Most first home buyers hear the same advice: save a 20% deposit before you even think about buying. But in a market where property prices keep moving, waiting to hit that threshold can mean chasing a target that never stops shifting. The good news is that 20% is not actually a hard requirement. It is simply the point where one particular cost disappears.
That cost is Lenders Mortgage Insurance, and understanding it changes everything about how you approach low deposit home loans. Rather than treating a sub-20% deposit as a disqualifying problem, this guide reframes it as a variable you can calculate, plan around, and in many cases significantly reduce.
In the sections ahead, you will learn exactly what LMI is and how much it actually costs, how to weigh paying it now against the opportunity cost of waiting, and four legitimate pathways that could help you avoid or minimise it altogether. You will also get a clear picture of your true upfront cash requirement and a practical framework for choosing the right approach for your situation.
What LMI Actually Is and Why It Exists
Lenders Mortgage Insurance exists to protect the lender, not you. If you default and the property sells for less than the outstanding loan balance, LMI covers the lender’s shortfall. You bear the cost but receive none of the protection.
It is triggered the moment your loan-to-value ratio (LVR) exceeds 80%, meaning your deposit is less than 20% of the purchase price. A $600,000 property requires at least $120,000 down to avoid it. Below that threshold, LMI becomes a condition of your loan approval.
The premium is calculated as a percentage of the loan amount, not the property value, and the rate rises with each LVR band. Borrowing at 95% LVR costs considerably more than borrowing at 85% LVR on the same property, because the insurer’s risk exposure increases. Some states apply stamp duty on top of the LMI premium, increasing the total cost, check your state’s position.
You have two ways to pay it: upfront at settlement, which keeps the cost contained, or capitalised into your loan balance, which spreads the cash impact but means you pay interest on that premium for the full loan term. On a long loan term, interest on a capitalised premium can add meaningfully to its total cost. The How Much Does LMI Actually Cost section below models both scenarios.
Before you decide which path suits you, use Ratebuster’s home loan repayment calculator to model how a capitalised LMI premium affects your monthly repayments compared with paying it upfront.
How Much Does LMI Actually Cost? A Worked Example
Knowing that LMI applies below 80% LVR is one thing; understanding what it actually costs is what lets you make a real decision.
LMI is not a flat fee. The premium scales with your LVR band non-linearly. A loan at 90% LVR carries a materially higher premium than one at 85% LVR on the same property, even though the deposit difference is just 5%.
A Worked Example
LMI premiums at 90% LVR can represent a substantial four-to-five figure sum before state insurance duty. If capitalised, interest compounds on that premium over the loan term, adding further cost. Use Ratebuster’s LMI calculator for indicative figures at your specific LVR.
The indicative formula used by LMI calculators is:
Indicative LMI cost = Loan Amount x Assumption Rate + State Insurance Duty
Use Ratebuster’s LMI calculator to model scenarios across 80%, 85%, 90%, and 95% LVR bands before speaking to a lender.
The LVR Tipping Point
On a $650,000 property, moving from a 10% deposit to a 15% deposit drops the LVR from 90% to 85% and the LMI premium drops meaningfully, the difference can be significant enough to make saving the extra deposit worthwhile. If you are close to an LVR threshold, saving to cross it may cost less than the premium difference.
The First Home Buyers Scheme Australia guide explains how a 5% deposit under the First Home Guarantee can eliminate LMI entirely for eligible buyers, which changes the calculation completely.
LMI Now vs. Waiting to Save 20%: The Real Trade-Off
Knowing what LMI costs is only half the equation. The other half is what it costs you to avoid it by waiting.
The standard advice to “just save a 20% deposit” sounds prudent, but it ignores a real financial variable: the opportunity cost of staying out of the market. In many periods, Australian property values have risen faster than wages, meaning the finish line moves while you’re still running toward it.
As an illustration only (actual growth rates vary by market and location): if a $650,000 property appreciates meaningfully over 18 months while you save, the required 20% deposit rises in step, and rent paid during that period is a real additional cost. The right question is not “is LMI expensive?” It is: “is the LMI premium less than the likely capital gain plus rent paid during the delay?” In a rising market, the answer frequently favours buying now and absorbing the LMI cost.
