When family law and estate planning collide: why good planning in one area can be undone in the other

A carefully prepared estate plan can still come undone if family law risks are ignored. In NSW and across Australia, inheritances, trusts, superannuation and even asset protection steps can all become relevant in family law proceedings.

For families trying to preserve wealth across generations, that means estate planning and family law cannot be treated as separate conversations.

The big idea

Many people assume that if an asset sits in a trust, comes from an inheritance, or is dealt with in a will, it is somehow protected from a future family law dispute. That is often not the case.

The Family Court's powers are broad, and the court looks beyond simple legal ownership. Control of a trust, access to inherited wealth, the structure of superannuation interests, and even arrangements designed to "quarantine" assets can all be examined closely. Binding Financial Agreements (BFA) can be valuable, but they are not bulletproof, and poorly handled agreements can fail when they are needed most.

For estate planning clients, the real issue is not just how wealth passes. It is whether the structure will stand up if a relationship later breaks down.

Who this affects

• Parents and grandparents leaving inheritances to children through wills or testamentary trusts — A family may assume inherited wealth will stay on that side of the family. In reality, how that inheritance is structured, controlled and accessed can matter significantly if family law proceedings arise later.
• Business owners, primary producers and high-net-worth families using trusts and family entities — Where wealth is held through discretionary trusts, companies or layered structures, the key question is often who really controls the asset and how available it is in practical terms.
• Couples entering marriage, remarriage or de facto relationships with existing family wealth — This is particularly relevant where one party brings in an inheritance expectation, family business interests, trust-connected wealth, or substantial superannuation.
• Families using BFAs or asset transfers as protection tools — These arrangements can be useful, but they need to be approached carefully. If the process is flawed, or the structure is too aggressive, the intended protection may not hold.

What to watch for

• Inheritances are not automatically quarantined — An inheritance may still become relevant in a property settlement, either directly or as part of the broader financial picture.
• A trust is not automatically "safe" — In family law, control and practical access can matter more than labels. A discretionary trust may still be exposed if one party effectively controls it.
• Superannuation is part of the wider risk picture — It is often treated as separate in estate planning discussions, but family law can still reach it under its own framework.
• Binding Financial Agreements depend heavily on process — The value of a BFA often turns not just on the drafting, but on timing, disclosure, advice and the circumstances in which it was signed.
• Asset protection steps can create new problems — Transfers or restructures intended to keep assets out of reach can attract scrutiny if they appear designed to defeat a claim.

Common traps

• Assuming a testamentary trust makes inherited wealth family-law proof
• Believing a discretionary trust is protected simply because assets are not held personally
• Treating superannuation as outside the conversation when planning succession
• Relying on a BFA without properly considering enforceability risk
• Moving assets into new structures without considering how the Family Court may view the transaction

What to do next

Review estate plans with family law risk in mind, especially where significant family wealth is involved. Revisit trusts, superannuation arrangements and succession structures to test whether they still achieve the intended outcome and consider whether a BFA or related planning tool forms part of a broader protection strategy.

• Identify whether inheritances, family entities or asset transfers could create future vulnerability
• Speak with professional advisers who can assess estate planning and family law issues together, not in isolation

How The Quinn Group can help

In NSW and across Australia, family wealth planning is no longer just about wills, trusts and tax. It is also about understanding how those structures may be treated if relationships change. At The Quinn Group, we help clients plan with both estate law and family law in mind.

Where inheritances, trusts, superannuation or family entities are involved, we can help you assess whether your current planning is likely to hold up when it matters most — and where the risks may sit before they become expensive disputes.