Why Cohabiting Couples Can't Claim Marriage Allowance (and What to Do Instead)
Marriage Allowance is worth up to £252 a year — but only married couples and civil partners can claim it. Cohabiting couples are excluded entirely, no matter how long they've lived together. Here's why, and what alternatives actually exist.
The Legal Line: Marriage/Civil Partnership vs Cohabitation
Marriage Allowance complete guide| Married/civil partnered | Cohabiting | |
|---|---|---|
| Marriage Allowance eligible | Yes | No |
| Inheritance Tax spousal exemption | Yes — unlimited transfers between spouses IHT-free | No |
| Universal Credit assessed as a couple | Yes | Yes |
| Automatic inheritance rights without a will | Yes (under intestacy rules) | No — cohabiting partners have no automatic inheritance right |
| Pension death benefits (scheme-dependent) | Usually included by default | Often requires an explicit nomination |
What Marriage Allowance Is Worth
| Scenario | Transfer | Tax saving |
|---|---|---|
| One partner earns below Personal Allowance, other is basic rate | £1,260 of Personal Allowance transferred | Up to £252/year |
| Backdated 4 tax years plus current year, all eligible | £1,260 × 5 years transferred | Potentially over £1,200 combined |
This is only available where both partners are married or in a civil partnership — living together, even for decades, with shared finances and children, does not qualify under current legislation.
What Cohabiting Couples Can Still Do
- Use both people's full allowances separately — each partner has their own £20,000 ISA allowance, £12,570 Personal Allowance, £3,000 Capital Gains Tax exemption, and pension annual allowance; structuring savings and investments to use both fully can achieve some of what Marriage Allowance does for a married couple, just through different mechanisms.
- Hold savings/investments in the name of the lower-taxed partner where practical, so interest, dividends and gains are taxed at that partner's (potentially lower) marginal rate.
- Write wills and pension nominations explicitly — since cohabiting partners have no automatic inheritance rights or default pension death benefit entitlement, this is essential protection that married couples get by default.
- Consider a cohabitation agreement to clarify financial arrangements, since cohabiting couples also lack the financial claims on separation that divorcing spouses have.
The Bigger Picture
The gap between cohabiting and married/civil-partnered treatment in UK law extends well beyond Marriage Allowance — inheritance, pensions, and separation rights all differ significantly. If marriage or civil partnership is already being considered, Marriage Allowance is a modest additional benefit; if it isn't, cohabiting couples should focus on the alternative planning steps above (wills, nominations, allowance-splitting) rather than treating the missing tax allowance as the primary financial gap to close.
Frequently asked questions
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