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Home Loan Repayment Calculator
Repayments, total interest and payoff time
About this calculator
This uses the standard amortisation formula: repayment = principal × periodic rate ÷ (1 − (1 + rate)^−periods). It handles principal & interest, interest-only, extra repayments and offset, so you can see the true lifetime cost before you apply.
Frequently asked
Do weekly or fortnightly repayments really save money?
Slightly. Splitting your monthly repayment into fortnightly halves means you make about one extra month's repayment a year, trimming the term and interest — switch the frequency in the tool to compare.
Extra repayments or an offset account — which is better?
The interest saving is similar. An offset keeps the cash accessible, while extra repayments directly reduce the balance. If your cash flow is variable, most people prefer an offset.