Estimate your monthly or fortnightly repayment and the total interest over the life of the loan. Real numbers, standard maths, no email address required.
Repayment calculator
Enter the loan amount, the rate on your offer or statement, and the term. Add an optional extra repayment to see how much sooner the loan could be gone, and how much interest that could avoid.
The maths is standard amortisation. Fortnightly figures assume 26 payments a year, each half the monthly repayment. The government’s MoneySmart calculator compounds fortnightly instead of halving the monthly repayment, so its fortnightly figure will differ slightly from this one; monthly figures match. The estimate does not include fees, offset accounts or future rate changes.
Estimates only — not a quote, a comparison rate, or an indication that you qualify. Your actual repayments depend on the lender's calculation, fees and your circumstances. General information only; check figures with the MoneySmart mortgage calculator. Fortnightly repayments are calculated as half the monthly repayment, paid 26 times a year.
Reading the result
This is the standard principal-and-interest repayment that pays the loan off exactly at the end of the term, at the rate you entered. It is the same amortisation maths lenders and government calculators use. If you choose fortnightly, the calculator shows half the monthly repayment paid 26 times a year — which quietly adds the equivalent of one extra monthly repayment annually, so the loan finishes early.
Total interest is often the number that surprises people — over 30 years it can approach or exceed the amount borrowed. It is very sensitive to the rate and the term, which is why a small rate difference or a shorter term matters more than it first appears.
It does not include application or ongoing fees, lenders mortgage insurance, offset account effects, redraw, interest-only periods, package discounts or future rate changes. Variable rates move, so the real total interest on any variable loan will differ from this estimate.
Whether a lender would actually approve the loan. That depends on income, expenses, credit history and lender policy — which is exactly the part John does with you, not a calculator.
Want the loyalty-tax angle? See the extra repayments calculator for how small additional payments change the payoff date, or the borrowing power estimator for a rough lending range.
Next step
A calculator shows the maths. John checks the numbers against real lender policy, your income and where rates are actually sitting — then tells you plainly whether there is anything worth doing.
Rated 5.0 on Google · You deal with John directly
General information only. Credit assistance is subject to lender policy and responsible lending requirements.
Cross-check
The Australian Government's repayment calculator. Run the same numbers there — the results should line up.
Open the MoneySmart calculatorExtra repayments, QLD stamp duty and borrowing power — all free, all estimates, all cross-checkable.
See all calculatorsJohn's AI mortgage helper
General information only. This helper cannot confirm approval, choose a lender or give personal credit advice.
Do not enter passwords, account numbers, tax file numbers, dates of birth or identity-document details.
Send the important details to John Book a 20-min call with John