About this site

NZ Mortgages publishes calculators for the mortgage arithmetic New Zealanders search for: repayments, borrowing power, break costs, offset versus revolving credit, first home deposits and whether refinancing pays for itself.

What we are not

We are not a mortgage broker, a bank, or a financial advice provider. We hold no licence from the Financial Markets Authority and we are not on the Financial Service Providers Register, because we do not give financial advice.

That distinction is not decoration. Under the Financial Markets Conduct Act 2013, telling someone what loan they qualify for, which lender suits them, or what they should do about their mortgage is regulated financial advice, and providing it without a licence is an offence. So this site does arithmetic on numbers you type in, and stops there. You will never see a verdict, an eligibility result, or a lender recommendation here.

Why there is no rate table

Mortgage rates in New Zealand move week to week, and a rate table that is even a fortnight stale is worse than no table at all — it invites you to plan around a number that no longer exists. Every calculator here takes the interest rate as an input instead, so you can enter the rate you have actually been quoted.

For today’s advertised rates, interest.co.nz maintains the comparison every New Zealand bank gets measured against.

How the calculators work

They run entirely in your browser. Nothing you enter is submitted to us, stored, logged or emailed anywhere, and there is no form standing between you and the answer. You can check this yourself: the pages work with the network disconnected after they load.

The maths is the standard New Zealand table loan — level repayments covering interest on the outstanding balance plus a slice of principal. Fortnightly and weekly options compound at their own frequency rather than approximating a monthly figure, because that is how the loans are actually written here.

One calculator is deliberately labelled as indicative. Break costs depend on each bank’s own formula and internal wholesale rates, which are not published, so no outside party can reproduce a bank’s number. Our break fee calculator shows the shape and order of magnitude, and says so on the page.

How we make money

Nothing is sold on this site, and there is no advertising. If that changes — for example a referral arrangement with a licensed adviser — it will be disclosed on the disclosure page and on the page where you would act on it, before you act, not in a footnote afterwards.

Corrections

If a figure or a formula here is wrong, we want to know and we will fix it. Policy in this area changes — the First Home Grant closed to new applications in 2024, LVR settings move, and Inland Revenue’s treatment of borrowing costs on rentals has changed more than once — so pages carry the caveat that the administering body is the authority, not us.