Can an Antenuptial Contract Be Signed After Marriage?

No. An antenuptial contract cannot be signed after marriage. The word antenuptial means before the wedding, and the contract must be executed before a notary and signed before the marriage is solemnised. Once you are married without an ANC, you are automatically married in community of property, and the only way to change that afterwards is a High Court application under section 21(1) of the Matrimonial Property Act 88 of 1984.

Couples discover this at the worst times: when a business is launched, when creditors circle, or during divorce negotiations. The good news is that the position is not hopeless. The court application route works, and it is used regularly. The bad news is that a “postnuptial contract” signed at a notary alone, without a court order, changes nothing about the matrimonial property regime.

This guide explains why an ANC must precede the wedding, what section 21(1) requires, what the application costs and involves, and how to avoid the trap entirely.

Why the Contract Must Be Signed Before the Wedding

South African law applies a default matrimonial property regime. If a couple marries without executing an antenuptial contract, the marriage is automatically in community of property: the spouses’ estates merge into one joint estate, and each spouse becomes jointly liable for the other’s debts.

An ANC opts out of that default. It must be signed before a notary public before the marriage, and it is then registered in the Deeds Office within the prescribed period. Because the regime is fixed at the moment the marriage is solemnised, a document signed after the wedding cannot operate as an antenuptial contract, no matter what it is called or who drafts it.

The Exception: Section 21(1) of the Matrimonial Property Act

The Matrimonial Property Act 88 of 1984 provides one lawful route to change the matrimonial property regime after marriage. Under section 21(1), spouses married in community of property may jointly apply to the High Court for leave to change their regime. The court grants the application only if:

• There are sound reasons for the change, such as a new business venture, creditor risk, estate planning or a genuine commercial need.
• The rights of creditors are adequately protected, which in practice means registered notice to all known creditors.
• The change is not prejudicial to any minor children of the marriage.

The application is brought by both spouses jointly, with the proposed notarial contract annexed. If the court is satisfied, it authorises the notary to execute and register a contract that then regulates the spouses’ property as if it had been an ANC.

How the Section 21(1) Application Works

1. Both spouses instruct an attorney, agree on the new regime, with or without accrual, and settle the terms of the notarial contract.
2. An application is drafted setting out the sound reasons, the couple’s financial position, and the safeguards for creditors.
3. Notice of the application is given to creditors, typically by registered post and sometimes by publication, so that objections can be made.
4. The application is set down in the High Court division where the spouses live. Unopposed applications are dealt with in the ordinary motion court roll.
5. If granted, the court authorises execution of the contract before a notary, and registration in the Deeds Office completes the change.

What It Costs and How Long It Takes

A section 21(1) application is a genuine High Court process, not a formality. Costs vary with the complexity of the couple’s estate and the number of creditors, and typically run to tens of thousands of rand once attorney fees, notarial fees and Deeds Office charges are counted. Unopposed applications are usually finalised within a few months, depending on the court roll and the creditor notice periods.

That is why the exercise is compared against the alternative of simply executing an ANC before the wedding, which costs a fraction of the price and takes days. Where the wedding date has already passed, the application is the only route.

Common Mistakes to Avoid

• Signing a “postnuptial contract” at a notary and assuming it works. Without a court order under section 21(1), the matrimonial property regime is unchanged, and the couple remains in community of property despite the paper.
• Assuming one spouse can change the regime alone. The application is a joint one, brought by both spouses, and a reluctant spouse cannot be forced into it.
• Leaving out creditors. Failure to notify creditors properly is the classic ground for refusal, because the entire purpose of the safeguards is creditor protection.
• Waiting until divorce or insolvency looms. Courts look for sound reasons, and an application engineered on the eve of sequestration to shift assets away from creditors will fail and may attract personal costs orders.
• Forgetting the accrual election. Couples changing their regime must decide whether the new contract includes accrual, and that choice permanently shapes how assets divide on death or divorce.
• Assuming religious or customary ceremonies change the rules. Civil and customary marriages both default to in community of property without an ANC, and the section 21(1) route applies to both.

Get help changing your matrimonial property regime. Otrebski Attorneys’ family law team in Sandton drafts antenuptial contracts and brings section 21(1) High Court applications. Call 060 500 3098 or book an appointment.

Frequently Asked Questions

Can an antenuptial contract be signed after marriage in South Africa?

No. An antenuptial contract must be signed before a notary before the marriage. After the wedding, spouses married in community of property can only change their regime by a joint High Court application under section 21(1) of the Matrimonial Property Act 88 of 1984.

Is a postnuptial contract valid in South Africa?

Not for changing the matrimonial property regime. A contract signed after marriage without a court order has no effect on the in-community-of-property default, no matter how it is drafted. Only a section 21(1) court application can change the regime after the wedding.

How do I change my matrimonial property regime after marriage?

Both spouses jointly apply to the High Court under section 21(1) of the Matrimonial Property Act, showing sound reasons for the change, protecting creditors through proper notice, and ensuring the change is not prejudicial to minor children. If granted, a notarial contract is executed and registered in the Deeds Office.

What happens if you marry without an antenuptial contract?

The marriage is automatically in community of property. The spouses’ estates merge into one joint estate, and each spouse is jointly and severally liable for the other’s debts, including debts incurred before the marriage.

How much does a section 21(1) application cost?

Costs vary with the complexity of the estate and the number of creditors, and typically run to tens of thousands of rand once attorney, notarial and registration costs are included. Unopposed applications are usually finalised within a few months.

Disclaimer. This article is general information, not legal advice for a specific matter. Confirm matrimonial property requirements with the Deeds Office or an admitted attorney. Otrebski Attorneys’ family law department in Sandton drafts antenuptial contracts and brings High Court applications.