Marriage Allowance · Backdate
Marriage Allowance Backdate — Claim up to 4 Years (£1,008+ Refund)
UK Marriage Allowance lets a lower-earning spouse transfer £1,260 of their unused Personal Allowance to a basic-rate partner, cutting their tax bill by up to £252a year. If you never claimed, HMRC's 4-year rule lets you backdate the claim across the last four tax years — a one-off refund of around £1,008 for couples who were eligible the whole time.
Marriage Allowance backdate claims are free and take about 10 minutes at gov.uk/apply-marriage-allowance. “Marriage tax rebate” companies typically keep 30–48% of your refund for filling in the same form. HMRC will never text, email or WhatsApp you about a refund.
What is Marriage Allowance?
Marriage Allowance (sometimes called the Marriage Tax Allowance) was introduced in 2015. It lets a spouse or civil partner whose taxable income is below the Personal Allowance transfer 10% of their PA — currently £1,260on a £12,570 allowance — to their partner. The recipient pays £252 less in income tax (£1,260× 20% basic rate). It is administered through PAYE tax codes, not a separate payment, but backdated years are paid as a one-off refund.
Who can claim?
You can claim for any year in which all of the following were true:
- Married or in a civil partnership for at least part of the tax year (cohabiting couples do not qualify, however long-term).
- Lower earner's taxable income below the Personal Allowance— £12,570 for all years since 2021/22 (the PA is frozen until April 2028 under the current Finance Acts).
- Higher earner is a basic-rate taxpayer— total taxable income between £12,570and £50,270 in England, Wales and Northern Ireland. In Scotland, the recipient must not be in the higher (42%) or top (45/48%) Scottish bands. Higher-rate and additional-rate taxpayers cannot benefit.
- Both partners UK resident for tax in the year(s) being claimed.
- Both born on or after 6 April 1935.Couples where one partner is older claim the separate (and more generous) Married Couple's Allowance instead.
The 4-year backdate window
The deadline comes from Taxes Management Act 1970, Schedule 1AB— HMRC's overpayment relief rule. You have until 5 April four years after the end of the tax year to lodge a claim. After that date the year is statute-barred and cannot be recovered, even on appeal.
Today (17 May 2026) these four tax years are still claimable:
| Tax year | Lower-earner PA | Backdate deadline | Max saving |
|---|---|---|---|
| 2025/26 | £12,570 | 5 April 2030 | £252 |
| 2024/25 | £12,570 | 5 April 2029 | £252 |
| 2023/24 | £12,570 | 5 April 2028 | £252 |
| 2022/23 | £12,570 | 5 April 2027 | £252 |
| All 4 years | — | — | £1,008 |
Per-year Marriage Allowance benefit is approximately £250 across all four claimable years. Small variations (a pound or two) reflect rounding in HMRC's published transfer amount.
How to claim (4 steps)
- Confirm eligibility year by year.For each tax year, check that the lower earner's taxable income was under £12,570 and the higher earner was a basic-rate taxpayer. P60s from each year are the easiest source. Use our Marriage Allowance calculator to sanity-check the figures.
- Get both partners' National Insurance numbers. The lower earner applies, so they need a Government Gateway user ID (sign up free at gov.uk if you do not have one) plus one identity item: P60, passport, recent payslip, or a child benefit / tax credits reference.
- Apply at gov.uk/apply-marriage-allowance. Tick each year you want to backdate within a single application. You can also apply by phone on 0300 200 3300 or by post using form MATCF if you do not want to use the online service.
- Wait 8–12 weeks for HMRC. Backdated years are paid as a refund (cheque or BACS); the current year is applied as a tax code change. Track progress in your Personal Tax Account.
When you cannot claim (common mistakes)
- One partner pays higher-rate taxfor that year. Even a small bonus that tips the recipient over £50,270 disqualifies that year.
- You were only cohabiting. The relief is strictly for marriages and civil partnerships registered with the state.
- Lower earner's income exceeded the PA.Including taxable savings interest above the £1,000 PSA, dividend income above the dividend allowance, and self-employment profits.
- Year already statute-barred.Once 5 April + 4 years has passed, the year is gone — there is no “reasonable excuse” route for Marriage Allowance backdate.
- You assumed it was automatic.HMRC do not auto-apply Marriage Allowance — you must actively claim, every couple has to.
- You filed Self Assessment but did not tick the box. Going forward you can amend a return within 12 months of the filing deadline; older years go through the dedicated MA form.
Avoid agencies that take 30–48%
A small industry of “marriage tax rebate” agencies advertises on social media and through cold-calls. They typically deduct 30% to 48%of any refund — on a maximum £1,008backdate, that's £ 403 of your own tax money kept by the agency.
HMRC tightened the rules in 2023 (the “refund-company crackdown”): agency assignments are no longer legally binding, and HMRC now pays refunds direct to the taxpayer. But once you have signed a deed of assignment some firms still bill you for their cut.
Always apply direct. The official route is gov.uk/apply-marriage-allowance. It takes about 10 minutes and costs nothing. If you have already signed up with an agent, you can cancel by writing to them directly — HMRC's 2024 guidance confirms you keep 100% of any refund paid after the cancellation.
What happens after you claim
Backdated years are paid as a lump sum. The current year is applied through PAYE codes: the recipient's code gets the M suffix (their allowance rises by £ 1,260); the transferor's gets the N suffix (allowance falls by the same amount). The arrangement then renews automatically each yearuntil one partner cancels it, the couple divorces, or income changes push you out of eligibility — you do not need to re-apply annually.
If your circumstances change later (the transferor moves into higher rate, or the partnership ends), cancel through your Personal Tax Account or by ringing 0300 200 3300. Failing to cancel after a higher-rate year leads to an underpayment that HMRC will collect through next year's tax code.
Frequently asked questions
Can I claim Marriage Allowance if my spouse died?
Yes. The surviving partner (or the deceased's personal representative) can backdate Marriage Allowance for any of the last 4 tax years in which the couple was married or in a civil partnership, the lower earner had income below the PA, and the higher earner was a basic-rate taxpayer. Apply by phone on 0300 200 3300 — the online form is for living couples only.
What if my income changed mid-year?
Eligibility is judged across the whole tax year, not month by month. The lower earner can have some earnings (even a part-year job) and still claim, provided total taxable income for the year stayed below £12,570. If you are unsure, run the numbers in our Marriage Allowance calculator before you apply.
Does it reduce my tax code?
Yes — for the transferring partner. Their tax code changes from L to N (typical: 1257L becomes 1131N). The receiving partner's code changes from L to M (1257L → 1383M), giving them about £252/year more take-home pay. HMRC handles this with your employer automatically.
How long does HMRC take?
Published target is 8–12 weeks for a backdate refund; in practice 6–16 weeks depending on workload. January and April are the slowest months. Track progress in your Personal Tax Account; ring 0300 200 3300 only if 14 weeks have passed with no update.
Can higher-rate taxpayers claim?
No. If either partner paid higher (40%) or additional (45%) rate in a given year, that year is out. In Scotland the cap is the intermediate (21%) band — once the recipient hits the 42% Scottish higher rate, the year is ineligible. Earlier years where both partners were basic-rate can still be claimed.
Does the claim continue automatically?
Yes. Once accepted, Marriage Allowance rolls forward every year through your tax code — no annual re-application. You only need to act if you divorce, separate, or one partner moves into higher rate, in which case cancel through gov.uk or by phone.