Do Prenups Hold Up in Australian Family Courts?

Binding financial agreements — commonly called prenups when signed before marriage, or postnups when signed during a relationship — are becoming a more routine part of relationship planning in Australia, not just something reserved for high-net-worth couples. But there’s a lot of confusion about how much protection they actually offer if a relationship ends. The short answer: it depends heavily on how the agreement was drafted and whether it meets the legal requirements at the time it was made.

What a Financial Agreement Actually Covers

Under Australian family law, couples can enter into a Binding Financial Agreement (BFA) that sets out how property, assets, and financial resources would be divided if the relationship ends. These agreements can be made before a marriage or de facto relationship begins, during the relationship, or even after separation. In general, a well-drafted agreement can cover the family home, superannuation, business interests, debts, and inheritances — effectively opting out of the usual property settlement process the courts would otherwise apply.

What surprises many people is that these agreements are not automatically enforceable just because both parties signed them. Courts can set aside a financial agreement in certain circumstances — for example, if one party did not receive independent legal advice, if there was fraud or non-disclosure of assets, or if enforcing the agreement would cause significant hardship to a party or a child. This is why the process for creating a valid agreement is more involved than simply drafting a document and signing it.

What the Process Typically Involves

In general, each party needs their own solicitor, separate from the other party’s lawyer, who provides independent legal advice about the effect of the agreement on that person’s rights. Each solicitor typically provides a signed certificate confirming this advice was given — and without it, the agreement may not be binding at all. Full and honest financial disclosure from both parties is usually expected as well; agreements built on incomplete or misleading financial information are one of the most common grounds for a later challenge.

Because family law in Australia is federal, the core framework for financial agreements applies nationally, but how courts interpret specific circumstances — and how family lawyers approach drafting — can vary depending on the case and the state or territory where advice is being sought. This is one of the areas where general online information is genuinely not a substitute for advice tailored to a specific relationship and asset situation.

Situations Worth Getting Advice On Early

• Entering a relationship with significantly more assets, debts, or business interests than a partner
• Blending families, where protecting assets for children from a previous relationship is a priority
• Expecting a future inheritance or already holding one that should stay separate
• Wanting to update or revisit an agreement after a major life change, such as having children or starting a business

Because financial agreements can be challenged later if they weren’t properly prepared, getting the drafting right from the start — with independent advice on both sides — matters more than getting it done quickly.

Getting Help Quickly

If you’re considering a financial agreement, or want to understand whether an existing one is likely to hold up, Request Legal Service offers a free, fast way to connect with a family lawyer in your state or territory. Submitting a request takes just a few minutes.

This article is for general informational purposes only and is not legal advice. Laws vary across Australian states and territories, and can change over time — for guidance on your specific situation, speak with a qualified solicitor or lawyer. Request Legal Service does not act as a law firm or provide legal representation.