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Guarantor and family support

Who can be a guarantor for a home loan?

Check whether your parent, relative or friend can provide a guarantee, including retirement, existing mortgages, joint owners and property requirements.

An adult son and his father talking while preparing a meal together.

Can your family member be a guarantor?

Parents are a common choice. Some lenders also accept a step-parent, sibling, grandparent or adult child. I check the relationship, their property and their financial circumstances before relying on the guarantee.

Retirement or an existing mortgage does not automatically rule them out. Their willingness to help is only the start of the assessment.

Start with the family relationship

I’d check the lender’s rules before your family spends time gathering documents or you make an offer.

  • Common starting point

    Parent or legal guardian

    The lender still checks their property, finances and ability to understand the guarantee.

  • Depends on the lender

    Step-parent, sibling, grandparent or adult child

    Some lenders accept these relationships. We need to check the particular lender and loan, including who owns the proposed security.

  • Check this early

    Friend or distant relative

    Many family-guarantee products will not fit. Owning a property together does not automatically make someone an accepted guarantor.

An accepted relationship is only the first check. The property, all owners and the guarantor’s circumstances still need to meet the lender’s requirements.

Our team has had a close family friend declined even though she already co-owned property with the buyer. Escalating the family circumstances did not change that lender’s decision.

For example, Westpac's Family Security Guarantee lists parents, legal guardians, siblings and adult children. That does not establish another lender's rules or mean that every relative qualifies. Our Westpac review covers the lender more broadly.

Security, servicing and buying together

A family security guarantee uses property to help with the deposit. Your income must still support your loan. If repayments are the problem, read whether a guarantor increases borrowing power before asking someone to put their home behind it.

If someone suggests a servicing guarantee, ask exactly whose income and obligations the bank is assessing; it is a different arrangement and availability is limited.

Adding a parent as a co-borrower also changes their responsibility for the debt. Our family help comparison explains the options to discuss if affordability is the problem.

Can retired parents or parents with a mortgage help?

They may be able to. I would check both the equity available and what the guarantee could mean for their own finances. A debt-free home alone does not settle whether the arrangement suits them.

Parents who are retired or approaching retirement

There is no single age limit across all lenders. Some may consider retired parents; others apply narrower requirements. We need to check their income and financial position where required, the proposed guarantee and their plans to sell, borrow or downsize.

The family should understand how long the guarantee could remain. We can plan a review as the buyer builds equity, but we cannot promise release on a retirement date.

Parents who still owe money on their home

An existing mortgage reduces the equity available. If their home is worth $800,000 and they owe $300,000, the $500,000 difference is total equity. The lender will not necessarily accept all of it as support for your loan.

We check the lender's permitted security limit, every debt already secured against the property and the size of the proposed guarantee. If another bank holds the first mortgage, both lenders need to accept the arrangement and any required consent or priority terms.

We have had applications held up while the guarantor's refinance paperwork and evidence of credit card closures were gathered. If approval depends on an existing loan or card being closed, keep the confirmation and send it through early.

Will the lender accept the property and its owners?

The property's location, type, value and ownership all matter. Give us the address early, especially for rural land, a small town, an unusual home or a property with several owners.

  • Accepted value

    The lender decides which valuation it will use. An agent appraisal or online estimate is a starting point.

  • Existing commitments

    Confirm mortgages, other guarantees and any linked properties before calculating available support.

  • Every owner

    Joint owners may need to participate. Each person needs to understand the obligation and obtain independent advice.

What if my parents are separated?

Joint ownership can complicate a guarantee when the owners are no longer together. Our team has seen 2 major banks decline a mother and her ex-partner as guarantors, even though they jointly owned the property and both wanted to help. I would check the ownership and lender requirements rather than assume two signatures solve it.

One parent's separately owned property may offer another option, if suitable. Changing ownership to obtain a loan is a much larger legal and financial decision and needs separate advice.

Can parents living overseas go guarantor?

Some lenders may consider an overseas-based relative who owns acceptable property in Australia, with extra identity, signing and residency checks. An overseas property itself generally cannot support the Australian family-guarantee arrangements discussed here.

If family is considering sending a cash gift instead, we need to document its source and whether repayment is expected. If they borrow overseas to fund that gift, their own repayments and risks need considering too.

What if the bank has already said no?

I would ask for the reason before approaching another bank. It may be the family relationship, insufficient usable equity, the property or the buyer's ability to repay. Each needs a different response.

What to check after a decline

  1. Relationship refused
    Check whether another lender accepts that family relationship before lodging a new application.
  2. Property or equity refused
    Review the valuation, existing debts and whether a smaller guarantee or another acceptable property works.
  3. Buyer cannot afford the loan
    Review accepted income, debts and budget. A family security guarantee does not add the parent's income to the application.
  4. Risk or future plans do not fit
    Compare a cash gift, government scheme or more savings. The family can decide the guarantee is not right for them.

Construction and investment purchases may have additional conditions. A lender's acceptance of a guarantee for one kind of purchase does not establish that it will accept yours.

The 5% Deposit Scheme may be worth comparing if you meet its requirements. Our ways parents can help guide also covers gifts, family loans and buying together.

What will your guarantor need to provide?

Prepare for the initial check
InformationWhat to bring
Your purchaseBudget, savings, expected borrowing and the type of property.
The relationshipWho wants to help and their relationship to each borrower.
Their propertyAddress, owners, approximate value and current mortgage details.
Their future plansAny sale, retirement, refinance or other family help they expect.
For the applicationIdentification, lender-requested financial documents, valuation and signed guarantee documents after independent advice.

Prepare for the initial check

Information

Your purchase

What to bring
Budget, savings, expected borrowing and the type of property.
Information

The relationship

What to bring
Who wants to help and their relationship to each borrower.
Information

Their property

What to bring
Address, owners, approximate value and current mortgage details.
Information

Their future plans

What to bring
Any sale, retirement, refinance or other family help they expect.
Information

For the application

What to bring
Identification, lender-requested financial documents, valuation and signed guarantee documents after independent advice.

The guarantor should have their own legal advice before signing. We can explain the lending options, but their solicitor needs to explain what the guarantee commits them to. Read going guarantor risks and how release works together.

Frequently asked questions

Experience and sources

How this guide was checked

I checked the lender and government sources below on 29 September 2026. We confirm the requirements for your loan and property before recommending an application.

Written byJayden VecchioMortgage Broker

Let us check your proposed guarantor

Tell us who wants to help, their property address and roughly what they still owe. We can check likely obstacles before you rely on their guarantee.

or call 1300 088 065

General information only. Your circumstances and current lending criteria need to be assessed. Guarantors should obtain independent legal advice before signing; family property transfers also need legal and tax advice.