Cohabitation agreements UK 2026 matter more than ever: 3.5 million couples now live together unmarried - the fastest-growing family type - yet the law still gives cohabitants almost none of the protection married couples take for granted. There is no such thing as common-law marriage, however long you live together. A properly drafted cohabitation agreement fills that gap by recording who owns what, who pays what, and what happens if you separate. This guide explains what these agreements cover, whether they are legally binding, realistic costs, and how the government’s June 2026 consultation on cohabitation reform changes the picture - and what it does not change yet.
Understanding Cohabitation Agreements UK 2026
According to the Office for National Statistics, cohabiting couple families grew from 3.1 million in 2014 to 3.5 million in 2024 - 17.7% of all UK families. Most of those couples have no written agreement, and many believe the law protects them anyway.
It does not. When cohabitants separate, there is no divorce-style redistribution of assets, no spousal maintenance, and no automatic share of a home owned in the other partner’s name. Property disputes are fought through strict trust and land law, where contributions and intentions must be proved with evidence, not fairness arguments.
A cohabitation agreement - sometimes called a living together agreement or no-nup - is the practical answer available right now. It is a contract that records ownership shares, financial responsibilities and separation arrangements while the relationship is happy, so that neither partner faces expensive litigation if it ends.
The need is not confined to homeowners. Renting couples benefit from recording tenancy responsibilities and what happens to the deposit; couples where one partner funds the other’s business, career break or study need the arrangement documented; and older couples moving in together after divorce or bereavement often want to ring-fence assets intended for their own children.
Timing follows a simple rule: before the money moves. The best moment to sign is before buying together, before a large deposit contribution, before renovations funded unequally, or before one partner gives up work. Agreements made mid-relationship are perfectly valid - they simply require more careful disclosure of what has already been contributed.
Same-sex couples who have not formed a civil partnership sit in exactly the same position as any other cohabitants, and couples in religious-only marriages that were never civilly registered are treated by the law as cohabitants too - a point that surprises many families and makes a written agreement doubly important where a ceremony created the feeling, but not the fact, of legal marriage.
What Is a Cohabitation Agreement UK 2026?
A cohabitation agreement is a written contract between partners who live together, or plan to, without marrying or forming a civil partnership. It typically declares how the home is owned, how deposits and mortgage payments are treated, how bills and savings are handled, and how property, possessions and debts would be divided on separation.
Agreements pair naturally with a declaration of trust over the property itself and with up-to-date wills - the three documents together cover separation, death and everything in between. For couples who later marry, the agreement can be reviewed and replaced with a prenuptial agreement, since marriage generally revokes the assumptions the original document was built on.
Cohabitation Agreements UK and the Common-Law Marriage Myth
Nearly half of adults still believe cohabiting couples acquire “common-law” rights after some period of living together. No such status exists in England and Wales, and it has not existed since 1753. A partner of thirty years can walk away legally entitled to nothing beyond what they strictly own - which is precisely the risk an agreement removes.
The myth persists partly because other systems do protect cohabitants. Scotland has offered limited statutory remedies since 2006, and Australia and New Zealand treat long-term de facto couples much like spouses. English law does neither - a deliberate legislative gap that the June 2026 consultation may eventually close, but which no court can bridge in the meantime.
The financial consequences of the gap are well documented: research for successive reform campaigns has found cohabiting mothers and long-term non-owning partners bearing the sharpest losses on separation, precisely because their contributions were domestic rather than documented. An agreement converts those understandings into enforceable terms while both partners still agree about them.
The gap bites hardest at three moments: separation, where the non-owning partner may have no claim on the family home; death, where an unmarried partner inherits nothing automatically under intestacy rules; and pension or tax planning, where survivor benefits and exemptions assume marriage. Our guide to unmarried couples’ rights on separation covers the default position in detail.
Are Cohabitation Agreements Legally Binding in the UK?
Yes - properly prepared, a cohabitation agreement is enforceable as a contract. Unlike prenuptial agreements, which bind only through the courts’ discretion, cohabitation agreements deal mainly with property and money between legally independent adults, territory where ordinary contract law applies. Courts have enforced them where the basics of a valid contract are present.
The one historic wrinkle - old cases refusing to enforce agreements between unmarried partners on public policy grounds - is long dead. Modern courts treat cohabitation agreements as ordinary commercial-style contracts about property and money. What actually defeats them in practice is poor drafting: missing signatures, undated documents, terms that contradict the Land Registry title, or wholesale changes of circumstance never reflected in the text.
