Guarantor Home Loans in Australia: How They Work and What to Consider

Buying a home with a small deposit is hard. But if you have a parent or family member with equity in their own property, a guarantor arrangement may allow you to purchase sooner, avoid Lenders Mortgage Insurance, and borrow more than your deposit would normally allow. It is one of the most powerful tools available to first home buyers, and one of the most misunderstood.

What Is a Guarantor Home Loan?

A guarantor home loan is one where a third party, almost always a parent or close family member, offers the equity in their own property as additional security for your loan. This extra security reassures the lender that the loan is adequately secured, even if your deposit is small.

The guarantor does not give you money. They do not make your repayments. What they offer is their property as collateral, and they agree to be liable for the guaranteed portion of your loan if you default and your property does not cover the shortfall.

How Does the Guarantee Reduce or Eliminate LMI?

Lenders require Lenders Mortgage Insurance when a borrower's loan-to-value ratio (LVR) exceeds 80 per cent. With a guarantor, the lender has two properties securing the loan, not one. The guarantee effectively reduces the lender's risk to the equivalent of an 80 per cent or lower LVR, even if your deposit alone would not achieve that.

In practical terms: if you are buying a $600,000 home with a $30,000 deposit (a five per cent deposit), your LVR would normally be 95 per cent and LMI could cost $15,000 or more. With a parental guarantee providing $90,000 in additional security (the difference between your 80 per cent threshold and your actual borrowing), the lender treats the loan as if it is secured to 80 per cent. LMI no longer applies.

Types of Guarantees

Most lenders structure guarantor loans using a limited guarantee rather than an unlimited guarantee.

A limited guarantee caps the guarantor's liability at a specific dollar amount, typically the amount needed to bring the LVR to 80 per cent. The guarantor is not on the hook for the entire loan.

An unlimited guarantee makes the guarantor liable for the full outstanding balance. Most responsible lenders use limited guarantees and encourage borrowers to structure things this way.

Always confirm which type of guarantee is being used and have both parties obtain independent legal advice before signing.

Who Can Be a Guarantor?

Most lenders restrict guarantors to immediate family members. Parents are the most common choice. Some lenders also accept siblings, adult children, grandparents or de facto partners in certain circumstances.

The guarantor must:

Own property in Australia with sufficient equity to cover the guaranteed amount.

Be willing to have a valuation done on their property.

Obtain independent legal and financial advice before signing.

In some cases, meet the lender's own age requirements. Many lenders will not accept a guarantor whose own mortgage will extend past their expected retirement age.

What Are the Risks for the Guarantor?

The guarantor takes on real financial risk. If you cannot make your repayments and the lender needs to recover funds, the lender can call on the guarantee. This could result in the guarantor's property being used to cover the shortfall.

This is not a theoretical risk. It happens. Guarantors should not enter these arrangements without genuinely understanding what they are signing up for, and without obtaining independent legal advice.

The guarantee also affects the guarantor's own borrowing capacity. Lenders assess the guarantee as a contingent liability. If the guarantor plans to refinance, access equity or purchase another property, the guarantee needs to be factored in.

How Is the Guarantee Released?

The guarantee does not stay in place forever. Once the loan balance reduces to the point where the LVR, based on your property's current value, is 80 per cent or below, you can apply to have the guarantor released from the agreement.

This typically happens through:

Regular loan repayments reducing the principal.

Capital growth in the property, which reduces the effective LVR even without extra repayments.

A combination of both.

The process requires a formal application to the lender and may involve a new property valuation. Most borrowers aim to release the guarantor within three to seven years.

Can You Buy Any Property?

Not all properties are accepted as security in guarantor loan structures, and not all of the guarantor's properties will be accepted either. Inner-city apartments in high-density buildings, remote properties and unusual property types may be rejected or assessed conservatively.

Your lender will assess both the property you are purchasing and the guarantor's property, and apply their own rules about acceptable security. It is worth checking these criteria early in the process.

Guarantor Loans vs Other Low Deposit Options

A guarantor arrangement is one of several options for buying with a smaller deposit. The First Home Guarantee allows eligible first home buyers to purchase with five per cent without LMI. Help to Buy reduces the loan size through shared equity. And some professional waivers eliminate LMI for borrowers in specific occupations.

A guarantor loan can be more flexible because it is not subject to income caps or property price limits the way government schemes are. It can also be used for higher-priced properties that would not qualify under government scheme thresholds. However, it requires a willing and financially capable family member.

Practical Steps if You Are Considering a Guarantor Loan

Have an honest conversation with the prospective guarantor. Make sure they fully understand what the arrangement involves and what could happen if things go wrong.

Have both parties get independent legal advice before signing. This is not a formality. It is important.

Use a mortgage broker to compare lenders, since guarantor loan policies, maximum LVRs and eligibility rules vary.

Agree on a realistic plan for releasing the guarantor within a defined timeframe.

Use the free Borrowing Capacity calculator at HomeLoanTools.com.au to understand how much you could borrow with or without a guarantor, and the Stamp Duty calculator to estimate your total purchase costs.