What your result means
The regular payment is the amount required to repay the entered loan over the selected term at an unchanged interest rate. Early payments generally contain more interest because the outstanding balance is higher.
Mortgage tools · New Zealand
Mortgage repayment calculator NZ
Test a property price, deposit, interest rate, term and repayment frequency. The result shows the regular repayment and estimated interest across an unchanged-rate scenario.
Last reviewed 19 August 2026 · Replace every default with a realistic scenario.
Your estimate
Estimated monthly repayment
$3,788
Based on a $600,000 loan
Total interest
$763,847
Paid off in
30.0 years
Total repaid
$1,363,847
Interest saved
$0
Estimate only: Mortgage results are planning estimates, not lender quotes, approval decisions or personalised financial advice. Actual repayments can differ because of lender methods, fees, rate changes and loan terms.
How the calculation works
The calculator first subtracts the deposit from the property value to find the loan amount. It then applies the standard amortising-loan formula using the periodic interest rate and total number of payments.
Example calculation
For a $750,000 property with a $150,000 deposit, the starting loan is $600,000. Entering a 30-year term and an illustrative rate calculates the regular payment and total interest for that unchanged-rate scenario.
What affects the result?
- A larger deposit reduces the amount borrowed.
- A higher interest rate increases the payment and total interest.
- A shorter term usually increases each payment but reduces the time interest accrues.
- Fees, rate changes and lender rounding can make an actual repayment differ.
New Zealand context and sources
New Zealand home loans may be split across fixed and floating rates, or use offset and revolving-credit structures. Sorted recommends allowing for ownership costs as well as repayments. This calculator models one standard principal-and-interest loan, so confirm the actual rate, payment and fees with your lender.
Frequently asked questions
Is this a lender quote?
No. It is a planning estimate and excludes lender-specific fees, rules, rounding and future rate changes.
Does weekly always save more than monthly?
Not automatically. Compare equivalent annual payment amounts because 52 weekly payments are not the same as 12 monthly payments divided by four.
Does the estimate include council rates or insurance?
No. It covers the modelled mortgage principal and interest only. Budget separately for rates, insurance, maintenance and other ownership costs.
What interest rate should I test?
Use a realistic scenario rather than treating a default as a forecast. Testing a higher rate can show how much room your budget has if borrowing costs change.
New Zealand mortgage guides
Review the calculation assumptions and current New Zealand lending context before comparing scenarios.
Related mortgage calculators
Planning repayments around the income that reaches your account? Estimate salary after tax with the New Zealand take-home pay calculator.