How much LMI is saved with a guarantor loan?

LMI savings depend on loan amount and LVR. A 90% LVR loan of $675,000 incurs approximately $13,500 in LMI. A 95% LVR loan of $712,500 incurs approximately $25,000. With a guarantor bringing effective LVR to 80%, these premiums are entirely avoided. On a $750,000 property with a 5% deposit, savings can exceed $24,000.

When is the guarantee released?

The guarantee is released when the buyer's LVR reaches 80% through repayments or property appreciation. The buyer must request a bank valuation (approximately $300–$400) to confirm this. If confirmed, the lender discharges the mortgage on the guarantor's property. This typically takes 2–5 years and does not happen automatically — the buyer must proactively apply.

Australian Guarantor Loan Calculator

Calculate the guarantee amount needed to avoid Lenders Mortgage Insurance on an Australian family guarantee loan. Shows LMI saved, guarantor equity required, how the two-loan structure works, risk to the guarantor, limited guarantee strategy to cap exposure, and the timeline to release the guarantee when the buyer reaches 80% LVR.

Property Price

Buyer's Deposit

Guarantor Property Value

Guarantor's Existing Mortgage

Interest Rate

Loan Term (years)

LMI Saved with Guarantor

A$24,500

Buyer LVR: 93.3% — Guarantee needed to reach 80% LVR: A$100,000

Buyer's Loan

A$700,000

Monthly Payment

A$4,310/mo

Guarantor Equity Used

A$100,000

Guarantor Has Enough Equity

Yes

Advanced

How Guarantor Loans Work

Two-loan structure, guarantee amount calculation, release timeline

An Australian family guarantee (guarantor loan) allows a buyer to purchase a property with a small deposit while avoiding Lenders Mortgage Insurance (LMI). The guarantor — typically a parent — provides their home equity as additional security for the buyer's loan.

Buyer has less than 20% deposit

The buyer has A$50,000 (6.7% of the A$750,000 property). Without a guarantor, LMI of approximately A$24,500 would be required.

Guarantor provides equity as security

The guarantor's property (worth A$800,000) is registered as additional security for the buyer's loan. The guarantor does not give money — they provide equity as a guarantee only.

Lender treats loan as 80% LVR effectively

With the guarantee in place, the lender has additional security covering the gap between the buyer's deposit and 20%. The buyer gets a loan without LMI despite a low deposit.

Two separate loans — one property, one guarantee

The buyer has their own mortgage. The guarantor's property has a separate mortgage registered against it for the guaranteed amount only (not the full loan). When the buyer reaches 80% LVR, the guarantee is released and the charge on the guarantor's property is removed.

Pro

Risk Analysis, Limited Guarantee & Exit Strategy

Default risk to guarantor, limiting exposure, refinance timeline

Being a guarantor is a serious financial commitment. If the buyer defaults on repayments and the property cannot cover the full debt, the lender can pursue the guarantor for the guaranteed amount — potentially forcing the sale of the guarantor's home.

High RiskBuyer defaults on repayments

If the buyer misses mortgage payments, the lender will first pursue the buyer. If the buyer cannot pay and the property is sold but does not cover the debt, the lender can pursue the guarantor for the shortfall up to the guaranteed amount.

Medium RiskProperty sold in negative equity

If the property value falls and the bank sells at a loss, the guarantor is liable for the difference between the sale price and the outstanding loan, up to the guarantee limit.

Medium RiskImpact on guarantor borrowing

The guarantee is a contingent liability. Some lenders count the guaranteed amount against the guarantor's borrowing capacity, which may affect their ability to access credit.

Low RiskGuarantee not automatically released

Even if the LVR drops below 80%, the guarantee does not release automatically. The buyer must formally apply to release the guarantee and the lender must approve. This can be overlooked.

Both buyer and guarantor should obtain independent legal advice before entering a guarantor arrangement. The guarantor should only proceed if they are confident the buyer can service the loan independently.

How to Use This Australian Guarantor Loan Calculator

Enter the property price, buyer's deposit, guarantor's property value, and guarantor's existing mortgage balance. The calculator shows the guarantee amount needed to reach 80% LVR, how much LMI is saved, whether the guarantor has sufficient equity, and the timeline to release the guarantee.

What is an Australian Family Guarantee Loan?

A family guarantee (or family pledge) loan allows a buyer to purchase a property with a small deposit — typically 5–10% — by using a family member's property equity as additional security. The guarantor (usually a parent) does not provide cash. Instead, a mortgage is registered on the guarantor's property to cover the gap between the buyer's deposit and 20% (80% LVR). This eliminates the need for Lenders Mortgage Insurance (LMI), saving thousands of dollars.

