When Lenders Mortgage Insurance Applies and How It Is Priced
Lenders Mortgage Insurance (LMI) is a one-off premium paid by the borrower that protects the lender — not the borrower — against loss if the loan defaults and the property sells for less than the outstanding debt. Despite the name, it is not insurance for you.
LMI is triggered when the loan-to-value ratio (LVR) exceeds 80%. Below that, the bank is satisfied that a forced sale will recover the debt with margin to spare. Above it, the bank requires either a third-party insurer (Helia or QBE LMI dominate the Australian market) or a self-insured equivalent.
How the Premium Is Priced
LMI premiums scale on two axes: LVR and loan size. They are non-linear — a small move from 89% to 91% LVR can double the premium because the insurer's expected loss on default rises sharply once the equity cushion disappears.
A representative grid from Helia's published rate cards looks roughly like this for owner-occupier loans:
- 81–85% LVR: ~0.5–1.0% of loan amount
- 86–90% LVR: ~1.5–2.5%
- 91–95% LVR: ~3.0–4.5%
The premium is usually capitalised — added to the loan rather than paid upfront — which means you also pay interest on the LMI for the life of the loan. ASIC's Moneysmart LMI glossary explains who the insurance protects.
This calculator also adds an indicative insurance-duty allowance by property state or territory where applicable. NSW is treated as 0% because Revenue NSW says LMI policies over NSW property are exempt from insurance duty for premiums paid on or after 1 July 2017. ACT is also treated as 0% because insurance duty has been abolished. Tasmania uses 2% for mortgage insurance policies based on the State Revenue Office guideline, rather than the general insurance rate. Other states use their published general insurance duty rates unless a lender-specific LMI quote says otherwise.
Some lenders waive LMI for specific professions (doctors, lawyers, accountants) up to 90% LVR. Others run "family pledge" or guarantor structures where a parent's equity covers the gap above 80%.
The First Home Guarantee Alternative
The Commonwealth's First Home Guarantee (FHG) lets eligible first home buyers purchase with a 5% deposit and no LMI because Housing Australia guarantees the portion of the loan above 80% LVR. The scheme has place caps each financial year, property price caps that vary by city and region, and income tests. Full eligibility rules sit at Housing Australia's Home Guarantee Scheme. The trade-offs are explained in more detail in the First Home Guarantee vs LMI guide.
For a buyer scraping together the minimum deposit, FHG often saves $20,000–$40,000 in capitalised LMI. The trade-off: a smaller deposit means a larger loan, more interest over time, and exposure to negative equity if prices fall in the first few years.
Worked Example: $800,000 Purchase, $720,000 Loan, 90% LVR
- Purchase price: $800,000
- Deposit: $80,000 (10%)
- Loan: $720,000 before LMI
- LVR: 90%
At 90% LVR on a $720k loan, the indicative LMI premium from a Helia-style grid is around 2.0% of the loan, or roughly $14,400 before any state insurance duty. The final lender quote can differ because insurer rate cards, GST treatment, duty settings, discounts and capitalisation rules vary.
Capitalised, the loan becomes $734,400 at an LVR of 91.8% — which can push some lenders into a higher LMI band, a circular problem solved by either accepting the higher premium or paying LMI upfront.
Repayment impact at 6.35% over 30 years: the $14,400 capitalised premium adds about $87 per month and roughly $31,000 in extra interest over the full term.
Same buyer under FHG with a 5% deposit ($40,000) and a $760,000 loan: no LMI premium, but the loan is $40k larger. At 6.35% that costs about $242/month more than the 10%-deposit-with-LMI scenario — but the buyer is in the market 12–18 months earlier on a typical savings rate, which usually outweighs the extra interest in a rising market.
Common Mistakes
- Assuming LMI is refundable. It is not automatic, except in narrow circumstances within the first 1–2 years on some policies. Refinancing to a new lender at high LVR usually triggers a fresh premium. The LMI refund guide explains what to ask before switching.
- Treating LMI as a tax deduction for owner-occupiers. It is not deductible. For investors, capitalised LMI is deductible over five years or the loan term, whichever is shorter.
- Capitalising LMI without checking the new LVR. Capitalisation can tip the loan into a higher band and increase the premium retrospectively.
- Assuming FHG places are always available. Place allocations reset each 1 July and major-city caps can fill within months.
- Comparing LMI quotes from different lenders by headline rate alone. The same insurer (Helia or QBE) can quote different premiums to different banks because of volume discounts. Always get the specific quote in writing.
