Updated: February 2026 • Based on UK Law
A couple lives together for 14 years. They raise two children. She gives up her career. He owns the house — his name is on the deeds, his deposit paid for it. When the relationship breaks down, she discovers she has no legal right to the home she’s lived in for over a decade. No claim to a single penny of equity. Because they never married.
In England and Wales, “common law marriage” does not exist. A partner of 20 years has no more automatic rights to their partner’s property than a stranger. Without a cohabitation agreement, everything you’ve built together is unprotected — and the only route to claim anything is a TOLATA court application costing £10,000–£50,000+ in legal fees.
This guide covers cohabitation agreement requirements, legal status, property rights and enforceability. Free cohabitation checklist included.
What Is a Cohabitation Agreement?
A cohabitation agreement is a legal contract between unmarried couples living together that sets out ownership of property, finances and assets. Unlike married couples, cohabiting partners have no automatic legal rights to each other’s property under UK law — making this agreement essential protection.
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What Is a Cohabitation Agreement in the UK?
A cohabitation agreement (also called a “living together agreement”) is a written contract between two people who live together but aren’t married or in a civil partnership.
It records who owns the property (and in what shares), how mortgage payments and bills are divided, what happens to jointly purchased items if you separate, how bank accounts and savings are treated, and what happens if one partner dies.
Unlike a prenuptial agreement (which anticipates marriage), a cohabitation agreement governs your relationship as it currently exists. It can be updated as circumstances change — children, property purchases, career changes.
Why Do You Actually Need One?
Because UK law does not recognise “common law marriage.” It doesn’t matter if you’ve been together 6 months or 30 years — cohabiting couples have almost no automatic rights.
If you separate without an agreement, disputes about property and assets must be resolved through TOLATA claims in court. These can cost £10,000–£50,000+ in legal fees, take months or years, and the outcome is far from certain.
A cohabitation agreement prevents all of that by recording intentions in writing while the relationship is strong and you can negotiate fairly.
What Should a Cohabitation Agreement Cover?
| Element | What It Covers | Why It Matters |
|---|---|---|
| Property ownership | Who owns the home, in what shares, how this changes over time | Prevents disputes over the most valuable asset |
| Financial contributions | How mortgage, rent, bills and expenses are divided | Creates clear expectations and records contributions |
| Joint purchases | Furniture, vehicles, expensive items bought together | Determines ownership if relationship ends |
| Bank accounts | Joint accounts, individual savings, how these are treated | Protects individual assets and clarifies joint funds |
| Debts | Who is responsible for which debts | Prevents one partner being liable for other’s debts |
| Separation provisions | What happens to property and assets if you split | Avoids disputes and legal costs at a difficult time |
| Death provisions | What happens if one partner dies | Cohabiting partners don’t inherit automatically |
| Children arrangements | Parental responsibility, maintenance, living arrangements | Provides framework for child-related decisions |
Key Takeaway: A cohabitation agreement protects unmarried couples who have no automatic legal rights under UK law. It records property ownership, financial arrangements, and what happens if you separate or one partner dies.
Is a Cohabitation Agreement Legally Binding in the UK?
Quick Answer: Yes — cohabitation agreements are legally binding contracts in England and Wales, provided they meet standard contract law requirements.
This is actually stronger protection than a prenuptial agreement, which courts can override. A properly drafted cohabitation agreement is treated as an enforceable contract.
What Makes It Enforceable?
For a cohabitation agreement to hold up in court, it must be:
- Entered voluntarily — no pressure, threats or ultimatums
- Made with full financial disclosure — both parties lay their finances bare
- Fair and reasonable — not grossly one-sided
- Signed as a deed (recommended) — witnessed signatures
- Written — not verbal
Ideally, both parties should receive independent legal advice. Courts will uphold a properly drafted agreement unless there’s evidence of fraud, duress or significant unfairness.
Does This Apply Across the UK?
England and Wales: Enforceable as contracts. The landmark case Sutton v Mishcon de Reya (2003) confirmed cohabitation agreements are valid contracts.
