People expect a clean answer to this and there is not one. There is no register you are added to, no anniversary that converts a relationship, and no ceremony that marks the change.
What there is instead is a test applied to the facts, and a set of gateways you must pass before a court will divide property. Both are worth understanding before you need them.
How a de facto relationship is defined
The operative phrase is living together on a genuine domestic basis, and it is deliberately broad. A court assesses the circumstances as a whole rather than ticking boxes.
What gets weighed
The length of the relationship. Whether you lived together and on what basis. Whether there was a sexual relationship. How your finances were arranged, including any shared property and mutual financial support. Whether you owned or acquired property together. Your mutual commitment to a shared life. Whether the relationship was registered. The care and support of any children. And how the relationship was presented publicly.
No single item is decisive. Couples who keep entirely separate finances can still be de facto, and couples who share a mortgage are not automatically so.
The four gateways to a property claim
This is where the practical answer lives, and it is more structured than the definition.
Since 1 March 2009, parties to an eligible de facto relationship which has broken down can apply to the Court to have financial matters determined in the same way as married couples. Before the Court can determine the dispute, you must satisfy it that you were in a genuine de facto relationship which has broken down, that you meet one of four gateway criteria, that you have a geographical connection to a participating jurisdiction, and that the relationship broke down after 1 March 2009.
| Gateway | What it means |
|---|---|
| Two years | The period of the de facto relationship is at least two years |
| A child | There is a child of the de facto relationship |
| Registration | The relationship is or was registered under a prescribed State or Territory law |
| Serious injustice | Significant contributions were made and failure to make an order would result in serious injustice |
You need only one of them. The fourth is the safety valve, and it matters for shorter relationships where one person contributed substantially, for example by funding renovations on a home in the other person’s name.
The deadline that catches people out
If you take one thing from this, make it this one, because it is unforgiving.
You must apply for de facto financial orders within two years of the breakdown of your relationship. After this time you need the Court’s permission to apply.
Two years sounds generous and disappears quickly, particularly when people are trying to stay amicable and avoid lawyers. Permission to apply out of time is not automatic and should never be assumed.
Limitation periods apply to most financial and property proceedings, and the date of separation is what starts the clock. If separation itself is disputed, that becomes a live issue.
How property is actually divided
The same framework applies as for married couples, which surprises people who assume de facto partners get less.
In broad terms the court identifies and values the asset pool including superannuation, considers each party’s contributions both financial and non-financial, considers future needs including care of children, earning capacity, age and health, and then asks whether the overall outcome is just and equitable.
Non-financial contributions carry real weight. Homemaking and parenting are contributions, not favours, and a partner who stayed home is not starting from zero.
Our page on property settlements sets out the process, and valuations in family law property disputes covers how the pool gets valued when parties disagree.
Disclosure is not optional
Worth saying plainly, because it is where matters most often go wrong.
Both parties have a duty to disclose their financial circumstances fully and honestly. That covers income, property, superannuation, interests in companies and trusts, and disposals of property. It is ongoing rather than a one-off.
Non-disclosure tends to be discovered, and the consequences are serious. Our page on financial disclosure obligations explains what is required and what happens when it is not met.
The Australian Government’s family relationships service has general guidance on money and property after separation if you want an overview first.
Children are treated the same way
A point that reassures many parents.
The Court deals with issues relating to the children of de facto relationships in the same way as the children of married couples. There is no lesser status and no separate test.
Parenting arrangements turn on what promotes the safety of the child and each person who cares for them, including safety from family violence, abuse, neglect or other harm, along with the child’s views and needs. Marital status simply does not enter into it.
Evidence that the relationship existed
Where a former partner disputes the relationship, this becomes the whole case.
- Joint financial records. Accounts, loans, insurance, bills in both names.
- Property documents. Leases, mortgages, contributions to a deposit.
- Correspondence. Messages showing a shared life and plans.
- Statements from people who knew you. Family, friends, neighbours and colleagues.
- Official records. Centrelink, Medicare, electoral roll, superannuation nominations.
- Photographs and social history. Holidays, family events, shared milestones.
A relationship register entry, where available, removes most of this argument at a stroke. General information on separation is available from the Australian Government, and registration requirements vary by State.
Key points
- A de facto relationship is defined in section 4AA of the Family Law Act.
- The test is living together as a couple on a genuine domestic basis.
- There is no single moment or anniversary that creates one.
- Courts weigh the whole picture rather than one factor.
- Separate finances do not prevent a relationship being de facto.
- De facto financial claims have been available since 1 March 2009.
- You must meet one of four gateway criteria.
- Those are two years, a child, registration, or serious injustice.
- The serious injustice gateway helps shorter relationships with real contributions.
- You must apply within two years of the breakdown.
- After that you need the Court’s permission, which is not automatic.
- Property is divided using the same framework as for married couples.
- Non-financial contributions such as homemaking carry real weight.
- Full and ongoing financial disclosure is required of both parties.
- Children of de facto relationships are treated identically.
This is general information and not legal advice. Whether your relationship meets the definition, and which gateway applies, depends on your particular facts. If you have separated or think you may, get advice early, because the two year limit is the one deadline that cannot be argued away.