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Mortgage comparison calculator

See what a different loan could mean for you.

Compare your current home loan with a different rate, loan amount and term. Include one-off costs, a payment at the start or regular extra repayments.

1

Current home loan

Leave blank and the calculator will estimate the minimum principal-and-interest repayment.

2

Compared loan and repayments

Enter a different amount if the refinance includes additional borrowing. For example, $520,000 includes $20,000 of extra borrowing on a $500,000 balance. Add financed costs separately below; do not include them twice.

Include relevant discharge, break, application, valuation, legal or government costs. Split each cost once between upfront and financed amounts. Ongoing fees are not modelled.

Reduces the balance on day one. The scheduled repayment stays based on the new loan amount including financed costs, before this payment. A cashback received later has a different effect.

✓ Your figures stay in your browserYour figures are not submitted or stored by the calculator. Email opens a draft; you choose whether to send it.
✓ Compare a consistent termThe current remaining term is used unless you enter a different new term.
✓ Model an upfront paymentSee the estimated effect of applying a one-off amount at the start.
How this estimate works

This model assumes principal-and-interest repayments at constant rates. Weekly and fortnightly payments are converted to monthly equivalents using 52 weeks or 26 fortnights per year; interest is calculated monthly. Your lender may calculate interest daily, so actual amounts and payoff dates will differ.

Financed costs are added to the proposed loan. A one-off payment is applied immediately; repayments are calculated on the balance before that payment. Keeping your current repayment uses the higher of that amount and the new scheduled repayment, plus any extra payments. When an entered current repayment differs from the minimum estimate, the modelled current payoff time may differ from your remaining term.

The cost-adjusted comparison is current interest minus new interest minus the upfront and financed costs you enter. It is not a forecast of wealth, investment returns or overall financial benefit. Changes in borrowing, term and repayments affect the result. It does not account for the opportunity cost of using cash.

Excluded: ongoing fees, offsets, redraws, interest-only periods, future rate changes, cashback eligibility, tax consequences and lender-specific rules. Only the one-off costs you enter are included. Extra payments may be limited or incur charges under your loan terms. This is general information, not a quote, approval or personal credit recommendation.