UK Cohabiting Partner Rights (2026/27): The Common-Law Marriage Myth
UK cohabiting partner rights 2026/27: no "common law marriage" exists, the 7 rights gaps (inheritance, IHT, pension, property, finance on separation, parental, decision-making in incapacity), Cohabitation Agreement template scope, declaration of trust on shared home, 1975 Act inheritance claims, Inheritance (Provision for Family and Dependants) Act 1975.
The common-law marriage myth
Recent surveys show ~46% of UK adults believe "common-law marriage" gives cohabiting partners similar rights to married couples after enough years together. This is wrong. There is NO common-law marriage in UK law - it was abolished in 1753. Cohabiting partners acquire NO automatic spouse-equivalent rights through cohabitation regardless of length, shared children, shared finances, or shared social identity. Only legal commitment (marriage, civil partnership) or explicit private documentation creates partner rights.
UK has approximately 3.6m cohabiting couples (ONS 2024) - the fastest-growing family form. Most have not taken the documentation steps needed to protect each other. The cost of inaction varies from inconvenient (medical decision delays) to catastrophic (losing the home + life savings on partner\'s death or separation).
The 7 rights gaps + how to plug them
| Area | Married | Cohabiting | Fix |
|---|---|---|---|
| Inheritance | Spouse inherits under intestacy automatically; unlimited spouse IHT exemption | Cohabitant gets NOTHING under intestacy; no spouse IHT exemption + £325k Nil-Rate Band (NRB) only | Make a will explicitly naming the partner. Joint property as joint tenants for survivorship. |
| IHT | Unlimited spouse exemption; NRB + Residence Nil-Rate Band (RNRB) transferable to survivor | Standard IHT on transfers above NRB £325k. Worth £130k+ on estates over £325k | Life insurance written in trust; lifetime gifts (7-year Potentially Exempt Transfer (PET) rule); IHT planning specialist for larger estates. |
| Pension | Auto-nomination to spouse often default; spouse pension on death benefits typical | Must actively nominate the partner; some schemes don't allow non-spouse nomination | Check + update nominations on every pension; ask scheme rules on non-spouse benefits. |
| Shared property | Family Law Act 1996 Section 30 matrimonial home rights; financial remedies on divorce equalise property | No automatic rights to a partner's home regardless of contribution. Implied trust claims (TOLATA) possible but hard to prove | Joint tenancy or tenants in common with declaration of trust setting beneficial shares. |
| Separation finances | Court can redistribute property + order maintenance under Matrimonial Causes Act 1973 | No statutory financial remedies. TOLATA + general civil law only. Children claims via Schedule 1 Children Act 1989 | Cohabitation Agreement specifying contributions + what happens on separation. |
| Parental rights | Both parents have parental responsibility automatically | Mother has PR automatically; father has PR only if named on birth certificate (post-Dec 2003) or via PR Agreement / Court Order | Ensure father is named on birth certificate or has formal PR. |
| Medical decisions | Spouse generally accepted as next-of-kin; can make some decisions in incapacity | No automatic next-of-kin status; hospitals may exclude partner from decisions | Health + Welfare LPA naming the partner; clear medical decisions in advance. |
The cohabitant protection checklist
- Make wills explicitly naming each other. Update on major life events (children, property purchase). Cost: ~£100-£300 each with a solicitor; DIY templates exist for simpler estates.
- Joint property structured deliberately - decide joint tenants (survivorship) vs tenants in common (with declaration of trust setting shares). Cost: ~£300-£500 to set up the declaration of trust on a sale or remortgage.
- Cohabitation Agreement - written contract covering contributions, separation, death. Cost: ~£500-£1,500. Strongly recommended for partners who own significant assets jointly or have been together 5+ years.
- Pension nominations - check + update beneficiary forms naming the partner on every pension scheme.
- Life insurance written in trust for the partner - bypasses estate + inheritance tax. Cost: minimal (life insurance + small admin fee for the trust).
- Lasting Power of Attorney - both Property + Finance + Health + Welfare LPAs, naming the partner as attorney. Cost: £82 × 2 = £164 OPG fees per person.
- Parental responsibility - ensure father is on birth certificate (post-Dec 2003) or has formal PR. Critical for medical, educational, housing decisions for children.
- Joint financial planning - emergency fund, joint vs separate accounts, sinking funds covered in our emergency fund guide + joint accounts guide.
Total cost of full protection: typically £1,500-£3,000 per couple. Compared to the cost of NOT having protection (potentially the family home, life savings, child custody complications), it\'s among the highest ROI legal spending most people can do.
Related guides
- UK Intestacy Rules 2026/27 - what happens to cohabitants on partner\'s death without a will.
- UK Lasting Power of Attorney 2026/27 - lifetime decision-making.
- UK Joint vs Separate Accounts Marriage 2026/27 - household finance + spouse vs cohabitant.
- UK Inheritance Tax Rules - no spouse exemption for cohabitants.
