Can My Girlfriend Take Half My House in Australia?

You’ve been together a while now. She’s moved in, you’re splitting the groceries, you’re sharing a Netflix account, and one night around 2am a quiet worry creeps in: if this ends, can she take half my house?

It’s one of the questions I get asked most, so let me give you a clear answer. No legal waffle.

The short answer is yes, she can, but not always. It comes down to one thing first: whether the two of you are in what the law calls a de facto relationship. Under the Family Law Act, if you’re de facto, your property can be divided when you separate in much the same way it would be for a married couple. That catches a lot of people off guard, so let’s start there.

First question: are you actually ‘de facto’?

Here’s where a lot of people get caught out. They assume there’s a switch, that you only become de facto once you’ve lived together for two years. Two years is part of the picture. It isn’t the whole story.

The law doesn’t just count the calendar. It looks at how you actually lived. Among the things it weighs up:

• How long you’ve been together, and how much of that time you lived under one roof
• Whether you have a child together
• Whether one of you contributed money or work, like paying the mortgage or renovating the place
• Whether your finances are tangled together, such as shared accounts and shared bills
• How the two of you present to the outside world

Do you act like a couple in public? Do you have shared bank accounts? Do you go on holidays together? How does the world perceive you? It’s not just about living together for two years, which is a common misconception. It’s about how you lived.

Reach that threshold and, as far as your property is concerned, the whole thing is on the table.

De facto relationships are defined in section 4AA of the Family Law Act 1975. Before a court can divide property, you generally need to have been together at least two years, have a child together, have made substantial contributions, or have registered your relationship (section 90SB).

‘Half’ is the biggest myth of all

Being de facto does not mean your girlfriend automatically walks away with half your house. This is the myth I spend the most time correcting.

It’s a big myth that people fall into: if you have a claim, then automatically you’re entitled to half. No, it just means that they’re able to get a ticket to the entrance of the courtroom.

Having a claim gets her in the door. It does not hand her fifty per cent. The court doesn’t grab a calculator, hit divide by two and call it a day. Once you’re through that door, it works through two things: what each of you contributed, and what each of you will need going forward.

Contributions run both ways. There’s the financial side, like the deposit, the mortgage and the renovations, and the non-financial side, like homemaking and raising children. Then the court looks at future needs, things like a gap in earning capacity, who is caring for any children, and health or medical costs down the track. Only then does it land on what a fair division looks like.

And that division of property moves. Sometimes it’s 50-50, sometimes 60-40, sometimes 70-30. There is no magic number. It turns on the facts in front of the court. For de facto couples, the power to actually adjust who owns what comes from section 90SM of the Family Law Act.

A real example: Ben and Lisa

Let me tell you about a couple we acted for. Names changed, of course. Call them Ben and Lisa.

Ben owned his house before Lisa moved in. The title was one hundred per cent in his name. They lived together for five years, and during that time Lisa paid him $500 a week, which Ben always thought of as rent, roughly what she would have paid to rent somewhere similar. They split the groceries. They both pitched in around the house.

Five years in, they separated, and Lisa said she wanted half the house.

The matter did proceed and eventually settled. But the agreement they came to was that she got a small percentage of the house’s value, definitely not half, because what we looked at was Ben’s initial contribution, which was huge. Lisa did make financial contributions, despite the payments being considered rent, but they were nowhere near enough to justify a 50-50 split.

Here’s the part worth sitting with. Calling those payments ‘rent’ did not shut the door. Lisa had still made contributions, and the label she and Ben put on them didn’t erase that. But Ben’s initial contribution was so large that her payments were nowhere near enough to justify an equal split. She walked away with a small percentage. Ben kept the lion’s share.

Two lessons in one story. A label like ‘rent’ won’t protect you on its own, and a big head-start contribution genuinely counts.

The clock is ticking: the two-year deadline

One more thing people miss, and it cuts both ways. If you’ve separated from a de facto partner, there’s a deadline to bring a property claim: two years from the date the relationship broke down. Miss it and you generally need the court’s permission to proceed at all, which you can’t count on. That limit sits in section 44 of the Family Law Act. So whether you’re the one worried about a claim or the one thinking about making one, don’t sit on it.

So what do you actually do about it?

If any of this is keeping you up at night, there are three practical moves.

1. Get a binding financial agreement. This is the closest thing Australia has to a prenup: a legal contract that sets out who gets what if things end. It isn’t cheap, you’ll each need your own lawyer, and a properly drafted one usually costs between $5,000 and $10,000. Set against the value of a house, that’s cheap insurance.
2. Keep clear records of what you put in. Mortgage payments, renovations, bills, the deposit. The more proof you have, the easier it is to show what you contributed if it ever comes to it.
3. Get advice early. Don’t wait until it’s all gone pear-shaped. The protections that work best are the ones you put in place before there’s a problem, not after.

And keep this in mind: even if you bought the house before you met her, she may still be entitled to a percentage. Even if you were together only a short time, the same can be true. That’s exactly why doing nothing is the riskiest option of all.

The bottom line

Can your girlfriend take half your house? Sometimes yes, sometimes no. It depends on whether you’re de facto, what each of you contributed, and what each of you needs going forward. What it almost never is, is an automatic 50-50.

Don’t leave it to chance. If you’re in a serious relationship and you want to protect what you’ve worked hard for, that isn’t being unromantic. It’s being smart.

If you’d like to talk it through, reach out to me and my team. Book a free discovery call on 1300 614 732 or send us a message, and we’ll walk you through where you actually stand. No pressure, no judgment, just clear advice.

Protect your assets. Protect your peace.