Traction resources / Mortgage tools

Mortgage
repayment calculator.

See what your New Zealand home loan could cost. Compare weekly, fortnightly and monthly repayments, explore extra repayments, and see how a change in interest rates could affect your budget.

Your mortgage details

Table loan (principal and interest): each regular repayment covers interest and pays down the loan balance.

Your estimated repayments

Principal & interest / fortnightly$0Standard minimum estimated repayment
Total interest (standard loan)$0
Total repaid (standard loan)$0

Estimates assume a constant interest rate for the remaining term. Actual NZ bank calculations may differ due to daily interest, repayment dates and rounding.

Explore extra repayments & interest rate changes

Your standard repayment is shown above. Try the options below to see how paying extra or a higher interest rate could change your mortgage.

Change the assumptions

This is on top of the standard repayment, subject to your lender's terms and any fixed-rate limits or fees.

Your comparison results

Repayment with extra$0
Estimated payoff with extra—

What could change?

Interest saved with extra repayments$0
Time saved with extra repayments—
Repayment at 7.50% p.a.$0

How your loan reduces over time

This graph shows your standard mortgage repayments only. It does not include any extra repayments or interest rate increases selected in the comparison section above.

Standard repayments only: Extra repayments and interest rate rise scenarios are not included in this graph.

Original mortgage amountRemaining loan balance

Important assumption: This graph assumes standard repayments without extra payments and the same interest rate for the entire mortgage term. In reality, NZ mortgage interest rates can change when you refix or when floating rates move, so your actual repayments and loan balance will differ. This is an illustration only, not a forecast.

NZ fixed rates and refixing

Your fixed-rate period is not the same as your total mortgage term. You might have 25–30 years left on your loan but refix your interest rate much sooner. Repayments may change at refixing.

Repayment frequency

Choose weekly, fortnightly or monthly repayments to see an estimate based on your preferred payment frequency.

Interest-only loans

Interest-only payments do not reduce the principal. They are typically approved for a limited period; when that period ends, repayments can rise as principal must also be repaid.

Want help structuring your mortgage?

Talk with a Traction adviser about fixed and floating portions, repayment frequency, loan terms and your options.

Get in touch →

This calculator is for general information only and is not personalised financial advice, a lending quote or an approval. It models a single loan at a constant annual interest rate using equal repayment periods. NZ lenders commonly calculate interest daily, so actual amounts can differ due to calendar dates, bank methodology and rounding. The model excludes lender fees, low-equity margins, offset/revolving-credit arrangements, changes in interest rates and changes to the loan balance. Extra repayments may be restricted or incur charges, especially during fixed-rate periods. Interest-only estimates assume the balance is not repaid during the illustrated term; they do not model the later principal-and-interest period. Confirm figures and lending conditions with your lender or adviser.