Mortgage Calculator for real decisions
Buying a home is one of the biggest financial decisions you'll ever make, so it helps to go in with the numbers clearly in front of you. This mortgage calculator is built to give you a genuine, detailed picture of your loan — not just a monthly repayment figure, but the full story: total interest paid, how an offset account affects your outcome, what happens if rates rise, and how extra repayments can shave years off your loan.
No sign-up required. No data leaving your browser. Just the numbers.
Open the CalculatorUnderstanding LVR and LMI
Two terms that come up a lot in home lending are LVR (Loan-to-Value Ratio) and LMI (Lender's Mortgage Insurance). Your LVR is simply the size of your loan expressed as a percentage of the property's value. If you're buying a $500,000 home with a $100,000 deposit, your LVR is 80%.
Most lenders require LMI once your LVR exceeds 80% — meaning your deposit is less than 20% of the purchase price. LMI protects the lender (not you) in case you default on the loan, and it can add thousands of dollars to your costs. The calculator flags your LVR automatically so you always know where you stand.
How to get the most out of this tool
Start by entering your real numbers — home price, expected deposit, and the interest rate you've been quoted or are currently paying. From there, experiment with the loan term. Dropping from 30 years to 25 years often increases your monthly repayment by less than you'd expect, while saving tens of thousands in interest.
If you have savings sitting in a bank account, model them as an offset balance and see the impact. Many people are surprised to find that $20,000–$50,000 in offset can shave two to four years off a standard 30-year mortgage.
Stress-test your budget. Use the rate comparison tool to check you can comfortably handle repayments if rates were to rise by 1–2% before committing to a loan. It's a simple step that can save a lot of stress down the track.
Export your results to PDF
Once you've run your numbers, you can export a summary to PDF — useful for keeping a record, sharing with a partner, or taking into a meeting with your broker or lender.
One of the more powerful ways to use this feature is to run multiple scenarios and export each one separately. For example, you might model your loan at the standard repayment with no extras, then create a second scenario with an offset account added, and a third with extra monthly repayments on top of that. Exporting each scenario gives you a clear, side-by-side comparison you can refer back to — making it much easier to see which approach pays your loan off fastest and saves the most in interest over the life of the loan.
Use the report label field to name each export clearly so they're easy to tell apart.
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