Australian housing deposits have stretched beyond the practical limits of many dual-income households. As of the March quarter 2025, the median dwelling value in Sydney sat above $1.15 million, pushing a standard 20 per cent deposit to $230,000 — an amount that takes the typical first-home buyer household more than a decade to save, even at aggressive savings rates. The Reserve Bank of Australia’s cash rate, held at 4.35 per cent through the first half of 2025, has done little to deflate dwelling values in the capital cities, while simultaneously compressing borrowing capacity. Lenders apply a 3 per cent serviceability buffer under APRA’s APS 220, a rule unchanged since October 2021, which means a borrower earning the median full-time salary of $95,000 is assessed at a floor rate of around 9.5 per cent against a mortgage that may only carry a 6.2 per cent headline rate. The effect is structural: higher interest buffers cut maximum loan sizes, yet deposit hurdles remain untouched. The standard escape hatch — paying Lenders Mortgage Insurance (LMI) — has become more costly. QBE’s LMI rate schedule, refreshed on 1 July 2024, lifted one-off premiums by an average of 6 per cent, meaning a $500,000 loan written at 95 per cent LVR now attracts a non-refundable premium exceeding $14,000 in many metro postcodes. For borrowers with less than 20 per cent deposit, LMI is the default. For those who can access a family guarantee, it is largely unnecessary.
How a Family Guarantee Eliminates LMI
A family guarantee loan restructures the security equation so that the lender does not face an 80 per cent-plus LVR on the borrower’s own property. Instead of the borrower paying LMI to insure the bank against a high LVR, a parent or close family member pledges equity in an existing property as a second mortgage security. The lender takes a first mortgage over the purchased dwelling and a second mortgage over the guarantor’s property, limited to a specific dollar sum — typically the shortfall between the borrower’s deposit and a 20 per cent equity cushion.
The Mechanics of a Limited Guarantee
Most Australian lenders now execute guarantees as a “limited” or “springboard” arrangement. The guarantor’s liability is capped at 20 per cent of the new property’s purchase price, plus a margin for interest and costs, and the second mortgage is discharged once the borrower’s equity reaches the agreed threshold — generally 20 per cent — or after a fixed period. Commonwealth Bank’s Family Equity Guarantee, detailed in its lending policy as of March 2025, caps the guarantee at 20 per cent of the property value and mandates a release trigger when the borrower’s LVR drops to 80 per cent, via a valuation. Westpac’s Family Springboard operates on similar terms, allowing release after the borrower has paid down the equivalent of 20 per cent of the original property value.
This structure means the borrower avoids LMI entirely. The bank’s credit exposure is not 90 or 95 per cent LVR on a single asset, because the parent’s equity absorbs the top tranche, leaving the primary security at or below 80 per cent LVR from day one. LMI is not triggered because the lender does not need to insure against a loss that sits above the 80 per cent cliff; the parental security covers that gap. For the borrower, the cash saving can be substantial. On an $800,000 purchase with a 5 per cent deposit — a $40,000 contribution — the equivalent LMI premium for a 95 per cent loan would have been around $26,000 in Sydney, based on Genworth’s premium calculator as at February 2025. Under a family guarantee loan, that cost is zero.
Deposit Sizes That Qualify
The minimum deposit required under a family guarantee is typically zero to 5 per cent of the purchase price, though the 5 per cent figure is most common at major banks. NAB’s Family Guarantee, last updated in its credit policy note on 1 February 2025, permits a minimum borrower contribution of 5 per cent genuine savings, while ANZ’s Family Guarantee, revised in October 2024, still requires a 5 per cent deposit but accepts gifted funds from the guarantor as part of the deposit. Some non-bank originators such as Pepper Money and Liberty Financial will write family guarantee loans with zero dollar deposit, provided the guarantor’s equity is sufficient, but these products carry a risk margin of 15 to 30 basis points above the equivalent standard-variable rate.