This maths does reverse in flat or falling markets. If prices are stagnant or declining, waiting carries less penalty and the break-even calculation shifts toward delaying.
One further timing consideration applies to eligible first home buyers: in some states, first home buyer stamp duty concessions are linked to purchase price thresholds, check current state government guidance, as these can change.
The Four Pathways to Avoid or Minimise LMI
Once you know the break-even case for entering the market now, the next question is practical: which structure lets you actually do it with less than 20% deposit?
There are four distinct pathways, and each suits a different borrower profile.
- Guarantor loans use a family member’s property equity to reduce the effective LVR, eliminating LMI even with no cash deposit.
- Government guarantee schemes allow eligible buyers to purchase with a small deposit, with the federal government guaranteeing the shortfall so no LMI is charged. Since the Home Guarantee Scheme launched, the share of first home buyers using LMI has fallen from roughly 3 in 10 to just 1 in 10. A full breakdown of available grants and federal schemes is at First Home Buyers Grant: Every Grant and Scheme Available in Australia.
- Professional waiver packages allow borrowers in specific licensed occupations, typically doctors, dentists, lawyers, and pharmacists, to borrow above 80% LVR without an LMI premium.
- Specialist high-LVR lenders offer non-standard risk structures where mortgage insurance cost is embedded differently or absorbed by the lender.
The right pathway depends on your family situation, occupation, income, and purchase timeline, not a universal ranking. Critically, some borrowers qualify for more than one simultaneously; an income-eligible first home buyer with a willing guarantor parent has genuine options to compare before committing.
Check eligibility across all four before approaching any lender. Each credit enquiry is recorded on your file, and unnecessary applications carry a real cost.
Pathway 1: Guarantor Loans (How to Borrow With Zero Deposit)
Guarantor loans are the first pathway, and for borrowers with supportive parents who own property, they are also the most powerful: they can eliminate both the deposit requirement and LMI entirely.
The mechanism works by having a family member, most commonly a parent, pledge equity in their own property as additional security for your loan. This reduces the effective LVR below 80% from the lender’s perspective, even if you contribute zero cash deposit. A guarantor can save borrowers a substantial amount in LMI costs depending on purchase price and deposit size.
The guarantee covers the shortfall, not the full loan. Lenders typically limit the guarantee to the gap between your deposit and a safe 80% LVR, rather than the entire loan balance. This caps the guarantor’s legal exposure, though it does not eliminate it. If you default and the property sale falls short of covering the debt, the lender can pursue the guarantor for the guaranteed portion, which could mean a forced sale of their home.
Not every family member will qualify. Lenders assess the guarantor’s property value, existing mortgage balance, age, income, and overall financial position. Most lenders restrict guarantors to immediate family members. Independent legal advice before signing is mandatory with most lenders, and financial advice is strongly recommended for all parties.
The guarantee is not permanent. Once your loan balance falls below 80% of the property value, through repayments or capital growth, you can apply to release the guarantee. Many borrowers reach that threshold within a few years, ending the guarantor’s ongoing liability.
If you are buying in Queensland, it is also worth checking whether you qualify for the Queensland First Home Owner Grant before finalising your structure, as stacking a $30,000 grant with a guarantor loan can materially reduce your total debt from day one.
Pathway 2: Government Guarantee Schemes Including the First Home Guarantee
If no family member is in a position to act as guarantor, government schemes offer an equally powerful LMI workaround, and for many first home buyers they are the simpler path.
First Home Guarantee allows eligible buyers to purchase with a 5% deposit, with the federal government guaranteeing up to 15% of the loan to the participating lender. That guarantee closes the gap to 80% LVR, eliminating LMI entirely. As of October 2025, the scheme removed income caps and lifted property price caps across all states and territories, and places are now uncapped with no waiting list.
Family Home Guarantee targets eligible single parents or guardians with at least one dependent. A 2% deposit is sufficient, and participants are not required to be first home buyers, meaning someone who has previously owned property can still qualify. This is significant for a cohort that often faces real challenges accumulating a larger deposit alongside sole-income household costs.
