First Home Buyers
What is LMI, and how to legally avoid it
11 min read · By Daniel Lagden · 24 June 2026
The short version
- LMI is a one-off insurance premium that protects the lender if you default, not you.
- It usually applies when you borrow more than 80% of a property's value.
- On a $700,000 purchase with a 5% deposit, LMI can exceed $25,000.
- Government guarantee schemes, a larger deposit, a guarantor, or your profession can all reduce or remove it.
Lenders Mortgage Insurance is a one off premium you pay so that your lender is protected if you default and the property sells for less than you owe. The name is the whole problem: it sounds like cover for you, and it is not. You pay it, the bank is insured, and you get nothing back if things go wrong. It is also, frequently, the thing that lets you buy years earlier than you otherwise could.
Quick summary: LMI generally applies when you borrow more than 80 per cent of a property's value. The premium rises steeply as your deposit shrinks and it is usually added to your loan, so you pay interest on it for the life of the mortgage. There are four legitimate ways to avoid it and one common way to reduce it that most buyers never consider.
When does LMI actually apply?
The trigger is your loan to value ratio, which is the loan divided by the lender's valuation of the property. Above 80 per cent, expect mortgage insurance. At or below it, standard LMI does not apply. Note that the ratio uses the valuation rather than the purchase price, which matters if a valuation comes in short: a deal that looked like 80 per cent on the contract price can quietly become an LMI deal.
The premium is not linear. It rises sharply as the deposit falls, because the lender is exposed to more risk, and it also scales with the loan size. The same loan to value ratio costs considerably more on a large loan than a small one.
| Deposit | Loan to value ratio | LMI position |
|---|---|---|
| 20% or more | 80% or below | Not payable |
| 15% | 85% | Payable, modest |
| 10% | 90% | Payable, significantly higher |
| 5% | 95% | Payable, highest band |
Why does a capitalised premium cost so much more than it looks?
Because it is almost always added on top of your loan rather than paid in cash, which means you borrow it and pay interest on it. A premium is a one off charge, but a one off charge financed over thirty years and never paid down is a very different number by the end.
There is a simple way to blunt this. If you have to pay the premium, treat the capitalised amount as a target for extra repayments in the first few years rather than letting it sit in the balance for three decades. Paying it down early converts it back into something close to a genuine one off cost.
What are the legitimate ways to avoid it?
- Save a 20 per cent deposit. The clean route, and on Gold Coast prices often the slowest one. Worth comparing against what the market does while you save.
- Use a government guarantee scheme. Eligible first home buyers may buy with as little as 5 per cent and no LMI, because part of the loan is guaranteed instead. Places, price caps and eligibility conditions apply and change.
- Bring in a guarantor. A family member offers equity in their property as additional security, lifting your effective deposit past 20 per cent. A real legal commitment for them, and it needs a clear plan for release.
- Use a profession based waiver. Some lenders waive LMI entirely for particular occupations at higher loan to value ratios, including a range of medical and other professional roles.
And the option most buyers never think of: buy slightly differently rather than saving longer. Premiums step at bands rather than sliding smoothly, so nudging your deposit or your purchase price by a small amount can drop you into a cheaper band and save thousands. It is worth asking where the nearest band sits before you assume you need another year of saving.
Is a waiver always better than paying?
Not automatically, and this is where advice tends to get lazy. A guarantor arrangement avoids the premium but puts a family member's property at risk and constrains their own borrowing while it is in place. A government scheme avoids the premium but comes with price caps that may push you into a different suburb or property type than you actually wanted.
Paying the premium buys you a clean, unencumbered purchase with no third party involved and no eligibility conditions to satisfy. Sometimes that is worth the money. The right comparison is not premium against no premium, it is the full set of consequences of each route.
Can you get any of it back?
Generally no. Some insurers offer a partial refund if the loan is discharged very early in its life, typically within the first year or two, but the windows are short and the amounts modest. Do not plan around a refund. Treat the premium as spent at settlement.
One related point that does matter: LMI is generally not portable. If you refinance to another lender while still above 80 per cent, you may be charged a fresh premium by the new lender's insurer. That is a real cost of switching and it belongs in any refinance calculation done at a high loan to value ratio.
How does LMI interact with a low valuation?