Lender Panorama: Big-Four and Non-Bank Policies
Not all family guarantee loans are created equal. Policy settings diverge on maximum LVR inclusive of guarantee, acceptable guarantor profiles, and rate premiums. The four major banks remain the volume players, but a handful of non-bank lenders now offer products that compete on both rate and policy.
Commonwealth Bank and Westpac: The Springboard Models
Commonwealth Bank and Westpac have placed the family guarantee product at the centre of their first-home buyer suites. CBA’s Family Equity Guarantee allows a combined LVR of up to 105 per cent of the property value when the guarantee is included. The borrower must supply 5 per cent deposit from genuine savings, and the guarantee is drawn for the remaining 15 per cent plus costs. The interest rate is the same as CBA’s advertised owner-occupier principal-and-interest rate for LVRs up to 80 per cent — typically 6.49 per cent p.a. as at 15 May 2025, variable, with a comparison rate of 6.87 per cent p.a. Westpac’s Family Springboard operates almost identically, although it accepts a 5 per cent deposit partly derived from the First Home Owner Grant in states where the grant is paid at settlement rather than at completion.
NAB and ANZ: Conservative Guarantor Eligibility
NAB and ANZ impose tighter rules on who can act as a guarantor. Both lenders require the guarantor to be an immediate family member — parent or, in some cases, sibling — who holds clear title to an Australian residential property with a maximum LVR of 80 per cent on their own security. NAB, as of its February 2025 policy note, caps the guarantee to 20 per cent of the borrower’s purchase price and will not accept a guarantee from a self-managed super fund or a family trust. ANZ extends the guarantor pool to step-parents and long-term de facto partners of parents, but excludes properties with existing second mortgages. Neither bank charges a rate loading above their standard LVR-tier rate; the loan is priced as a sub-80 per cent LVR facility, which for ANZ owner-occupiers stood at 6.44 per cent p.a. variable in April 2025.
Non-Bank Alternatives and Rate Loadings
Outside the major banks, Pepper Money’s Family Assist product permits a guarantee up to 25 per cent of the borrower’s property price and allows a zero dollar deposit from the borrower, provided the borrower meets a minimum serviceability threshold at an assessment rate of 9.0 per cent. Pepper’s variable rate for a family guarantee loan, as of 1 March 2025, was 6.79 per cent p.a. — a 25-basis-point premium over the major-bank equivalent. Liberty Financial’s Family Pledge product similarly enables a zero deposit loan but applies a $395 annual fee and requires a full valuation of the guarantor’s property at the borrower’s expense. Resimac’s family guarantee option is available only through mortgage brokers and restricts the guarantee to a maximum 15 per cent of the purchase price, which means the borrower must contribute 5 per cent upfront and the LVR cannot exceed 95 per cent including the guarantee.
Serviceability and the APRA Buffer at High LVRs
Even without LMI, a family guarantee loan must pass the same serviceability test as any other mortgage. The APRA requirement, articulated in Prudential Practice Guide APG 223 and unchanged since the 1.5-percentage-point increase in October 2021, mandates lenders to assess home loan applications at a rate that is 3 per cent above the product’s headline rate or the bank’s pre-existing floor rate, whichever is higher. For a family guarantee loan priced at 6.49 per cent p.a., the serviceability floor is typically 9.5 per cent. This buffer bites harder on lower-income borrowers who are the core users of family guarantees.
How the 3 Per Cent Buffer Reduces Max Loan Size
Consider a single borrower on $95,000 per year with no dependants and average living expenses of $2,100 a month, as per the Household Expenditure Measure benchmarks. At a 9.5 per cent assessment rate over a 30-year principal-and-interest term, the maximum loan size pre-tax is approximately $395,000. Add a partner earning $65,000, and the combined borrowing capacity rises to around $670,000. In Sydney, where the median apartment price is $810,000, even a dual-income couple on $160,000 combined falls short of the purchase price unless the deposit is large. The family guarantee lowers the deposit hurdle but does nothing to inflate the couple’s serviceability. The 3 per cent buffer, set by APRA to “reinforce the resilience of the banking system” (APRA letter to ADIs, 6 October 2021), intentionally constrains loan sizes and has not been relaxed despite three years of steady 4.35 per cent cash rate. For family guarantee borrowers, this means the deposit no longer blocks entry, but income still governs how much they can bid.
