If you are thinking about entering a prenuptial agreement, you have probably wondered whether you really need an attorney for a prenup or whether you can simply draw up a document yourselves. In Australia, the answer is straightforward: independent legal advice from a qualified lawyer is not optional. Without it, the agreement is legally invalid. Understanding exactly what a prenup attorney does, what the process looks like, and how much it costs can help you approach the whole experience with confidence rather than anxiety.
What a prenup actually is under Australian law
Australia does not use the term "prenuptial agreement" in legislation. Instead, these arrangements are called Binding Financial Agreements (BFAs) and are governed by the Family Law Act 1975. A BFA made before marriage operates the same way as what most people call a prenup: it records how assets, liabilities, and financial resources will be divided if the relationship breaks down.
BFAs can also be made during a marriage or de facto relationship, or after separation. However, a pre-marriage agreement gives couples the clearest starting point, setting financial expectations before they are complicated by shared property, children, or years of intertwined finances. If you want a deeper understanding of how these documents operate day to day, our guide on binding financial agreements: what they are and how they work covers the full framework.
Why an attorney is legally required, not just recommended
Section 90G of the Family Law Act 1975 sets out the requirements that make a BFA binding. One of those requirements is that both parties must receive independent legal advice before signing. That means each person needs their own separate lawyer. One attorney cannot act for both parties, because that would create a conflict of interest.
The advice must cover at least two things: the effect of the agreement on the rights of that party, and the advantages and disadvantages of entering into the agreement at the time it is made. Once the advice has been given, the lawyer must provide a signed statement confirming that the advice was provided. That statement is attached to the agreement itself.
If this requirement is not satisfied, a court can set the agreement aside entirely. The agreement might be perfectly fair on its face, but without the certificates of independent legal advice, it simply will not hold up. This is why choosing the right attorney for your prenup matters so much from the very beginning.
What to look for in a prenup attorney
Not every family lawyer works on BFAs regularly. When choosing an attorney, look for someone who specialises in family law rather than a generalist practitioner. Specific things to consider include:
- Experience with BFAs: Ask directly how many BFAs the lawyer has drafted or advised on. This is a technical area and experience counts.
- Clear communication: Your lawyer must be able to explain complex financial and legal concepts in plain terms so that your consent is fully informed.
- Willingness to negotiate: A good attorney will flag terms that are unreasonable or unenforceable and advise you accordingly, rather than simply rubber-stamping whatever the other party has proposed.
- Turnaround time: Agreements should not be rushed or signed immediately before a wedding. Courts have set aside agreements where one party was pressured to sign at the last minute. Your attorney should allow enough time for proper review and, if necessary, negotiation.
For those based in New South Wales, our article on prenup lawyer in Sydney: what to expect and why it matters walks through what the process looks like in practice, including timelines and what documents you will typically need to prepare.
How much does a prenup attorney cost in Australia?
Costs vary depending on the complexity of your financial situation, the law firm you choose, and how much negotiation is required. As a general guide, legal fees for each party receiving advice on a straightforward BFA can range from around $1,500 to $3,000 or more. If the agreement is complex, involving business interests, investment portfolios, or offshore assets, total legal costs for both parties can be considerably higher.
It is worth reframing how you think about this cost. A well-drafted agreement protects what you have built and avoids the far greater expense of contested property proceedings later on. Property disputes after separation can run into tens of thousands of dollars in legal fees and take years to resolve. An upfront investment in proper legal advice is, for most people, genuinely good value.
What happens if a BFA is challenged or set aside
Even with proper legal advice in place, a BFA can still be challenged in court under certain circumstances. Grounds for setting aside an agreement include fraud, a material change in circumstances (such as the birth of a child), or if enforcing the agreement would cause a party unconscionable hardship. Duress and undue influence are also grounds courts have recognised.
This is another reason why the quality of the legal advice matters so much. An attorney who spots potentially unfair terms, advises against signing, and documents that advice properly is providing a real layer of protection for their client. If you are concerned about whether an existing agreement could be challenged, our article on whether you can change or set aside a binding financial agreement explains the specific legal grounds in detail.
Timing your prenup correctly
Courts look closely at the circumstances surrounding the signing of a BFA. An agreement signed the day before a wedding, or under any kind of pressure, raises serious questions about whether genuine consent was given. Family law practitioners generally recommend starting the process at least three to six months before the planned wedding date. This gives both parties time to obtain independent advice, review the terms carefully, and negotiate any changes without feeling rushed.
Starting early also means both attorneys have time to correspond and address any concerns, rather than simply approving a document under time pressure. Your prenup attorney should be willing to raise questions and push back on terms that do not serve your interests. That is, after all, the whole point of independent advice.
Taking the next step
A prenuptial agreement is one of the most practical things a couple can do before getting married, particularly where one or both parties bring significant assets, businesses, or children from previous relationships into the union. The process works best when both parties approach it honestly, allow enough time, and each engage a qualified attorney who gives them genuine, frank advice.
If you would like to speak with a family lawyer about a binding financial agreement, Rockwell Family Law Services is available to help. We will take the time to understand your situation, explain your options clearly, and make sure any agreement you sign genuinely protects your interests.