Bringing up the benefits of a prenup with the person you are about to marry can feel like the least romantic conversation in the world. You love them. You are planning a life together. Raising what happens if it ends can feel like inviting the very thing you are trying to avoid.
Here is another way to see it. A prenup is not a prediction that your relationship will fail. It is a calm, considered agreement you both make while you feel generous towards each other, instead of later when emotions and money are tangled together. Many couples find the conversation actually brings them closer.
In 2024, 47,216 divorces were granted in Australia at a rate of about 2.1 per 1,000 people. The average marriage that ended had lasted just over 13 years. None of those couples expected to become a statistic on their wedding day. That is exactly why understanding the benefits of a prenup matters before you sign anything, not after.
What is a prenup in Australia?
A prenup is known legally as a Binding Financial Agreement, or BFA. It is made under the Family Law Act 1975 (Cth). You can put one in place before you marry or before you move in together as a de facto couple.
A prenup sets out how your assets, debts and finances would be divided if the relationship later breaks down. It can deal with:
- property you own now, such as a home, savings or shares
- assets you expect to receive later, such as an inheritance
- superannuation
- debts, including ones either of you brings into the relationship
- spousal maintenance
One thing a prenup cannot do is decide arrangements for children. Parenting and child support are dealt with separately, and a court always keeps the final say on what is in a child’s best interests.
The key benefits of a prenup
Protecting the assets you bring in
If you walk into a relationship with a property, savings, a business or an expected inheritance, a prenup lets you protect what was yours from the start. This matters most when there is an imbalance, for example where one partner owns a home and the other does not.
Without an agreement, those assets can be drawn into the property pool and divided if you separate, regardless of who brought them in. Family law property settlements can take the whole pool into account, including what each of you owned before the relationship started.
Protecting a business or family interests
Business owners have more than their own livelihood at stake. Staff, business partners and family members can all feel the effects if a relationship breakdown forces a business to be valued, split or sold. A prenup can quarantine a business so a personal separation does not turn into a commercial one.
Clarity and certainty about your finances
A prenup prompts an honest, upfront conversation about money. You both lay out what you own and owe, and you agree on how things would work if the worst happened. You are not left wondering “what if”, because you already have an answer.
Avoiding a costly and drawn-out dispute
Separating without an agreement can mean months of negotiation, legal fees and stress, sometimes ending in a contested court case. A prenup settles the financial questions in advance, while you are both calm and reasonable, which can soften the financial impact of divorce and separation if your relationship ends. Think of it like insurance. You do not expect your house to burn down, but you insure it anyway, because protecting what matters is sensible.
Protecting children from a previous relationship
If you have children from an earlier relationship, a prenup can help make sure the assets you want to pass on to them are not absorbed into a new property settlement. For blended families, this is often the main reason couples put an agreement in place.
Who benefits most from a prenup?
A common myth is that prenups are only for the wealthy or for celebrities with a lot to lose. That is not how it works in practice. The benefits of getting a prenup apply to all sorts of couples, including:
- people entering a second marriage or blending two families
- business owners and self-employed people
- anyone who expects an inheritance, or who has already received one
- couples where one person has significantly more assets or debt than the other
- de facto couples who want the same clarity as married couples
- couples who simply want to make their own decisions rather than leave them to a court
You do not need a large asset pool to benefit. Sometimes the most valuable thing a prenup protects is your time and your peace of mind.
Are prenups legally binding in Australia?
Yes. A properly prepared prenup is legally binding and enforceable under the Family Law Act 1975 (Cth). The phrase “properly prepared” is doing a lot of work in that sentence. For a prenup to hold up, a few things need to be true:
- it is in writing and signed by both of you
- each person receives independent legal advice from their own lawyer, not the same one
- both of you fully disclose your assets, debts and financial position
- neither person is pressured, rushed or coerced into signing
If those boxes are not ticked, the agreement can be challenged. A court can set a prenup aside for reasons such as fraud, a failure to disclose assets, duress or unconscionable conduct. In the well-known High Court case of Thorne v Kennedy, two financial agreements were set aside because one party had been placed under unfair pressure to sign shortly before the wedding.
This is why a do-it-yourself template is a false economy. A prenup is only worth having if it actually works when you need it, and that depends on getting the preparation right.
What to think about before you sign a prenup
A prenup is a serious legal document, so it is worth going in with your eyes open.
1. Start early.
Raising it well before the wedding gives you both time to think, get advice and negotiate. An agreement signed days before the ceremony is far easier to challenge later.
2. Use separate lawyers.
Each of you needs your own independent advice. This is a legal requirement, not a formality.
3. Be completely honest about money.
Hiding an asset or a debt can make the whole agreement worthless.
4. Treat it as a living document.
Life changes. Many couples review their agreement after major events such as buying a home, having children or starting a business.
Frequently asked questions about the benefits of a prenup
What is the main benefit of a prenup?
The main benefit of a prenup is certainty. It sets out in advance how your finances would be divided if you separate, which protects your assets and helps you avoid a costly, stressful dispute later.
Are prenups legally binding in Australia?
Yes. A prenup, known legally as a Binding Financial Agreement, is binding under the Family Law Act 1975 (Cth) when both parties sign it in writing, each receives independent legal advice and there is full financial disclosure.
Do prenups hold up in court in Australia?
A properly prepared prenup that meets every legal requirement will generally hold up. A court can set one aside if there was fraud, non-disclosure, duress or unconscionable conduct, or if proper legal advice was not given.
Do you need a prenup if you are not wealthy?
No, you do not need to be wealthy. Prenups benefit couples of all financial situations, including those protecting modest savings, a future inheritance, a small business or children from a previous relationship.
Can de facto couples get a prenup?
Yes. De facto couples can make a Binding Financial Agreement before or during their relationship, with the same legal effect as one made by a married couple.
Can a prenup be changed or cancelled later?
Yes. You can update or terminate a prenup, but it must be done formally and in writing, with both parties again receiving independent legal advice.
How much does a prenup cost in Australia?
The cost depends on how complex your finances are and the advice involved. Because each party needs their own lawyer, it is best to ask for a clear quote upfront. Whatever it costs, it is usually far less than a contested property dispute.
Getting a prenup right with the right advice
Signing a prenup does not mean you are planning for your marriage to fail. Quite the opposite. It lets you start your life together with honesty and a shared understanding of where you both stand. Done well, it can take the fear out of a difficult topic and let you get on with the relationship itself.
The key words are “done well”. The benefits of a prenup only hold if the agreement is prepared carefully, meets every legal requirement and reflects what you both genuinely agreed to.
At Allen Evans Family Lawyers, we help couples across Sydney put pre-nuptial and pre-de facto agreements (BFAs) in place with clear, practical advice and none of the jargon. We can also help you understand your position on property settlement or spousal maintenance more broadly.
If you are thinking about a prenup, talk to us early. Call 1300 110 080 or get in touch through our enquiry form to arrange a confidential chat about your situation.
This article is intended as general information only and does not constitute legal advice. For advice specific to your circumstances, contact Allen Evans Family Lawyers on 1300 110 080 or through our enquiry form.