This guide is maintained as a current resource for September 2026 and covers only the laws of England and Wales. Information is for general guidance, not legal advice. Consult a qualified solicitor for advice specific to your situation.
Explore whether prenuptial agreements can include lifestyle or behaviour clauses in England and Wales. This guide explains why personal or conduct‑based terms, such as infidelity or household expectations, are generally not enforceable in family courts and offers practical guidance on focusing on financial provisions that courts will consider.
Prenuptial agreements (prenups) are written documents entered into by couples before marriage or a civil partnership to outline how financial matters and assets should be handled if the relationship later breaks down. Prenups are recognised by the family courts in England and Wales, but they are not automatically legally binding; instead, courts consider them as part of the overall circumstances under the Matrimonial Causes Act 1973 and give weight to them if they were freely entered into, with full understanding and fair terms.
One question that often arises is whether a prenup can include clauses about lifestyle, behaviour or personal conduct, such as rewarding or penalising certain actions during the marriage. This article explains the legal framework, what courts will and will not enforce, the risks of including such clauses, and best practice in preparing an effective prenuptial agreement.
Purpose of Prenuptial Agreements
The primary purpose of a prenuptial agreement in England and Wales is to clarify financial expectations and protect assets if a marriage ends. Typical subjects include the division of property, treatment of inheritances, spousal maintenance intentions, pension rights, and allocation of debts. These topics relate directly to potential financial outcomes on divorce or dissolution.
By contrast, lifestyle or behaviour clauses - such as obligations about personal conduct, infidelity conditions, or requirements around household roles - fall outside the financial scope that courts take seriously in family proceedings.
What Are Lifestyle or Behaviour Clauses?
A lifestyle or behaviour clause is a provision inserted into a prenup that attempts to regulate personal conduct or set consequences for specific actions during the marriage. Examples might include:
- Financial penalties for infidelity.
- Rewards for achieving agreed lifestyle goals.
- Conditions relating to social media behaviour, diet or exercise.
- Requirements around household responsibilities or personal routines.
Such clauses do not directly concern financial rights or property but seek to influence personal or moral behaviour.
Legal Position in England and Wales
Courts Focus on Financial Matters
English family courts approach prenuptial agreements on the basis that they are relevant to financial matters on divorce but do not have automatic contractual force. Since Radmacher v Granatino (2010), courts should generally give effect to a prenup if it was entered into freely and with an informed understanding of its consequences, unless doing so would be unfair.
However, courts make clear distinctions between financial provisions and non‑financial personal terms. Prenups that seek to dictate personal lifestyle or behaviour are treated as outside the legitimate scope of such agreements and are unlikely to be upheld in family proceedings.
Personal and Lifestyle Matters Are Not Enforceable
Under current practice:
- Clauses about personal appearance, religious practices, social activities, or friendships are not enforceable.
- Provisions that penalise or reward behaviour - such as infidelity clauses - are generally regarded as irrelevant to financial settlement processes and may be considered frivolous or unnecessary by judges.
- Domestic arrangements (e.g. household chores or intimacy expectations) are viewed as personal matters and not subject to court enforcement under family law.
If a prenup contains such terms, a court may disregard those clauses or treat them as unenforceable without necessarily invalidating the financial parts of the agreement.
Behaviour and Infidelity Clauses
There is particular attention on clauses intended to penalise behaviour such as infidelity. While these may be popular in some jurisdictions, in England and Wales they are seen as moral or personal rather than financial, and judges may regard them as undermining the integrity of the prenup as a financial planning tool. Including such terms carries the risk that:
- The clause itself will not be given effect by the court.
- A court might view the inclusion of non‑financial terms as detracting from the seriousness or clarity of the financial provisions, although this does not automatically void the whole agreement.
- The court may focus instead on statutory financial factors such as needs, income, resources and obligations when making orders.
Why Courts Reject Lifestyle or Behaviour Clauses
Lack of Legal Relevance
Family courts determine financial settlements based on statutory principles, including meeting reasonable needs, sharing assets, and ensuring fairness. Personal conduct does not typically affect these financial calculations unless it has a direct financial impact (for example, deliberate dissipation of marital assets). Behaviour clauses that do not influence financial outcomes are therefore irrelevant to court considerations.
Public Policy Considerations
Courts refuse to enforce terms that contradict public policy or legal norms. Clauses that attempt to penalise behaviour through financial forfeiture may be seen as punitive or coercive rather than protective, and thus inconsistent with family law principles that prioritise fairness and needs.
Discretionary Nature of Family Courts
Even where a prenup is robustly drafted, courts retain discretion to depart from specified terms if enforcing them would produce an unfair result. Clauses unrelated to financial settlement may complicate this assessment and detract from the clarity of the financial provisions.
What Can Be Included Instead
While lifestyle or conduct clauses are unenforceable, prenups can effectively address financial consequences associated with behaviour in indirect ways where there is a credible financial link. For example:
- A party's decision to relinquish career opportunities to care for children might be reflected in spousal maintenance provisions.
- Deliberate dissipation of assets (a financial wrongdoing) could be addressed by stating how reductions in the asset pool should be taken into account.
Such clauses must be clearly tied to financial outcomes and drafted carefully by experienced legal advisers to ensure they reflect realistic and legally relevant scenarios.
Practical Steps for Couples
Focus on Financial Clarity
Couples should frame their agreement around assets, liabilities, income, maintenance provisions and property rights rather than personal behaviour. Clear financial language increases the likelihood that a court will consider the agreement when resolving disputes.
Seek Independent Legal Advice
Both parties should obtain independent legal advice to ensure they understand the scope and limitations of the prenup, including what can and cannot be included. This also helps demonstrate that the agreement was entered into with full understanding, which is a key factor in its persuasive value to a court.
Avoid Unenforceable Terms
Excluding lifestyle or behavioural provisions reduces the risk that a court might disregard parts of the prenup or view it skeptically. If parties wish to record personal expectations, they can do so in non‑legal documents or agreements that are not intended for family court enforcement, but these will not influence financial remedy proceedings.
Review Regularly
Couples should review their prenup periodically, particularly after significant life changes such as the birth of children or major financial developments, to ensure that the agreement remains relevant and fair.
Common Questions
Can a prenup include a clause about infidelity or “no cheating”?
No. Clauses that attempt to impose financial consequences for infidelity or similar personal behaviour are generally unenforceable in England and Wales because they do not relate to financial matters and may be seen as punitive or irrelevant in family court proceedings.
Can personal conduct affect financial settlements?
Only if the personal conduct has a clear financial impact (for example, wasting marital assets). Behavioural provisions that lack financial connection are unlikely to be upheld.
Are lifestyle clauses ever enforceable?
In this jurisdiction, they are typically not enforceable. Judges may disregard them entirely for the purposes of financial remedy proceedings.
Key Takeaways
Prenuptial agreements in England and Wales are intended to address financial and property issues in the event of divorce or dissolution. While couples may be tempted to include clauses governing lifestyle or behaviour, such terms are not enforceable in family courts because they do not relate to financial outcomes and may undermine the agreement's effectiveness. Courts focus on matters such as assets, debts, spousal maintenance and pensions, and reserve the right to set aside terms that are unfair, irrelevant or against public policy. To create a prenup that stands up to scrutiny, parties should concentrate on carefully drafted financial provisions, seek independent legal advice and avoid including personal or behavioural clauses.