Scotland: Also enforceable — and the Family Law (Scotland) Act 2006 provides some automatic rights for cohabitants that don’t exist in England and Wales.
Northern Ireland: Enforceable under contract law, similar to England and Wales.
Key Takeaway: Cohabitation agreements are legally binding contracts when properly drafted. Both parties must enter voluntarily, make full financial disclosure, and ideally receive independent legal advice.
How Much Does a Cohabitation Agreement Cost in the UK?
Quick Answer: Solicitor-drafted agreements cost £500–£2,000+ per person. Templates cost from £10. Solicitor review of a DIY agreement costs £200–£400.
What You’ll Actually Pay
Straightforward agreement where both parties use the same solicitor — expect £1,000–£1,500 total.
Separate solicitors for each party (recommended for enforceability) — £2,000–£4,000 combined.
Complex situations with multiple properties, business interests or children from previous relationships — £3,000–£5,000+.
Can You Write Your Own?
Yes. There’s no legal requirement to use a solicitor.
A DIY agreement must still meet contract law requirements to be enforceable. Using a professionally drafted template ensures all necessary clauses are included and the document follows correct legal formatting.
The smart approach: use a template as your starting point, then pay a solicitor £200–£400 to review and advise. Professional oversight at a fraction of full drafting costs.
What Information Do You Need to Get Started?
- Personal details — full names, addresses, dates of birth
- Property information — address, who owns it, current value, mortgage details, how deposit was funded
- Financial disclosure — income, savings, investments, pensions, debts
- Living arrangements — how mortgage/rent is paid, how bills are divided
- Assets — vehicles, valuable items, business interests
- Children — from current or previous relationships, maintenance arrangements
- Future intentions — plans for property purchase, marriage, having children
What Are the Requirements for Cohabitation?
There are no legal requirements to cohabit in the UK — any two adults can live together without formality.
For a cohabitation agreement to be effective, you should be living together (or intending to), be in an intimate relationship, both be over 18, and both have mental capacity to enter a contract.
The agreement can be signed before you move in together, at any point during cohabitation, or when circumstances change. There’s no “minimum time” requirement. The ideal time is when you first move in together.
Key Takeaway: Solicitor costs £500–£2,000+ per person. You can write your own using a template (from £10) — just ensure full financial disclosure and consider solicitor review for peace of mind.
Is My Partner Entitled to Half My House in the UK?
Quick Answer: No. Your partner has no automatic right to any share of your house simply because you live together.
If your name is the only one on the title deeds, you are the sole legal owner. Full stop.
But They Might Still Be Able to Claim
Your partner may be able to claim a “beneficial interest” (a share of the equity) if they can prove:
- Direct financial contributions to the purchase — deposit payments, mortgage payments
- An express agreement that they would have a share
- An implied agreement based on conduct — contributing to the mortgage on the understanding they’d gain a share
These claims are made under the Trusts of Land and Appointment of Trustees Act 1996 (TOLATA). They’re expensive — £10,000–£50,000+ in legal costs — and the outcome is far from certain.
A cohabitation agreement prevents these disputes entirely by recording upfront whether the non-owning partner gains any interest, and if so, how much.
Are Cohabiting Couples Legally Protected in the UK?
Quick Answer: Barely. The gap between married and cohabiting couples’ legal rights is enormous — and most cohabiting couples don’t realise it until something goes wrong.
What You Don’t Have
- No automatic rights to partner’s property — regardless of how long you’ve lived together
- No inheritance rights if your partner dies without a will
- No rights to partner’s pension
- No spousal maintenance if the relationship ends
- No next-of-kin status for medical decisions
- No tax benefits available to married couples
What You Do Have
- Protection from domestic abuse (same as married)
- Parental rights over biological children
- Ability to make TOLATA claims (expensive and uncertain)
- Rights under any cohabitation agreement you’ve signed
That last point is the one you control. A cohabitation agreement provides the protection that UK law does not automatically give.
