If someone has asked you to act as guarantor on their home loan — or you're the buyer hoping a parent or family friend will — the decision comes down to one question: whose asset is on the line if the repayments stop? A guarantor arrangement can make a loan possible that otherwise wouldn't be, but it shifts real risk onto a second household. ASIC's MoneySmart puts it plainly: if you're thinking about going guarantor on a loan, understand the risks first.
This guide explains how the structure works, what each side is exposed to, and the questions worth getting answered in writing before anyone signs.
What a guarantor home loan is
In a standard home loan, the lender has two things to rely on: the borrower's income and the property being bought. If the borrower stops paying and the property sells for less than the debt, the lender wears the shortfall.
In a guarantor arrangement, a third person — MoneySmart notes this is often a friend or family member — offers additional security for the loan. That security is usually equity in a property the guarantor already owns. The guarantor isn't living in the house and typically isn't making the repayments, but their asset sits behind the debt.
Two variables decide how much danger there is, and they should be the first two things you establish:
- What the guarantee covers. Whether it is limited to a set dollar amount, or extends to the whole loan plus costs.
- What secures it. Which asset, and how much of its equity is committed.
Everything else — the interest rate, the repayments, whether the borrower can eventually take the guarantor off the loan — matters, but these two answers determine the size of the loss if things go wrong.
The part people underestimate: it's the guarantor's asset at risk
MoneySmart's worked example is worth reading in full on their site. In it, Mary agrees to go guarantor and uses the family home as security. If the borrower, Leo, still can't repay the loan and Mary can't cover it, the bank may sell the family home to recover the debt.
That is the whole arrangement in one line. A guarantee is not a character reference and not a formality. It gives the lender a claim over the guarantor's property. The borrower's default becomes the guarantor's problem, and the consequence is not a bad credit file — it is a forced sale.
What the guarantor is taking on
- The debt doesn't disappear because you weren't the one borrowing. If the borrower stops paying, the lender can come to you for the repayments.
- Your home can be sold. Following MoneySmart's example, if you can't cover the amount yourself, the lender may move to sell the secured property to recover what's owed.
- The exposure may affect your own plans. A contingent liability like this can reduce what you can borrow later. Ask your lender or broker directly how they treat it.
- Getting out isn't automatic. Whether and when a guarantor can be released from the loan is set by the lender and the documents. Ask what the release conditions actually say, rather than assuming there's a standard answer.
- The relationship carries the strain. Money owed between family members changes family dynamics, and this is the risk people least often plan for.
What the borrower is taking on
- You still owe the whole loan. A guarantor doesn't take over your obligation; the lender simply has someone else to chase.
- Your deposit and repayments still need to work. A guarantee addresses the lender's security position. It doesn't change whether the repayments fit your budget.
- Someone else's home is at risk because of your loan. That is a serious obligation to carry, and it's worth saying out loud before proceeding.
- Refinancing later may be harder than you expect. If the plan is to remove the guarantor in a few years, ask upfront what has to be true for that to happen.
Questions to put to the lender, in writing
| Question | Why it matters |
|---|---|
| Is the guarantee limited to a set amount, or does it cover the full loan and any costs? | Sets the maximum loss. |
| Exactly which asset secures the guarantee, and how much equity is committed? | Identifies what can be sold. |
| What has to happen for the guarantor to be released? | Defines the exit. |
| What happens if the borrower misses a repayment — how soon is the guarantor contacted? | Shows how quickly the risk becomes real. |
| Does the lender require the guarantor to get independent legal advice? | Independent advice protects the guarantor, not the lender. |
| How is the guarantee treated if the guarantor later wants their own loan? | Affects the guarantor's future borrowing. |
Treat any verbal answer as provisional. If it isn't in the documents, it isn't agreed.
A short decision checklist
Before signing, both sides should be able to answer yes to all of these:
- The guarantor has read the loan documents, or had a lawyer read them.
- The guarantor knows the maximum amount they could be asked to pay.
- The guarantor can point to the exact asset at risk.
- The borrower has stress-tested repayments on their own income alone.
- Both parties have discussed what happens if the borrower loses work, separates from a partner, or the property falls in value.
- Both parties know the conditions for removing the guarantor.
If you can't get to yes on any of these, that's the sign to slow down.
Next steps
If you're the borrower, ask the lender to confirm in writing whether a guarantor is actually necessary in your situation, and what changes if you wait and save a larger deposit instead. If you're the potential guarantor, ask for the documents before you give an answer, and budget for independent legal advice that is yours alone.
For the broader borrowing picture — deposit, costs and how lenders assess a loan — start with our home loan guides at /money/home-loans/. If you'd rather see which lenders your situation might fit, /match/ is the place to start.
General information only
This article is general information about how guarantor home loans work in Australia. It isn't legal, financial, credit or tax advice, and it doesn't account for your circumstances. Loan terms, lender policies and the legal effect of a guarantee vary between lenders and states, and source material can change. Confirm every detail with the lender and a qualified adviser before signing anything. Australian Cash is an independent information publisher — we are not a lender, broker, government body or regulator, and we don't represent or rank providers.