working.
• One spouse studying or in non-paid caring responsibilities; the other working basic-rate.
• One spouse self-employed with low/seasonal income; the other employed.
• One spouse in a part-time role earning under £12,570; the other in a salaried job.

If you recognise yourselves, you should claim.

How much is it worth?

Scenario	Annual benefit	5-year backdated value
Current year only	£252	-
Current + 1 backdated year	£504	-
Current + all 4 backdated years	£1,260	up to £1,512 total

The backdated maximum applies if you've been eligible every year from 2022/23 to 2026/27 and never claimed. The lower earner can claim retrospectively.

Important caveat for the lower earner

Transferring 10% of your Personal Allowance to your partner reduces YOUR tax-free allowance from £12,570 to £11,310 for the year. If your income is below £11,310 you pay no tax either way and the transfer is cost-free to you. If your income is between £11,310 and £12,570 you'll start paying basic-rate tax on the difference - which still nets a gain to the couple (your partner saves £252; you might pay up to £252 in tax on the difference, but only if you earn very close to £12,570).

For most candidates (where the lower earner is well below £12,570 - e.g. earning £5,000-£10,000 from part-time work) the transfer is pure household upside.

How to claim - the free DIY route

The lower earner makes the claim. The HMRC online process takes around ten minutes.

1. Sign in to the lower earner's HMRC Personal Tax Account at gov.uk/personal-tax-account.
2. Search the dashboard for "Marriage Allowance" or visit gov.uk/marriage-allowance.
3. Enter the higher earner's National Insurance number and your date of marriage / civil partnership.
4. Tick the years you want to claim for (current year + up to four backdated).
5. Submit.

HMRC adjusts both your tax codes:

• The lower earner gets a tax code suffix of N (e.g. 1131N - meaning £11,310 Personal Allowance).
• The higher earner gets a tax code suffix of M (e.g. 1383M - meaning £13,830 Personal Allowance).

Backdated refunds are paid by cheque or direct payment within around six weeks. The current-year saving comes through as lower PAYE tax in the higher earner's pay packet.

What about refund firms?

You'll see ads from firms offering to "claim your Marriage Allowance" for a fee. They take a cut (typically 20-35%) of your refund. They do exactly the same thing the HMRC online form does - fill in the same fields, submit the same data.

For an annual £252 (or backdated max £1,512), the refund-firm fee is £50-£530. The form takes ten minutes. The honest answer: do it yourself.

The exception: if your situation is genuinely complex (one of you is non-resident, one of you has been bankrupt, or there's a years-old marriage-and-separation reconciliation), an accountant can be worth the fee. For ordinary married couples, the DIY route is overwhelmingly the right call.

Once claimed, does it auto-renew?

Yes. Once you've claimed Marriage Allowance, HMRC continues it for you each year automatically. You only need to act if your circumstances change (separation, divorce, the lower earner's income rises above the Personal Allowance, the higher earner moves into the higher-rate band). You can cancel at any time via your Personal Tax Account.

Frequently confused with

• Married Couple's Allowance - only applies if at least one of you was born before 6 April 1935. Worth more, but a different scheme.
• Marriage Tax Allowance - informal name for the same thing. No separate scheme.
• Tax-Free Childcare - totally separate; doesn't affect Marriage Allowance.

Disclaimer

PayslipIQ provides automated educational guidance based on the figures you supply. It is not regulated tax advice. The Marriage Allowance interacts with Self Assessment in some cases (e.g. one partner is self-employed); for unusual situations, contact HMRC on 0300 200 3300 or use a CTA-qualified tax adviser.