Lenders Mortgage Insurance can add tens of thousands of dollars to a low deposit purchase, and a lot of borrowers only find out how much once they’re deep into the application process. This guide breaks down what LMI actually is, how it’s calculated, what it typically costs, and the legitimate ways to reduce or avoid it altogether.

What Is Lenders Mortgage Insurance?

Lenders Mortgage Insurance is a one-off premium charged when your deposit is below 20 percent of the property’s value, meaning your loan-to-value ratio (LVR) sits above 80 percent.

  • It’s a genuine insurance policy, but not one that protects you
  • The premium is paid by the borrower, either upfront at settlement or capitalised onto the loan, meaning you pay interest on it for the life of the loan if it’s added on
  • It’s a one-off cost tied to the specific loan, not an ongoing charge
  • It generally applies regardless of which lender you choose, once your LVR crosses the 80 percent threshold

Why Lenders Charge LMI, and Who It Actually Protects

This is the part that catches a lot of borrowers off guard: LMI protects the lender, not you.

  • If you default on the loan and the property sells for less than what’s owed, LMI compensates the lender for that shortfall
  • It doesn’t protect your own financial position, if the lender pursues you for any remaining shortfall after LMI has paid out, you can still be liable
  • Lenders charge it because a loan above 80 percent LVR carries more risk for them, and LMI is how that risk gets transferred to an insurer, at your cost
  • Understanding this distinction matters because LMI is genuinely a cost of borrowing at a higher LVR, not a protection you’re buying for yourself

How LMI Is Calculated

The premium isn’t a flat fee, it scales with two main factors.

  • Loan size. A larger loan generally means a larger LMI premium in dollar terms
  • Loan-to-value ratio. The higher your LVR, the higher the premium, since a 95 percent LVR loan is considered meaningfully riskier than a 90 percent one
  • Each lender’s mortgage insurer calculates the exact premium using their own scale, so the same loan can attract different LMI costs at different lenders
  • The property type and your specific circumstances can also factor into the calculation, which is one reason getting quotes across multiple lenders matters

What LMI Typically Costs (Worked Examples)

Real figures make this much clearer than percentages alone. These are illustrative examples only, actual premiums vary by lender and insurer.

  • $700,000 property, 10% deposit ($70,000), 90% LVR. LMI on the resulting $630,000 loan could run somewhere in the range of $15,000 to $20,000
  • $700,000 property, 5% deposit ($35,000), 95% LVR. LMI on the resulting $665,000 loan could exceed $35,000

The jump between these two examples shows why LMI increases sharply as your deposit shrinks, it isn’t a gentle, linear increase, the cost accelerates the closer you get to a 95 percent LVR.

How to Reduce or Avoid LMI

There are several legitimate ways to reduce or avoid LMI entirely, and which one applies depends on your situation.

  • A larger deposit. Reaching 20 percent avoids LMI altogether, the most straightforward option if you have the time and ability to save further
  • A guarantor. Using a parent’s property equity as additional security can allow you to borrow above 80 percent LVR without LMI, since the guarantor’s equity reduces the lender’s risk
  • Government schemes. The First Home Guarantee lets eligible first home buyers purchase with as little as a 5 percent deposit without paying LMI, since the government guarantees the gap directly to the lender
  • Professional LMI waivers. Certain lenders waive LMI entirely for borrowers in specific professions, commonly doctors and other medical specialists, nurses, lawyers, accountants, and some engineers, often allowing borrowing up to 90 to 95 percent LVR with no premium at all. Eligibility varies by lender and generally requires professional body membership and a minimum income threshold

LMI and First Home Buyers: Schemes That Waive It

For first home buyers specifically, the First Home Guarantee is the most significant way to avoid LMI without needing a guarantor or a specific profession.

  • Eligible buyers can purchase with a 5 percent deposit, with the government guaranteeing up to 15 percent of the property value directly to the lender
  • This removes the LMI requirement entirely for eligible purchases, rather than reducing it
  • Our detailed First Home Guarantee Scheme guide covers eligibility, current QLD price caps, and how it works alongside other first home buyer support
  • Not every buyer or property is eligible, so it’s worth confirming your specific eligibility before assuming the scheme applies to your purchase

Is Paying LMI Ever Worth It?

Avoiding LMI isn’t automatically the right call for every buyer, and it’s worth weighing the genuine trade-off rather than assuming a bigger deposit always wins.

  • Waiting years to save an additional 10 to 15 percent deposit means missing out on however the property market moves in that time, which can outweigh the cost of LMI itself in a rising market
  • For investment properties specifically, LMI can generally be claimed as a borrowing cost deduction over five years, which changes the real after-tax cost compared to an owner-occupied purchase, worth discussing with your accountant if you’re weighing this up for an investment property
  • If none of the avoidance strategies genuinely apply to your situation, paying LMI to enter the market sooner is a legitimate, common choice, not a mistake
  • The right call depends on your specific numbers, your timeline, and what the market’s doing in your target area, not a blanket rule

FAQs

Is LMI a one-off cost or does it apply every year?
It’s a one-off premium tied to the specific loan, not an ongoing annual charge. It’s paid either upfront at settlement or capitalised onto the loan balance.

Can I get a refund on LMI if I pay off my loan early?
Generally no. LMI is non-refundable in most cases, even if you sell the property, refinance, or pay off the loan early. A partial refund is sometimes available in limited circumstances, but it’s not common.

Do all lenders charge the same LMI for the same loan?
No. Each lender works with its own mortgage insurer, and the exact premium calculation can differ, so the same loan amount and LVR can result in a different LMI cost depending on the lender.

Can self-employed borrowers access professional LMI waivers?
It depends on the lender and profession. Some lenders classify certain self-employed professionals, such as barristers or sole practitioners, differently to employed professionals in the same field, which can affect eligibility. It’s worth confirming directly rather than assuming.

Talk to a Broker About Avoiding LMI

Whether a bigger deposit, a guarantor, a government scheme, or a professional waiver applies to you depends entirely on your situation. Talk to a broker about your low deposit strategy, and we’ll help you work out whether you can avoid LMI altogether. Explore our First Home Loans page or get in touch through our contact page to get started.

This is general information only and does not constitute financial, credit, or tax advice. LMI eligibility, waivers, and premium calculations vary by lender and can change, always confirm current details with a licensed broker, and speak to a registered tax agent regarding any tax deductibility questions specific to your situation.