How contributions are made:
If you've opted in to KiwiSaver and you're currently working for an employer, you’ll be contributing through employee contributions
Your employer contributes at least 3% through employer contributions
You can also make a voluntary contribution.
Initially, you can only make a contribution by making a direct payment to Inland Revenue (IR).
Log in to your online banking
find the ‘pay tax’ function
select the tax type KiwiSaver contributions by member (KSS)
follow the steps to contribute your chosen amount.
You can update your contribution rate at any time by providing written notification to your employer with a KS2 form. You can read more about this on the IRD website—keep in mind that you’ll need to contribute at least 3% if you’re currently working.