KiwiSaver Employer Contribution Rules

If you employ someone in New Zealand who belongs to KiwiSaver, you have to put money into their account on top of their pay. That payment is called the compulsory employer contribution, or CEC. Since 1 April 2026 the minimum has been 3.5% of the employee’s gross pay, up from 3%. It is scheduled to rise again to 4% on 1 April 2028.

It is not a nice-to-have, and it is not something you can negotiate away in an employment agreement. It is a statutory minimum, and Inland Revenue collects it alongside PAYE.

Where the 3.5% actually goes

This is the part that surprises people. The 3.5% is a gross figure. Before the money lands in the employee’s KiwiSaver account, Inland Revenue takes Employer Superannuation Contribution Tax (ESCT) out of it.

ESCT exists so employer contributions are taxed the way salary is taxed. Rates run from 10.5% to 39%, and the rate you use is worked out per employee, based on their salary and wages plus your gross contributions to them. You calculate it at the start of each tax year, and it changes as people’s pay changes. Budget 2025 lifted the contribution rate but left ESCT rates and thresholds alone, so the same proportion reaches the fund — just on a bigger base.

So an employee on a mid-range salary who sees “3.5% employer contribution” in their offer letter will typically see somewhere around 2.8% to 3.1% actually credited to their account. Nobody is being short-changed; the difference went to IR as tax.

One thing worth getting straight: you pay ESCT on money you contribute, not on the amount deducted from the employee’s own wages. If an employee asks you to take extra out of their pay for a super scheme, that is their contribution, not yours, and ESCT does not apply.

Who you have to contribute for

The obligation applies to employees who are KiwiSaver members and who are receiving salary or wages from you. In practice, that means most of your permanent staff, once they are past the point where they could still opt out.

Two boundary cases matter:

16- and 17-year-olds. From 1 April 2026, employer contributions became compulsory for eligible 16- and 17-year-old members. Before that date it was entirely discretionary, which in practice meant most young workers in their first job got nothing. If you employ students, casuals or apprentices in that age bracket, this was a real change to your payroll cost, and it is easy to miss because those employees rarely ask.

Employees over 65. Compulsory employer contributions do not extend past the KiwiSaver retirement age. Plenty of people keep working and keep their KiwiSaver account open, but whether you keep matching them is your decision or a matter for their employment agreement — the statutory floor does not reach them.

You also stop contributing while an employee is on an approved savings suspension, and you do not contribute for someone who is not a member at all.

Complying funds are treated the same way as KiwiSaver. These are superannuation schemes with KiwiSaver-like lock-in rules, and if an employee is in one instead, your contribution obligation and ESCT work the same way.

What happens when an employee drops back to 3%

When the rate went up, Inland Revenue opened a release valve. An employee who cannot afford the higher deduction can apply for a temporary rate reduction and keep contributing at 3% for a period of three to twelve months. They can reapply as often as they need. After twelve months, the rate resets to the default unless they apply again.

Here is the bit employers get wrong: if an employee reduces their own rate to 3%, you may match the reduced rate, but you do not have to. You can keep paying 3.5%. Either choice is legitimate, but it should be a deliberate policy decision made once, not something each payroll administrator decides case by case. Inland Revenue notifies you when an employee’s temporary reduction ends, and payroll has to pick that up on the right pay day.

Total remuneration and the trap inside it

Some employers structure packages on a total remuneration basis, where a single number covers salary plus employer KiwiSaver. That is permitted, but with a firm limit: the compulsory employer contribution must be paid on top of the package if it is not already provided for, and an employee’s take-home pay cannot be reduced because of the compulsory contribution.

In other words, you cannot solve the cost of a rate increase by quietly shifting it onto the employee’s salary. If your total remuneration agreements were written when the minimum was 3%, they are worth re-reading.

Timing, and why April catches people out

The new rate applies to pay days from 1 April, not to pay periods. A fortnightly pay period that started in late March but pays out on or after 1 April uses the new rate for the whole payment. Payroll systems that key the change off the pay period rather than the payment date will get the first run of the new financial year wrong for every employee in the file — and because the error is 0.5% of gross, it is small enough to go unnoticed for months.

Contributions are reported and paid through your usual employment information filing, on the same cycle as PAYE. Late payment attracts interest and penalties, and unpaid employer contributions are recoverable.