Debt-to-Income Limits at Major Lenders
Beyond the buffer, most ADIs enforce a hard debt-to-income (DTI) limit. Commonwealth Bank’s proprietary credit policy, as described in broker communications on 3 April 2025, caps total debt-to-income at 7.0 times for owner-occupier loans with an LVR above 80 per cent — and treats the combined debt clocked by the guarantee as part of that ratio only if the guarantor is servicing the guaranteed portion separately. In practice, CBA excludes the guarantee amount from DTI unless the guarantor is also a co-borrower. Westpac and NAB both apply a maximum DTI of 7.5 times, with NAB imposing an automatic credit review for any application above 6.5 times. For a couple earning $160,000, DTI of 7.5 times translates to a maximum borrowing limit of $1.2 million, well above the serviceability ceiling, so DTI is rarely the binding constraint for family guarantee deals. Non-bank lenders such as Pepper Money, which do not face APS 220 directly but are governed by ASIC’s responsible lending obligations, run internal DTI caps of 8.0 to 9.0 times, though rates are higher.
Risks and Legal Protections for Guarantors
A family guarantee is a serious legal undertaking for the parent or relative pledging their own home equity. Australian courts will enforce a guarantee if it is properly documented and the guarantor received independent legal advice. Lenders have simplified the product to reduce risk, but a guaranter’s home can still be sold in the event of a borrower default.
Limited Guarantee vs. Unlimited Liability
Modern family guarantee products are almost universally “limited” guarantees, as opposed to the “all moneys” guarantees that were common in the 1990s. Under CBA’s 2025 terms, the guarantor’s liability is capped at the original dollar amount of the guarantee plus interest and reasonable enforcement costs, and the guarantee is not cross-collateralised against other debts the borrower may hold with the bank. This shield, enacted by the Banking Code of Practice clause 135, was the direct result of the Hayne Royal Commission’s finding that lenders had failed to adequately explain the breadth of all-moneys clauses. Guarantors must now receive a clear written statement of the maximum dollar amount they could owe before signing. Westpac’s Family Springboard policy, as updated on 15 August 2024, limits the guarantee to 20 per cent of the purchase price plus $10,000 for costs.
The Release Mechanism
Equally important is the release mechanism. Guarantors do not remain on the hook for 30 years. Once the borrower’s LVR reaches 80 per cent of the original property value, the lender must discharge the second mortgage — provided the borrower meets the bank’s credit criteria at that time and pays any release and valuation fees. This usually occurs after three to five years, depending on property price changes and principal payments. NAB’s February 2025 policy note specifies that the borrower must not have any missed payments in the six months preceding the release request. ANZ imposes an additional requirement that the borrower’s income has not materially declined since origination. If property values fall, the release may be delayed until the borrower’s equity rebuilds. In a declining market, a guarantor could remain responsible for longer than expected.
Independent Legal Advice Requirement
All major banks and most non-bank lenders require the guarantor to obtain a signed certificate of independent legal advice from a solicitor who is not acting for the borrower. The solicitor must explain the nature of the guarantee, the maximum liability, and the consequences of default. This is not a formality. Failure to provide the certificate will see the loan settlement rejected. The cost of this advice, typically $400–$700, is borne by the guarantor or the borrower, and is in addition to the lender’s own legal fees.
Alternatives for Borrowers Without Family Support
Family guarantees are unavailable to borrowers whose parents do not hold sufficient unencumbered equity. The 2025 housing market offers three main government-backed alternatives that also bypass LMI.
