Prenuptial Agreements (Prenups) in the UK: Are They Binding?

A prenuptial agreement (prenup) is a contract signed before marriage, setting out how money and property would be divided if the marriage later ends. In England and Wales it is not automatically binding, but courts increasingly give it decisive weight. Scotland treats prenups differently again.

What Is a Prenuptial Agreement?

A prenuptial agreement, often shortened to prenup, is a contract two people sign before they marry, recording how they intend to divide income, savings, property and debts if the marriage later ends in divorce. It can also address maintenance and pensions. A prenup is a private agreement between the couple, not a court order, and on its own it is not automatically enforceable in England and Wales. Citizens Advice explains that pre-nuptial and post-nuptial agreements can be legally binding unless a court considers them unfair, which is the key qualifier: the agreement's terms, and how it was reached, determine how much weight a court gives it later. A prenup is different from a postnuptial agreement, signed after the wedding, and from a cohabitation agreement, which covers unmarried couples.

Are Prenuptial Agreements Legally Binding in England and Wales?

Not automatically. The leading case is Radmacher v Granatino [2010] UKSC 42, in which the Supreme Court held that a court should give effect to a nuptial agreement that is freely entered into by each party with a full appreciation of its implications, unless, in the circumstances prevailing, it would not be fair to hold the parties to it. This did not turn prenups into binding contracts in the way they can be elsewhere. A court keeps its full discretion under the Matrimonial Causes Act 1973 to decide the eventual financial settlement, and a prenup remains a factor the court weighs, albeit often a decisive one. In practice, a fair, properly made prenup is very likely to be followed, while one that leaves a party or a child without their needs met, or one signed under pressure, is more likely to be departed from.

What Makes a Prenup More Likely to Be Upheld?

Following Radmacher, family law practice has settled on a set of practical steps that make it more likely a court will hold the parties to a prenup's terms. None of these guarantees a particular outcome for a particular couple; they are the factors a court looks at when deciding whether it is fair to hold the parties to the agreement.

• Both parties took independent legal advice, from separate solicitors, before signing.
• Both parties gave full and frank disclosure of their financial circumstances.
• The agreement was signed in good time before the wedding, commonly at least 28 days beforehand, so neither party felt rushed into signing close to the ceremony.
• Neither party was under duress, undue pressure, or unfair advantage-taking when they signed.
• The terms still meet each party's needs, and the needs of any children, rather than leaving one party or a child without reasonable provision.

Postnuptial Agreements

A postnuptial agreement covers the same ground as a prenup, dividing money and property if the marriage ends, but is signed after the wedding rather than before it. Courts assess a postnup using the same Radmacher framework: whether it was freely entered into, with a full appreciation of its implications, and whether it would be fair to hold the parties to it. Couples sometimes choose a postnup where they married without a prenup, where their financial circumstances have changed significantly since the wedding, such as an inheritance or a new business, or where they want to record an agreement reached as part of a reconciliation. As with a prenup, a postnup cannot remove the court's ultimate discretion on divorce, and independent legal advice and full disclosure from both sides remain central to how much weight it is likely to be given.

Prenuptial Agreements in Scotland

Scotland treats marriage contracts differently from England and Wales. Scots law has long treated a properly made prenuptial or marriage contract as an ordinary contract between the parties, which means it is generally more readily enforceable than the equivalent agreement south of the border. Citizens Advice Scotland confirms that prenuptial agreements are legally enforceable by the Scottish courts, while still recommending that anyone considering one takes legal advice first. This does not mean a Scottish court has no oversight: under section 16 of the Family Law (Scotland) Act 1985, it can set aside or vary an agreement, or any term of it, that was not fair and reasonable at the time it was entered into, or a periodical allowance term where the agreement itself allows later variation. The test looks at fairness when the agreement was signed, so an agreement that was fair then will usually be enforced even if it later seems ungenerous. The practical effect is that a properly drafted marriage contract carries more independent legal force in Scotland than the equivalent document does in England and Wales, where it remains persuasive but not, by itself, contractually binding on the divorce court.

Prenuptial Agreements in Northern Ireland

Northern Ireland has no statute on prenuptial agreements. In B v B [2024] NIFam 14, the High Court in Northern Ireland noted there appeared to be no Northern Ireland authority on prenups and said Northern Irish courts should adopt and follow the principles in Radmacher v Granatino, because they concern materially identical statutory provisions. In practice, the England and Wales approach described above is the best guide to how a Northern Ireland court is likely to weigh a prenup.

