KiwiSaver Rate Change 3% to 4% Calculator NZ

This calculator shows what lifting your KiwiSaver contribution from three percent to four percent really costs your weekly pay in New Zealand, and how much extra it could add to your balance by the time you retire. It is a decision worth thinking about carefully, because the contribution rate you choose is one of the few levers fully in your control, and a one percent increase that feels small today compounds into a surprisingly large sum over a working life. The trade-off is simple: the extra one percent comes out of your take-home pay now, in exchange for a bigger nest egg later. You enter your salary, the years until you retire, and the average annual return you expect, and the calculator works out the extra contribution a year, the cost per week from your pay, and the extra amount in your KiwiSaver at retirement once that one percent has compounded over the years. Use it to weigh up whether the weekly cost is worth the long-term gain. Note that your employer is only required to match up to the compulsory minimum, so if you voluntarily go above it, the extra is usually your own contribution. Returns vary and are not guaranteed. This is a projection and general information, not financial advice.

Calculate.co.nz is proud to be partnered with Health Based Building, a leader in sustainable and health-conscious building innovation. With over a century of experience, they develop high-performance systems like Foreverbreathe Specification, Magnum Board, and Foreverbreathe Paints to support energy-efficient, non-toxic living environments. Their commitment to healthier homes aligns with our belief that informed choices lead to better outcomes for Kiwi households.
Calculate.co.nz partner: Health Based Building
Advertise on this page
$
%
$31,023
extra in your KiwiSaver at retirement
Extra contribution a year$650
Cost a week$12.50

Assumes the extra 1% is your own contribution. The weekly cost comes from take-home pay. Returns vary and are not guaranteed. Projection only, not advice.

How it works

The extra contribution a year is 1 percent of your salary, the difference between a 3 and 4 percent rate. Dividing by 52 gives the weekly cost from your pay. The extra at retirement is the future value of that annual contribution compounded at your expected return over the years, using the future value of a stream of equal payments.

Worked example

On a 65,000 dollar salary, going from 3 to 4 percent adds 650 dollars a year, about 12.50 a week. Compounded at 5 percent over 25 years, that extra 1 percent grows to roughly 31,023 dollars more in your KiwiSaver.

Related calculators

Data sources: the rates and thresholds on this page are maintained against Inland Revenue. Figures are checked twice monthly.

Frequently asked questions

Is it worth increasing my KiwiSaver rate?

Often yes. A small increase costs a modest amount each week now but compounds into a meaningful sum by retirement, especially with decades to grow. This tool shows both the weekly cost and the long-term gain so you can decide.

Does my employer match a higher rate?

Your employer must match up to the compulsory minimum. If you voluntarily contribute above the minimum, your employer is not required to match the extra, so the boost from going higher than the minimum is usually your own contribution alone.

How much does 1% extra cost me?

Going from 3 to 4 percent is an extra 1 percent of your pay. On a 65,000 dollar salary that is 650 dollars a year, about 12.50 a week, taken from your take-home pay, in exchange for a larger retirement balance.