The conditions matter. Both partners should give full and honest financial disclosure, take independent legal advice, and sign free of pressure - ideally as a deed, which removes any argument about consideration. Terms must be clear and workable: a vague promise to “sort things out fairly” protects nobody.
What a Cohabitation Agreement Cannot Do
Two limits apply. Arrangements for children are never contractually binding - a court can always revisit them because the child’s welfare is paramount, and child maintenance remains governed by the statutory child maintenance scheme. And an agreement that was unconscionable when signed, or signed under duress, can be set aside like any other contract.
Agreements also need maintenance. Major life events - buying a home together, having a child, a large inheritance, one partner stopping work - can make old terms unfair or unclear. A review clause every few years, and after every major event, keeps the document enforceable and relevant.
Evidential value matters even beyond strict enforceability. In a TOLATA dispute the central question is what the couple intended about ownership; a signed agreement is close to conclusive evidence of that intention. Judges deciding trust claims routinely treat a clear written record as decisive, which is why even a partially defective agreement usually beats reconstructing intentions from bank transfers and recollections years later.
For completeness: agreements about living together are different from agreements reached when separating. If you are already splitting up, the equivalent document is a separation agreement recording the division you have negotiated - similar contract principles apply, and it can likewise be enforced if properly executed after disclosure and advice.
How Much Does a Cohabitation Agreement Cost UK 2026?
Costs depend on complexity: a straightforward agreement for a couple with one property and conventional finances sits at the modest end of fixed-fee family work, while agreements involving businesses, trusts, blended families or international assets cost more. Most firms, including specialist family teams, quote fixed fees after an initial discussion rather than open-ended hourly billing.
Where hourly rates apply, the court service publishes solicitors’ guideline hourly rates that give a realistic benchmark of what different levels of solicitor cost in different regions. Two modest legal bills now are dramatically cheaper than contested trust litigation later, where costs routinely reach tens of thousands of pounds.
What Affects the Price of Cohabitation Agreements UK
Four factors drive cost: the number and complexity of assets; whether a declaration of trust and new wills are prepared alongside; whether both partners instruct separate solicitors for independent advice, which strengthens enforceability; and how much negotiation the terms need. Disclosure prepared in advance - mortgage statements, valuations, account summaries - keeps fees down.
Compare that with the alternative. Contested beneficial-interest litigation involves pleadings, disclosure, valuation evidence and often a multi-day trial; costs frequently exceed the equity actually in dispute, and the loser generally pays a large share of the winner’s bill. Against that backdrop, a fixed-fee agreement is among the cheapest insurance available in family law.
Can You Write Your Own Cohabitation Agreement?
You can - contract law does not require a solicitor - but home-drafted agreements fail in predictable ways. Templates miss execution formalities, leave key assets undefined, contradict how the property is actually registered at the Land Registry, or include terms about children that cannot bind anyway. When tested, a defective agreement can be worse than none, because it creates false confidence.
A sensible middle path for simple situations: use a reputable template to agree the outline between yourselves, then have a solicitor turn it into a properly executed deed with disclosure schedules and certificates of independent advice. The charity-run guidance at Advicenow’s Living Together resources is a strong free starting point for understanding the issues before taking advice.
Execution is where self-drafted documents most often unravel. A deed must be signed by both partners with each signature independently witnessed, dated, and expressed as a deed on its face. Both partners should initial the disclosure schedules, and each should keep a signed original. None of this is difficult - but almost every template dispute that reaches solicitors involves at least one formality missed.
What Should Be Included in a Cohabitation Agreement?
The core is property: who owns the home, in what shares, how deposits are protected, what happens to mortgage payments and improvements, and whether one partner can buy the other out on separation. Where shares differ from the legal title, ownership under the Trusts of Land and Appointment of Trustees Act 1996 should be fixed by an accompanying declaration of trust.
Beyond the house, effective agreements cover day-to-day money - joint accounts, bills, savings and debts - plus specific assets and contingencies: cars, contents and valuables; business interests; pets, increasingly dealt with through pet-nup style provisions; life insurance and pension death benefit nominations; and practical separation logistics such as notice periods for moving out.
Debt deserves explicit treatment. Joint borrowing, guarantees and authorised-user credit cards can bind a partner long after separation, and credit files become financially associated once joint products exist. The agreement should state who is responsible for which liabilities and require cooperation in closing or refinancing joint products when the relationship ends.
