NZ Repayment Calculator
Calculate New Zealand mortgage repayments for weekly, fortnightly, and monthly frequencies. Compare table vs floating rates, split loan strategy, and OCR rate scenarios.
Weekly and fortnightly repayments reduce total interest because you effectively make 13 monthly-equivalent payments per year instead of 12 — paying down principal faster.
| Frequency | Payment | Annual Cost | Total Interest | Interest Saved vs Monthly |
|---|---|---|---|---|
| Weekly (52 payments/year) | NZ$767 | NZ$39,878 | NZ$696,336 | — |
| Fortnightly (26 payments/year) | NZ$1,534 | NZ$39,878 | NZ$696,336 | — |
| Monthly (12 payments/year) | NZ$3,323 | NZ$39,878 | NZ$696,336 | — |
OCR rate scenarios — how changes to the RBNZ Official Cash Rate would affect your repayments at the next refix.
| OCR Scenario | New Rate | Monthly Payment | Change vs Current | Annual Impact |
|---|---|---|---|---|
| -0.50% (OCR cut) | 6.49% | NZ$3,157 | -NZ$166 | -NZ$1,993/yr |
| -0.25% (OCR cut) | 6.74% | NZ$3,240 | -NZ$83 | -NZ$1,002/yr |
| Current (no change) | 6.99% | NZ$3,323 | — | — |
| +0.25% (OCR rise) | 7.24% | NZ$3,407 | +NZ$84 | +NZ$1,012/yr |
| +0.50% (OCR rise) | 7.49% | NZ$3,493 | +NZ$169 | +NZ$2,034/yr |
| Fix For | Pros | Cons |
|---|---|---|
| 1 year | Lowest rate in most market conditions. Re-evaluates frequently. | Renewal risk every 12 months — more admin, rate uncertainty. |
| 2 years | Balance of low rate and medium certainty. Most popular NZ term. | Rate locked even if OCR falls significantly. |
| 3 years | Good certainty for budgeting. Lock in current rate if rates rising. | Break fees can be very large if you sell or refinance. |
| 5 years | Maximum certainty — ideal when rates are historically low. | Usually carries a rate premium. Rarely the cheapest option. |
How to Use the NZ Repayment Calculator
Enter your Loan Amount, Interest Rate, Loan Term, and Payment Frequency. The calculator converts between weekly, fortnightly, and monthly payments — showing total interest savings from more frequent payments. Use the Advanced section to compare table vs floating rates, and the Pro section to model fixing strategy and repayment holidays.
NZ Mortgage Repayment Explained
Table Mortgage vs Floating Mortgage
In New Zealand, "repayment calculator" refers to what other countries call a mortgage payment calculator. NZ uses distinct terminology: a table mortgage (also called fixed) has a locked rate for 1-5 years, with equal principal-and-interest payments. A floating mortgage has a variable rate that moves with the RBNZ Official Cash Rate (OCR), with unlimited extra repayments at no cost.
Payment Frequency in New Zealand
New Zealand borrowers have three repayment frequency options — weekly, fortnightly, and monthly. Weekly and fortnightly repayments reduce total interest because they equate to making 13 monthly-equivalent payments per year rather than 12. The extra payment goes entirely to reducing principal, shortening the loan term and saving tens of thousands in interest over 30 years.
Fortnightly payment = (Monthly payment × 12) ÷ 26
A $500,000 loan at 6.99% over 30 years:
Monthly: $3,322/month — Total interest: $695,920
Fortnightly: $1,661/fortnight — Interest saving: ~$35,000
Weekly: $830/week — Interest saving: ~$39,000
Revolving Credit Facility
A revolving credit facility (offered by all major NZ banks) works like an overdraft secured against your home. Your salary is deposited into the revolving credit account, reducing your daily balance — and the interest charged. As bills are paid, the balance rises back. The net effect is that your average daily balance is lower than your loan amount, significantly reducing the interest cost. It is most effective when combined with disciplined budgeting.
Example: $500,000 Loan at 6.99% over 30 Years
Payment Frequency Comparison
| Monthly (12 payments/year) | $3,322/month |
| Fortnightly (26 payments/year) | $1,661/fortnight |
| Weekly (52 payments/year) | $830/week |
| Total Interest — Monthly | $695,920 |
| Estimated Interest Saved — Fortnightly | ~$35,000 |
| Estimated Interest Saved — Weekly | ~$39,000 |