iFindProperty Interest Rate Fixing Calculator

Compares two interest rates and terms to help you make decisions.

Enter a loan amount, a short-term rate, and a longer-term rate. The tool will show you a "break even" rate, which is what you will need to fix at from the end of the short term, until the end of the long term, to have effectively broken even with simply fixing for the long term rate from the start.

How to use

  1. Enter two available rates — shortest term must come first.
  2. Enter a loan amount.
  3. Compare the "break even" rate displayed with what interest rate you think will be available at the end of the short term.
Months
Interest rate %
(a) Short term
mo
%
(b) Long term
mo
%
$ 300,000
Breakeven rate
—
Interest Paid Breakdown
Initial 6 months interest at short term rate —
Remaining 6 months interest at breakeven rate —
Total interest over the period —
12 months interest at long term rate —
Current NZ bank carded rates: interest.co.nz/borrowing/mortgages
Important
  1. This is neither financial nor lending strategy advice. The lowest rate is not always best. Discuss loan structures with a mortgage advisor.
  2. There are many approaches to lending, e.g. breaking a loan into a few smaller loans and fixing each for different lengths.
  3. The creators of this tool accept no liability for an adverse financial outcome due to your choice of lending rate or term.
  4. There are other reasons to fix long or short than the rate, such as flexibility around early repayments or certainty of outgoings.
  5. This tool does not consider a return on investing the money saved by paying lower interest for a period.