First Home Guarantee Scheme (FHBG)
The federal government’s First Home Guarantee, administered by Housing Australia, guarantees up to 15 per cent of a property’s value so that eligible first-home buyers can purchase with as little as 5 per cent deposit and no LMI. The scheme is restricted by property price caps — $900,000 for Sydney and major NSW regional centres, $800,000 for Melbourne, and $700,000 for Brisbane as of the 2024–25 allocation. 35,000 places are issued each financial year, and the places for 2024–25 were exhausted by December 2024, according to Housing Australia data released 15 January 2025. The next allocation will open on 1 July 2025, and places are typically claimed within weeks. This scheme is an alternative for borrowers whose income meets the single $125,000 or couple $200,000 thresholds and who are purchasing within the cap.
Family Home Guarantee and Regional First Home Buyer Support
The Family Home Guarantee targets single parents with dependants, offering a 2 per cent deposit loan without LMI for property purchases up to the same caps. 5,000 places were available in 2024–25, and uptake was slower than the FHBG, with 1,200 places remaining as of late March 2025, per Housing Australia’s dashboard. The Regional First Home Buyer Support scheme, launched in 2023, extends similar terms to buyers in designated regional postcodes. Unlike family guarantees, these programs do not involve a second mortgage and do not affect a relative’s borrowing capacity.
Shared-Equity Schemes (WA, VIC)
Western Australia’s Shared Home Ownership scheme and Victoria’s Homebuyer Fund allow the state government to co-invest up to 25 per cent of a property’s value, reducing the borrower’s required deposit and eliminating LMI. These schemes function as equity partnerships: the government shares in capital gains or losses proportionate to its stake. In Victoria, as of the April 2025 program update, the Homebuyer Fund accepts applications from borrowers with incomes up to $130,750 for singles and $208,965 for couples, with a 5 per cent deposit. The buyout of the state’s share must occur within 10 years or upon sale.
Five Steps Before Applying for a Family Guarantee
Borrowers considering a family guarantee in mid-2025 should move through a sequence of verifications before signing a contract of sale. The product eliminates LMI, but it embeds a multi-party security arrangement that demands precise coordination.
-
Verify the guarantor’s unencumbered equity. Lenders will require a valuation of the guarantor’s property, and the maximum second mortgage amount — usually 20 per cent of the purchase price — must not push the guarantor’s overall LVR above 80 per cent. If the guarantor already has a mortgage of $400,000 on a $1 million property, the existing 40 per cent LVR leaves room for a guarantee of only up to $200,000, assuming a maximum combined LVR of 60 per cent on the guarantor’s home.
-
Run a serviceability test at the 3 per cent buffer. Before engaging a broker, use the lender’s online calculator with the assessment rate, not the headline rate. A couple earning $160,000 can expect a maximum loan around $670,000 at a 9.5 per cent floor, but if one partner has a HECS debt or credit card limits exceeding $10,000, the figure drops. Request a full credit assessment early, because pre-approvals for family guarantee loans take longer than standard applications — typically 10 to 15 business days at the majors, and up to 25 days at non-banks.
-
Compare release terms across at least two lenders. CBA and Westpac release the guarantee when the LVR hits 80 per cent based on a new bank valuation and six months of clean repayment history. NAB requires only three months of no missed payments but charges a $350 release fee. ANZ’s ten-month clean history requirement is the strictest. If early release is a priority, NAB or CBA may be preferable.
-
Budget for the legal and valuation costs. Guarantors will need a certificate of independent legal advice ($400–$700) and a valuation of their property ($300–$500, often paid by the borrower). The borrower will also pay a valuation of the new property and possibly a guarantee establishment fee — ANZ charges $200, while Westpac and CBA do not. Total upfront costs can reach $1,500.
-
Lock in a rate review date. Family guarantee loans are not a fixed-rate product by default. If the borrower fixes the rate, the guarantee terms often change, and post-fix reversion rates may be higher than standard variable offers. Monitor the rate cycle and refinance to a non-guarantee loan as soon as equity reaches 20 per cent, avoiding the guarantee’s ongoing constraints on the guarantor’s own borrowing capacity.