There are some generous incentives to encourage people to join KiwiSaver
Compulsory employer contributions
If you are employed and 18 or over and contributing to KiwiSaver from your salary or wages, your employer is required to contribute 3% of your gross salary or wages (unless your employer is already contributing to an alternative NZ Super scheme on your behalf).
After three years membership you can withdraw everything from your account except $1,000 (and any funds you have transferred from an Australian super fund).
Subject to income and house price caps, after three years membership you may be eligible for up to $10,000 extra support from the Government towards your first home.
If you have worked in Aussie since 1992, you can bring your Aussie Super back to your KiwiSaver account. Makes life easier having all your retirement savings in one place, not to mention the fees you'll save.