Help to Buy operates differently. Rather than guaranteeing a loan, the federal government co-purchases up to 30% of an existing home or 40% of a new build alongside the buyer. The smaller loan size keeps the LVR below the LMI threshold. Applications opened in December 2025.
All three schemes share core restrictions: the property must be owner-occupied (investors are excluded), and property price caps vary by state and territory. First home buyers using any of these schemes should also check their stamp duty position using this state-by-state guide, as concessions interact with scheme eligibility in ways that affect total upfront costs.
Pathway 3: LMI Waivers for Professionals
If you don’t qualify for a government scheme, or you’re not a first home buyer, a professional waiver may eliminate LMI entirely without involving a third party or competing for limited annual places.
Several major and non-bank lenders offer LMI waivers to borrowers in specific high-income professions. Lender eligibility criteria for professional waivers vary, the eligible professions, minimum income, and maximum LVR differ across lenders. Check the specific criteria with each lender before applying, and confirm your registration status meets their requirements.
Lenders in this space consider these professions lower default risk, but criteria differ. The waiver is extended because these occupations typically carry low unemployment risk, strong income stability, and high future earning potential, so lenders absorb the LMI risk rather than insuring against it.
The waiver covers the LMI premium only. Interest rates, serviceability assessment, and loan conditions remain standard, so borrowers still need to demonstrate they can service the loan on their income. Comparing current rates and conditions across lenders, including how Westpac home loan rates and eligibility criteria compare to non-bank alternatives, is a useful starting point.
Pathway 4: Specialist Lenders With Non-Standard LMI Structures
If you don’t qualify as a professional eligible for a waiver, a fourth option exists: specialist and non-bank lenders that handle mortgage risk differently from the major banks.
Some of these lenders operate self-insured products, meaning the lender absorbs the default risk internally rather than passing it to a separate mortgage insurer. In practice, this means there is no distinct LMI premium line item on your loan documents. Instead, the cost of that risk is priced into the interest rate itself. Your total cost over the life of the loan may be comparable, but the cash flow profile changes significantly: you pay nothing extra at settlement, which can matter when upfront costs are already stretched.
There is a trade-off worth understanding. Because risk is embedded in the rate rather than charged once, a borrower who repays the loan quickly or refinances early may pay more in aggregate than they would have with a standard upfront LMI premium.
These lenders also apply stricter property filters. LVR limits may vary by property type and location; confirm that your specific property is acceptable to the lender before progressing.
Non-bank lenders in this space include credit unions, building societies, and specialist mortgage managers. Conditions and rates vary significantly between them, so treating them as a uniform category is a mistake. Comparing them directly against major bank LMI structures, rather than assuming one is cheaper, is the only way to know.
Using RateBuster’s comparison tables to see how non-bank and specialist lenders stack up against major banks on low-deposit home loans surfaces options that a single lender’s website will never show you.
Genuine Savings: What Lenders Require Before They Will Approve a Low Deposit Loan
Qualifying for any low-deposit pathway still depends on satisfying one additional requirement that catches many borrowers off guard: the genuine savings test.
For low-deposit loans, lenders commonly require borrowers to demonstrate genuine savings accumulated over a minimum period (typically several months, the exact requirement varies by lender) through their own efforts. It is not enough to have the money sitting in your account at application time; lenders want to see it arrive and stay there over time.
What qualifies and what may not
Regular savings account deposits and term deposits held for the required period typically qualify. What qualifies as genuine savings varies by lender; gifts, inheritances, and government scheme withdrawals may or may not count, check the specific lender’s policy.
Why lenders apply this test
Genuine savings requirements serve as a proxy for financial discipline. A borrower who has consistently set aside money each month is statistically more likely to manage mortgage repayments reliably after settlement. Lenders are assessing behaviour, not just balance.
The guarantor exception
Borrowers using a guarantor loan may be able to sidestep the genuine savings requirement entirely, because the guarantor’s equity substitutes for the deposit assessment. Lender policies differ on this, so confirm the position with your chosen lender before applying.
