Guarantor Home Loans: How Family Equity Gets You In Sooner
For most of the first home buyers I talk to, the repayments are not the problem. The deposit is.
A guarantor home loan flips that problem on its head. Instead of saving for years while prices keep moving, a family member (almost always mum and dad) lets the lender use a slice of the equity in their own home as extra security. You can buy with little or no deposit, pay no Lenders Mortgage Insurance, and your parents never hand over a dollar of cash.
Done well, it is one of the most powerful tools in Australian lending. Done badly, it puts the family home on the line. Here is how it works, the real numbers, the risks I make every family sit with before signing, and the exit plan.
What a guarantor home loan actually is
A guarantor loan is a normal home loan with one extra layer: a security guarantee. The guarantor lets the lender register a mortgage over part of their property. That extra security does the job your deposit would have done, dropping your effective loan-to-value ratio (LVR) to 80% or below.
Two things follow. First, no Lenders Mortgage Insurance, which on a 95% loan can run to tens of thousands of dollars. Second, the deposit hurdle largely disappears.
The guarantor does not make your repayments and is not a co-borrower. Your income still has to service the whole loan, so check how much you can actually borrow first. The guarantee solves the security side, never the serviceability side.
The numbers on a real purchase
Say you are buying at $800,000 with $40,000 saved. On your own, that is a 95% loan plus LMI, if a lender takes it at all. With a guarantee, the picture changes completely.
Illustrative example. The guarantee covers only the gap between the buyer's property and the security the lender needs, not the whole loan.
The lender funds the $760,000 loan and stays at 80% LVR because it holds $950,000 of total security: your new home plus a limited guarantee of about $150,000 against your parents' place. Their exposure is capped at that number, not the whole loan.
That word limited is the one I fight for on every guarantor deal. The guarantee gets sized at the minimum the lender needs, so the family's risk is as small and as clearly defined as possible.
Guarantor loan vs the 5% deposit scheme vs saving 20%
Since October 2025 the federal First Home Guarantee has had no income caps and unlimited places, so most first home buyers now have two genuine low-deposit paths. Here is how they stack up.
| Guarantor loan | First Home Guarantee | Saving 20% | |
|---|---|---|---|
| Deposit needed | As low as $0 | 5% minimum | 20% plus costs |
| LMI | None | None | None |
| Price caps | No caps | Caps by suburb (e.g. $1.5M Sydney) | No caps |
| Who else is involved | Family equity on the line | Federal government guarantee | Nobody |
| Best for | Little or no deposit, or buying above scheme caps | First home buyers with 5% saved under the caps | Buyers with time on their side |
Scheme settings as at June 2026. Price caps vary by location.
If you are weighing up the deposit side of this decision, my guides on how much deposit you really need and NSW first home buyer grants cover the schemes in detail.
Who can go guarantor, and what lenders check
Most lenders want the guarantor to be immediate family, usually a parent, with solid equity in an Australian property. The lender values the guarantor's property, checks any existing mortgage on it, and registers a mortgage for the guarantee amount.
Guarantors who are retired or close to it get extra scrutiny, because calling on the guarantee could put their home at risk at exactly the wrong time of life. Most lenders require independent legal advice for the guarantor before signing, and some require financial advice too. I see that as a feature, not a hurdle. Everyone should understand the worst case before they sign for it.
The part most posts skip
The guarantor's risk is real. If the borrower defaults and the sale of their property does not cover the debt, the lender can pursue the guarantor for the shortfall up to the guaranteed amount. In the worst case that can force the sale of the guarantor's home. ASIC's Moneysmart is blunt about this, and so am I.
It can shrink mum and dad's own plans. A guarantee sits against the guarantor's property as a contingent liability and can reduce their borrowing power while it is in place. That matters if they want to refinance, downsize or invest themselves.
The mitigations are simple and non-negotiable. Keep the guarantee limited to the minimum amount, buy with a realistic repayment buffer, insure your income, and agree the exit plan before anyone signs. The guarantee should be a short chapter, not the whole book.
The exit plan: releasing the guarantor
The guarantee is designed to be temporary, but the release is never automatic. You have to ask. The standard path:
1. Get the loan to 80% LVR or below. Repayments chip the balance down while the property value rises. Plenty of buyers get there in three to five years without doing anything special.
2. Order a valuation. If the numbers work, the loan can stand on its own security.
3. Apply for the release. The lender wants clean repayment history, usually six months minimum, then discharges the mortgage over the guarantor's property.
This is also the natural moment to attack the rate. A loan written at 95% pricing can often be repriced or refinanced once you are at 80%, which is a double win. I track this for clients so the release happens at the first realistic opportunity, the same way I treat low-deposit scheme loans.
Book a free strategy call
One short call, no obligation. I will work out whether a guarantor loan, the 5% deposit scheme, or a mix is the cheapest safe path into your first home, and exactly what it means for your family.
Book my free callMatty Teague, Mortgage Broker, Powered by Flint. Credit Representative 573962. Flint Group Pty Ltd ACL 488313.
FAQs
Who can be a guarantor on a home loan?+
Most lenders only accept immediate family, usually parents, and the guarantor needs enough equity in an Australian property to support the guarantee. Some lenders accept grandparents or siblings. The guarantor generally needs to be working or able to demonstrate they could cover the guaranteed amount if called on, and most lenders require them to get independent legal advice before signing.
Does the guarantor hand over any money?+
No. A security guarantor does not give you cash and does not make your repayments. They allow the lender to register a mortgage over part of the equity in their property as extra security. Money only changes hands if you default and the sale of your property does not cover the debt.
How much can I borrow with a guarantor?+
With a strong income position, many lenders will allow you to borrow 100% of the purchase price, and some allow up to about 105% so stamp duty and costs are covered too. Your income still has to service the full loan, the guarantee only solves the deposit side.
Do I still pay Lenders Mortgage Insurance with a guarantor?+
Usually no. The guarantee tops the security up to the point where your effective loan-to-value ratio is 80% or below, which is the level where lenders do not charge LMI. Avoiding LMI can save you many thousands of dollars on a low-deposit purchase.
When can the guarantor be released?+
Once your loan balance is at or below 80% of your property value, you can apply to have the guarantee released. You get there through repayments, capital growth, or both, and the lender will usually want a valuation and around six months of clean repayment history. The release is not automatic, you or your broker have to request it.
Is a guarantor loan better than the 5% deposit First Home Guarantee?+
They solve the same problem differently. The First Home Guarantee needs a 5% deposit and has property price caps, but no family involvement. A guarantor loan can work with little or no deposit and no price cap, but puts family equity on the line. Many buyers qualify for both, so it is worth comparing properly before choosing.
Keep reading
How much deposit do you really need to buy a house?
I structure guarantor loans so the guarantee is limited, the risks are spelled out in plain English for the whole family, and the release date is part of the plan from day one. Free for most home loans.
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