This is the scenario that turns a planned no LMI purchase into an LMI one. Your loan to value ratio is calculated on the lender's valuation, not on what you agreed to pay. If you buy at $800,000 with a $160,000 deposit, you are at exactly 80 per cent on the contract price. If the valuation comes back at $770,000, the lender will lend against that figure and your ratio moves above 80 per cent, so a premium now applies on a purchase you had structured specifically to avoid one.
There are two practical protections. The first is not sitting exactly on the threshold: a small buffer below 80 per cent absorbs a modest valuation variance. The second is understanding which property types carry valuation risk, which is mostly off the plan purchases, unusual dwellings, and anything in a market with few recent comparable sales.
Is a government scheme always better than paying the premium?
Not always, and the reason is the caps. A guarantee scheme removes the premium but imposes a property price ceiling and eligibility conditions. If the ceiling pushes you into a suburb or property type you did not want, you have saved a premium and bought the wrong thing, which is a poor trade.
| Route | Premium avoided | What it costs you instead |
|---|---|---|
| Pay the premium | No | Money, but total freedom of choice |
| Guarantee scheme | Yes | Price caps, eligibility conditions, limited places |
| Guarantor | Yes | A family member's equity is at risk |
| Profession waiver | Yes | Nothing, if you qualify. Eligibility is narrow |
| Save to 20% | Yes | Time, and whatever the market does meanwhile |
The profession based waiver is the only route on that table with no meaningful downside, which is why it is worth checking first if there is any chance your occupation qualifies. Everything else is a genuine trade off rather than a free win.
What about a guarantor, and how do they get out?
A guarantor arrangement is usually structured as a limited guarantee, which means the family member is liable only for a specific portion of the loan rather than the whole thing. That portion is typically the gap between your deposit and 20 per cent, which keeps their exposure defined rather than open ended.
The release is the part that should be planned from the start rather than left vague. The guarantee can generally be removed once your loan falls below 80 per cent of the property's value, which happens through repayments, through growth in the property's value, or both. Ask for that release condition to be spelled out at the beginning, and revisit it whenever the property is likely to have gained value.
One thing guarantors are rarely told: while the guarantee is in place it can reduce their own borrowing capacity, because the contingent liability is counted against them. If they are planning to borrow for anything themselves in the next few years, that belongs in the conversation before they sign.
Does LMI ever come off?
The premium does not get refunded once you pass 80 per cent, because it was a one off charge covering the whole loan rather than an ongoing fee. This is a common misunderstanding: people expect it to fall away like an insurance policy when the ratio improves, and it does not.
What does change is your options. Once you are comfortably below 80 per cent you can refinance without triggering a new premium, which opens the whole market to you and is often when the sharpest pricing becomes available. If you bought with a small deposit, that threshold is a milestone worth tracking rather than discovering years later.
General information only, current as at August 2026. Premiums vary by insurer, lender, loan size and loan to value ratio, and scheme eligibility and caps change. The figures here describe direction and scale rather than quoting prices. This is not credit advice.
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Frequently asked questions
Is LMI the same as mortgage protection insurance?
No, and they are easy to confuse. LMI protects the lender if you default. Mortgage protection insurance is a separate, optional product that covers you if you cannot make repayments due to illness, injury or job loss.
Can I pay LMI upfront instead of adding it to the loan?
Usually yes, and it is cheaper overall because you avoid paying interest on it. Most buyers capitalise it simply because cash is tight at settlement, not because it is the better option.
Does LMI apply on an investment property?
Yes. The trigger is the loan to value ratio, not whether you live in the property. Investors above 80 per cent should expect it, and some lenders apply tighter limits on investment lending.
Will I pay LMI again if I refinance?
Possibly. LMI is generally not transferable between lenders, so refinancing while still above 80 per cent can trigger a fresh premium. That cost belongs in your refinance comparison.
Can I get LMI refunded if I sell quickly?
Sometimes a partial refund is available if the loan is discharged within a short window, often one to two years, but the amounts are modest. It is not something to plan around.
Does a valuation coming in low affect my LMI?
Yes. The ratio is calculated on the lender's valuation, not your purchase price, so a low valuation can push you above 80 per cent and into a premium you had not budgeted for.
Which professions can get LMI waived?
It varies by lender and changes, but a range of medical and other professional occupations are commonly included. It is worth checking against your specific role rather than assuming either way.
