A prenuptial agreement, formally known in Australia as a binding financial agreement (BFA), is one of the most practical steps a couple can take before getting married or moving in together. Yet many Australians put it off, assume it is only relevant for the very wealthy, or simply feel awkward raising the subject. The reality is that the right time to get a prenup depends more on your personal circumstances than on the size of your bank account. Getting the timing right can mean the difference between an agreement that holds up and one that is rushed or overlooked entirely.
What is a prenup in the Australian context?
In Australia, a prenup is a binding financial agreement made under the Family Law Act 1975 (Cth). It sets out how assets, liabilities, and financial resources will be divided if the relationship breaks down. BFAs can be made before marriage, during marriage, before a de facto relationship formalises, or even after separation. However, the agreements made before a relationship begins tend to offer the clearest protection, because both parties are entering them with fresh eyes and no existing disputes.
If you want to understand more about what these agreements can and cannot cover, our article on what a prenup can and cannot do in Australia explains the limits and strengths in practical terms.
When a prenup makes the most sense
There is no single moment that triggers the need for a prenup, but several life situations make them particularly valuable.
You own property or significant assets before the relationship
If you are entering a relationship already owning real estate, investments, or superannuation, a prenup can ring-fence those assets so they are not drawn into any future property settlement. Without one, assets you owned well before the relationship began can still be considered part of the shared pool, depending on how they were used or maintained during the relationship.
You own or co-own a business
Business ownership adds considerable complexity to any separation. A business you built before or during a relationship may be subject to a claim from your former partner. A well-drafted prenup can define what the business is worth at the time of the agreement and limit or exclude a partner's claim against it. This is one of the most common reasons people seek a BFA.
You are entering a second marriage or relationship
If you have been through a separation before and have accumulated assets, children from a prior relationship, or financial responsibilities to a former partner, a prenup helps you protect what you have built and provides certainty for everyone involved, including your children.
There is a significant wealth gap between partners
When one partner is considerably wealthier, a prenup can protect the wealthier party while also clarifying what the other partner is entitled to. Far from being one-sided, a well-structured agreement can give both people financial certainty from the start.
You are expecting an inheritance
If you expect to receive a significant inheritance during the relationship, a prenup can specify that it remains separate property. Without this, an inheritance received after the relationship begins may be treated as a joint asset in a settlement.
You are in a de facto relationship
Many Australians do not realise that de facto couples have similar property rights to married couples after just two years of cohabitation, or sooner if there is a child involved. A BFA can be made before or during a de facto relationship to manage those rights proactively. Our overview of de facto break up entitlements in Australia explains why this matters even when marriage is not part of the picture.
When is it too late to get a prenup?
Technically, you can enter a financial agreement at almost any stage, including during a relationship or even at the point of separation. However, agreements made under the pressure of a breakdown are far more vulnerable to legal challenge. They are more likely to be set aside by a court on grounds such as duress, unconscionable conduct, or inadequate independent legal advice. The earlier you address financial arrangements, the stronger the resulting agreement tends to be.
The importance of independent legal advice
For a BFA to be enforceable in Australia, both parties must receive independent legal advice from a qualified lawyer before signing. This is not optional. The lawyer must advise each party on the effect of the agreement and the advantages and disadvantages of entering into it. If this requirement is not met, the agreement can be set aside entirely, leaving both parties without the protection they thought they had. This is why finding the right legal support matters as much as the timing itself.
To understand exactly what the courts look for when assessing whether an agreement will hold, take a look at our article on what makes a binding financial agreement enforceable.
How to approach the conversation with your partner
Raising the idea of a prenup can feel uncomfortable, but framing it correctly helps. A prenup is not a prediction that the relationship will fail. It is a practical document that protects both parties, reduces the potential for conflict if things do not work out, and allows you both to enter the relationship with transparency about finances. Many couples find that negotiating a prenup strengthens their relationship by prompting honest conversations about money that might otherwise never happen.
The best time to start that conversation is well before any wedding or cohabitation date, giving both parties enough time to seek legal advice without feeling rushed. Leaving it to the last minute creates pressure that can undermine the agreement's validity.
Getting started
If any of the situations above sound familiar, it is worth speaking with a family lawyer sooner rather than later. A solicitor experienced in binding financial agreements can help you understand what protections are realistic, how to structure the agreement fairly, and what legal requirements must be met to make it stick. At Rockwell Family Law Services, we take the time to understand your specific circumstances and help you put an agreement in place that genuinely protects your interests.