Mortgage Calculator New Zealand
Estimate your monthly home loan payment — principal, interest, taxes and insurance.
Results update as you type.
About this calculator
Figures shown use New Zealand defaults: amounts in NZD ($) and a sample interest rate of 6.8%.
A mortgage calculator estimates the monthly payment on a home loan from the amount borrowed, the interest rate and the term. Turn on advanced options to include a down payment, property tax, home insurance, HOA fees and extra monthly payments to see your true total cost and payoff date.
Frequently asked questions
How is a mortgage payment calculated?
The principal and interest portion uses the standard amortization formula: M = P·r·(1+r)^n / ((1+r)^n − 1), where P is the loan amount, r the monthly rate, and n the number of monthly payments. Taxes, insurance and HOA are added on top.
Does a bigger down payment lower my payment?
Yes. A larger down payment reduces the amount financed, which lowers both the monthly principal-and-interest and the total interest you pay over the loan.
What does an extra monthly payment do?
Extra principal each month is applied straight to the balance, so the loan is paid off earlier and you pay noticeably less total interest.
Results are estimates for general guidance only, not financial, medical or tax advice.