What is a guarantor home loan?

Part of the Everstone mortgage glossary · Reviewed June 2026

How a guarantor loan works

The lender takes two securities: the home you're buying, and a limited guarantee over a slice of the guarantor's property — typically the 20% deposit gap plus costs. Because the combined security covers more than the loan, your effective LVR drops to 80% or below and LMI disappears, even with a 5% deposit or none at all.

The word limited is doing the heavy lifting. A properly structured guarantee caps the guarantor's exposure at the guaranteed amount — they are not signing up for your whole mortgage. Lenders will require the guarantor to get independent legal advice (and often financial advice) before signing, which is a feature, not a hurdle.

Releasing the guarantor

The guarantee isn't forever. Once your loan balance falls to about 80% of your property's value — through repayments, capital growth, or both — you apply to release the guarantee and the guarantor's property is fully unencumbered again. Many families achieve release within three to five years; an annual valuation check keeps the exit date honest.

The risks, stated plainly

• If you default and the sale of your home falls short, the guarantor is liable up to the guaranteed amount — in the worst case their own home secures that debt.
• The guarantee can limit the guarantor's own borrowing or refinancing while it's in place.
• Family dynamics are real: agree the exit plan, in writing, before anyone signs.

Common questions about guarantor loans

Who can be a guarantor?

Most lenders accept parents and, with more conditions, other immediate family. The guarantor needs sufficient equity in an acceptable property; retired guarantors are possible at some lenders but face extra scrutiny.

Does the guarantor's income matter?

For a security guarantee the equity is the point — most lenders don't assess the guarantor's income for servicing, though policies differ and some structures do.

When can the guarantor be released?

Usually once your standalone LVR reaches about 80%. It's a formal application with a valuation — it doesn't happen automatically, so diarise it.

Related terms: LMI · LVR · Full glossary

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