Mortgage Amortisation Schedule Calculator NZ 2026

This calculator builds a full month-by-month amortisation schedule for a home loan, showing exactly how each repayment splits between interest and principal over the entire life of your mortgage. Amortisation is the process of paying off a loan through equal instalments, and because interest is charged on the reducing balance, the make-up of each payment changes over time: in the early years, most of your payment covers interest, while later on more of it goes towards paying down the principal itself. You enter the property price, your deposit (as either a percentage or a dollar amount), the loan term in years and the interest rate, and the calculator works out the principal you are borrowing and your fixed monthly repayment. It then produces a table listing every single month of the loan, showing the payment amount, the interest portion, the principal portion and the remaining loan balance after that payment, right through to the final month when the balance reaches zero. Scroll through the schedule to see how quickly your balance falls, or to check the balance at any point if you are considering refinancing or making extra repayments. This is a fixed-rate, table mortgage estimate based on the figures you enter; it does not account for rate changes, fees, or extra lump-sum payments, so treat the results as an indicative guide rather than your bank's actual repayment schedule.

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