Guarantor Home Loans in Australia: How Parents Can Help You Buy a Home in 2026

How Does a Guarantor Home Loan Work in Australia?

A guarantor home loan splits the borrowing into two portions. The first portion — typically up to 80% of the property value — is secured solely against the property being purchased. The second portion — the remaining amount above 80% LVR — is secured against both the purchased property and the guarantor's property. The guarantor does not give the borrower money. Instead, they provide a 'limited guarantee' — pledging a portion of the equity in their own property as additional security for the loan.

Example: You want to buy a property for $700,000 with $35,000 savings (5% deposit). Without a guarantor, you would borrow $665,000 at 95% LVR and pay approximately $25,000 in LMI. With a guarantor, the loan is structured as: Loan A — $560,000 (80% of $700,000), secured against the purchased property only. Loan B — $105,000 (the remaining 15%), secured against both the purchased property and the guarantor's property. No LMI is payable because each portion is at or below 80% LVR relative to the security backing it.

The guarantor's property is typically used to guarantee an amount equal to 20–25% of the purchase price — enough to eliminate LMI and cover any shortfall. The guarantee amount is a limited portion of their equity, not the full value of their home. Most lenders require the guarantor to have sufficient equity so that the guaranteed amount plus their own mortgage (if any) does not exceed 80% of their property's value.

Who can be a guarantor? Most lenders restrict guarantors to immediate family members — parents, siblings, grandparents. Some lenders accept de facto partners' parents or step-parents. Friends, colleagues, and unrelated parties are generally not accepted. The guarantor must own property in Australia (some lenders require it to be their principal residence) and have sufficient equity.

What Are the Risks for the Guarantor?

The guarantor takes on real financial risk. If the borrower cannot make repayments and the property is sold for less than the outstanding loan balance, the guarantor may be required to cover the shortfall — up to the guaranteed amount. In a worst-case scenario, the guarantor could be forced to sell their own property or take out a loan to cover the guarantee.

Specific risks include:

Property market decline: If the purchased property falls in value and the borrower defaults, the shortfall increases. The guarantor's exposure is capped at the guarantee amount, but they may still face a significant liability.

Borrower financial stress: Job loss, illness, relationship breakdown, or other financial difficulties affecting the borrower become the guarantor's problem if repayments are missed.

Impact on the guarantor's own borrowing capacity: While the guarantee is in place, lenders treat it as a liability on the guarantor's balance sheet. This reduces the guarantor's ability to borrow for their own purposes — refinancing, purchasing another property, or accessing equity.

Relationship strain: Money and family are a well-known source of conflict. If the borrower struggles financially, the guarantee can create tension and resentment.

Legal requirement: Lenders require the guarantor to obtain independent legal advice before signing. The solicitor must explain the guarantee terms, risks, and the guarantor's obligations. This is a legal requirement — not optional — and protects both parties.

• ✓Guarantor may be liable for up to the guaranteed amount if borrower defaults
• ✓Guarantee reduces the guarantor's own borrowing capacity
• ✓Property market decline increases the guarantor's exposure
• ✓Independent legal advice is mandatory before signing
• ✓Guarantee remains in place until formally released by the lender
• ✓Guarantor cannot unilaterally withdraw from the guarantee

How Do You Remove the Guarantee? (Guarantee Release Process)

The guarantee can be released once the borrower has built sufficient equity in the purchased property — typically when the loan balance falls below 80% of the property's current value. This can happen through a combination of: property value appreciation, the borrower making regular repayments (reducing the loan balance), or the borrower making additional repayments or lump sums.

To release the guarantee, the borrower (or their broker) requests a guarantee release from the lender. The lender will commission a valuation of the purchased property. If the current LVR (loan balance vs property value) is at or below 80%, the lender will release the guarantee — removing the guarantor's property as security and their obligation.

Example: You purchased for $700,000 with a $665,000 loan. After three years, you have paid the loan down to $630,000, and the property has appreciated to $800,000. Current LVR: $630,000 ÷ $800,000 = 78.75%. The LVR is below 80%, so the guarantee can be released.

If the LVR is still above 80%, options include: making additional repayments to reduce the balance, waiting for further property appreciation, or paying LMI on the portion above 80% to release the guarantee.

Timeline: Most guarantees are released within 2–5 years, depending on property growth and repayment speed. The release process typically takes 2–4 weeks once the valuation confirms sufficient equity.