Property Loan Calculator Australia

How to Use This Property Loan Calculator

Enter your property price, deposit, interest rate and loan term. The calculator shows your estimated repayments instantly, then lets you check stamp duty for your state, see whether Lenders Mortgage Insurance applies at your deposit level and stress-test your repayments against rate rises. It takes about 30 seconds.

Understanding Your Repayments

Most Australian property loans use a principal and interest (P&I) structure. Each repayment covers a portion of the loan balance plus interest. In the early years, most of your repayment goes toward interest. Over time, that flips, and more of each payment reduces the actual debt.

Interest-only loans work differently. You pay only the interest for a set period (typically one to five years), so your repayments start lower. But the loan balance stays the same. Once the interest-only period ends, repayments jump because you need to pay off the full balance in less time. Worth noting: most lenders still assess you on P&I repayments regardless of which structure you pick.

Repayment Frequency Matters

This one surprises a lot of people. Switching from monthly to fortnightly repayments can save you tens of thousands in interest over the life of a 30-year loan, and you barely feel the difference.

Here is why it works. Fortnightly means 26 payments a year, which is the equivalent of 13 monthly payments instead of 12. That extra payment goes straight to reducing your balance, and because interest is calculated daily, every dollar off the balance saves you interest from that point forward. Use the frequency toggle above to see the difference for your loan.

Stamp Duty in Australia

Stamp duty (also called transfer duty) is a state government tax on property purchases, and it is one of the biggest upfront costs most buyers underestimate. Each state and territory sets its own rates and thresholds, so the amount varies depending on where you buy. A $750,000 property in NSW attracts roughly $29,240, while the same purchase in Queensland costs closer to $18,975.

First home buyers may qualify for concessions or full exemptions depending on the state and property price. Select your state and toggle "First Home Buyer" in the calculator above to see the estimate for your situation.

What Is Lenders Mortgage Insurance?

LMI is a one-off premium that kicks in when your deposit is below 20% of the property price (meaning your loan-to-value ratio exceeds 80%). It protects the lender if you default. It does not protect you.

The cost depends on your LVR and loan size. On a $600,000 loan at 90% LVR, LMI can easily run into the thousands. Most lenders let you add it to the loan balance, which means you pay interest on it for the full loan term. If you can stretch to a 20% deposit, you avoid it entirely. Some lenders also waive LMI for certain professionals like doctors, lawyers and accountants.

Why Stress-Testing Matters

Rates go up. That is not a prediction, it is a pattern. Lenders already stress-test your application at 2 to 3 percentage points above the actual rate. You should do the same with your own budget.

The rate stress test tab above shows exactly what your repayments look like at +1%, +2% and +3%. If the numbers at +2% make you uncomfortable, you are either borrowing too much or need a bigger buffer. Better to find that out here than after settlement.

Property Loan Calculator vs Mortgage Calculator

Same tool, different name. In Australia, a property loan calculator and a mortgage calculator do the same thing: estimate repayments based on your loan amount, rate and term. The difference is that this calculator is built specifically for Australian conditions. It includes state-specific stamp duty, LMI thresholds that local lenders actually use and repayment frequencies like fortnightly, which is common here but rarely appears on overseas calculator sites.

How a Repayment Calculator Helps You Plan

Most people know the property price. Fewer people know what that price actually costs them each month. A repayment calculator closes that gap.

For example, a $750,000 property with a 20% deposit at 6.20% costs roughly $3,668 per month over 30 years on P&I. Switch to fortnightly and you save tens of thousands over the life of the loan. Toggle between weekly, fortnightly and monthly above to compare. That kind of clarity makes a real difference when you are setting a budget or deciding between properties.

Using a Stamp Duty Calculator by State

Stamp duty is the upfront cost that catches most buyers off guard. The calculator above applies your state's exact tiered rate schedule to your purchase price, so you get a reliable estimate without needing to look up the tables yourself. Select your state, enter your price and the duty figure updates instantly. If you are a first home buyer, toggle that option to see whether you qualify for a concession or exemption in your state.

Understanding Borrowing Power

This calculator focuses on repayments for a specific loan amount. But you can also use it to estimate your borrowing power by working backwards. Start with the monthly repayment you can comfortably afford, then adjust the property price and deposit until the calculator shows that figure. That gives you a practical range.

Keep in mind that lenders apply a buffer of 2 to 3 percentage points when assessing your capacity, so check the stress test tab too. If the repayments at the buffered rate look tight, the lender will likely approve less than you expect. For a more detailed estimate, try a dedicated borrowing power calculator.

Tips for Getting the Most From This Calculator

Check current interest rates before you start. Ask a broker for an indicative rate or look at a comparison site so you are plugging in a number close to what you will actually pay.

Set aside more than just your deposit. You will also need cash for stamp duty, legal fees, building inspections and moving costs. Do not count that money as part of your deposit.

Run at least three scenarios. Compare a 20% deposit against a 10% deposit to see how LMI changes the total cost. Test a 25-year term against 30 years. Then check the stress test at +2% to confirm you can handle a rate rise. If all three scenarios look manageable, you are in a strong position to talk to a broker or lender.