Lenders Mortgage Insurance (LMI) is an extra cost that kicks in when you borrow more than 80% of a property’s value. While it protects the bank, not you, it can add thousands to your loan. In this guide, we’ll explain exactly how LMI works, why it matters for homebuyers and investors, and the practical ways you can avoid or reduce it.

LMI Explained: How It Works and How to Avoid It
Buying a home often comes with hidden costs, and one of the biggest is Lenders Mortgage Insurance (LMI). Many first-time buyers and even experienced investors are caught off guard when their lender mentions it. Understanding how LMI works can save you thousands and help you plan smarter.
What Is Lender’s Mortgage Insurance (LMI)?
LMI is a one-off insurance premium charged when you borrow more than 80% of a property’s value.
It’s important to note: LMI protects the lender, not you. If you default on your home loan and the property sale doesn’t cover the debt, the insurer compensates the bank, not the borrower.
For homeowners, that means LMI is essentially an extra upfront cost that reduces your borrowing power.
When Does LMI Apply?
You’ll usually be charged LMI if:
- Your deposit is less than 20% of the purchase price.
- You’re refinancing, and your equity is under 20%.
- You’re buying an investment property with a high loan-to-value ratio (LVR).
Example:
If you’re purchasing a $600,000 home with only a $60,000 deposit (10%), your LVR is 90%. This almost always triggers LMI.
How Much Does LMI Cost?
LMI isn’t a fixed fee—it depends on the loan amount, LVR, and the lender’s insurer.
As a rough guide:
- On a $600,000 loan with a 90% LVR, LMI could be $10,000–$15,000.
- On a 95% LVR loan, it can jump above $20,000.
Most lenders allow you to capitalise LMI into the loan, meaning it gets added on top of your mortgage. While this avoids upfront payment, you’ll pay interest on it for the life of the loan.
Pros and Cons of LMI
Pros:
- Let you buy sooner with a smaller deposit.
- Useful in rising markets where waiting to save 20% could mean missing out.
- Sometimes the only option for first home buyers without guarantors.
Cons:
- Adds thousands to your loan balance.
- Protects the bank, not you.
- Reduces available equity if you refinance later.
Strategies to Avoid or Reduce LMI
1. Save a 20% Deposit
The simplest way to avoid LMI is by reaching an 80% LVR. For many buyers, this takes longer, but it saves thousands.
2. Use a Guarantor Loan
A parent or close relative can offer part of their property as security. This allows you to avoid LMI even with a smaller cash deposit.
3. First Home Buyer Schemes
Government initiatives like the First Home Guarantee Scheme let eligible buyers purchase with as little as 5% deposit and no LMI.
4. Lender-Specific Waivers
Some lenders waive LMI for certain professions (e.g., doctors, lawyers, accountants, nurses). This is worth exploring if you work in these fields.
5. Deposit Boost loan: The Deposit Boost loan helps cover the full 20% deposit on a home purchase or investment property, letting buyers avoid Lenders Mortgage Insurance (LMI) and reduce upfront costs significantly.
Why LMI Matters for Homebuyers and Investors
For first home buyers, LMI can make or break affordability. Avoiding it could mean saving enough for furniture or renovations instead.
For investors, it’s a strategic decision: sometimes paying LMI is worth it if it allows you to buy sooner and capture capital growth. Other times, it makes sense to restructure or use equity differently.
Why LMI Matters for Homebuyers and Investors
For first home buyers, LMI can make or break affordability. Avoiding it could mean saving enough for furniture or renovations instead.
For investors, it’s a strategic decision: sometimes paying LMI is worth it if it allows you to buy sooner and capture capital growth. Other times, it makes sense to restructure or use equity differently.
Final Thoughts: Make the Right Move with Expert Guidance
LMI doesn’t have to be a roadblock. With the right strategy, whether that’s saving a bigger deposit, using a guarantor, or taking advantage of government schemes, you can minimise or avoid it altogether.
As a mortgage broker, I help clients every day find pathways around LMI and structure their loans to save thousands upfront and over the life of the loan, while avoiding common mistakes.