What a Prenup Cannot Do

In England and Wales, a prenup cannot oust a court's jurisdiction to make financial orders on divorce. A court will not let it prejudice the reasonable requirements of any children, and is unlikely to hold a party to terms that leave them without their needs met. Scotland is different: as explained above, a Scottish agreement that was fair and reasonable when it was made will usually be enforced. In England and Wales, the court's financial powers on divorce come from section 25 of the Matrimonial Causes Act 1973, and a prenup is a factor the court weighs alongside income, needs, resources, the standard of living during the marriage, and the length of the marriage, among others. See financial settlement on divorce for how the court approaches that wider discretion where there is no prenup, or where a prenup does not cover everything the court must decide. A prenup also does not replace a formal financial consent order following a divorce; couples who want their agreement finalised generally still need to convert it into a court order at the point of divorce.

A Proposed Change: Qualifying Nuptial Agreements

A government consultation, A Fairer End to Relationships, ran from 5 June to 14 August 2026, inviting views on reforming financial remedies on divorce in England and Wales. Among other things, it invited views on introducing qualifying nuptial agreements, which would enable couples to make binding financial arrangements in advance of divorce, rather than agreements simply carrying decisive weight. This builds on the Law Commission's 2014 report, Matrimonial Property, Needs and Agreements, which recommended qualifying nuptial agreements subject to procedural safeguards, and said they could not be used to contract out of meeting each other's and any children's financial needs. The consultation has closed and, as of late September 2026, no legislation has been introduced, so this is not the law; the Radmacher test described above is still how courts assess a prenup's weight in England and Wales.

For how a court decides money and property on divorce where there is no prenup, or where a prenup does not settle everything, see financial settlement on divorce. For how divorce itself works in England and Wales, see divorce process. Unmarried couples who want similar clarity can look at cohabiting couples' rights, since a prenup only applies where a couple marries. For the wider picture across nations, see our UK family law hub, part of our guide to United Kingdom law.

This article explains how prenuptial and postnuptial agreements are treated in England, Wales, Scotland and Northern Ireland in general terms; it is not legal advice, and it does not set out or draft agreement wording for any individual's circumstances. Whether a particular agreement would be upheld depends on the facts of the case, and only a court can decide that. Anyone considering a prenuptial or postnuptial agreement should get independent legal advice from a solicitor before signing, and can get free general guidance from Citizens Advice or, in Scotland, Citizens Advice Scotland.

Frequently Asked Questions

Is a prenuptial agreement legally binding in the UK?

Not automatically in England and Wales. Following Radmacher v Granatino [2010] UKSC 42, a court will give a prenup decisive weight if it was freely entered into with a full appreciation of its implications and it would be fair to hold the parties to it, but the court keeps its overall discretion on divorce. In Scotland, a properly made marriage contract is generally more readily enforceable as an ordinary contract. Northern Ireland has no statute on prenups, but its High Court has said Northern Irish courts should follow Radmacher.

What did Radmacher v Granatino decide?

In Radmacher v Granatino [2010] UKSC 42, the Supreme Court held that courts should give effect to a nuptial agreement that is freely entered into by each party with a full appreciation of its implications, unless it would not be fair to hold the parties to it in the circumstances. It confirmed that no agreement can override the court's powers under the Matrimonial Causes Act 1973.

What makes a prenup more likely to be upheld?

Courts look at whether both parties had independent legal advice, gave full financial disclosure, signed the agreement well before the wedding rather than at the last minute, were free from pressure or duress, and whether the terms still meet each party's needs and the needs of any children.

Do we both need our own solicitor for a prenup?

It is not a strict legal requirement, but independent legal advice for each party is one of the factors that makes a prenup more likely to be upheld under the Radmacher test. Without it, a court is more likely to find the agreement was not entered into with a full appreciation of its implications.

Is a postnuptial agreement the same as a prenup?

A postnuptial agreement covers similar ground, dividing money and property if the marriage ends, but is signed after the wedding rather than before it. Courts apply the same Radmacher test to decide how much weight to give it.

Are prenuptial agreements enforceable in Scotland?

Yes, more readily than in England and Wales. Scots law treats a properly made marriage contract as an ordinary contract, and Citizens Advice Scotland confirms prenuptial agreements are legally enforceable by the Scottish courts, though a court can still set aside or vary an agreement that was not fair and reasonable at the time it was entered into.

Can a prenup stop a court making its own decision on divorce?

No. A prenup cannot remove a court's jurisdiction to make financial orders on divorce in England and Wales. A court will not let it prejudice the reasonable requirements of any children, and is unlikely to hold a party to terms that leave them without their needs met. It is a significant factor the court weighs, not a substitute for the court's decision.

Are prenups about to become legally binding in the UK?

Not yet. A government consultation, A Fairer End to Relationships, ran from 5 June to 14 August 2026 and invited views on introducing qualifying nuptial agreements in England and Wales, which would let couples make binding financial arrangements in advance of divorce. The consultation has closed and, as of late September 2026, no legislation has been introduced, so this is not current law; the Radmacher test still applies.