Calculate LMI in Australia: Complete Guide (2026)

Lenders Mortgage Insurance is one of the biggest variable costs in buying a home in Australia. The same property, the same buyer, can attract wildly different LMI charges depending on the deposit size, lender, and insurer. Understanding how to calculate LMI puts you in control.

The quick version: LMI costs across Australia

Here's what you'll typically pay in LMI across different Australian cities, based on median property prices and common deposit levels:

*Most lenders won't approve 95% LVR on loans above ~$1M. Figures are indicative.

The two LMI insurers: Helia vs QBE

Australia's LMI market is essentially a duopoly:

• Helia (formerly Genworth): Used by CBA, Bankwest, ING, and many smaller lenders
• QBE LMI: Used by NAB, ANZ, Westpac, and St. George

The premium tables differ between the two insurers. QBE tends to be slightly cheaper at lower LVRs, while Helia may be more competitive at higher LVRs — but the differences are typically 5-15%. You don't get to choose your insurer; the lender decides.

This is one reason to compare multiple lenders. The same property and deposit can attract different LMI charges depending on which insurer the lender uses.

How LMI premiums are structured

Both insurers use a matrix of premium rates based on two axes:

1. LVR band: 80.01-85%, 85.01-90%, 90.01-95%
2. Loan amount band: e.g., $0-$300k, $300k-$500k, $500k-$750k, $750k-$1M, $1M+

Within each cell of this matrix, there's a specific premium rate (expressed as a percentage of the loan amount). Crucially, the rate increases at higher loan amounts within each LVR band — a $900,000 loan at 90% LVR attracts a higher percentage rate than a $400,000 loan at 90% LVR.

State-by-state considerations

NSW

Stamp duty applies to the LMI premium (approximately 9%). This adds ~$1,000–$3,000 to the total LMI cost. NSW first home buyers can access the First Home Guarantee to avoid LMI.

VIC

Stamp duty also applies to LMI in Victoria (~10%). The new property tax alternative doesn't affect LMI — you still pay LMI if your deposit is under 20%, regardless of which stamp duty option you choose.

QLD

No stamp duty on LMI premiums in Queensland, making effective LMI costs slightly lower than NSW/VIC for the same loan. The $30,000 FHOG can be put toward a larger deposit to reduce LMI.

WA, SA, TAS

Lower median property prices mean lower absolute LMI costs. The government guarantee schemes operate nationally, so the same avoidance strategies apply.

Five strategies to minimise LMI

1. Hit the next LVR threshold

If you're at 91% LVR, finding an extra $10,000–$20,000 for your deposit to hit 90% (or even 88%) can save thousands. The premium jump between 90% and 85% LVR is significant.

2. Use a family guarantee

A guarantor loan where a parent pledges equity eliminates LMI entirely. The guarantee can typically be released within 2-5 years as your equity grows.

3. Apply for the First Home Guarantee

If you're a first home buyer earning under $125,000 (individual) or $200,000 (couple), the government guarantees up to 15% of the property value. No LMI required. Limited places per year.

4. Compare lenders

Different lenders = different insurers = different premiums. A broker who compares multiple lenders may find an LMI saving of $2,000–$5,000 for the same loan.

5. Consider LMI-free lenders

Some credit unions and online lenders offer LMI-free products at LVRs up to 85% or even 90%. The trade-off is usually a slightly higher interest rate. Calculate whether the higher rate over 3-5 years (until you refinance) costs more or less than the LMI.

LMI for investors vs owner-occupiers

Investment loan LMI premiums are generally 10-20% higher than owner-occupier premiums at the same LVR. This is because investment loans carry statistically higher default rates.

However, investors can claim LMI as a tax deduction over 5 years, reducing the effective after-tax cost. An investor in the 37% tax bracket paying $15,000 in LMI effectively pays ~$9,450 after the tax deduction.

The capitalisation trap

Most buyers capitalise LMI onto the loan because they don't have spare cash to pay it upfront. This is understandable, but be aware of the true cost:

• $12,000 LMI capitalised at 6.2% over 30 years = $14,500 in interest
• Total cost: $26,500 for what started as a $12,000 premium
• If you can pay LMI upfront from savings, you save significantly

One hybrid approach: capitalise the LMI but make extra repayments in the first 1-2 years to pay it off quickly, limiting the interest accumulation.