For many Australian families, the business is more than an income source. It may have been built over decades, passed down from parents, or started with the expectation that it would one day go to the children. So when a relationship ends, the question of what happens to the business can be as stressful as the breakup itself.
The good news is that a well-drafted agreement can offer real protection. Many people leave it too late, and some only look into a prenup after separation once the business is already caught up in a property dispute. Acting early gives you far more control over the outcome and usually costs far less than litigation.
How the Family Law Act Treats a Business
Under the Family Law Act 1975, a business is generally treated as property, just like a home or a superannuation account. If a couple separates and cannot agree on a division, the court looks at the whole pool of assets, including shares, company interests, trust interests and business premises. It then considers the contributions each partner made, financial and non-financial, along with each person’s future needs.
A partner who never worked in the business can still have a claim, for example by supporting the household, raising children or contributing in other indirect ways. This catches many business owners off guard. Even a business you started before the relationship can become part of the asset pool, and its value may need to be assessed by a valuer, which adds cost and delay.
What a Prenup Can Actually Do
In Australia, a prenup is formally called a binding financial agreement (BFA). It lets a couple decide in advance how assets, including a business, will be handled if the relationship ends. For a family business, a well-drafted agreement can:
- Quarantine the business. It can state that the business, and any growth in its value, stays with the original owner.
- Protect inherited or gifted interests. If you hold shares from a parent or grandparent, the agreement can record that those interests are not to be divided.
- Set out a buyout formula. Rather than forcing a sale, the agreement can specify how any entitlement would be calculated and paid.
- Support succession planning. It can help keep ownership within the family, which matters when siblings or parents are also shareholders.
- Reduce conflict and expense. Clear terms agreed in advance can keep a dispute out of court and protect the business from disruption.
The Limits of a Prenup
A prenup is not a magic shield, and it is only as strong as its drafting. To be binding, a BFA must meet strict requirements under the Act. Each party must receive independent legal advice and the agreement must be properly signed, with a certificate of advice from each lawyer. If these steps are missed, a court may set the agreement aside.
Courts can also set aside an agreement in certain circumstances, such as fraud, failure to disclose a significant asset, unconscionable conduct, or a material change in circumstances involving the care of a child. An agreement drafted years ago may no longer reflect the business or the family’s situation, so it should be reviewed when circumstances change, such as a new child, a major business expansion or a change in ownership structure.
Family businesses often involve complex structures, including discretionary trusts, company shareholdings and partnership arrangements. These need careful handling, because the wrong wording could leave a gap a court might interpret differently than you intended.
Why It Is Not Only for Marriages
Many people assume prenups apply only to married couples, but agreements can also be made by de facto couples, including same-sex couples. Whatever the relationship, the same principle applies: clarity before a dispute is worth far more than negotiation during one.
Timing matters too. An agreement made before a wedding or before moving in together is usually easier to reach, because the relationship is still strong and both sides are willing to be open. Agreements can also be made during a relationship or after separation, so it is not too late if you have not yet signed one, but the earlier the better.
Choosing the Right Adviser
A family business is not a standard asset, so the agreement should not be a standard template. Working with an experienced prenup lawyer in Sydney helps ensure the document fits your business structure, accounts for trusts and tax implications, and meets the legal requirements that make it enforceable. Good advice at the start can prevent a very expensive argument later.
It is also worth involving your accountant. Valuation, tax consequences and the structure of the business all affect how an agreement should be written, and coordinating early avoids surprises.
The Bottom Line
So, can a prenup protect a family business from a relationship breakdown? In many cases, yes, provided it is drafted carefully, signed properly and kept up to date. It will not remove every risk, but it can give you and your family certainty, reduce conflict and help keep the business you worked hard to build intact.
If you own or plan to inherit a family business, speak with a qualified prenup lawyer in Sydney before you marry, move in together or make major changes to your ownership structure.
