First Home Buyers · May 2026
Guarantor Home Loans — How Parents Can Help You Buy Sooner
A guarantor arrangement can eliminate LMI and let you buy with a 5% deposit using your parents' property equity as additional security — without them contributing cash. Here's exactly how it works, what it costs, and when it makes sense.
What Is a Guarantor Home Loan?
A guarantor loan is where a third party — almost always a parent — uses equity in their own property as additional security for your loan. This allows you to borrow more than your deposit alone would otherwise support, avoiding Lenders Mortgage Insurance (LMI) or buying sooner than you otherwise could.
The guarantor doesn't contribute cash. They're offering their property as collateral — effectively saying "if my child can't repay, the lender can recover from my property too."
How the Numbers Work
A standard example: you want to buy a $900,000 home in Sydney and have a $45,000 deposit (5%). Without a guarantor, on a 95% LVR you'd pay LMI of approximately $25,000–$35,000 capitalised into the loan.
With a guarantor: your parents guarantee a "top-up" portion of roughly $135,000 (to bring your effective LVR to 80%), secured against their home. Your primary loan is $855,000 against your purchase (95% LVR), but the guarantor's security covers the excess above 80%, so no LMI applies.
The guarantee is usually limited to a specific dollar amount — not the entire loan. Once you've built enough equity (typically 80% LVR), you can release the guarantee, and the parents' property is no longer at risk.
Types of Guarantees
Security guarantee (most common): Parent uses their property equity as additional security. They have no obligation to make repayments — the guarantee only activates if you default and the lender can't recover from your property alone.
Servicing (income) guarantee: Less common. Parent's income is included in the serviceability assessment, which helps if the buyer's income alone isn't sufficient. This is a stronger guarantee and involves more risk for the parent.
Requirements for the Guarantor
The guarantor's property must have sufficient equity. Lenders typically require the combined LVR (buyer's loan + guarantee amount secured against parent's property) to remain below 80% of the parent's property value.
Lenders also assess the guarantor's overall financial position, including their own mortgage obligations, income, and age (many lenders have maximum guarantor age policies around 65–75, or require the guarantee to be released before retirement). Guarantors must receive independent legal advice before signing.
The Real Risks — For Both Parties
For the guarantor: In a worst-case default scenario — if the property is sold and doesn't cover the loan, and if the buyer has no other assets to recover from — the lender can pursue the guarantor's property. In practice this is rare, but it's not hypothetical. Parents should treat this as a genuine financial obligation, not a formality.
For the buyer: You still need to service the full loan on your own income. A guarantor reduces the deposit barrier; it doesn't reduce the monthly repayment. If you're at the edge of serviceability, the risk is yours — the guarantor's exposure is secondary.
Releasing the Guarantee
Once the loan-to-value ratio drops below 80% — through repayments, capital growth, or a combination — you can formally apply to release the guarantee. This involves a new property valuation and a formal discharge from the lender. Most borrowers achieve this within 3–7 years.
We always include a release plan in any guarantor arrangement we structure — so parents know from day one when they're likely to be free and clear.
Is It the Right Move?
A guarantor arrangement makes sense when: you have stable income sufficient to service the full loan; you have a reasonable deposit (5–10%) but want to avoid LMI; your parents have substantial equity and genuinely understand the risk they're taking on; and you have a clear path to releasing the guarantee within a reasonable timeframe.
It's not appropriate when the buyer's serviceability is marginal, when the parents' equity is their primary retirement asset, or when there's no realistic path to releasing the guarantee. We'll tell you honestly which situation you're in.
About the Author
William Zhu
Director, Bridge Finance. 8 years of mortgage broking + 5 years in construction. $600M+ settled. Access to 70+ lenders. MFAA member.
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© 2026 Bridge.Finance Pty Ltd ATF Zhu Family Trust. Credit Representative 567817 of Australian Credit Licence 384704. MFAA Member. AFCA Member.
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