Prenuptial Agreement vs Cohabitation Agreement
A prenuptial agreement is a contract entered into before marriage or civil partnership, setting out how assets should be divided if the relationship ends. A cohabitation agreement is a contract between unmarried couples living together, governing financial arrangements during the relationship and on separation.
Overview
English and Welsh law treats married and civil-partnered couples and cohabiting couples very differently on relationship breakdown. Married couples (and civil partners) can apply to the Family Court for financial remedies under the Matrimonial Causes Act 1973 (MCA 1973), and the court has wide discretionary powers to redistribute assets regardless of legal ownership. The court considers all the s.25 MCA 1973 factors including contributions, needs, and standard of living. A prenuptial agreement does not bind the court, but following the Supreme Court decision in Radmacher v Granatino [2010] UKSC 42, a prenup will be given decisive weight if: (a) it was freely entered into; (b) both parties had full financial disclosure and legal advice; and (c) it would not be unfair to hold the parties to it at the time of the divorce. Cohabiting couples have no equivalent statutory financial remedy on separation — there is no 'common law marriage' in England and Wales. On separation, property is divided according to ordinary property and trust law: legal ownership, beneficial interests under the Trusts of Land and Appointment of Trustees Act 1996 (TOLATA), and in some cases proprietary estoppel (Stack v Dowden [2007] UKHL 17). A cohabitation agreement is a contract governed by ordinary contract law and can define financial arrangements during the relationship, ownership of assets, and what happens on separation.
Side-by-Side Comparison
Prenuptial Agreement
Pros
- Provides significant evidence of the parties' intentions — given decisive weight by courts post-Radmacher [2010]
- Can ring-fence pre-marital assets, inheritances, and business interests from distribution on divorce
- Encourages honest discussion of finances before marriage — transparency about debt, assets, and expectations
- Can be combined with a post-nuptial agreement after marriage if circumstances change
Cons
- Not automatically binding in England and Wales — courts retain MCA 1973 s.25 discretion; agreements can be set aside if unfair at time of divorce
- Must satisfy strict Radmacher criteria — must be executed at least 28 days before the wedding; both parties need separate legal advice
- Cannot contract out of a spouse's needs — courts will not enforce provisions that leave one party in financial hardship
Best For
Couples entering marriage or civil partnership where one or both parties have significant pre-marital assets, business interests, expected inheritances, or children from previous relationships, and wish to set clear expectations about financial arrangements on divorce.
Cohabitation Agreement
Pros
- Enforceable as an ordinary contract — provides legal certainty for cohabiting couples who have no statutory financial remedy on separation
- Can define beneficial interests in property — operates as a declaration of trust under TOLATA 1996 s.53(1)(b) if correctly drafted
- Flexible — can address any aspect of the financial relationship, including contributions, debts, and arrangements on separation
- Avoids expensive trust and property litigation (Stack v Dowden-style disputes) on separation
Cons
- Only enforceable as a contract — courts will not apply MCA 1973 discretion to cohabiting couples regardless of any agreement
- Does not provide the same range of remedies as a financial remedy order — cannot create pension sharing, maintenance orders, or global redistribution of all assets
- Must satisfy contractual requirements — cohabitation agreements with no consideration or not intended to be legally binding may be unenforceable
Best For
Unmarried couples who are cohabiting or plan to cohabit, particularly where one or both own property, contribute unequally to costs, or have assets they wish to protect — and who want to avoid relying on TOLATA and trust law disputes if the relationship ends.
Key Differences
Our Recommendation
Unmarried couples planning to cohabit — or already cohabiting — should strongly consider a cohabitation agreement, particularly if they own or plan to buy property together. The absence of any statutory financial remedy on separation means that legal disputes about property ownership and contributions can be protracted and expensive without a written agreement. Couples planning to marry should consider a prenup if either has significant pre-marital wealth, business interests, or children from a previous relationship — but must ensure the Radmacher criteria are met and independent legal advice is taken by both parties.