Two Numbers That Will Shape Your Home Loan
Before you speak to a lender, you need to understand Loan-to-Value Ratio (LVR) and Lenders Mortgage Insurance (LMI). They're connected — your LVR determines whether you'll pay LMI, and LMI can add tens of thousands of dollars to the cost of buying your home.
Use the LVR Calculator and LMI Calculator to model your numbers.
What Is LVR?
LVR stands for Loan-to-Value Ratio. It's the percentage of a property's value that you're borrowing. The formula is simple:
LVR = (Loan Amount ÷ Property Value) × 100
If you're buying a $600,000 home with a $90,000 deposit and borrowing $510,000, your LVR is 85% ($510,000 ÷ $600,000 = 0.85).
LVR matters because it tells the lender how much skin you have in the game. The lower your LVR, the less risk the lender carries — and the more favourable your terms.
The 80% LVR Threshold
The critical LVR threshold in Australian home lending is 80%. Below 80% LVR (i.e., a deposit of 20% or more), most lenders will approve your loan without requiring LMI. Above 80%, LMI becomes a near-universal requirement.
This is why the 20% deposit is treated as the gold standard by financial advisers — it's the point at which LMI disappears from the equation entirely.
What Is LMI?
Lenders Mortgage Insurance is an insurance policy that your lender takes out to protect itself if you default on your loan. Critically — and this confuses many buyers — LMI protects the lender, not you. But you pay the premium.
LMI is a one-time premium, typically added to your loan balance (capitalised). It's not an ongoing monthly cost, but because it's rolled into the loan, you pay interest on it for years.
How Much Does LMI Cost?
LMI premiums are set by insurers (primarily Helia, formerly Genworth, and QBE) and vary based on your LVR and loan size. Here are indicative figures for a $600,000 loan in 2026:
- LVR 85% (15% deposit, $90,000): LMI ~$9,000 – $12,000
- LVR 90% (10% deposit, $60,000): LMI ~$15,000 – $20,000
- LVR 95% (5% deposit, $30,000): LMI ~$23,000 – $30,000
Capitalised into a 30-year loan at 6.5%, a $20,000 LMI premium costs approximately $45,000 in total including interest. Run your own numbers with the LMI Calculator.
How LVR Affects Your Interest Rate
Beyond LMI, a high LVR can also result in a higher interest rate. Many lenders apply a risk margin above 80% LVR — typically 0.10%–0.40% above their standard variable rate. On a $500,000 loan, that extra 0.30% costs roughly $1,500/year in additional interest. Use the Mortgage Repayment Calculator to see the impact of rate differences on your monthly payments.
How to Avoid LMI
There are five main strategies to avoid paying LMI:
- Save a 20% deposit. The most straightforward route. At current prices this takes time, but the saving is real — $15,000–$30,000 depending on the purchase price.
- Use the First Home Guarantee (FHG). The Australian Government guarantees up to 15% of the loan, allowing eligible first home buyers to buy with just a 5% deposit and no LMI. 35,000 places are available per financial year. Income caps and property price caps apply.
- Use a guarantor. A parent or close family member can offer equity in their own property as additional security, bringing the effective LVR below 80% without a 20% deposit.
- Use a professional package. Some lenders waive LMI for specific professionals (doctors, accountants, lawyers) at LVRs up to 90% due to their assessed income stability and earning trajectory.
- Buy a lower-priced property first. Building equity in a cheaper property and refinancing later can allow you to buy your intended property at a lower LVR down the track.
LVR After Purchase: Why It Matters for Refinancing
LVR doesn't become irrelevant once you own the property — it follows you. As your property value rises and you pay down your loan, your LVR falls. When it drops below 80%, you gain access to better rates and can potentially remove any ongoing LMI-linked conditions from your loan. Many borrowers who bought at 85–90% LVR refinance 3–5 years later at a materially lower rate once their LVR has naturally reduced.
For reference guides on home loan strategy and how LVR fits into your broader property plan, these property finance titles on Amazon AU are practical and Australian-specific.