How Family Guarantee Arrangements Work for First Home Buyers in Australia

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For many first home buyers, saving a 20% deposit feels like an impossible hurdle. Rising property prices, rent increases, and everyday living costs often mean that by the time a deposit is saved, prices have moved again.

Family Guarantee arrangements — commonly known as guarantor home loans — are one way Australians enter the property market sooner. Instead of contributing a full cash deposit, a family member uses the equity in their own home to support the purchase. When structured correctly, this can help buyers avoid Lenders Mortgage Insurance (LMI), reduce upfront costs, and buy earlier than they otherwise could.

This guide explains how family guarantees work, who they suit, the risks involved, how guarantees are removed, and how they differ from gifted deposits and government-backed schemes.

What Is a Family Guarantee?

A family guarantee is a lending arrangement where a close family member (usually parents) offers part of their property’s equity as security for a first home buyer’s loan.

Rather than gifting cash, the guarantor provides additional security to the lender. This reduces the lender’s risk and allows the buyer to borrow with a lower effective Loan-to-Value Ratio (LVR).

Family guarantees are commonly used to:

Avoid paying Lenders Mortgage Insurance (LMI)
Buy with a small or no cash deposit
Enter the property market sooner

How a Family Guarantee Works

Using Equity as Security

The guarantor allows the lender to take a limited security interest over their property. No money changes hands — it is a legal commitment tied to the loan.

Typical Loan Structure

Most lenders split the loan into two parts:

Loan A (around 80%)
Secured against the property being purchased.

Loan B (around 20%)
Secured against the guarantor’s property.

This structure reduces the buyer’s LVR to 80% or less, even if their actual deposit is much smaller.

Who Is Responsible for the Loan?

The borrower is responsible for repaying 100% of the loan.
The guarantor is only liable for the guaranteed portion if the borrower defaults.
Most guarantees are limited, meaning the guarantor is not responsible for the full loan amount.

Key Benefits of a Family Guarantee

Avoiding Lenders Mortgage Insurance (LMI)

LMI is often required when borrowing above 80% of a property’s value. A family guarantee can remove this cost entirely, saving buyers many thousands of dollars.

Lower Deposit Requirements

Some buyers can purchase with minimal savings, or no deposit at all (depending on lender policy).

Buying Sooner

Rather than spending years saving a larger deposit, buyers can enter the market earlier and begin building equity.

Limited Guarantor Exposure

Modern family guarantees are usually capped to a specific dollar amount or percentage, rather than covering the full loan.

Who Can Act as a Guarantor?

Most lenders allow guarantors who are:

Parents or step-parents
Siblings
Grandparents
Legal guardians

The guarantor must generally:

Own property in Australia
Have sufficient usable equity
Meet the lender’s legal and credit requirements

Some lenders require the guarantor’s property to be unencumbered, or mortgaged with the same lender.

Borrower Eligibility: What Lenders Still Require

A family guarantee does not replace normal lending checks. The buyer must still demonstrate they can afford the entire loan on their own, without relying on the guarantor’s income. Lenders assess income, employment stability, living expenses, existing debts, and credit history. A guarantee helps with security, not serviceability.

Family Guarantees vs Gifted Deposits: What’s the Difference?

Some first home buyers receive help through gifted cash instead of a family guarantee — and the two are often confused.

A gifted deposit involves a family member giving cash toward the purchase. Lenders require a gift letter confirming the funds are a genuine gift, the money does not need to be repaid, and the giver has no ownership claim on the property. A gift letter helps verify where the deposit came from, but it does not provide security to the lender.

Key Differences at a Glance

A gifted deposit increases the buyer’s cash contribution
A family guarantee reduces the lender’s risk using equity
A gift alone only removes LMI if it gets the LVR below 80%
A guarantee can remove LMI even with little or no cash deposit

Can Gift Letters and Family Guarantees Be Used Together?

Yes. This is common. For example:

Buyer has limited savings
Family gifts a small amount (documented by a gift letter)
A family guarantee covers the remaining gap to 80% LVR

In this setup, the gift letter satisfies deposit verification rules, and the guarantee provides security. Both tools work together but remain legally separate.

How and When a Family Guarantee Can Be Removed

Family guarantees are not permanent. In most cases, the guarantee can be released once the loan balance falls to 80% or less of the property value. This can occur through:

Regular repayments
Extra repayments
Property value growth
Refinancing (subject to lender approval)

Once released, the guarantor’s property is no longer tied to the loan.

Risks and Considerations for Guarantors

Financial Risk

If the borrower defaults and the sale of the property does not cover the debt, the lender may recover the guaranteed portion from the guarantor. In serious cases, this could involve selling the guarantor’s property.

Reduced Borrowing Capacity

While the guarantee is active, it can limit the guarantor’s ability to borrow for renovations, investments, or personal lending.

Legal and Financial Advice Is Essential

Most lenders require guarantors to obtain independent legal advice, and financial advice is strongly recommended before proceeding.

How Family Guarantees Differ from the Government Family Home Guarantee

A private family guarantee should not be confused with the Family Home Guarantee, which is part of the Australian Government’s Home Guarantee Scheme administered by Housing Australia.

Government Family Home Guarantee (Summary)

This scheme is designed for single parents or single legal guardians and allows eligible buyers to:

Purchase with as little as a 2% deposit
Avoid paying LMI
Have the government guarantee up to 18% of the property value

Key differences:

No family member’s property is used as security
Strict income and property price caps apply
Places are limited each financial year
The government guarantee replaces the need for a private guarantor, but eligibility is narrower.

Which Option Is Right for You?

A Private Family Guarantee may suit buyers who:

Have family members with strong equity positions
Want flexibility on price or location
Do not qualify for government schemes

The Government Family Home Guarantee may suit buyers who:

Are single parents
Have limited savings
Prefer not to involve family property or finances

Each option has different risks, benefits, and long-term implications.

Final Thoughts

Family guarantee arrangements can be powerful tools when structured correctly. They can help first home buyers avoid LMI, reduce deposit pressure, and enter the market sooner. However, they also involve real risk — particularly for guarantors.

Clear advice, careful planning, and professional guidance are essential to ensure the arrangement benefits everyone involved, both now and in the future.

FAQs: Family Guarantee Arrangements

What is a family guarantee for a home loan?

A family guarantee is when a family member uses equity in their property to secure part of a first home buyer’s loan, helping reduce the loan-to-value ratio and avoid LMI.

Is a gift letter the same as a family guarantee?

No. A gift letter documents gifted cash for a deposit. A family guarantee uses property equity as security and does not involve cash.

Can a family guarantee be removed later?

Yes. Most guarantees can be released once the loan balance falls below 80% of the property value.

What happens if the borrower defaults?

The borrower remains responsible for the loan. The guarantor is only liable for the guaranteed portion if the lender cannot recover the debt from the property sale.