Will your prenup finally be binding? What Qualifying Nuptial Agreements mean for high-net-worth couples
| Written by Kelly EdwardsManaging Partner, Edwards Family Law Solicitor, regulated by the Solicitors Regulation Authority (SRA No 658249). Firm ranked in Chambers and Legal 500.Kelly is the managing partner of Edwards Family Law, a boutique London firm specialising in complex divorce and family law for high-net-worth and ultra-high-net-worth clients. She has over 15 years’ experience advising on complex financial matters, including business valuations, offshore assets and trusts, non-disclosure, and pre- and post-nuptial agreements. |
Prenuptial agreements are not automatically binding in England and Wales. That may be about to change. The government’s 2026 consultation proposes making certain agreements legally binding for the first time. This guide explains what is being proposed, where the law stands today, and what you can sensibly do now.
| Will prenups become legally binding in the UK? Not yet. Prenuptial agreements are not automatically binding in England and Wales, but the courts already give a well-made agreement significant weight following Radmacher v Granatino. The government’s 2026 consultation, “A Fairer End to Relationships,” proposes Qualifying Nuptial Agreements (QNAs), which would make prenups and postnups binding where the couple entered them voluntarily, exchanged financial disclosure, took independent legal advice, and provided for each other’s and any children’s reasonable needs. |
Where the law stands today
At present, a prenup is persuasive, not binding. The leading authority is Radmacher v Granatino [2010] UKSC 42, in which the Supreme Court held that a court should give effect to an agreement freely entered into by each party, with a full appreciation of its implications, unless in the circumstances it would not be fair to hold the parties to it.
In practice, a well-drafted prenup carries real weight. But the court keeps an overriding duty to reach a fair outcome and to make sure both spouses’ and any children’s needs are met. It can depart from an agreement where enforcing it would be unjust.
What a Qualifying Nuptial Agreement would change
The proposal would let couples enter an agreement a court must uphold, provided certain safeguards are met. Based on the Law Commission’s 2014 recommendations, a QNA is expected to be valid only where each of the following is true.
The four expected safeguards
Both parties enter it voluntarily, without pressure or undue influence.
There is material financial disclosure, so each party understands what the other has.
Both take independent legal advice before signing.
It meets reasonable needs, leaving neither party, nor any children, unable to meet their reasonable financial needs.
The headline shift is certainty. Instead of hoping a judge gives weight to your agreement, a compliant QNA would be enforceable as a right within those limits.
Prenup now versus a Qualifying Nuptial Agreement
| A prenup today | A QNA (proposed) | |
|---|---|---|
| Legal status | Persuasive, but the court has the final say | Binding where safeguards are met |
| Independent legal advice | Strongly recommended | Required |
| Financial disclosure | Strongly recommended | Required |
| Entered voluntarily | Key factor | Required |
| Meets needs of spouse and children | Court checks fairness | Cannot be contracted out of |
| Court’s power to override | Yes, to achieve fairness | Limited to the needs safeguard |
Why this matters more when there is substantial wealth
For high-net-worth couples, the stakes are rarely a modest savings account. They are operating businesses, pre-marital and inherited wealth, property portfolios, trust interests, and often assets across more than one jurisdiction.
A binding agreement helps protect family or business wealth, define what happens to assets brought into the marriage, and reduce the cost, delay, and uncertainty of a contested claim later. For clients who value discretion, it also keeps sensitive financial details out of a courtroom. Our page on high-net-worth divorce sets out how these cases are handled.
| We acted for a client who had a long-established business worth circa £50m at the time of marriage and wanted to protect that. When the parties separated 3 years later, the business was completely protected from claims as the remaining provision within the agreement ensured the other parties’ needs were met. |
What you can do now, before any law changes
There is no need to wait for legislation. Because of Radmacher, a carefully prepared agreement is already highly persuasive, and the steps that make a prenup strong today are the same safeguards a QNA is expected to require.
If you are planning to marry, put the agreement in place well before the wedding rather than in the final days. Make full and honest disclosure of your finances. Ensure both of you take separate, independent legal advice. Keep the terms realistic about future needs, because an agreement that leaves one spouse or the children unprovided for is the most likely to be set aside.
If you are already married, a postnuptial agreement can achieve much the same. And if you have an existing agreement, it is worth reviewing it against the expected QNA safeguards. You can read more about our pre- and post-nuptial agreement work here.
A note of caution
This is a consultation, not settled law. The proposals may change, and there is no confirmed date for legislation. Even under the proposed regime, couples are not expected to be able to contract out of meeting the reasonable needs of children or a financially weaker spouse.
The direction of travel is clear, though. Nuptial agreements are moving from persuasive to potentially binding, and couples who prepare properly now will be best placed whatever the final shape of the reforms.
If you are considering a pre- or postnuptial agreement or want an existing agreement reviewed, contact the team at Edwards Family Law. This article is general information about the law in England and Wales and is not a substitute for advice on your own circumstances.