Model a guarantor home loan structure for an Australian first home buyer, including the amount of equity a parent or family member would need to put up as security, an estimated timeline for releasing the guarantee, and a three-way cost comparison between using a guarantor, paying LMI, or using the First Home Guarantee.
What is a guarantor loan?
A parent or close family member uses equity in their own home as additional security for your mortgage. The lender treats that pledged equity like extra deposit, which pushes your effective security LVR below 80% and waives LMI. The guarantor does not transfer cash - a legal charge is placed on their title.
Who can be a guarantor?
Most lenders accept parents, step-parents, and in some cases grandparents or siblings. The guarantor must have enough usable equity in an Australian property, meet the lender's serviceability tests, and obtain independent legal advice. Family gifts and third-party loans are usually not allowed.
What is a limited guarantee?
A limited (or 'specific') guarantee caps the guarantor's exposure to a fixed dollar amount - usually the portion of your loan above 80% LVR. This is the standard structure with the big 4 banks. A full guarantee (unlimited) is rare and much riskier.
When can the guarantor be released?
Once your loan balance drops below 80% of your home's value, you can ask the lender to release the guarantee. This usually requires a new valuation and a formal application. Faster ways to hit release: extra repayments, property growth, or refinancing once your LVR is safe.
What happens if I default?
The lender pursues you first - they sell your home to recover the debt. Only if the sale does not cover the outstanding balance does the guarantor become liable, up to the pledged amount. In a worst case, the lender may force the guarantor to refinance or sell their own home to cover the shortfall.
Does the guarantor pay stamp duty on the pledge?
No - a guarantee does not transfer ownership, so no stamp duty applies on the pledge itself. However, if the guarantor is later forced to take over the debt, it could trigger refinancing and other costs. Independent legal advice is required by every major lender.
How does this affect my parent's future borrowing?
While the guarantee is in place, your parent's effective LVR on their home includes the pledged amount. This can limit their ability to refinance, release equity, or take on new debt. They are essentially 'using' part of their borrowing capacity to back you.
Is the First Home Guarantee a better option?
Sometimes. The 5% Deposit Scheme (FHBG) waives LMI without putting a parent at risk. Since October 2025 the scheme has unlimited places and no income caps, eligibility is price-cap + first-home rules only (caps vary by state and region). If eligible, FHBG is usually the cleaner path. If the purchase price is above your state/region cap, a parental guarantee may be the only way.
Does a guarantor loan forfeit the FHOG or stamp duty concession?
No - if the loan is structured as a true guarantee (parent is NOT on the title), you remain the sole owner-occupier. You keep access to the First Home Owner Grant and any first-home stamp duty concession in your state. If the parent is added as a co-borrower or co-purchaser, it's a different structure and FHB benefits are usually lost.