Mortgage Repayment Calculator
Calculate your home loan repayments and see exactly how the loan is paid off over time. Adjust the rate, term and extra repayments to see the real impact on interest and payoff time.
How we estimate this
Your mortgage repayment depends on the loan amount, interest rate, term and how often you repay. Paying weekly or fortnightly instead of monthly, and making even small extra repayments, can save tens of thousands in interest and shave years off the loan.
Pricing reviewed: October 2026.
Understanding mortgage repayments in Australia
Your mortgage repayment depends on the loan amount, interest rate, term and how often you repay. Paying weekly or fortnightly instead of monthly, and making even small extra repayments, can save tens of thousands in interest and shave years off the loan.
Most of your early repayments go to interest, not principal, the amortisation chart shows how the balance falls and how the interest/principal split shifts over time.
Frequently asked questions
How are mortgage repayments calculated?
Repayments are calculated from the loan amount, interest rate and term using standard amortisation, each payment covers the interest on the remaining balance plus a portion of principal.
Do fortnightly repayments save money?
Yes, paying fortnightly (26 payments) rather than monthly effectively makes an extra month’s repayment each year, reducing interest and the loan term. The calculator shows the difference.
How much do extra repayments save?
Even small extra repayments early in the loan save significant interest because they reduce the balance that interest is charged on. Use the extra-repayment slider to see your saving.
Are you a property or finance business?
Everyone on this page is working out what mortgage repayment costs because they are ready to hire. Put your business right beneath the calculator, in your state, so you are who they find. From $600/mo.