Planning a wedding is a busy and emotionally charged time. It is not uncommon for couples to realise, sometimes only weeks or days before the ceremony, that they have not yet put a prenuptial agreement in place. If this sounds familiar, you are not alone. But it is important to understand the legal implications of signing a prenup at the last minute, and what steps you can take to protect the validity of your agreement.

At Regent Law, we regularly advise clients in time-sensitive situations. While a last-minute prenup is not automatically unenforceable, it does face additional scrutiny. This blog explains the risks, what the courts look for, and what you should do if time is short.

Why Timing Matters Legally

In England and Wales, prenuptial agreements are not automatically legally binding. The courts assess whether to uphold them based on a set of established principles, many of which flow from the landmark Supreme Court decision in Radmacher v Granatino [2010]. One of the most important considerations is whether both parties freely consented to the agreement without undue pressure.

When a prenup is signed very close to the wedding date, a court may question whether one or both parties felt unable to refuse. If the ceremony is in two days and hundreds of guests are arriving, it is difficult to argue that either party had genuine freedom of choice. This is why timing is treated as a significant factor in assessing the validity and weight of a prenuptial agreement.

The 28-Day Guideline

Best practice guidance in England and Wales points to a prenuptial agreement being signed at least 28 days before the wedding. This threshold is frequently cited by family law practitioners and is supported by judicial commentary in relevant cases.

The 28-day guideline is not a rigid legal rule, but courts take it seriously. If a prenup is signed within this window, particularly in the final few days before the wedding, the party seeking to rely on it will need to demonstrate very clearly that the other party entered into it with full understanding, free from any pressure, and after receiving proper independent legal advice.

What the Courts Will Look For

If a prenup signed just before the wedding is later challenged in court during divorce proceedings, the judge will assess several key factors. Were both parties represented by their own independent solicitors? Was there full and transparent financial disclosure on both sides? Did both parties have adequate time to read, understand, and reflect on the terms before signing? Is the content of the agreement itself fair and reasonable? Does the agreement make reasonable provision for both parties?

A prenup that fails on any of these points, particularly if it was signed under evident time pressure, is at far greater risk of being set aside. At Regent Law, we ensure that even in time-sensitive cases, each of these elements is addressed as thoroughly as possible.

Can a Last-Minute Prenup Still Be Valid?

Yes, it can. A prenup signed close to the wedding is not automatically invalid. Courts consider the full picture, and a last-minute agreement that was nonetheless entered into freely, with proper legal advice and complete financial disclosure, may still be given considerable weight.

The key is documentation and process. If you are in a time-sensitive situation, you should instruct a solicitor immediately. Do not delay further. Your solicitor at Regent Law will work efficiently to produce a robust agreement and will ensure that the process is handled in a way that maximises the document’s credibility.

The Risk of Duress

One of the most significant concerns with a prenup signed immediately before the wedding is the question of duress. English courts will not uphold a prenuptial agreement if one party was pressured or coerced into signing.

Duress does not have to be overt. The circumstances of a wedding day approaching, with financial and emotional investments already made, can themselves create a form of implicit pressure. If one party argues that they felt unable to refuse at such a late stage, this could form the basis of a challenge to the agreement’s validity.

This is why starting the prenup process early matters so much. The further in advance the agreement is completed, the harder it becomes to argue that either party felt compelled to sign.

What If Only One Party Has Instructed a Solicitor?

A valid prenuptial agreement requires both parties to have received independent legal advice. If only one person has instructed a solicitor, the agreement is at serious risk of being challenged. The other party must have their own legal representation, entirely separate from the solicitor instructing the first party.

At Regent Law, we can act for one party in a prenuptial agreement. We will always make clear to the other party that they should seek their own independent legal advice before signing. If the other party cannot or will not instruct a solicitor, we will document this clearly and advise our client on the implications.