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Australian LawPublished: 19 June 2026by CoParentOS Editorial Team
Last legally reviewed: 19 June 2026Reviewed by: Pending legal reviewJurisdiction: Australia

The Complete Guide to Financial Disclosure in Australian Family Law

Everything separated parents need to know about the duty of disclosure — what you must provide, common mistakes, and the consequences of getting it wrong.

financial disclosureduty of disclosureproperty settlementForm 13hidden assets

The Complete Guide to Financial Disclosure in Australian Family Law

If there's one thing that derails family law matters more than any other, it's financial disclosure done badly — or not done at all. The duty of disclosure is absolute, ongoing, and applies to every party in a family law property settlement. Here's what you need to know.

What the Duty of Disclosure Requires

Under the Federal Circuit and Family Court of Australia Rules, each party must provide full and frank disclosure of their financial circumstances. This means giving the other party — and the court — a complete picture of your income, assets, liabilities, superannuation, and financial resources.

This is not optional. It is not negotiable. And it is not a one-time exercise.

What You Must Provide

At minimum, you'll need to complete a Form 13 Financial Statement — a comprehensive document covering:

  • Your income from all sources (employment, business, investments, government benefits)
  • All assets in your name or control (property, vehicles, bank accounts, shares, trusts, inheritances)
  • All liabilities (mortgages, loans, credit cards, tax debts)
  • Superannuation interests
  • Disposals of property in the preceding 12 months (or longer, if the court suspects an attempt to defeat a claim)

Supporting documents include bank statements, tax returns, payslips, superannuation statements, trust deeds, business financials, and valuations — going back at least three years, and often longer.

The Ongoing Obligation

Disclosure is not something you do once and tick off the list. The duty is ongoing — meaning if your circumstances change materially (you change jobs, receive an inheritance, sell an asset), you must update the other party. Failing to do so can unravel an entire settlement, even years after it was finalised.

Consequences of Non-Disclosure

Courts take disclosure breaches seriously. Consequences include:

  • The court drawing adverse inferences against you
  • Costs orders — you pay the other party's legal fees
  • The settlement being set aside on the basis of fraud or material non-disclosure
  • In extreme cases, referral for criminal prosecution

There is a well-known line of authority in Australian family law: "The duty of disclosure is a fundamental rule. Those who do not comply do so at their peril."

Common Mistakes

The most frequent errors parents make:

  • Failing to disclose a new partner's financial contributions to the household
  • Undervaluing business interests or claiming the business "isn't worth anything"
  • Forgetting about overseas assets or inheritances held in trust
  • Disposing of assets in the lead-up to separation without disclosing it
  • Assuming the other parent doesn't need to know about an asset "they had nothing to do with"

How Long It Takes

Preparing full disclosure typically takes four to eight weeks, depending on the complexity of your financial affairs — longer if you have business interests, trusts, or multiple properties. Starting early and staying organised saves thousands in legal fees.

A platform that keeps your financial records organised and accessible means disclosure is a download, not a scavenger hunt through old emails. CoParentOS helps you store, tag, and export every relevant document — so when your lawyer asks for "everything," you actually have it.

Disclaimer: This article provides general information only and is not legal advice. Laws and procedures vary by jurisdiction and change over time. Consult a qualified family lawyer for advice specific to your situation. For urgent safety concerns, call 000. For confidential family violence support, call 1800RESPECT (1800 737 732).

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