- UK Divorce Financial Planning - contrast with cohabitant separation routes.
Frequently asked questions
Does common-law marriage exist in the UK?
No. There is NO concept of "common-law marriage" in UK law. Cohabiting partners - regardless of length of cohabitation, shared finances, children, public statements of commitment - do NOT acquire spouse-equivalent rights through cohabitation alone. The myth persists in popular belief (recent surveys show 46% of UK adults wrongly believe they have common-law marriage rights). The legal reality: marriage / civil partnership grants a bundle of automatic rights; cohabitation grants almost none. Only legal commitment (marriage, civil partnership) or explicit private documentation (will, cohabitation agreement, declaration of trust) creates partner rights.
How long do we need to cohabit before getting any rights?
For most rights - no length gives you spouse rights. Specific 2-year + thresholds apply for limited claims: (a) Inheritance (Provision for Family and Dependants) Act 1975 claim - 2+ years cohabitation required for cohabitant to claim "reasonable financial provision" from a deceased's estate. (b) Bereavement Support Payment - cohabiting partners with dependent children now eligible (since Feb 2023). (c) Most other rights remain absent regardless of length. The "I've lived with my partner for 30 years" defence does not give common-law-marriage rights.
Are children of cohabiting parents disadvantaged?
Children: NO - same rights to financial support from both parents regardless of marital status (Children Act 1989, Child Support Act 1991). Inheritance: same rights as children of married parents (Family Law Reform Act 1987). Parental Responsibility (PR) is different though - the mother has PR automatically; the father needs to be on the birth certificate (post Dec 2003) OR have a PR Agreement OR a Court PR Order. Without PR, the father can't make medical / educational / housing decisions for the child. Critical to sort out at birth.
What's in a Cohabitation Agreement?
A written contract between partners covering: (a) financial contributions to the household, (b) ownership of the home + how to split it on separation or death, (c) how joint debts will be handled, (d) what happens on separation (e.g. who keeps which assets, whether maintenance is payable), (e) children-related plans, (f) what to do if one party becomes ill or dies. Enforceable in court if (i) entered freely, (ii) both parties received independent legal advice (recommended), (iii) full + frank disclosure of finances, (iv) reasonable + not unconscionable. Typical cost to draft: £500-£1,500 with a solicitor; templates available from advicenow.org.uk + similar.
What about the home we live in together?
Property ownership matters enormously. (a) Joint tenants - both own equally; on death of one, survivor automatically becomes sole owner (outside intestacy + will). On sale during life, proceeds split equally. (b) Tenants in common - each owns a defined share (often unequal reflecting contributions); on death, the deceased's share passes per will or intestacy (not automatically to the survivor). On sale, proceeds split per shares. (c) Sole ownership with the partner contributing - contributor has at best an implied trust claim under TOLATA, very fact-specific + hard to prove. Recommendation: tenants in common with a Declaration of Trust setting out the beneficial shares + what happens on death + separation. Costs ~£300-£500 to draft.
What if my partner dies without a will?
Bad outcome. The estate passes per intestacy rules - to surviving spouse/children/parents/siblings/Crown. Cohabiting partner gets NOTHING from the statutory rules. Recourse: (a) Inheritance (Provision for Family and Dependants) Act 1975 claim within 6 months of grant of probate. Cohabitant qualifies if (i) cohabited for 2+ years, OR (ii) maintained by the deceased (financial dependency). Court can order "reasonable financial provision" - varies from minimal to substantial depending on dependence + estate size. (b) If the partner owned the home jointly as joint tenants - survivor inherits the home by survivorship outside intestacy. (c) Joint accounts pass by survivorship. (d) Pension nominations + life insurance in trust still operate if set up.
What about separation - can I claim against my partner?
Limited routes. Unlike divorce, there's no statutory financial remedy framework for cohabitant separation. Available routes: (a) Property claims under TOLATA 1996 - if you contributed to a property the partner owns. Hard to prove + expensive litigation. (b) Schedule 1 Children Act 1989 claims - for children's benefit, you can claim housing / maintenance from the other parent. Money is for the child, not you, but can be substantial. (c) General civil law claims - if there was a contract, debt, or specific representation you relied on. The Law Commission has long recommended cohabitant financial remedy reform; the November 2024 Cohabitation Bill is in progress but uncertain. Until reformed, the Cohabitation Agreement is the strongest protection.
What about the 2024 Cohabitation Rights Bill?
Currently a Private Member's Bill (Baroness Burt). Proposes giving cohabitants who have lived together for 2+ years OR have children together a route to claim financial remedies on separation similar (but not identical) to divorce. Includes opt-out mechanism for cohabitants who want to keep their separate financial autonomy. As of mid-2026 the Bill is in early stages; no government endorsement; outlook uncertain. The Law Commission's 2007 + 2024 recommendations cover similar ground but have not been legislated. Practical: do not rely on the Bill passing; act today via wills + Cohabitation Agreements + property structuring.