How to Prove Someone Is Cohabiting in the UK
Quick Answer: Through documentary evidence (joint tenancy, utility bills, bank statements at the same address) and lifestyle evidence (shared bedroom, joint finances, recognition as a couple by family and friends).
What Counts as Proof?
| Evidence Type | Examples | Strength |
|---|---|---|
| Joint property | Title deeds, mortgage in joint names | Very strong |
| Joint tenancy | Both names on rental agreement | Very strong |
| Utility bills | Gas, electric, water in joint/both names | Strong |
| Bank statements | Same address on statements | Strong |
| Council tax | Both registered, no single person discount | Strong |
| Electoral roll | Both registered at same address | Moderate |
| Witness statements | Family, friends, neighbours confirming | Moderate |
Proving cohabitation is relevant for benefit claims, divorce proceedings (to show a new relationship), inheritance claims and housing benefit assessments.
For cohabitation agreements themselves, you don’t need to “prove” cohabitation — you simply need to be living together when you sign.
Key Takeaway: Your partner has no automatic right to your property just from living together. Cohabiting couples lack the legal protections married couples receive. A cohabitation agreement provides the protection UK law doesn’t.
What Are the Disadvantages of a Cohabitation Agreement?
Quick Answer: Cost, difficult conversations, and the need for periodic updates. But these are vastly outweighed by the protection provided — especially given that cohabiting couples have almost no automatic rights.
The Honest Drawbacks
- Cost: Solicitor-drafted agreements cost £500–£2,000+ per person — though templates bring this down to from £10
- Uncomfortable conversations: Discussing “what happens if we split” can feel unromantic. But these conversations are important regardless of whether you sign anything
- Not 100% guaranteed: Courts can set aside agreements in exceptional circumstances — fraud, duress, gross unfairness. But properly drafted agreements are almost always upheld
- Needs updating: Circumstances change. Children, property purchases, inheritances — the agreement should be reviewed periodically
- Doesn’t cover everything: Child custody and residence are decided by courts based on the child’s best interests, regardless of what any agreement says
Many couples who separated never expected to. The agreement provides security just in case — and the cost of not having one is almost always higher than the cost of creating one.
What Are the 4 Types of Cohabitation?
Cohabitation arrangements typically fall into four categories:
- Pre-marital cohabitation — living together before marriage, often as a “trial run.” The agreement typically converts or ends upon marriage
- Alternative to marriage — long-term cohabitation where the couple has chosen not to marry. The relationship functions like marriage but without any legal protections — making a cohabitation agreement essential
- Post-divorce cohabitation — living with a new partner after divorce. Often involves complex finances (maintenance from ex, children from previous relationships) requiring careful agreement terms
- Temporary cohabitation — short-term living together due to circumstances. The agreement might have different terms reflecting the temporary nature
UK law doesn’t distinguish between any of these. All four types lack automatic property rights. All four benefit from a cohabitation agreement.
When Should You Get a Cohabitation Agreement?
Quick Answer: As early as possible. The ideal time is when the relationship is strong and you can negotiate fairly — not when things are going wrong.
The Key Trigger Points
- Before moving in together — set expectations from the start, especially if one partner owns the property
- When buying property together — essential to record ownership shares and separation provisions
- When one partner moves into the other’s home — clarifies whether the incoming partner gains any interest
- When having children — update existing agreement or create a new one covering parental arrangements
- When finances change significantly — inheritance, redundancy, business success
- When you’ve been together a while without one — better late than never, significant assets have likely accumulated
Don’t wait for a crisis. The people who wish they had a cohabitation agreement are always the ones currently arguing without one.
Key Takeaway: The best time to create an agreement is when you first move in together. The second best time is now. Don’t wait until the relationship is under strain.
Frequently Asked Questions: Cohabitation Agreement UK
What is a cohabitation agreement?
A legal contract between unmarried couples living together that records property ownership, financial arrangements, and what happens if the relationship ends. Unlike married couples, cohabiting partners have no automatic legal rights to each other’s property under UK law.
