What Is Prenuptial Agreement | A Guide To Financial Security

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26/02/2026

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What Is a Prenuptial Agreement | A Guide To Financial Security

Around 32% of Australian marriages end in divorce. That’s nearly one in three couples who’ll eventually need to divide assets, negotiate financial settlements, and navigate the complex process of property separation. For many, this becomes one of the most stressful and costly experiences of their lives.

A prenuptial agreement – known legally in Australia as a Binding Financial Agreement – provides couples with a means to establish clear financial boundaries before entering into marriage. It’s not about planning for failure. It’s about protecting both partners’ interests and preventing potential disputes before they arise.

What Is Prenuptial Agreement and should I draft one?

Key Takeaways

  • A prenuptial agreement (Binding Financial Agreement) is a legally enforceable contract made before marriage that outlines how assets and finances will be managed if the relationship ends.
  • They’re governed by Section 90B of the Family Law Act 1975 and require both parties to receive independent legal advice.
  • These agreements protect pre-marital assets, clarify financial expectations, and can significantly reduce conflict if the marriage dissolves.
  • Courts can set aside agreements obtained through fraud, duress, lack of disclosure, or if they’re deemed grossly unfair.
  • Typical costs range from $5,000 to $10,000, depending on complexity and asset levels.

What Is a Prenuptial Agreement in Australia?

A prenuptial agreement is a written contract between two individuals planning to marry that outlines how their property, assets, and financial resources will be managed during the marriage and in the event of separation.

Under Australian family law, these agreements are formally called Binding Financial Agreements (BFAs). The term “prenup” is the common name most Australians use. While both terms describe the same legal document, understanding the formal designation matters when you’re discussing your options with a family lawyer.

These agreements are governed by Section 90B of the Family Law Act 1975 for married couples. Similar provisions under Sections 90UA to 90UN apply to de facto couples, including same-sex relationships, in all states except Western Australia.

When properly executed, a Binding Financial Agreement removes the Federal Circuit and Family Court of Australia’s jurisdiction over the matters covered in the agreement. This means if you separate, the court generally can’t override what you’ve agreed to in your prenup.

Will a prenup affect my inheritance rights

Why Couples Consider Prenuptial Agreements

More Australians are entering marriages with significant assets than in previous generations. The median age at marriage has increased – women now marry at 30 years and men at 31, according to the Australian Institute of Family Studies. This means couples often bring established careers, property ownership, superannuation, and investments into their marriages.

Several situations make prenuptial agreements particularly valuable:

  • Second marriages with children: If you’ve been married before and have children from that relationship, a prenup protects your ability to pass assets to those children. 
  • Significant asset disparity: When one partner owns substantially more property, runs a business, or expects a large inheritance.
  • Business protection: Business owners use prenups to shield their companies from property settlement proceedings. 
  • Debt protection. A prenup can specify that pre-existing debts remain the responsibility of the person who incurred them.

Do I need legal counsel if I want to draft a prenup

Essential Components of a Binding Financial Agreement

A well-drafted prenuptial agreement addresses multiple financial aspects of your relationship:

Asset and Liability Division

The agreement details how existing and future assets will be divided if you separate. This includes real estate, investments, bank accounts, vehicles, and personal property. It also covers how debts and liabilities will be allocated.

Superannuation

Your agreement should specifically address superannuation entitlements. These can be split between parties under superannuation splitting rules, but the prenup must use precise language that complies with those rules.

Spousal Maintenance

You can include provisions about financial support after separation. Some couples agree to waive maintenance entirely, while others specify amounts or timeframes for support payments.

Inheritance and Estate Planning

The agreement can protect inheritance rights, particularly important when you have children from previous relationships or want to preserve family assets.

Confidentiality Provisions

Many agreements include clauses preventing either party from publicly discussing financial details or private matters related to the marriage or divorce.

If you’re facing a relationship breakdown without a prenup in place, experienced divorce solicitors can guide you through the property settlement process. For couples in unmarried relationships, de facto lawyers provide similar guidance under different legislative provisions.

Legal Requirements for Valid Prenuptial Agreements

For a prenuptial agreement to be legally binding under Australian law, it must meet strict criteria set out in the Family Law Act 1975:

  1. Independent legal advice. Both parties must receive advice from separate solicitors. 
  2. Full financial disclosure. Both partners must fully disclose their financial positions, including all assets, liabilities, superannuation, and financial resources. 
  3. Written and signed. The agreement must be in writing, expressly state it’s made under Section 90B of the Family Law Act 1975, and be signed by both parties.
  4. Voluntary agreement. Both parties must enter the agreement freely, without duress, coercion, or undue influence. 
  5. Fair and reasonable. While you have significant freedom to structure your agreement, provisions that create severe hardship or leave one party destitute may be challenged.

According to the Federal Circuit and Family Court of Australia, a valid financial agreement “ousts the Court’s jurisdiction” – meaning the court generally can’t make orders inconsistent with your agreement.

Despite being legally binding, prenuptial agreements aren’t bulletproof. If these legal requirements aren’t met, the court may be able to set aside agreements.

What is prenuptial agreement enforceability in case of divorce?

Investment in Your Financial Future: Prenup Costs

Drafting a prenuptial agreement typically costs between $5,000 and $10,000 in Australia.. This investment varies based on several factors:

  • Complexity of assets. More properties, businesses, or intricate financial structures require more detailed agreements and increase legal fees.
  • Negotiation time. If you and your partner need multiple sessions to agree on terms, legal costs rise accordingly.
  • Lawyer experience. Specialist family lawyers charge higher rates but often provide more comprehensive protection.
  • Updates and amendments. Reviewing or amending your agreement as circumstances change involves additional fees.

A well-drafted prenup is cost-effective insurance. It provides clarity, reduces conflict, and potentially saves tens of thousands in legal fees if your marriage ends.

Protecting Your Future Starts with Clear Agreements

Divorce rates in Australia have reached their lowest level in 50 years. But while marriages are lasting longer than previous generations, around one-third will still end in divorce.

A prenuptial agreement isn’t pessimistic planning. It’s a practical tool that protects both partners’ financial interests while promoting open communication about money. Couples who discuss finances honestly before marriage often build stronger, more resilient relationships.

The key is working with experienced family lawyers who understand the technical requirements under the Family Law Act. If you’re considering marriage and want to protect your financial future, speaking with a family lawyer about a prenuptial agreement is an essential first step. For couples facing separation without a prenup, professional legal guidance remains crucial. 

At Townsville Family Lawyers, our experienced team provides clear, practical advice on prenuptial agreements and all aspects of family law. We understand the emotional and financial challenges of relationship transitions and work to protect your interests while minimising conflict.

At Townsville Family Lawyers, you will always speak to a Lawyer