Marriage Allowance: A £252 Tax Cut Most Couples Miss

01 Who actually qualifies

You qualify when you're married or in a civil partnership, one of you earns below the £12,570 personal allowance, and the other is a basic-rate taxpayer. The lower earner is the one who transfers £1,260 of their unused allowance to the higher earner; living together as an unmarried couple does not count, however long you've been together.

The recipient's income has to sit in the basic-rate band — broadly £12,571 to £50,270 across England, Wales and Northern Ireland, or up to £43,662 in Scotland. Outside that band the relief either doesn't apply or claws back, which is the single most common reason a claim goes wrong.

Source: GOV.UK — Marriage Allowance

02 The saving, and how to claim

The saving is fixed at 20% of the £1,260 transferred — £252 for the current tax year, every year you remain eligible.

Because the transfer is a slice of allowance rather than a slice of income, the figure does not scale with how much either of you earns. A couple where one earns nothing and the other earns £20,000 saves exactly the same £252 as a couple where one earns £10,000 and the other £45,000.

Claim it directly through HMRC at gov.uk. It is free, it takes a few minutes, and you should never pay a reclaim company a percentage of your own rebate to do something you can do yourself in a browser. Those companies are legal, widely advertised, and take a substantial share of a fixed £252.

Once set up it renews automatically each year until circumstances change, and you tell HMRC when they do — a rise in the lower earner's income above the personal allowance, or the higher earner moving into the higher-rate band, both end eligibility.

Backdating is where the real money is. A claim can be backdated up to four tax years, so a couple who have been eligible throughout can receive over £1,000 in a single payment for a form that takes ten minutes. That is by some distance the best return on time available anywhere in the UK tax system, and the reason this allowance goes unclaimed by so many couples is simply that nobody tells them.

03 When not to bother — and the higher-rate trap

Skip it if the recipient is a higher- or additional-rate taxpayer, because the relief is basic-rate only and can leave you marginally worse off. It also rarely helps if the lower earner actually uses most of their own allowance — transferring £1,260 they need themselves can simply move the tax from one of you to the other rather than removing it.

The clean case is the one to act on: a genuine non-taxpayer (a part-time worker, a parent at home, a partially retired spouse) paired with a basic-rate earner. That's free money, and the four-year backdating means it's often worth several hundred pounds the day you set it up.

If the lower earner has a genuinely low income, it is worth checking the other allowances that behave the same way before settling for £252. Voluntary National Insurance contributions can fill gaps in their State Pension record for a few hundred pounds a year and pay back within about three years — a far larger return for the same amount of paperwork, and one that compounds for life rather than resetting annually.