KiwiSaver membership is open to most people who are living in New Zealand and are eligible national residents. Specifically, you can join if you are:

• a New Zealand citizen or legally entitled to live in New Zealand permanently, and
• living or normally living in New Zealand.

Additional points to note:

• If you are an employee, you can choose contribution rates (commonly 3%, 4%, 6%, 8%, or 10% of your before-tax wages), and your employer is required to contribute a minimum of 3% (with future changes planned to adjust these thresholds in some cases). There are transitional rules for different ages and employment situations, so check with your employer or provider for the exact rates applicable to you. [Cite: general KiwiSaver guidelines]
• If self-employed, a student, a stay-at-home parent, or not in paid employment, KiwiSaver is still available. You can set your own contribution level and benefit from government subsidies if eligible. [Cite: general KiwiSaver guidelines]
• Those under 18 can join via a KiwiSaver scheme provider, typically with parental or guardian involvement; under-16s need guardian consent to enrol. [Cite: youth KiwiSaver joining rules]
• People outside of New Zealand or on temporary visas generally cannot join KiwiSaver. [Cite: eligibility summary]

If you’d like, I can tailor this to your situation (for example, whether you’re employed, self-employed, or under 18, and whether you prefer to join via an employer payroll or directly with a KiwiSaver provider).