How the Guarantee Amount is Calculated

Guarantee Calculation:
Property Price: $750,000
80% LVR threshold: $600,000
Buyer's loan (with 5% deposit): $712,500

Guarantee needed = $712,500 − $600,000 = $112,500

LMI at ~3.5% of $712,500 = ~$24,938 (saved)

Guarantor equity needed: minimum $112,500
Guarantor property value: $800,000
Guarantor mortgage: $200,000
Available equity: $600,000 ✓

The guarantee is limited to the gap between the buyer's loan and 80% LVR. This is known as a limited guarantee and is the strongly recommended approach. The guarantor's exposure is therefore capped at the guarantee amount — not the full loan.

Risk to the Guarantor

Becoming a guarantor is a significant financial commitment that should not be undertaken lightly. Key risks include:

Default risk: If the buyer defaults on payments and the property is sold at a loss, the lender can pursue the guarantor for the shortfall up to the guaranteed amount. This could result in the forced sale of the guarantor's home.
Impact on borrowing: The guaranteed amount may be counted as a contingent liability, potentially reducing the guarantor's own borrowing capacity.
Relationship risk: Guarantee arrangements can strain family relationships if financial difficulties arise.
Non-release risk: The guarantee does not release automatically. The buyer must proactively apply for release once the LVR reaches 80%.

Both the buyer and guarantor should obtain independent legal and financial advice before proceeding. The guarantor should only proceed if confident the buyer can service the loan independently.

Example: Parents Help First Home Buyer in Sydney

Michael buys in Sydney with his parents as guarantors

Michael has saved $75,000 and wants to buy a $750,000 property in Sydney. His parents own their home worth $900,000 with a $180,000 mortgage remaining.

Property Price	$750,000
Michael's Deposit (10%)	$75,000
Michael's Loan	$675,000 (90% LVR)
LMI Without Guarantor	~$13,500
Guarantee Needed (to 80% LVR)	$75,000
Parents' Equity Available	$720,000
Can Guarantee?	Yes
LMI Saved	$13,500
Estimated Release Timeline	~3–4 years (with 5% annual growth)

Michael avoids $13,500 in LMI by using his parents' equity as a limited guarantee of $75,000. Once his LVR reaches 80% through repayments and/or property appreciation, the guarantee is formally released and the charge on his parents' property is removed.

Frequently Asked Questions

A guarantor loan allows a buyer to purchase a property with a low deposit by using a family member's property equity as additional security. The guarantor — typically a parent — provides their home equity to bridge the gap between the buyer's deposit and 20% (80% LVR). This eliminates the need for Lenders Mortgage Insurance. The guarantor does not give money; they provide security. A mortgage is registered on their property for the guaranteed amount only.

LMI savings depend on the loan amount and LVR. A 90% LVR loan of $675,000 incurs LMI of approximately $13,500. A 95% LVR loan of $712,500 incurs approximately $25,000 in LMI. With a guarantor bringing the effective LVR to 80%, these premiums are entirely avoided. On a $750,000 property with a 5% deposit, savings can exceed $24,000.

The guarantee is released when the buyer's loan-to-value ratio reaches 80% — either through regular repayments, overpayments, or property value appreciation. The buyer must proactively request a bank valuation (approximately $300–$400) to confirm the LVR. If the valuation confirms 80% LVR or below, the lender processes the guarantee release and discharges the mortgage on the guarantor's property. This typically takes 2–5 years and does not happen automatically.

A limited guarantee restricts the guarantor's liability to a specific dollar amount — typically the minimum needed to bring the buyer's effective LVR to 80%. For example, on a $750,000 purchase with a 10% deposit, the limited guarantee would be $75,000 (the gap between the $675,000 loan and $600,000 80% threshold). This caps the guarantor's risk at $75,000 rather than the full $675,000 loan. Most Australian lenders offer limited guarantees and borrowers are strongly advised to use this structure.

If the buyer defaults, the lender first pursues the buyer and may sell the property. If the sale proceeds do not cover the outstanding debt within the guarantee limit, the lender can then pursue the guarantor for the shortfall. In a worst case, the guarantor's property could be sold to recover the amount. With a limited guarantee, this exposure is capped. With an unlimited guarantee, the guarantor could be liable for the full loan. This risk is why independent legal advice is essential before guaranteeing a loan.