Low deposit home loans in Australia: what lenders may accept and the trade-offs

Buying with a deposit below 20% is common, and it is not automatically a bad decision. What it does change is the shape of your costs: you borrow a larger share of the property's value, and that can trigger an extra charge most full-deposit buyers never see. This guide explains how lenders frame a "low deposit", what lenders mortgage insurance (LMI) is and who it actually protects, how it gets paid, and the trade-offs worth comparing before you commit.

What "low deposit" means to a lender

Lenders usually express your deposit as a loan-to-value ratio, or LVR: the loan amount as a percentage of the property's value. A 20% deposit means an LVR of 80%. A 10% deposit means an LVR of 90%.

That percentage matters because, as MoneySmart puts it, "if your LVR is above 80%, you may need to pay lenders mortgage insurance" (moneysmart.gov.au). Below that mark, you may avoid extra charges like LMI; above it, the cost is likely to form part of your decision.

Two practical points follow from this:

• The 80% line is about the loan relative to the property value, not a dollar figure. The same deposit can produce a very different LVR depending on the price of the property you buy.
• Your LVR is set at the value the lender places on the property, which may differ from the price you agreed with the seller. That gap is worth asking about early, because it can move you across the 80% line in either direction.

Lenders mortgage insurance: what it is, and who it covers

LMI is widely misunderstood, so start with the definition. MoneySmart's glossary states that "lenders mortgage insurance (LMI) protects a credit provider if borrowers are unable to repay their loan" (moneysmart.gov.au). It is insurance for the lender's benefit, not cover for you if you lose your job, get sick, or fall behind on repayments.

MoneySmart also describes LMI as "usually a one-off cost to a home loan borrower, payable when the amount borrowed exceeds 80% of the value of the property" (moneysmart.gov.au). So it is typically a single charge tied to this loan, not an ongoing premium, and it is triggered by the size of the loan relative to the property.

The practical interpretation: LMI is the price of the lender taking on a loan with less of your own money at risk. It lets some borrowers buy sooner than saving a full 20% would allow. It does not reduce your debt, and it does not protect your home or your repayments.

How the cost is paid

MoneySmart notes that "you pay the lenders mortgage insurance at settlement, or your lender adds it to your loan" (moneysmart.gov.au). Both paths have consequences:

• Paid at settlement. You need the funds available on top of your deposit and other upfront costs such as stamp duty, registration and conveyancing. This is where a tight budget can hurt: a deposit that looked sufficient may not be once LMI is added.
• Added to the loan. You don't need the cash upfront, but the amount becomes part of what you borrow. You then carry it for the life of the loan rather than settling it on day one.

Whichever applies, ask the lender to show the cost as a standalone figure before you sign, and ask what it does to both your upfront cash requirement and your loan amount.

Deposit size is one input, not the whole assessment

MoneySmart is explicit that "when you apply for a home loan, lenders look at more than just your deposit" (moneysmart.gov.au). Expect assessment to cover your income and employment stability, your existing debts and commitments, your repayment history, your living expenses, and the property itself.

This cuts both ways for low-deposit buyers. A smaller deposit is not automatically disqualifying if the rest of your position is strong. Equally, a larger deposit does not fix a serviceability problem. Treat the deposit as one lever among several rather than the single gate.

The core trade-off: buy sooner or save longer

There is no universal right answer, because the comparison depends on prices, rents and your own circumstances — all of which you need to check for yourself. What you can do is lay the trade-off out clearly.

	Buy now with a smaller deposit	Wait and save a larger deposit
Upfront costs	LMI may be payable if LVR is above 80%	May avoid extra charges such as LMI
Cash needed at settlement	Lower deposit, but LMI and other costs still payable	Higher deposit, potentially no LMI
Loan size	Larger, and LMI may be added to the loan	Smaller
Timing	Buy sooner, keep renting for less time	Buy later, keep renting or living as you are for longer
Assessment	Deposit is only one factor lenders consider	Same factors apply; a bigger deposit alone may not change the outcome

The honest framing: the question is not "is LMI bad" but whether paying it now is worth more to you than the time and rent involved in waiting. Nobody can answer that for you with a generic rule, and no one should promise you a saving either way.

Options that may reduce or avoid LMI — verify each one

Several routes are commonly discussed for buying with less than a 20% deposit. Treat the following as questions to put to a lender or broker, not as established facts about what any particular lender will do:

• A larger deposit from any source. Including savings, and in some cases family contributions. Ask what evidence the lender requires and whether gifted funds change anything.
• A guarantor. Some loans allow a family member to guarantee part of the loan. Ask whether the lender offers this, what the guarantor's liability actually is, and when it ends.
• Government schemes. Programs that support buyers with smaller deposits may exist at the time you buy, with eligibility rules, property price caps and limited places. Confirm current details with the relevant official government source rather than a lender's marketing, and check whether you qualify before you rely on it.
• A cheaper property. Lowering the purchase price lowers the loan and can lower the LVR. It is the least-discussed option and sometimes the most effective.

Questions to take to a lender

• What LVR does my deposit produce on this property, using your valuation?
• Is LMI payable, and what is the exact dollar amount?
• Can I pay it at settlement, or is it added to the loan — and what does the loan become in each case?
• If it is added to the loan, what is the new loan amount and repayment?
• What other upfront costs apply, and what total cash do I need on settlement day?
• If my valuation comes in lower than the purchase price, how does that change the LVR and the LMI cost?
• Do you offer any guarantor or scheme-supported options, and what are the eligibility conditions?
• What happens if I want to refinance later — does any part of the LMI cost come back to me?

Next steps

Work out your LVR on the property price range you are actually looking at, then ask two or three lenders for the LMI figure in writing alongside the loan amount and repayment. Comparing those numbers side by side is more useful than comparing advertised rates alone, because the LMI cost and how it is paid can differ substantially between lenders.

If you want to see what a smaller deposit might look like against your own numbers, you can start with our home loan match tool or browse the home loans guide.

General information only

This article is general information about how low-deposit lending works in Australia. It is not legal, tax, credit or financial advice, and it does not take your personal circumstances, objectives or financial situation into account. LMI costs, lender policies and government scheme settings can change, and whether a lender will accept a particular deposit is a decision only that lender can make. Confirm all figures, eligibility criteria and costs with the lender and with official government sources before you commit to a loan.