Calculator
Lenders Mortgage Insurance (LMI) Calculator
LMI Calculator
Loan Assumptions
How The Premium Is Paid
Most states levy stamp duty on the LMI premium itself — typically 9–11%; adjust for your state.
Estimated LMI Premium
$15,660
LMI Analysis
A 90.0% LVR loan of $675,000 sits in the 86–90% band at about 2.32% of the loan — roughly $15,660 plus $1,409.4 of state insurance duty. Capitalised into the loan, it costs about $95.91 more per month and around $849,237.57 all-in over 30 years once interest is counted. Saving another $75,000 reaches the 20% line ($150,000) and removes the premium entirely.
LMI premiums vary by lender, insurer, loan size, postcode and borrower type — this calculator uses typical published rate tiers as an estimate only. Obtain a formal quote before making decisions. LMI protects the lender, not you.
What Is Lenders Mortgage Insurance?
Lenders Mortgage Insurance (LMI) is a one-off premium that protects the lender — not you — if a borrower defaults and the property sale cannot cover the debt. Australian lenders typically require it whenever the loan-to-value ratio (LVR) climbs above 80%, which is exactly where most first home buyers and ten-per-cent-deposit upgraders land. The premium is calculated as a percentage of the loan and scales steeply with risk: a 91% LVR loan can carry a premium several times larger than one at 81%, and bigger loans attract bigger percentage rates within each LVR band. The cost is easy to underestimate because it hides in the paperwork. On a $650,000 purchase with a 5% deposit, a typical premium runs past $23,000 — and most states then add stamp duty on the insurance premium itself, adding another couple of thousand dollars. Borrowers usually capitalise the premium into the loan, which means paying interest on it for up to thirty years. LMI is also why government schemes exist: the First Home Guarantee lets eligible buyers take a 5% deposit without paying LMI, because the government covers the risk. Whether to pay LMI, save longer, or qualify for a waiver is one of the biggest upfront money decisions in Australian property — and it deserves a proper calculation rather than a shrug.
How the LMI Estimate Is Calculated
The calculator works in four steps. First it derives the loan amount (price minus deposit) and the LVR as a percentage of the property price. Second it locates your LVR band — 81–85%, 86–90% or 91–95%, the three zones insurers price — and looks up a base premium rate from a tier table that also scales by loan size, mirroring how published insurer rate cards work. Below 80% LVR the rate is zero: no LMI applies. Third it adds state insurance duty, which most states levy on the premium itself (commonly around 9–11%), to produce the true upfront cost. Fourth it prices the two payment paths: paying the premium at settlement in cash, or capitalising it into the loan balance and repaying it with interest across the term. The capitalised path is where the real cost lives. Adding the premium to the loan increases every monthly repayment slightly, and over a 30-year term the interest on that premium can nearly double its face value. The calculator reports the extra monthly repayment, the cumulative extra interest, and the all-in cost so the premium can be compared honestly against the alternative of saving longer. It also back-solves the deposit needed to reach the 80% LVR line — the single most actionable number for anyone weighing up whether to buy now or keep saving.
Expert Insights
LMI Protects the Bank, Not You
The single most misunderstood point in Australian lending: if your property sells short of the debt and the insurer pays out, the insurer pursues you for the shortfall. LMI removes the lender's risk while leaving yours untouched. Treat the premium purely as a fee for borrowing at high LVR — never as protection you personally receive.
Capitalising Doubles the Sticker Price Over Time
A $20,000 premium capitalised into a 30-year loan at 6.2% costs roughly $38,000 all-in once interest is counted — and that is before the state duty on the premium. Where you have the cash, paying upfront saves real money; where you do not, the comparison to keep saving for another year should be priced against that all-in figure, not the headline premium.
Check Waivers Before You Pay a Cent
Certain professions — doctors, some lawyers, engineers, accountants — qualify for LMI waivers up to roughly 90% LVR with many lenders, and government schemes like the First Home Guarantee and regional equivalents eliminate the premium entirely for eligible buyers. A single phone call to a broker before applying can legitimately save a five-figure sum.
Actionable Tips
- 1
Price the Gap to the 80% Line
Use the shortfall output to see exactly how much extra deposit removes LMI entirely. Then work out how long saving that amount takes at your current rate. If the gap is small and reachable within a year or two, waiting usually beats paying a five-figure premium plus duty plus interest.
- 2
Compare Lender Premiums, Not Just Rates
LMI premiums differ materially between lenders because they use different insurers. Two loans at the same headline rate can carry premiums thousands of dollars apart. When comparing offers above 80% LVR, always ask for the total LMI quote including state duty, and fold it into your comparison-rate thinking.
- 3
Ask About a Lower LVR Band Before Settlement
Premium rates jump between bands, so a slightly larger deposit that drops you from 91% to 89% LVR can cut the premium by nearly half. If you are within reach of a band boundary, topping up the deposit — even with a gifted amount — is often the highest-return money you will ever deploy.
Real-World Examples
Sophie Weighs Buying Now Against Saving Two More Years
Sophie, a Melbourne teacher, had $45,000 saved against a $620,000 apartment — an 92.7% LVR loan carrying roughly $27,000 of LMI plus duty. Capitalised, the all-in cost approached $50,000 over her 30-year term. The calculator showed she needed another $79,000 to hit the 80% line. Saving that took nearly three years of flat rents, so she compromised: waiting eighteen months for a cheaper unit in a growth corridor cut the loan below the 85% band and the premium by more than half.
James Discovers a Profession Waiver
James, a hospital registrar in Adelaide, was quoted $19,800 of LMI on his 90% LVR purchase. A broker pointed out that several lenders waive LMI for medical practitioners up to 90% LVR. The waiver saved the entire premium plus roughly $1,800 of state duty — money that instead funded his offset account and cut years off his loan without changing a single repayment habit.
The Patels Top Up to the Band Boundary
The Patels' $780,000 townhouse purchase sat at 90.4% LVR, pricing them near the top of a steep band. A $12,000 top-up from family dropped the loan to 88.9% LVR, crossing into a cheaper band and cutting the premium from about $18,000 to $11,500. The $12,000 gift effectively returned $6,500 on day one — a better return than anything else in their portfolio.
Glossary of Terms
- Loan-to-Value Ratio (LVR)
- The loan amount divided by the property price, expressed as a percentage. Above 80% most Australian lenders require LMI.
- Capitalisation
- Adding the LMI premium to the loan balance instead of paying it at settlement. Easier on day one, but you pay interest on the premium for the life of the loan.
- First Home Guarantee
- A Commonwealth scheme where the government guarantees part of an eligible first home buyer's loan, allowing a 5% deposit without LMI. Places are capped and income and price caps apply.
Frequently Asked Questions
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Ivy Sinclair-Wren
Financial Chaos Analyst
Ivy Sinclair-Wren is a Financial Chaos Analyst covering investing, AI, wealth psychology, and the emotional consequences of opening finance apps during market crashes. Based in Melbourne, she specializes in demystifying the Australian tax code and helping users navigate the intersection of spreadsheet logic and human irrationality.