Practical preparation
Start accumulating and documenting savings well before you plan to apply. Avoid making large, irregular transfers into the savings account close to application time. These attract scrutiny and can prompt a lender to discount or exclude those funds from their genuine savings calculation.
Your Real Upfront Cash Requirement Is Higher Than Your Deposit Alone
Qualifying your genuine savings is one piece of the readiness puzzle. The other is knowing exactly how much cash you need at settlement, because the deposit figure alone will leave you short.
Stamp duty is the single largest additional cost for most buyers, and it is calculated on the purchase price, not on your deposit. For a $650,000 purchase in Victoria, stamp duty for a non-first-home buyer is a substantial five-figure cost, use your state’s revenue office calculator for the exact current figure. First home buyer concessions can reduce or eliminate this in some states, but eligibility is tied to purchase price thresholds and owner-occupier requirements that vary by jurisdiction.
Beyond stamp duty, budget separately for conveyancing (typically a few thousand dollars), building and pest inspections, and lender fees, as these add meaningfully to upfront cash requirements beyond the deposit. Obtain quotes from conveyancers in your state for current pricing.
Use a total purchase cost calculator before fixing on a purchase price. A deposit calculator only tells part of the story.
Some lenders permit stamp duty to be added to the loan balance, but this raises the LVR, which in turn increases the LMI premium and the total borrowing cost. It trades an upfront cash problem for a more expensive loan over time.
Choosing the Right Pathway: A Quick Decision Framework
Once you have a clear picture of your total upfront cash requirement, the next step is matching your situation to the pathway most likely to eliminate or reduce LMI.
Use this as a quick filter:
You have a supportive parent with usable property equity. Consider a guarantor loan, which can eliminate LMI entirely and remove the need to accumulate a 20% deposit. Confirm the guarantor has no significant financial vulnerability before proceeding, as their property secures part of your loan.
You are a first home buyer purchasing an owner-occupied property. Check First Home Guarantee eligibility before anything else. Full scheme detail is in the Pathway 2 section above. If you qualify, it is the lower-friction starting point.
You work in an eligible profession and earn above the lender’s income threshold. Compare a professional waiver directly against the First Home Guarantee. The waiver has no annual place limits and no property price caps imposed by the scheme, but eligibility criteria differ across lenders, so checking multiple lenders is worthwhile. If you qualify for both, run the numbers on each before committing.
None of the above apply. Compare specialist and non-bank lenders offering high-LVR products. Pay close attention to whether the risk cost is charged as a separate fee or embedded in the interest rate, as this changes which total cost comparison is relevant.
LMI is unavoidable in your scenario. The remaining decision is upfront payment versus capitalisation. Paying upfront costs more at settlement but less overall. Capitalising preserves cash now but adds interest on the premium across the full loan term. Model both against your current cash position before deciding.
How to Compare Low Deposit Home Loans Effectively
Once you have identified your pathway, effective comparison is what converts that decision into the best available loan.
Interest rate alone does not determine the true cost of a low deposit home loan. The comparison rate, which folds in most standard fees, is a better starting point, but it still excludes LMI premiums and the risk fees some specialist lenders embed in their products. A complete cost picture requires adding the LMI premium, any non-standard lender fees, and state insurance duty to the interest cost before drawing conclusions.
Always compare lenders at the same LVR band. A lender advertising a lower rate at 90% LVR is not automatically cheaper than a competitor offering a higher rate with a lower LMI premium at the same LVR. Without running a total cost calculation across the full loan term, the comparison is meaningless. The numbers that matter are: interest paid over the loan term, plus upfront and capitalised LMI, plus lender fees.
Ratebuster’s comparison tables allow filtering by LVR, lender type, and loan features, making it straightforward to see which lenders are actively competing for low deposit home loan customers rather than manually checking each lender’s website individually.
If you are eligible for the First Home Guarantee, verify lender participation before shortlisting. Not every lender is an approved participating lender under the scheme, so filtering for scheme-approved lenders early avoids shortlisting options you cannot actually use.