Where employers go wrong

• Leaving payroll on the old rate after 1 April, or keying the change to pay periods instead of pay days.
• Not switching on contributions for 16- and 17-year-old members from 1 April 2026.
• Calculating ESCT once and never revisiting it, so the rate is wrong for anyone who got a pay rise.
• Missing the end of a temporary rate reduction and continuing to contribute at the reduced rate.
• Treating employer contributions as part of a fixed salary package in a way that reduces take-home pay.
• Forgetting that voluntary contributions above the minimum are also subject to ESCT.
• Continuing contributions through a savings suspension, or failing to restart them when it ends.

Most of these are configuration and monitoring failures rather than misunderstandings of the law. They are also the ones that compound quietly across a whole employee population.

How Mercans handles this

Mercans provides managed payroll in New Zealand as part of a single global payroll platform, with KiwiSaver treated as a statutory obligation to be administered rather than a setting for the client to maintain.

What that covers in practice:

• Contribution calculation: Compulsory employer contributions are calculated at the current statutory minimum, with any agreed voluntary uplift applied consistently, and correctly excluded where an employee is on a savings suspension or otherwise outside the obligation.
• ESCT determined per employee. ESCT rates are set at the start of each tax year on the correct base — salary and wages plus gross employer contributions — and revisited as remuneration changes, rather than left static.
• Legislative changes applied for you. Rate steps like the 2026 increase and the 2028 move to 4% are built into the platform and applied on the correct pay day, so the change does not depend on someone in-house remembering it in March.
• Employee status changes tracked. Age thresholds, deduction rate changes, temporary rate reductions and suspensions are actioned in the pay run they take effect.
• Filing and reconciliation. Employment information filing and payment to Inland Revenue are managed on schedule, with contribution data reconciled before submission and retained for audit.
• One model across countries. For employers running New Zealand alongside other markets, KiwiSaver sits inside the same calendar, data set and reporting structure as every other jurisdiction — not as a local exception handled by a separate provider.

Frequently asked questions

Do employers have to contribute to KiwiSaver?

Yes, for eligible employees who are KiwiSaver members. The compulsory employer contribution is a statutory minimum, currently 3.5% of gross pay, and it must be paid on top of salary or wages. It cannot be contracted out of. The obligation does not apply to non-members, to employees on an approved savings suspension, or to those past KiwiSaver retirement age.

What is the current KiwiSaver employer contribution rate?

The minimum is 3.5% of the employee’s gross pay, effective for pay days from 1 April 2026. It replaced the previous 3% minimum and is legislated to increase to 4% from 1 April 2028. Employers can pay more than the minimum if they choose, and many do as part of their benefits offering.

Does the employee’s KiwiSaver account receive the full 3.5%?

No. Employer contributions are subject to Employer Superannuation Contribution Tax, deducted before the money reaches the fund. ESCT is applied at a rate between 10.5% and 39% depending on the employee’s salary and wages plus employer contributions, so the net amount credited is lower than the gross percentage. This applies to voluntary contributions above the minimum as well.

If an employee reduces their contribution rate to 3%, do we have to reduce ours?

No — matching a temporary rate reduction is optional. An employee can apply to Inland Revenue to contribute at 3% for three to twelve months, and you can either match that reduced rate or continue at 3.5%. The important thing is to decide this as a policy, apply it consistently, and make sure payroll picks up the reset when the reduction expires, because Inland Revenue notifies you rather than making the change for you.

Do we contribute for employees aged 16 and 17?

Yes, since 1 April 2026. Employer contributions for eligible 16- and 17-year-old KiwiSaver members are now compulsory at the same minimum rate as everyone else. This is separate from the earlier change that made this age group eligible for the government contribution, which took effect on 1 July 2025 and is not an employer obligation.

Can KiwiSaver be included in a total remuneration package?

It can, but only within limits. The compulsory employer contribution must be paid on top of the package if the package does not already include it, and the arrangement cannot leave the employee with less take-home pay than they would otherwise have received. Total remuneration agreements drafted under the old 3% minimum should be reviewed, since the increase cannot be absorbed by reducing salary.

What is the difference between the employer contribution and the government contribution?

They are unrelated payments from different payers. The employer contribution is your obligation, calculated as a percentage of gross pay and paid every pay cycle. The government contribution is an annual top-up paid by the Crown directly to the member — 25 cents for each dollar the member contributes, capped at $260.72 a year, and not available to members with prior-year income above $180,000. Employers have no role in claiming or administering it.