The house is usually the biggest asset, the most emotionally loaded decision, and the one most people handle worst. Not because they're careless — because there's genuine pressure to decide quickly, a lot of bad informal advice flying around, and a situation that's inherently uncomfortable to sit in for very long.
This article won't tell you what to decide. It will tell you what your options actually are, what each one costs, what the legal mechanics look like, and what most people get wrong.
The three options, plainly stated
When a couple separates and there's a jointly owned property, there are three paths.
One person buys the other out. The buyout person refinances the mortgage in their own name, pays the departing partner their share of the equity, and takes full ownership. This is the cleanest outcome if the buyout person can qualify for the loan alone.
The property is sold and proceeds are split. Both parties agree to sell, the mortgage is discharged, and the net proceeds — after agent fees, discharge fees, and any capital gains — are divided according to the agreed or court-ordered split.
Both parties retain joint ownership temporarily. Sometimes called a deferred sale arrangement or a "nesting" setup. Neither party forces a sale immediately — often because one party (usually the primary carer) continues living in the home until the children finish school, or until the market improves, or until a refinance becomes possible. This sounds practical. In most cases it creates ongoing problems unless the arrangement is precisely documented and time-limited.
There is no automatic rule about which path applies to you. If you cannot agree, the Family Court can order a sale. It cannot force one party to buy the other out — a court cannot compel someone to take on a mortgage.
Before you decide whether to buy out, sell, or defer, put the housing numbers into Atlas Finances tool and test what each option does to your month.
The buyout calculation
If one party is buying the other out, the equity split drives everything.
Equity is the current market value of the property minus the outstanding mortgage balance and any sale costs you'd incur. That last part matters. If the house is worth $900,000 and the mortgage is $500,000, you don't have $400,000 in equity available for a buyout — you have $400,000 minus the stamp duty on the property transfer, legal costs, and any other adjustments the settlement includes. Get a real number, not a theoretical one.
The party buying out will need to refinance the mortgage in their sole name. This means qualifying under current serviceability rules, on a single income, at the current interest rate. Many people find out mid-negotiation that this isn't possible — the bank won't lend to them solo at the amount required. Find out before you negotiate the split, not after.
Some lenders allow a guarantor. Some will accept a longer loan term to improve serviceability. Talk to a mortgage broker before you make any commitments — not after. An experienced broker can run serviceability scenarios quickly and tell you what's achievable.
Stamp duty and transfer costs
In most Australian states, a property transfer between separating spouses or de facto partners is exempt from stamp duty — but only when the transfer is made under a formal family law property settlement, either by consent order through the Family Court or a binding financial agreement.
A handshake deal does not qualify. An informal email agreement does not qualify. The exemption is conditional on the transfer being formalised properly. If you transfer the property without the right legal structure, full stamp duty applies — and on a $900,000 property in a major city, that's a significant figure.
Each state has slightly different rules and exemptions. Get specific advice for your jurisdiction before any transfer is executed.
The deferred sale: when it works and when it doesn't
The deferred sale is appealing when the alternative is forcing children to move during an already-disruptive period, or when the party living in the home genuinely cannot rehouse themselves immediately. Sometimes it's the right call.
It creates ongoing shared ownership between two people who are no longer in a relationship. That requires:
A clearly documented agreement covering who pays the mortgage, who pays rates and insurance, who is responsible for maintenance and at what threshold, what happens if the property needs major work, what happens if one party wants out before the agreed end date, and what the trigger date or event for the sale is.
Without all of that in writing — properly documented in a consent order or binding agreement — one of two things usually happens. Either one party stops paying their share and the other has to chase it, or the arrangement becomes a permanent limbo that neither party can move on from cleanly.
If you're considering this path: write down every scenario you can imagine going wrong. If the written agreement doesn't have an answer for each one, it's not ready to sign.
What "market value" actually means
When a property settlement depends on the value of the home, both parties need to agree on what it's worth. There are three ways this happens.
A licensed valuer is engaged — either jointly or one per side — and produces a formal valuation. This is the most defensible number and the one the court relies on if you can't agree.
Both parties accept an agent's appraisal. Less formal, faster, cheaper, less defensible. Fine for simple situations where trust is intact.
Both parties agree on a number between themselves, often anchored to recent comparable sales. This works only if there's genuine goodwill and neither party later claims the number was wrong.
If there is any possibility the property value will be contested — or if the gap between what each party thinks the house is worth is more than $50,000 — get a formal valuation. The cost is usually a few hundred to a thousand dollars. That is nothing against the cost of litigating a disputed value.
The twelve-month window you should know about
For de facto couples in most Australian states and territories, property settlement claims must generally be made within two years of the end of the relationship. For married couples, claims must generally be made within twelve months of a divorce order being finalised.
These are limitation periods. Once they expire, you typically need leave of the court to bring a claim — and there's no guarantee you'll get it.
This is why informal "we'll sort it later" arrangements are risky. Every month you wait is a month off the clock. If you separate and nothing is formally documented, and three years later one party wants to revisit the property split, they may find the window has closed.
Get the property settlement formalised within twelve months of separation. If you need more time, document clearly what the arrangement is in the interim.
What most people get wrong
They let the house drive the whole settlement.
The home is visible, tangible, emotionally loaded. People fight hard for it and make concessions elsewhere to get it — often without calculating whether those concessions make financial sense. Super is traded for bricks. A larger cash share is surrendered. A lopsided split of liabilities is accepted.
Before you decide you need to keep the house, calculate the full cost: the refinance amount, the single-income serviceability, the maintenance and running costs, the opportunity cost of the equity tied up in it. Then compare that to the alternative.
Sometimes keeping the house is the right call. Often it isn't — and the realisation comes eighteen months later when the mortgage is straining a single income and the equity is locked in an asset you can't access.
Decide with numbers, not feelings.
For the broader legal framework, read the property settlement guide next.
Practical next steps
Get a formal property valuation before any negotiation begins.
Talk to a mortgage broker about what you can borrow solo before you commit to a buyout.
Check the stamp duty exemption requirements in your state before any transfer.
Use a family lawyer to formalise any agreement — consent orders through the Family Court are the standard mechanism and they're more affordable than most people think.
Don't let an informal arrangement run past twelve months without formalising it.
Sources and further reading
- Australian Institute of Family Studies — property settlement overview: aifs.gov.au
- Family Court of Australia — property and financial matters: fcfcoa.gov.au
- State Revenue Office — stamp duty exemptions (varies by state; search your state revenue office for "family law transfer exemption")
- MoneySmart — property and separation: moneysmart.gov.au