Do not submit pre-approval applications to multiple lenders at once. Each application triggers a credit enquiry recorded on your file. Multiple hard enquiries within a short period can signal financial stress to lenders reviewing your application, undermining the very approval you are seeking.
Key Takeaways: A Practical Starting Point for Sub-20% Deposit Borrowers
Once you have done the comparison work, the core principles behind every decision in this guide stay consistent regardless of which pathway suits you best.
LMI is a calculable cost, not an automatic barrier. The premium increases with LVR and loan size, allowing you to calculate, minimise, or even eliminate the cost before approaching a lender.
You can explore four pathways to reduce or avoid LMI: guarantor loans, government guarantee schemes, professional waivers, and specialist lenders. The sections above explain each option in detail, helping you choose the pathway that best suits your family situation, occupation, and timeline.
Comparing options across lenders gives you the clearest picture. Ratebuster lets you filter low deposit home loan products by LVR, lender type, and scheme participation, so you can see current rates, LMI costs, and First Home Guarantee eligibility side by side before making any credit application.
Frequently Asked Questions
Do I absolutely need a 20% deposit to buy a home in Australia?
No. The 20% deposit threshold is simply the point where Lenders Mortgage Insurance (LMI) disappears. A 20% deposit is not a hard requirement—it’s based on your loan-to-value ratio (LVR). You can borrow with deposits as low as 5% through the First Home Guarantee scheme or even 2% through the Family Home Guarantee if you’re an eligible single parent. Many borrowers successfully purchase with significantly less than 20% down by understanding and planning around LMI costs.
What exactly is Lenders Mortgage Insurance and who does it protect?
Lenders Mortgage Insurance (LMI) exists to protect the lender, not the borrower. If you default and the property sells for less than your outstanding loan balance, LMI covers the lender’s shortfall. However, you pay the premium while receiving none of the protection. LMI applies when your LVR exceeds 80% (meaning your deposit is less than 20% of the purchase price). Lenders calculate the premium as a percentage of the loan amount, with costs increasing at higher LVR bands. For example, borrowing at 95% LVR costs substantially more than borrowing at 85% LVR on the same property.
Is it better to pay LMI upfront at settlement or capitalize it into my loan?
Both options have trade-offs. Paying LMI upfront at settlement keeps the total cost contained but requires more cash at the point of purchase. Capitalizing it into your loan balance spreads the cash impact, preserving money now, but you’ll pay interest on that premium for the entire loan term—which can add meaningfully to its total cost over time. The best choice depends on your current cash position and financial situation. Use a home loan repayment calculator to model both scenarios before deciding.
What are the four main pathways to avoid or minimize LMI?
The four pathways are: (1) Guarantor loans—using a family member’s property equity to reduce your effective LVR, potentially eliminating LMI entirely with no cash deposit; (2) Government guarantee schemes like the First Home Guarantee (5% deposit) or Family Home Guarantee (2% deposit for eligible single parents), where the government guarantees the shortfall; (3) Professional waivers for specific licensed occupations like doctors, dentists, lawyers, and pharmacists, allowing borrowing above 80% LVR without LMI; and (4) Specialist high-LVR lenders that embed mortgage insurance costs differently or absorb them in the interest rate. The right pathway depends on your family situation, occupation, income, and timeline.
What is the ‘genuine savings’ requirement and how can it affect my low-deposit loan application?
For low-deposit loans, lenders typically require you to demonstrate genuine savings accumulated over a minimum period (usually several months) through your own efforts. It’s not enough to have the money in your account at application time—lenders want to see it arrive and remain there over time, as this demonstrates financial discipline and predicts your reliability with mortgage repayments. Regular savings and term deposits typically qualify, but gifts, inheritances, and government scheme withdrawals may not, depending on the lender’s policy. Borrowers using a guarantor loan may be able to sidestep this requirement entirely, as the guarantor’s equity substitutes for the deposit assessment. Start accumulating and documenting savings well before applying, and avoid large irregular transfers close to application time, as these attract scrutiny.
