Lenders mortgage insurance is the most misunderstood cost in home buying, starting with its name. It is insurance the lender takes out to protect itself if you default and the sale of the property doesn't cover the debt — and the premium is passed to you. If the insurer pays the bank out, the insurer can still pursue you for the shortfall. You are paying for a product that gives you nothing except permission to borrow with a smaller deposit.
That permission has real value — for many buyers it's the difference between buying now and saving for three more years — but you should price it accurately before accepting it.
How the premium is calculated
LMI is priced on two inputs: your loan-to-value ratio (LVR) and your loan size, with a loading for investors. The premium is a percentage of the loan, and the percentage climbs steeply — not linearly — as LVR rises:
- 80% LVR or below: no LMI. This is the cliff everything is measured against.
- 80–85%: modest premiums, often under 1% of the loan.
- 85–90%: the curve steepens — typically 1–2%+ of the loan.
- 90–95%: the expensive zone — premiums of 2–4%+ of the loan are common.
On an $800,000 purchase with a 10% deposit ($720,000 loan at 90% LVR), the premium commonly lands in the $12,000–$18,000 range depending on lender and insurer. Most states also charge stamp duty on the LMI premium itself — roughly 9–10% in the larger states — a tax on an insurance you don't benefit from. Most borrowers capitalise the premium into the loan, which means you then pay interest on it for 30 years: a $15,000 premium capitalised at 6% costs about $900 a year in interest before you've repaid a cent of it.
Run your exact price, deposit and state through the LMI calculator — the bands above are indicative and lenders' schedules differ.
The double penalty of a small deposit
Notice what happens between an 88% and a 95% loan: you borrow more, and you pay a much higher LMI percentage on that larger loan. The dollars compound against you from both directions. This is why a few months of extra saving near a band boundary has an outsized payoff: moving from 91% to 89% LVR can cut the premium by thousands — a guaranteed, tax-free return on the extra deposit that few investments can match. The deposit savings calculator shows the timeline; check it against the band you're in.
Five legitimate ways to avoid or reduce LMI
1. The Home Guarantee Scheme. The federal First Home Guarantee lets eligible first home buyers purchase with as little as 5% deposit while the government guarantees the gap to 80% — no LMI at all. Since the 2025 expansion the scheme has no income caps and no place limits, though property price caps apply by region. If you're a first home buyer, check this before anything else; it's the single largest LMI saving available.
2. A family guarantor. A parent offering their own property as additional security can bring the effective LVR to 80%, eliminating LMI. The guarantee can usually be released once you've paid the loan down. The risk transfers to the guarantor's home, so treat it as the serious legal arrangement it is.
3. Professional waivers. Many lenders waive LMI up to 90–95% LVR for professions they consider low-risk — doctors, dentists, some lawyers, accountants and engineers, subject to income floors and professional body membership. If you qualify, this is free money; brokers know which lenders run which lists.
4. Lender specials. Some lenders periodically offer LMI for $1 or reduced premiums at 85% LVR for owner-occupiers as an acquisition tactic. These offers are genuine but compare the rate too — a discounted premium attached to a rate 0.3% higher is not a discount.
5. Just reach 80% — or close to it. Not always possible in a rising market, and waiting has its own cost if prices outrun your saving rate. This is a genuine trade-off, not a moral failing either way: compare the LMI premium against what the market you're buying into did over your realistic saving horizon.
When paying LMI is the right call
If prices in your target area are rising faster than you can save the deposit gap, LMI is the fee that stops the goalposts moving. Paying $15,000 to buy a year earlier in a market moving 5% annually on an $800,000 property is arithmetic that can favour the premium. The mistake isn't paying LMI — it's paying it unknowingly, capitalised, duty-loaded, at a 94% LVR when three more months of saving would have dropped a band.
Price it, compare it against the schemes above, and make it a decision instead of a surprise.
Premium bands are indicative of the Australian LMI market as at July 2026; each insurer's rate card differs. First Home Guarantee settings per Housing Australia. General information, not financial or credit advice.