Mortgage Repayment
Calculator.
Enter your loan details and see instant weekly, fortnightly, and monthly repayments based on current NZ market rates.
About This Calculator
This calculator provides an estimate based on a principal & interest repayment structure. Actual repayments may vary based on your lender, loan structure, and fees.
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These are estimates. Finch compares 20+ NZ lenders to find the best actual rate for your situation — no cost to you.
Get Pre-Approved Free →How the NZ Mortgage Repayment Calculator Works
This calculator estimates your weekly, fortnightly, or monthly mortgage repayments based on a New Zealand standard table-loan repayment formula — the most common loan type offered by every NZ registered bank (ANZ, ASB, BNZ, Westpac, Kiwibank, TSB, SBS, The Co-operative Bank, Heartland) and non-bank lenders. A table loan blends principal and interest in each repayment, so early payments are interest-heavy and later payments are principal-heavy. To estimate your real-world repayment, enter the loan amount you'll borrow (after deposit), the interest rate, and the loan term — typically 25 to 30 years in NZ.
What NZ Rate Should You Use?
For planning a purchase, model two rates: the current fixed rate (what you'll actually pay in year one — see live rates on our NZ mortgage rates page) and the lender's test rate (what banks use to stress-test serviceability — typically 7.0% to 9.0% in 2026). The test rate determines what they'll actually lend you, even if your real repayments are at a much lower carded rate. Modelling both rates protects you from rate-rise shock at the end of your fixed term.
Worked NZ Example: $600,000 Loan
A $600,000 home loan over 30 years at a 6.29% fixed rate produces approximately:
- Monthly: ~$3,712
- Fortnightly: ~$1,712
- Weekly: ~$856
Switching to fortnightly repayments rather than monthly typically shaves several years off the loan term and tens of thousands off total interest — because you make 26 fortnightly payments per year (equivalent to 13 monthly payments, not 12). Test this saving with our extra repayment calculator.
Other Cost Factors to Plan for as an NZ Buyer
Your mortgage repayment is the largest line item but not the only one. Budget realistically:
- Council rates — typically $2,500–$5,000+ per year depending on region and property value.
- House & contents insurance — required by the lender; typically $1,800–$3,500/year.
- Maintenance reserve — plan 1–2% of property value annually.
- Body corporate / cross-lease costs — for apartments and townhouses.
- Mortgage protection insurance — recommended; cost varies with age and cover.
Fixed, Floating & Split Loans in New Zealand
Most NZ home loans are structured as a fixed term (1, 2, 3 or 5 years), a floating portion, or a split combining both. Fixed protects against OCR rises; floating allows unlimited lump-sum repayments. Splits give you both. We model every option against your real cash flow before recommending. Read more in our How NZ Mortgages Work guide and our interest rates guide.