Even with a guarantor, the borrower must demonstrate they can comfortably service the full loan on their own income. The lender tests your repayment capacity at a buffer rate, usually 2% to 3% above the actual interest rate, just as they would for any standard home loan.
Income AssessmentThe guarantor's property must have sufficient usable equity after their own loan is accounted for. Lenders also check that the guarantor can service their own debts without relying on the borrower. A clear equity position and clean credit history strengthen the application.
Security AssessmentThese are general guide ranges only. Final terms depend on lender policy, borrower profile and the guarantor's equity position.
The guarantor's equity replaces the deposit shortfall, but the borrower still needs to prove full loan serviceability. Lenders assess both parties independently before approving the arrangement.
Lenders assess the borrower and the guarantor separately. The borrower must be able to service the loan independently, and the guarantor must have clear equity and a stable financial position.
Self-employed borrowers using a family guarantee may also want to compare low doc home loans if income documentation is limited.
A family guarantee can be used in several situations where the borrower has the income but not yet the full deposit.
To understand how LMI works and what it could cost without a guarantor, see Lenders Mortgage Insurance explained.
These factors usually determine whether a guarantor home loan is approved, how much you can borrow and when the guarantee can be released.
You must be able to service the full loan on your own income. The guarantor's income is not used to boost your borrowing capacity.
The guarantor needs sufficient equity in their property after their own mortgage is factored in. More available equity generally means a stronger application.
Most lenders cap the guarantee at a specific dollar amount, usually covering the portion above 80% LVR. This limits the guarantor's maximum exposure.
Lenders generally require the guarantor to be an immediate family member. Parents are the most common, though some lenders accept siblings or grandparents.
The guarantor is typically required to obtain independent legal advice before signing. Some lenders also require independent financial advice for the guarantor.
Lenders want to see a realistic path to releasing the guarantee, usually through repayments, property growth or a combination within a reasonable timeframe.
A guarantee is not for a fixed term and the guarantor cannot simply withdraw it. It stays in place until the lender agrees to release it, which normally means one of two things has happened: your loan has fallen to about 80% of the property's current value, or the guaranteed amount has been repaid. Most borrowers get there through a mix of repayments and capital growth over two to five years, then ask the lender for a release.
Say you bought for $500,000 with a 100% loan and your parents guaranteed the top 20%, which is $100,000. The lender will usually release them once your loan is no more than 80% of a new valuation. If the loan is still around $480,000, the property needs to value at about $600,000. If the value has only reached $550,000, you would need to pay the loan down to about $440,000 or make up the gap with a lump sum. Watch the LMI trap: if you release the guarantor while the loan is still between 80% and 90% of value, the lender may approve the release but charge Lenders Mortgage Insurance on the portion above 80%, so compare that cost with waiting a little longer.
If the equity is not there yet, the options are to pay a lump sum down to the release point, accept LMI on the portion above 80%, or keep paying and revalue in 12 months. A release is often pushed forward by life rather than numbers: parents who want to sell or borrow against their home, a separation, or family pressure to be released. If that is your situation, read the next section.
Yes, a guarantor can sell their property, but the lender holds a mortgage over it as security for the guarantee, and it will not release that mortgage at settlement until the guarantee has been dealt with. A sale cannot settle with the lender's mortgage still on the title, so this has to be sorted out before settlement day, not on it. There are three ways it is dealt with:
With a limited guarantee the parents are on the hook for the guaranteed amount, not the whole loan. The lender can only call on their home if the child defaults and the sale of the child's property leaves a shortfall, and only up to that capped figure. Selling does not change the amount, it just brings forward the day the lender needs it secured or repaid. Ask the lender in writing for the current guaranteed amount before listing, because the release decision turns on that number and the child's current loan balance, not on the original purchase.
The common mistake is listing the property, accepting an offer with a standard settlement period, and only then telling the lender. The lender needs weeks, not days: a valuation of the child's property, a credit reassessment if the child is refinancing, consent to any substitute security, and preparation of the discharge. Start the conversation before the campaign, and if a contract is signed before the release is confirmed, ask your conveyancer to negotiate a longer settlement. If the parents are moving into a retirement village or aged care and need the full sale proceeds for the entry payment or accommodation deposit, a release or substitution is far better than a payout from proceeds, which makes an early refinance of the child's loan the cleanest path.
A broker can order an upfront valuation of the child's property, check whether the current lender will release or whether a refinance to a new lender gets the parents off the title sooner, and line that up with the sale so settlement is not held up. Tell us your situation and we will match you with a broker who handles guarantor releases.
A family guarantee can solve the deposit gap, but there are situations that can cause delays or complications.
If the guarantor's property has a large existing mortgage, the remaining equity may not be enough to cover the guarantee amount the lender needs.
A guarantor helps with the deposit shortfall but does not boost borrowing power. If your income does not support the loan size, the application may still be declined.
If the guarantor's property is mortgaged with a different lender, that lender needs to consent to a second mortgage being registered on the title. Not all lenders agree.
A guarantee involves real financial risk for the family member. If the guarantor is uncertain or feels pressured, the arrangement may not proceed or could create conflict later.
Agree with your family member on who will act as guarantor and confirm they are willing to proceed. Both parties should understand the obligations early.
Confirm your income supports the full loan amount. The guarantor provides security, not extra borrowing power, so your serviceability must stand on its own.
Work out how much usable equity the guarantor has after their existing mortgage. This determines how much of your deposit gap can be covered.
The guarantor must obtain independent legal advice before signing. Some lenders also require independent financial advice. This protects both parties.
Not all lenders offer guarantor loans, and policies vary. Compare which lenders suit your deposit position, loan size and guarantor structure.
Submit the application with both borrower and guarantor documents. Respond to lender conditions promptly and prepare for valuations on both properties.
A guarantor home loan uses a family member's property equity as additional security for your mortgage. The most common structure is a limited guarantee, where the guarantor's exposure is capped at a specific dollar amount, typically enough to cover the gap between your actual deposit and the 20% threshold lenders usually require to avoid Lenders Mortgage Insurance.
The guarantor does not make repayments, does not appear on the property title and does not receive any ownership interest. Their role is limited to providing security. If the borrower defaults and the primary property does not cover the outstanding balance, the lender can call on the guaranteed portion. Because the guarantee is limited, the guarantor's total exposure is defined upfront.
Once the borrower builds sufficient equity, generally reaching a loan-to-value ratio of 80% or less, the guarantee can be released. This can happen through regular repayments, property value increases or a combination. Many borrowers target releasing the guarantee within 2 to 5 years. After release, the guarantor's property is no longer tied to the loan.
Guarantor home loans are not limited to first home buyers. They can suit anyone who has the income to service a loan but has not yet saved a full deposit. If you are also considering other pathways to reduce your upfront costs, compare options under home loans or speak with a finance professional about which structure suits your situation.

Guarantor home loans involve specific lender policies around equity requirements, family relationships and guarantee structures. A suitable finance contact can help you find the right lender and structure.
Property Finance Help connects users with finance professionals who understand guarantor lending and family guarantee arrangements.
Property Finance Help is a lead generation service, not a lender, broker, or financial adviser. All information on this website is general in nature and does not take into account your personal objectives, financial situation, or needs. Consider seeking independent professional advice before making any financial decision.
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