Sunset Prenup Template for England and Wales

Following the Radmacher v Granatino case, English courts give substantial weight to prenuptial agreements, including sunset clauses, provided they meet certain criteria. The agreement must be freely entered into with full financial disclosure, legal advice, and fair terms. While not automatically legally binding like contracts, courts will likely uphold a properly drafted sunset prenup unless circumstances have changed significantly or it would cause manifest unfairness.

A sunset prenup includes specific clauses that automatically expire or modify the agreement's terms after certain conditions are met, such as reaching a marriage milestone or having children. Unlike standard prenups with fixed terms, sunset agreements acknowledge that longer marriages may warrant different financial arrangements. This flexibility can make them more likely to be upheld by English courts as they align with the principle that needs may change over time.

Allow at least 6-8 weeks before your wedding date to properly complete a sunset prenup. This timeframe includes initial consultations, financial disclosure, drafting, negotiations, revisions, and final signing. Starting too close to the wedding can create pressure that may invalidate the agreement, as English courts require evidence that both parties entered into it freely without undue influence.

The sunset clause will typically activate automatically according to its specific terms, regardless of whether you actively review it. However, the original agreement should specify exactly what happens when the clause triggers - whether protections expire completely, convert to different terms, or require active renegotiation. English courts will interpret these clauses according to their plain meaning and the parties' documented intentions.

English courts retain discretion under Section 25 of the Matrimonial Causes Act 1973 to override any prenuptial agreement if it would cause manifest unfairness or fail to meet parties' needs. However, properly drafted sunset prenups that include fair sunset clauses are more likely to be upheld because they demonstrate the parties anticipated changing circumstances. Courts particularly consider whether the agreement provides adequately for children and dependent spouses.

You should review your sunset prenup immediately if you have children, as this may constitute a significant change in circumstances. English courts prioritise children's welfare, and your original agreement may not adequately address child maintenance obligations. Consider whether the sunset clause should trigger early or if you need a supplementary agreement to ensure the arrangement remains fair and legally robust.

Major mistakes include failing to obtain independent legal advice, inadequate financial disclosure, signing too close to the wedding date, and drafting vague sunset clauses that don't clearly specify what happens when triggered. Other errors include not considering future children, setting unrealistic sunset conditions, and failing to review the agreement when circumstances change significantly before the sunset date.