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KiwiSaver for Employers - Complete Guide

10 min read Updated November 2025

As an employer in New Zealand, you have important KiwiSaver obligations. This guide explains everything you need to know about auto-enrolment, contribution rates, opt-out rules, and how to manage KiwiSaver correctly for your casual employees.

What is KiwiSaver?

KiwiSaver is New Zealand's voluntary retirement savings scheme. While it's voluntary for employees, employers have mandatory obligations:

  • Auto-enrol eligible new employees
  • Deduct employee contributions from wages
  • Contribute 3% of gross wages yourself
  • Pay all contributions to IRD monthly
Official Resource: Read the KiwiSaver Employer Responsibilities Guide from the official KiwiSaver website.

Auto-Enrolment Rules

Who Must Be Auto-Enrolled

You must auto-enrol employees who are:

  • Aged 18 to 65 years old
  • New Zealand citizens or entitled to live in NZ permanently
  • Not already KiwiSaver members
  • Starting a new job (even if casual)

Who is Exempt

You don't need to auto-enrol employees who are:

  • Under 18 years old
  • 65 years or older (unless they specifically request to join)
  • On a temporary work visa
  • Already KiwiSaver members at another job
  • Have previously opted out of KiwiSaver
Important: You must auto-enrol eligible employees from their first pay. Failing to do so can result in penalties from IRD of up to $5,000.

KiwiSaver Contribution Rates

Employee Contributions

Employees can choose their contribution rate:

  • 3% of gross wages (minimum, default)
  • 4% of gross wages
  • 6% of gross wages
  • 8% of gross wages
  • 10% of gross wages

Employer Contributions

As an employer, you must contribute:

  • 3% of employee's gross wages (minimum required by law)
  • You can choose to contribute more than 3% voluntarily
  • Applies to all KiwiSaver members regardless of their contribution rate

Example Calculation

Scenario: Employee earns $1,000 gross and contributes 3%

  • Employee contribution: $1,000 × 3% = $30 (deducted from wages)
  • Employer contribution: $1,000 × 3% = $30 (your cost)
  • Total to IRD: $60
  • Employee receives: $1,000 - $30 (minus PAYE and ACC)
Automatic Calculations: Go Casual calculates both employee and employer KiwiSaver contributions automatically on every payslip. No manual math required. Try it free

Opt-Out Period (2-8 Weeks)

Employees can opt out of KiwiSaver, but only within a specific timeframe:

Opt-Out Window

  • Starts: Between 14-28 days after auto-enrolment
  • Ends: 8 weeks after auto-enrolment
  • How: Employee completes a KS10 Opt-Out form
  • Result: They get a refund of all contributions made

What Happens If They Opt Out

  • Stop deducting employee contributions
  • Stop making employer contributions
  • IRD refunds all deductions made during the 8-week period
  • Employee cannot rejoin KiwiSaver at this job (unless job changes)

If They Miss the Opt-Out Window

After 8 weeks, employees cannot opt out. They can only:

  • Take a contributions holiday (savings suspension)
  • Reduce their contribution rate to the minimum (3%)
  • Continue contributing until they change jobs

Your KiwiSaver Obligations Timeline

Day 1: Employee Starts Work

  • Auto-enrol if they're eligible (age 18-65, not exempt)
  • Start deducting employee contributions (3% default)
  • Start calculating your 3% employer contribution

Within 7 Days

First Payday

  • Deduct employee contribution from gross wages
  • Show deduction clearly on payslip
  • Calculate your 3% employer contribution (not deducted from wages)

By 20th of Each Month

  • Pay total KiwiSaver contributions to IRD
  • Include in your Employer Monthly Schedule
  • Pay employee + employer contributions together

Monthly KiwiSaver Checklist

Common KiwiSaver Scenarios

Scenario 1: Employee Already Has KiwiSaver

If an employee is already a KiwiSaver member:

  • You still make 3% employer contributions
  • Deduct their chosen contribution rate
  • File a KS2 form with IRD within 7 days

Scenario 2: Employee Under 18

  • Not auto-enrolled
  • Can join voluntarily
  • If they join, you must make 3% employer contributions

Scenario 3: Employee on Work Visa

  • Temporary visa holders are not auto-enrolled
  • Permanent residents are auto-enrolled
  • Check visa status carefully

Scenario 4: Casual Employee with Multiple Jobs

  • If they're already a KiwiSaver member from another job, they continue
  • You must still contribute 3% as their employer
  • They pay contributions from both jobs

Official KiwiSaver Resources

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