Planning a wedding comes with a mountain of decisions, including seating charts, menu tastings, and, for the forward-thinking couple, sitting down with a notary to draft an antenuptial contract (ANC).

When tailored correctly, an ANC offers incredible financial clarity and peace of mind. However, a common misconception exists that a prenuptial agreement acts as an all-powerful, bulletproof shield where anything goes as long as both parties sign on the dotted line.

In reality, South African law places firm boundaries around what couples can and cannot contract out of. If a clause violates statutory protections, public policy, or basic constitutional rights, the court will simply strike it out, or invalidate the contract altogether.

Here is a breakdown of the most common legal assumptions couples make about ANCs that will not hold up in court.

Myth 1: “We Can Agree to Waive Spousal Maintenance in Advance”

You cannot contractually sign away the statutory right to reciprocal duty of support during the marriage, nor can you completely lock down post-divorce maintenance options.

• During Marriage: Spouses have an automatic legal duty to support each other according to their respective means. An ANC clause stating “Neither spouse shall ever be responsible for the other’s living expenses” is void.
• Upon Divorce: While couples can agree on post-divorce maintenance terms within their ANC, courts retain ultimate discretion under the Matrimonial Affairs Act and Divorce Act. If an enforcement clause leaves one party destitute or creates severe unfairness, the court can intervene to order spousal maintenance regardless of what the agreement says.

Myth 2: “We Can Waive or Cap Child Maintenance Responsibilities”

Child maintenance rights belong to the child, not the parents.

• Statutory Duty: Both parents have a common law and statutory duty to support their children based on their financial capacity.
• Non-Negotiable Protections: Any ANC clause attempting to cap monthly child support, waive contributions, or predetermine custody/visitation in the event of a future divorce is legally unenforceable. The High Court acts as the ultimate guardian of all minors and will always prioritise the best interests of the child over a private agreement.

Myth 3: “We’ve Excluded My Retirement Fund From the ANC, So It’s Mine No Matter What”

Excluding an asset from accrual in your ANC feels like it should be the end of the conversation, particularly for a spouse entering the marriage with a well-established pension or provident fund. However, retirement funds are governed by specific legal rules that general clauses cannot always bypass.

• Distinct Legal Status: Retirement fund interests are treated as their own distinct category under the Divorce Act, separate from general property arrangements.
• Specific Drafting Required: Depending on your matrimonial property system, a portion of a retirement interest accumulated during the marriage can still be dealt with upon divorce in ways a standard exclusion clause does not automatically prevent. If a specific pension outcome matters to you, it requires explicit, tailored handling in the drafting, rather than an assumption that a general accrual exclusion covers it.

Myth 4: “We Can Insert Penalty Clauses for Infidelity or Personal Behaviour”

“Fault-based” financial penalties or lifestyle rules are unenforceable under modern family law.

• No Financial Penalties for Cheating: South African divorce law operates on an “irretrievable breakdown” system rather than a fault system. Clauses stating “If Spouse A commits adultery, they forfeit their assets” are contrary to public policy and will be thrown out.
• Personal Behavioural Rules: Clauses attempting to mandate personal conduct (e.g., weight limits, frequency of visits to in-laws, or domestic chore allocations) hold zero legal weight in an ANC.

Practical Implications

None of this means your ANC is a waste of paper. It means the document works best when it is drafted with a clear understanding of where its authority ends. A few essential steps to take before you sign:

• Seek Plain-Language Explanations: Have your notary explain, in plain terms, which clauses are enforceable property arrangements and which touch on maintenance, support, or statutory protections.
• Separate Consent from Enforceability: Don’t assume a clause is valid just because it is written clearly and both parties agreed to it. Enforceability and mutual consent are not the same thing.
• Revisit Assumptions When Circumstances Change: Review your ANC’s assumptions if your life situation shifts significantly, particularly around children, health, or if one spouse steps back from a career.
• Align Your Estate Planning: If you are marrying for a second time or blending families, get advice on how your ANC interacts with your will, as the two documents need to tell the same story.

Why Custom Legal Guidance Matters

An antenuptial contract is one of the most vital financial agreements you will ever sign. Rather than attempting to insert extreme protective clauses that risk being severed by a court, focus on structuring a clear, fair framework, whether choosing out of community of property with accrual or without accrual.

Consulting a qualified legal practitioner ensures your ANC reflects your joint intent while remaining fully compliant with South African family law.

 

While every reasonable effort is taken to ensure the accuracy and soundness of the contents of this publication, neither the writers of articles nor the publisher will bear any responsibility for the consequences of any actions based on information or recommendations contained herein. Our material is for informational purposes.