Can You Change Your Antenuptial Contract After Marriage?

Why couples want to change their matrimonial property regime

The reasons vary, but a handful come up repeatedly. A spouse going into business, or becoming a director or member of a company, often wants out of community of property so that a joint estate is not exposed if the venture runs into debt. Couples who married young and signed a standard out of community contract without accrual sometimes want to add fairness back into the arrangement later in the marriage. Blended families planning for children from earlier relationships often restructure their regime as part of broader estate planning. Some couples simply signed whatever contract their families or the moment suggested at the time, and years later want a system that better reflects how they actually manage money together.

The law allows it, but not with a simple signature

South African couples cannot just draw up a new antenuptial contract and sign it once they are already married. The rules that let you change matrimonial property regime after marriage sit in section 21 of the Matrimonial Property Act 88 of 1984, and they are considerably stricter than the process for signing an antenuptial contract before a wedding. Before marriage, a notary can prepare and register an antenuptial contract without any court involvement. After marriage, both spouses must apply jointly to the High Court for leave to change their matrimonial property system, and the court has to be satisfied there are sound reasons for the change and that no other person, particularly a creditor, will be prejudiced by it.

What the High Court application involves

The application is brought by both spouses together, supported by an affidavit that sets out why the change is being sought and gives a full account of each spouse's assets and liabilities. Because the court is primarily concerned with protecting creditors, notice of the intended change must be given to the Registrar of Deeds and published in the Government Gazette and in two local newspapers, generally at least two weeks before the date the application is due to be heard. Known creditors must also be notified directly, usually by registered post, so that they have the opportunity to object if the change could leave them worse off. If the court grants leave, the couple then signs a notarial contract recording the new regime, which must be registered at the Deeds Office before it takes legal effect.

Timeline, cost, and what happens if you delay

Because of the disclosure, publication, and notice periods involved, a postnuptial application is not something that can be finalised overnight. From first instructing an attorney to final registration of the notarial contract, the process commonly takes a few months rather than weeks, and professional fees are generally higher than for a straightforward pre-marriage antenuptial contract because of the court application, the affidavits, and the advertising costs involved. It is worth stressing that the new regime only takes effect once the notarial contract is actually registered, not from the date the court grants leave. Couples who obtain a court order and then delay registration remain married under their old regime in the meantime, which matters a great deal if one spouse is sued, sequestrated, or dies before the paperwork is finalised.

Whether changing your matrimonial property regime makes sense depends on your specific circumstances, including what debts either spouse carries, how your assets are structured, and what you are trying to protect. Because the process involves a High Court application, full financial disclosure, and formal notice to creditors, it is not something to attempt without proper legal guidance from the outset. If you are considering a postnuptial contract, our antenuptial contracts team at Levine and Freedman can advise on whether a change is justified in your circumstances and guide you through the application from start to finish.