Separation Under One Roof Australia: How to Prove It for Divorce

You don't have to move out to be legally separated in Australia. The Family Law Act 1975 allows couples to live in the same house and still satisfy the 12-month separation requirement for divorce — provided they can prove they were living genuinely separate lives under the same roof.

This isn't a loophole or a grey area. The FCFCOA (Federal Circuit and Family Court of Australia) explicitly recognises separation under one roof as a legitimate form of separation. Financial constraints, childcare logistics, housing availability, or a shared mortgage can all make it impractical for one spouse to move out immediately. The court understands this.

The catch: you need to prove it. And the evidentiary bar is higher than if you'd simply moved to different addresses.

What the Court Looks For

The registrar evaluating your divorce application doesn't care about your reasons for staying in the same house. What matters is evidence that the marital relationship fundamentally changed during the period you claim you were separated. The court looks at six categories of domestic behaviour:

Sleeping arrangements. Separate bedrooms and the cessation of sexual intimacy. If you continued sharing a bed, even occasionally, the court may find the separation wasn't genuine.

Domestic duties. A reduction in shared household tasks — you stopped cooking for each other, doing each other's laundry, or cleaning shared spaces as a unit. Each person managed their own domestic needs.

Financial division. Closing joint bank accounts, opening separate accounts, paying your own bills separately, and splitting household expenses rather than pooling income.

Social presentation. No longer attending events, family gatherings, or social outings as a couple. Informing friends and family that you've separated. If your social circle didn't know you were separated, the court will question whether you genuinely were.

Government notifications. Formal notification to Services Australia or Centrelink of your change in relationship status. If you receive government benefits as a single person, you'll need to attach the department's acknowledgment letter to your affidavit.

Parenting arrangements. If you have children under 18, evidence of independent care arrangements — separate routines, separate decision-making, or one parent taking primary responsibility for school and medical appointments.

You don't need to prove every single category. But the more evidence you can provide across these areas, the stronger your case.

The Affidavit Requirements

If you lived under the same roof for any part of your 12-month separation period, you must file additional affidavits beyond the standard Affidavit for eFiling.

Your own affidavit: A sworn statement detailing the specific ways your domestic arrangement changed during the separation. Don't write vague generalisations — the registrar wants concrete details. "We stopped eating meals together in April 2025" is useful. "We lived separate lives" is not.

A third-party affidavit: An independent person — a family member, friend, neighbour, or coworker — must file a corroborating affidavit confirming they observed the changed dynamics. This person must have direct knowledge: they visited the house and saw separate bedrooms, they noticed the couple arriving separately at events, or one spouse told them about the separation.

In a joint application: Both spouses can file separate affidavits, or one spouse can file an affidavit supported by the third-party corroborating affidavit. The second option is simpler if both parties agree on the separation facts.

All affidavits must be signed in front of a Justice of the Peace or solicitor.

Common Mistakes

Not telling anyone you've separated. If no one in your social circle, family, or workplace knew you were separated, the court has no evidence beyond your own assertion. Start informing people early in the separation — and keep records (texts, emails) that show you did.

Continuing joint financial arrangements. Keeping a joint bank account active and continuing to pool income undermines your claim of separation. Even if closing accounts is impractical, open a separate account and route your own income through it.

Inconsistent government records. If you're claiming Centrelink benefits as a couple while telling the court you're separated, the registrar will notice. Update your government records to reflect your separated status as soon as possible.

Vague affidavits. "We no longer had a relationship" won't satisfy the court. Provide dates, specifics, and observable changes. The affidavit is the centrepiece of your evidence — treat it like a witness statement, not a personal essay.

The Timeline

Your 12-month separation clock starts from the day at least one of you formed the intention to end the marriage and communicated that to the other. Living under the same roof doesn't delay or extend the separation period — the same 12 months and one day applies whether you're in separate houses or separate bedrooms.

After the separation period, you can file for divorce through the Commonwealth Courts Portal like any other applicant. The only difference is the additional affidavit paperwork.

The Queensland Divorce Filing Process Guide includes a dedicated section on separation under one roof, with guidance on structuring both your own affidavit and the third-party corroborating affidavit to meet the court's evidentiary standards.

See more Queensland guides →