Preparing financially
Buying with family — guarantors and co-ownership
Four different family roles — guarantor, co-borrower, co-owner and contributor — plus ownership structure, whole-debt exposure, and what a co-ownership agreement should cover.
- Guarantor, co-borrower, registered co-owner and family contributor are four different roles — financial contribution, loan liability and ownership aren't the same thing.
- Check whether a guarantee is limited or unlimited — don't assume, and don't assume release happens automatically once repayments are made.
- Co-borrowers are commonly jointly and severally liable for the whole debt, not just an agreed private share.
- Joint tenants and tenants in common are legally different ways to hold title, with different consequences on death.
- A written co-ownership agreement, drafted before settlement, is what actually protects everyone — not an informal understanding.
Four different roles — don't treat them as interchangeable
Family involvement in a purchase can mean very different things: a guarantor secures the loan with their own property but isn't on title or the loan as a borrower; a co-borrower is jointly liable for the debt; a registered co-owner holds a legal interest in the property itself; and a family contributor may lend or gift money without being on the loan or title at all. Financial contribution, loan liability and legal ownership are three separate questions — establish which role each person actually has before assuming what it means for them.
Guarantors
A guarantor (often a parent) uses their own property as additional security, which can let a buyer borrow with a smaller deposit or avoid LMI (see the deposit guide). This is a real financial and legal risk to the guarantor, not just a formality — if the borrower can't repay, the guarantor's own property is at risk. Check whether the specific guarantee is limited (to a time period or dollar amount) or unlimited — don't assume it's limited by default. Release generally isn't automatic just because repayments have been made; it typically needs to be formally requested and approved once enough equity exists. A guarantor also doesn't gain an ownership interest in the property simply by guaranteeing the loan — guaranteeing and owning are separate. Being a guarantor can also reduce the guarantor's own future borrowing capacity for as long as the guarantee is in place, since lenders factor in the contingent liability when assessing the guarantor's own later loan applications — and if the borrower does default, the debt can appear on the guarantor's own credit file too. Guarantor arrangements should always involve independent legal advice for the guarantor, separate from the borrower's own advice.
Co-borrowers: whole-debt exposure
Co-borrowers named on a standard loan are commonly jointly and severally liable for the whole debt, not just an agreed share — a private 50/50 arrangement between family members doesn't itself limit what the lender can recover from any one borrower. Verify this in the actual loan documents rather than assuming a private understanding controls it.
Co-ownership: how is title actually held?
Registered co-owners generally hold title as either joint tenants (survivorship generally applies — a deceased owner's interest passes to the surviving owner) or tenants in common (each holds a specified, possibly unequal share, which passes under their will rather than automatically to the co-owner). Exact terminology and registration processes are state and territory matters — see buying a home with a partner for the fuller comparison, which applies equally to non-partner co-ownership.
Before you sign: what a co-ownership agreement should cover
Ownership percentages; deposit and purchase-cost contributions; ongoing repayments and costs; occupation or exclusive-use arrangements if only some owners live there; approval for renovations or major decisions; what happens after a missed payment; how the property would be valued for a buyout; a voluntary sale process and what happens if someone wants to leave but others don't; death, incapacity and estate planning; and how disputes get resolved. A written agreement, drafted before settlement, is what actually protects everyone — not an informal understanding.
Before fixing the ownership and loan structure, check government-support scheme eligibility for every proposed applicant separately — see government support for home buyers — and be aware that duty, land tax, capital gains tax and main-residence consequences can differ depending on who's on title; get tax advice specific to your arrangement rather than assuming a standard outcome.
Practical checklist
Before a family guarantee or co-ownership arrangement
- Establish which of the four roles each family member actually has
- Get independent legal advice for the guarantor, separate from the borrower's advice
- Confirm whether the guarantee is limited or unlimited, and how it's released
- Decide between joint tenants and tenants in common with a conveyancer or solicitor
- Draft a written co-ownership agreement before settlement, not after a disagreement
- Check government-support eligibility separately for every proposed applicant
Questions for a professional
- Is this guarantee limited or unlimited, and exactly what is the guarantor liable for?
- How and when is the guarantee released once the borrower has enough equity?
- Are we jointly and severally liable for the whole debt, or only our agreed shares?
- What should a co-ownership agreement cover for our specific arrangement?