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Extra repayments calculator

Estimate how a regular extra repayment may affect the time to repay an amortising principal-and-interest loan and its estimated interest.

Enter your loan details

The extra repayment is modelled at the same frequency as the regular repayment.

Your extra repayment is applied each selected repayment period: monthly, fortnightly or weekly.
Estimate only. These calculations are estimates based on the information you enter. They do not account for all lender fees, product features, rate changes or individual circumstances. Actual repayments and interest may differ.

How this calculator works

The baseline repayment is derived from the loan amount, the rate, the remaining term and your selected frequency. The calculator then simulates each scheduled period: interest is calculated, the regular repayment is applied, the extra repayment is applied, and the balance is reduced until it reaches zero.

Extra repayments are assumed to occur at the same frequency as regular repayments. No customer information is collected to calculate an estimate. For broader preparation, visit residential lending.