What is Married Couple's Allowance and who is eligible?

Full answer

Married Couple's Allowance (MCA) is frequently confused with the more widely known Marriage Allowance, but they are distinct reliefs with very different eligibility ages and mechanics -- MCA is restricted to older couples and works by directly cutting the tax bill rather than increasing tax-free income. **The key age restriction** Married Couple's Allowance is only available where at least one spouse or civil partner in the marriage/civil partnership was BORN BEFORE 6 April 1935 -- given this birth date restriction, MCA is now relevant only to a shrinking, elderly population of taxpayers, unlike Marriage Allowance (available to any eligible couple, with no age restriction beyond both being adults). **How MCA reduces your tax bill directly** Unlike the standard Personal Allowance or Marriage Allowance (which increase how much income is tax-free before tax is calculated), Married Couple's Allowance works as a DIRECT REDUCTION in the tax bill itself, calculated as a fixed percentage of the MCA amount -- this makes it what is sometimes called a 'tax reducer' rather than an allowance in the more familiar sense. **Income-related tapering** MCA can taper down (though not below a guaranteed minimum amount) if the higher-income spouse's income exceeds a set threshold, reducing by a proportion of the excess income until it reaches the minimum floor -- this is separate from, and works differently to, the Personal Allowance taper that applies to income above £100,000. **Who receives the allowance and how it is claimed** MCA can generally be claimed by whichever spouse has the higher income (for marriages/civil partnerships formed after a certain date, or by the husband by default for older marriages under historic rules, with options to transfer or share the allowance between spouses) -- the specific default and transfer options should be checked against current HMRC guidance, as historic rules created some quirks depending on when the marriage took place. **Worked example** An elderly couple, one of whom was born in 1932 (before the 6 April 1935 cutoff), can claim Married Couple's Allowance. Rather than adding to a tax-free Personal Allowance, the MCA amount is multiplied by a set percentage to calculate a direct reduction in the tax bill itself, applied after the tax on their income has otherwise been calculated -- this is claimed in addition to, not instead of, their normal Personal Allowance. **MCA versus Marriage Allowance -- do not confuse them** A couple cannot claim both Marriage Allowance and Married Couple's Allowance simultaneously for the same tax year -- since Marriage Allowance has no age restriction and is simpler, most younger couples use that instead, while MCA remains relevant only to couples meeting the pre-1935 birth date condition. **Practical tip** If you or your spouse was born before 6 April 1935, check your eligibility for Married Couple's Allowance specifically (not the more commonly advertised Marriage Allowance), since MCA is generally worth considerably more due to how it directly reduces the tax bill, and confirm which spouse should claim it based on your respective income levels.

Try the calculator