What is Lenders Mortgage Insurance (LMI) and how does it work?

Lenders Mortgage Insurance is a policy that protects the lender — not you — if you default on your home loan and the lender can’t recover the full amount owing after selling the property. It’s usually required when you’re borrowing more than 80% of the property’s value, and you, the borrower, pay the premium even though the lender is who’s covered. Moneysmart’s glossary confirms both points: LMI is required above the 80% LVR benchmark, and it protects the lender, not the borrower or any guarantor.

LVR, or loan-to-value ratio, is the amount you’re borrowing expressed as a percentage of the property’s value.

LVR = (loan amount ÷ property value) × 100

A $720,000 loan on an $800,000 property is a 90% LVR, for example. LMI is usually payable once your LVR goes above 80%, which is another way of saying once your deposit (plus any costs you’re funding from savings) is less than 20% of the property’s value.

Who does LMI actually protect?

This is the single most misunderstood thing about LMI: it is not insurance for you. It doesn’t pay out your loan if you lose your job, it doesn’t protect a guarantor who has put up equity for you, and it isn’t the same product as mortgage protection or income protection insurance, which are separate policies a borrower can choose to take out for their own benefit. LMI exists so the lender can extend a loan at a higher LVR than it otherwise would, with an insurer standing behind the additional risk that entails.

That distinction matters because it changes what LMI actually does for you as a buyer: it doesn’t remove risk from your situation, it removes a barrier the lender would otherwise have to a higher-LVR loan. The benefit to you is indirect — a lender is more willing to approve a loan with a smaller deposit because the LMI policy is in place, not because you personally are insured against anything.

When is LMI required?

As at July 2026, LMI is usually payable once your LVR is above 80% — in practice, once your deposit is below roughly 20% of the property’s value. There are ways around it. Since the 5% Deposit Scheme’s expansion on 1 October 2025, eligible first home buyers can borrow with as little as a 5% deposit (2% for single parents or legal guardians) through a government guarantee with no LMI at all, subject to the scheme’s price caps and other conditions.

A guarantor arrangement, secured against a family member’s property, is a separate route some buyers use to reduce or avoid LMI. This article doesn’t rank these options against each other — which one suits you depends on your circumstances and is worth working through with a licensed mortgage broker.

How much does LMI cost?

There’s no single published figure or table that applies across the market — the premium is set by the LMI insurer (there are only a small number operating in Australia) based on your LVR, the size of the loan, and the lender you’re borrowing through, and it can vary meaningfully between one buyer’s circumstances and another’s. No government or consumer body publishes a standard premium range, so treat any specific dollar figure or percentage you see quoted online as an example, not a quote for your situation. Helia, one of the LMI insurers active in the Australian market, publishes a free online LMI fee estimator that gives an indicative figure once you enter your own loan details — a lender or mortgage broker can also give you a personalised quote before you commit to anything.

Is LMI a one-off cost?

Generally, yes — LMI is usually a single premium charged once, at settlement, rather than an ongoing fee you pay every year. Most lenders let you either pay it upfront in cash or capitalise it into your loan, meaning the premium is added to what you borrow rather than paid separately. Capitalising LMI means you pay interest on the premium itself for the life of the loan, so it costs more in total than paying it upfront — but it also means you don’t need extra cash on hand at settlement to cover it.

Should you pay LMI or wait until you have a bigger deposit?

There’s no single right answer here — it depends on factors that only make sense in the context of your own situation: how quickly property prices are moving in the market you’re buying into versus how quickly you can save an additional few percentage points of deposit, what a capitalised premium would add to your specific loan, and whether a no-LMI pathway like the 5% Deposit Scheme is available to you. A licensed mortgage broker can model the trade-off against a real loan amount and lender, which a general guide like this one can’t do for you.

For the deposit-size side of this question, see our guide to how much deposit you need for a first home in Australia, which covers the 20% benchmark and the alternative deposit paths in full. For how the no-LMI 5% Deposit Scheme itself works, see our guides to how the 5% Deposit Scheme works and whether you qualify for the First Home Guarantee.