Is a cohabitation agreement legally binding in the UK?
Yes — when properly drafted. Requirements: voluntary agreement, full financial disclosure, fair terms, signed as deed (recommended), ideally with independent legal advice. Courts uphold properly drafted agreements unless there’s fraud, duress or gross unfairness.
How much does a cohabitation agreement cost in the UK?
Solicitor-drafted: £500–£2,000+ per person. Template-based: from £10. Solicitor review of a DIY agreement: £200–£400. Complex situations with multiple properties or business interests cost more.
Can you write your own cohabitation agreement in the UK?
Yes — there’s no legal requirement to use a solicitor. Using a professionally drafted template ensures all necessary clauses are included. Both parties must make full financial disclosure. Consider solicitor review for peace of mind.
Are cohabiting couples legally protected in the UK?
Very limited protection. No automatic rights to partner’s property, no inheritance rights without a will, no spousal maintenance, no pension rights. A cohabitation agreement provides the protection UK law doesn’t automatically give.
Is my partner entitled to half my house in the UK?
No automatic entitlement from living together. Your partner may claim a “beneficial interest” through TOLATA if they can prove financial contributions or an agreement to share ownership. These claims are expensive (£10,000–£50,000+ in legal costs) and uncertain. A cohabitation agreement prevents these disputes.
What are the disadvantages of a cohabitation agreement?
Cost (though templates start from £10), difficult conversations about separation, needs periodic updating, and can’t override court decisions about children. These disadvantages are far outweighed by the protection provided — especially given cohabiting couples’ lack of automatic rights.
What are the 4 types of cohabitation?
Pre-marital (before marriage), alternative to marriage (long-term, chose not to marry), post-divorce (with new partner), and temporary (short-term convenience). All types need agreements — UK law treats them the same with no automatic rights.
What information is needed for a cohabitation agreement?
Personal details (names, addresses, dates of birth), property information (ownership, value, mortgage), financial disclosure (income, savings, debts, pensions), living arrangements (how bills are divided), and children arrangements. Full disclosure is essential for enforceability.
How do you prove someone is cohabiting in the UK?
Documentary evidence: joint tenancy or mortgage, utility bills in joint names, bank statements at the same address, council tax records, electoral roll. Lifestyle evidence: shared bedroom, joint finances, recognition as a couple by family and friends.
If you haven’t already, grab the free Cohabitation Agreement Compliance Checklist — it pairs perfectly with these FAQs and gives you a complete framework for creating an agreement that holds up.
The Truth About “Free” Legal Template Sites (What You’re Really Signing Up For)
Most websites offering a “free legal template” follow the same pattern:
- You click because it’s advertised as free
- You spend 10–15 minutes answering questions
- At the very end, you must create an account or start a “free trial”
- Your card is required upfront
- The subscription auto-renews at £29–£39 per month
This isn’t a free template — it’s a subscription service. Many people only realise after being charged £300–£400 over the year.
Why These “Free” Templates Are a Legal Risk
- Outdated wording: not aligned with current UK law
- Missing mandatory clauses: required for legal validity
- No compliance guidance: leaving users without legal context
- No structured checklist: no way to verify the document works
- Not kept updated: often unchanged when legislation changes
One incorrect clause can weaken or invalidate the entire document.
Hidden Problem: Many “Free Template” Sites Aren’t Even UK-Based
Another major issue is that many free or auto-subscription template sites operate outside the UK and use documents originally drafted for the US legal system. These are then loosely adapted for “international use,” which creates serious problems:
- Incorrect terminology: taken from US contract law
- Missing UK statutory references: essential legal requirements omitted
- Non-applicable clauses: terms that don’t apply under UK legislation
- Legal conflicts: risks breaching UK consumer, employment, or GDPR rules
Why Templates UK Does the Opposite
- Drafted by UK professionals: written by experienced business & legal experts
- UK-law only: no US crossover or generic “international” templates
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Last updated: February 2026
Disclaimer: This guide provides general UK legal information, not legal advice. Laws are current as of February 2026.
