Guarantor home loans in 2026: how family guarantees actually work

10 August 2026 · Guarantor loans · 7 min read

If saving a deposit felt hard a year ago, the numbers moving right now aren't making it obviously easier. Australia's Cotality Home Value Index fell 0.4% month over month in June 2026, marking the steepest monthly decline in three and a half years. Among the major capitals, Sydney and Melbourne recorded the largest declines, with home values falling 1.2% and 1.0%, respectively. Softer prices sound like good news if you're trying to buy, but they cut both ways — a smaller gap to the market doesn't help much if your borrowing power hasn't moved and the bank's serviceability test hasn't budged either. At its most recent meeting the RBA board decided to leave the cash rate target unchanged at 4.35 per cent, and the next decision lands shortly after this article is published, with most commentary pointing to another hold rather than relief on repayments. Cooling prices plus still-restrictive borrowing costs is exactly the environment in which more families end up discussing guarantor loans around the kitchen table.

This is general information, not a recommendation — whether a guarantor structure suits your family depends on your numbers, your relationships and your lender's policy, which is exactly the conversation a broker is there to have with you.

What a guarantor home loan actually is

A guarantor home loan lets a family member — usually a parent — offer some of the equity in their own property as additional security for your loan, rather than handing over cash. The lender takes two mortgages: one over the property you're buying, and a limited one over the guarantor's property, generally capped at whatever amount is needed to bring your loan-to-value ratio down to a level the lender is comfortable with. You remain solely responsible for the debt and the repayments — the guarantor isn't a co-borrower and doesn't gain any ownership share of your home. If things go to plan, the guarantee is usually released once you've built enough equity in the property, commonly once your loan balance falls below around 80% of its value, subject to a fresh valuation and the lender signing off.

Why more families are weighing it up in 2026

The appeal is straightforward: a guarantor arrangement can let you buy with a smaller cash deposit, often while avoiding lenders mortgage insurance altogether, because the lender is treating the combined security as if you'd contributed a full 20% deposit yourself. With borrowing costs still elevated and lenders applying serviceability buffers on top of the actual interest rate, plenty of borrowers can afford the repayments on a loan they simply can't get approved without extra security. That's the gap a guarantor is designed to close — not your income, but the deposit and LVR test that sits in front of it.

What guarantors are actually taking on

The part that gets glossed over in family conversations is what happens if the borrower can't keep up repayments. The guarantor's property is on the line for the guaranteed portion, which can affect their own ability to refinance, sell, or borrow against their home while the guarantee is in place. It also shows up in the guarantor's own credit and liability position when they apply for other finance, even if nothing has gone wrong. And because release from the guarantee isn't automatic — it typically requires an application, a valuation and lender approval — a guarantor can remain exposed for longer than either side expected if property values move against them or repayments fall behind schedule.

Illustrative example: Say a couple is $60,000 short of a 20% deposit on an $800,000 purchase. Instead of the couple paying lenders mortgage insurance on a 90% loan, a parent offers a limited guarantee secured against their own home for that $60,000 shortfall. The couple borrows the full amount needed as if they had a 20% deposit, avoids LMI, and remains solely liable for repayments. The parent's guarantee is intended to reduce over time and be released once the couple's equity — through repayments and any growth in value — brings their own loan back under 80% of the property's value. This is a simplified illustrative scenario only; actual structures, costs and release conditions vary by lender.

Alternatives worth comparing before you commit family equity

A guarantor loan isn't the only way to bridge a deposit gap. The government's low-deposit home loan scheme is one option worth understanding properly — we've covered the latest changes to income caps and available places in our Help to Buy scheme article. Genuine savings plans, LMI itself (which is a cost, not a dealbreaker, for many buyers), and family loans structured as debt rather than security are all worth putting on the table alongside a guarantor arrangement. A broker can run the numbers on each side by side, including what your realistic borrowing power looks like using a borrowing power calculator before anyone signs anything.

If you're weighing this up as a first home buyer, it's worth starting with a broader look at your options through our first home buyer hub, then talking through the guarantor question specifically via our first home buyer page — because the right structure for your family depends on details a general article can't capture.

Common questions

Does a guarantor need to be a parent?
Most lenders prefer an immediate family member, typically a parent, though some will consider other close relatives on a case-by-case basis. Policies differ significantly between lenders.

Can the guarantee be removed later?
Usually, yes — once your loan balance falls to a level the lender is comfortable with relative to the property's value, subject to a new valuation and formal application. It isn't automatic and isn't guaranteed to happen on your preferred timeline.

Is the guarantor responsible for the whole loan?
No — a guarantee is typically limited to a specific dollar amount or percentage, covering the shortfall between your deposit and the lender's standard requirement, not the entire debt.

What happens to the guarantor if property values fall?
A falling market can make it harder to reduce the loan-to-value ratio enough to release the guarantee, potentially extending how long the guarantor's property remains exposed. It's a real risk worth discussing openly before agreeing to the arrangement.

General information only — not credit advice. Credit assistance is provided by a licensed mortgage broker.