The Common Law Marriage Myth — UK Edition

46% of UK cohabiting adults believe they have the same legal rights as married couples. They don't — and the gap can cost a family their home. Here's what the law actually says, why the myth persists, and the three documents that close the gap.

The headline fact

Common law marriage does not exist in modern UK law. It has not existed in England or Wales since Lord Hardwicke's Marriage Act of 1753. Scotland abolished its limited equivalent — "marriage by cohabitation with habit and repute" — in the Family Law (Scotland) Act 2006. Northern Ireland never had a common law marriage doctrine in modern times.

If you live with a partner outside of marriage or civil partnership, the law treats you as legally unrelated for almost every purpose that matters when someone dies.

Where the myth comes from

Three threads keep the myth alive:

1. Pre-1753 English law

Before the Marriage Act of 1753, England recognised "irregular marriages" — couples could become legally married by exchanging vows in private, with witnesses, without a church ceremony. The 1753 Act ended that. The phrase "common law marriage" leaked into modern usage from this earlier period, but the underlying law has not existed for 270+ years.

2. US influence

A small number of US states (currently around 7, including Texas, Colorado, and Iowa) still recognise common law marriage. US film and television regularly references it. UK audiences pick up the term and assume it applies in the UK too. It doesn't.

3. Everyday language

People say "my partner" or "my common law wife" because no neutral English word for a long-term unmarried partner exists. The casual usage gets mistaken for a legal category.

Married couples vs cohabiting couples — the rights compared

What happens when an unmarried partner dies without a will

The estate passes under the Administration of Estates Act 1925 to the deceased's blood relatives in strict order: children → parents → siblings → nephews and nieces → grandparents → aunts and uncles → cousins → the Crown. The surviving partner is nowhere on that list.

Real consequences from UK probate courts:

• Surviving partner left renting from the deceased's brother who inherited the house
• 50-year cohabiting partner receiving £0; estate divided between estranged adult children of the deceased's first marriage
• Surviving partner forced to claim under the 1975 Act, with legal costs of £35,000+ to receive what a will would have given for free

The three documents that close the gap

1. A mirror will (most urgent)

Two wills, one for each partner, with matching terms. Each names the other as primary beneficiary. Each names guardians for any children. Each can include specific bequests (a piece of jewellery to a sibling, a sum to a godchild). Mirror wills are the single highest-leverage document for an unmarried UK couple. Twenty minutes online. Reviewed by a qualified estate planner. £99 for the pair at ClearLegacy.

2. A cohabitation agreement

A written agreement, signed by both partners, that defines what happens to property and finances during the relationship and on separation. Not the same as a will (which covers death) — but complementary. Citizens Advice provides a good overview.

3. Up-to-date pension and life insurance nominations

Each pension provider holds a "nomination of beneficiaries" form. Each life insurance policy can be written in trust. Both bypass intestacy entirely — but only if the paperwork is current. Update them after any major life event: house move, child, new job, separation.

Frequently asked questions

Does common law marriage exist in the UK?

No. It does not exist in England, Wales, or Northern Ireland. Scotland's limited equivalent was abolished by the Family Law (Scotland) Act 2006.

How long do you have to live together in the UK to be considered married?

There is no period of cohabitation that creates marriage under UK law. Marriage requires a ceremony recognised under the Marriage Act 1949 (or a civil partnership under the Civil Partnership Act 2004).

What rights do cohabiting couples have in the UK?

Cohabitees have very limited rights. No automatic inheritance, no spousal IHT exemption, no automatic right to remain in the home, no automatic next-of-kin status. They can apply under the Inheritance Act 1975 if dependent for at least two years — but it requires litigation.

Why do so many UK adults believe common law marriage exists?

A mix of pre-1753 legal history, US influence (common law marriage still exists in a few US states), and the everyday phrase "common law husband / wife" being mistaken for a legal status.

How can cohabiting couples protect each other?

Mirror wills first; cohabitation agreement second; pension and life insurance nominations third. All three can be in place within a week.