Finally, think about incapacity as well as separation and death. Lasting powers of attorney let a partner make financial or welfare decisions if the other loses capacity - nothing in cohabitation law provides that automatically - and pension schemes should have up-to-date expression-of-wish forms naming the partner, since scheme trustees are not bound to recognise an unmarried survivor otherwise.
Cohabitation Agreement Checklist for 2026
A complete package usually means: the agreement itself, executed as a deed after disclosure and independent advice; a declaration of trust if property shares need fixing; wills for both partners, since intestacy ignores unmarried partners entirely; and diary-dated review points. Couples with children should also record intended living arrangements - not as binding terms, but as evidence of shared intentions.
Cohabitation Law Reform UK 2026: What Is Changing?
Reform is finally moving. The Law Commission recommended a remedies scheme for cohabitants back in 2007; successive governments shelved it. In June 2026 the government launched a formal consultation on cohabitation reform - the first concrete step towards giving cohabiting couples statutory protection on separation.
What the June 2026 Consultation Proposes for Cohabitation Agreements UK
The consultation explores an opt-out framework: qualifying couples - defined by a minimum period of living together, or by having a child - would gain rights to seek financial remedies on separation and stronger inheritance protection on death, unless they actively opted out. That design would make written agreements more important, not less, since opting out or varying the default scheme would itself need documenting.
The consultation’s design questions are genuinely open: how long a qualifying period should be, whether having a child should qualify a couple immediately, what remedies courts could order, and how freely couples could contract out. Family lawyers broadly welcome reform while warning that an opt-out scheme will surprise couples who never chose legal consequences - exactly the group least likely to have documents.
For existing couples the practical advice is unchanged: put an agreement and wills in place now, and build in a review trigger for when reform legislation actually passes, so the documents can be aligned with - or deliberately opted out of - whatever scheme Parliament eventually enacts.
Frequently Asked Questions
Are cohabitation agreements legally binding in the UK?
Yes, when prepared properly. As contracts about property and money between unmarried partners, they are enforceable where there was full financial disclosure, independent advice, no duress and clear terms - ideally executed as a deed. Terms about children remain subject to the court and the child’s welfare.
Do unmarried couples have the same rights as married couples?
No. There is no common-law marriage in England and Wales. Cohabitants have no right to maintenance for themselves, no automatic share of a partner’s property, and no entitlement under intestacy if their partner dies without a will - however long the relationship lasted.
What happens to our house if we separate without an agreement?
Ownership follows the legal title and trust law. A partner whose name is not on the title must prove a beneficial interest through contributions or a common intention - expensive, uncertain litigation under TOLATA 1996. An agreement and declaration of trust settle the same questions for a fraction of the cost.
What happens if my partner dies without a will?
Intestacy rules give a surviving cohabitant nothing automatically, whatever the length of the relationship. A partner who lived with the deceased for two years may claim reasonable provision under the Inheritance (Provision for Family and Dependants) Act 1975, but that means litigation. Wills remain essential for cohabiting couples.
How much does a cohabitation agreement cost in 2026?
Costs scale with complexity - one property and straightforward finances sits at the affordable end of fixed-fee family work, while business interests, trusts or international assets increase the price. Both partners taking independent advice adds cost but materially strengthens enforceability.
Can we write our own cohabitation agreement?
You can, but home-made agreements commonly fail on execution formalities, vague terms or contradiction with the registered title. Using a template to agree the outline and then having it professionally executed as a deed captures most of the saving with far less risk.
Does having children change what we should include?
Yes. Record intended living arrangements and financial support as statements of intention, alongside statutory child maintenance. Be aware that courts can make property orders for a child’s benefit under Schedule 1 of the Children Act 1989 regardless of what the agreement says.
Will the 2026 cohabitation reforms make agreements unnecessary?
No. The June 2026 consultation proposes an opt-out scheme that is years from becoming law, and even once enacted, couples will need documents to opt out of or tailor the default rules. Agreements made now remain valid and become the baseline evidence of what you both intended.
Cohabitation agreements, declarations of trust and wills drafted as one coherent package.
Disclosure, independent advice and deed execution done properly, so the document holds.
Clear guidance on TOLATA claims and children issues when cohabiting relationships end.
To put a cohabitation agreement in place - or to review one against the 2026 reform proposals - contact the family law team at Connaught Law for a confidential consultation.
