How to Change Your KiwiSaver Contribution Rate in NZ: 3%, 4%, 6%, 8% or 10% Explained

From April 2026 the selectable KiwiSaver rates are 3.5%, 4%, 6%, 8% or 10%. Here is how to change yours with a KS2 form, when it takes effect, and why a higher rate won't lift your employer match.

Changing how much you put into KiwiSaver is one of the simplest moves you can make, and one of the most overlooked. You pick a percentage of your before-tax pay, tell your employer, and it shows up on your next payslip. The options changed in 2026, so it is worth knowing what you can choose and what each rate actually does.

This guide explains the rates available now, the KS2 process for changing yours, how soon it lands on your pay, why going higher than the minimum does not increase your employer's contribution, and how to think about which rate fits your goals.

What contribution rates can you choose in NZ?

TL;DR: As at April 2026 employed KiwiSaver members can choose 3.5%, 4%, 6%, 8% or 10% of gross pay. ¹ You change it with a KS2 form given to your employer, effective from your next pay. ³ Going above 3.5% does not increase your compulsory employer match, which is fixed at 3.5%. ⁴

If you are employed, your KiwiSaver contribution is a set percentage of your gross (before-tax) pay. As at 3 April 2026 the rates you can select are 3.5%, 4%, 6%, 8% or 10%. ¹

The old 3% rate is no longer a standard selectable option. The minimum and default rate rose from 3% to 3.5% on 1 April 2026, and members who were sitting on the old 3% default were moved up to 3.5% automatically from their first pay on or after that date. ² The rate is scheduled to rise again, with the minimum stepping up to 4% on 1 April 2028. ²

3% has not vanished entirely. If you genuinely cannot afford the higher minimum, you can apply to Inland Revenue (IRD) for a temporary reduction back to 3% lasting 3 to 12 months — more on that below. ⁹ But it is no longer something you can simply select on a KS2 form; it now requires an application. ¹

How do you change your KiwiSaver contribution rate?

The process is straightforward and does not need IRD approval for a standard change. ³

1. Tell your employer your new rate. The formal way is to give them a completed KS2 form (KiwiSaver deduction form), but most employers will accept written notice of your new rate. ³

2. Your employer updates your payroll to deduct the new percentage. ³

3. The new rate applies from your next pay, or as soon as your employer can practicably action it. ³

You do not need to contact IRD for a standard rate change between the selectable options. ³ The only time IRD is involved is the temporary reduction to 3%, which is a separate application. ⁹

If you have more than one job, you can set a different rate for each employer — give a KS2 to each one. The selectable rates are the same for each.

How quickly does a rate change take effect on your pay?

A standard change generally applies from your next pay, or as soon as the employer can practicably action it in their payroll system. ³ In practice that often means one full pay cycle, depending on when in the cycle you hand over the KS2 and how your employer's payroll is set up.

There is no waiting period imposed by IRD and no minimum time you have to stay on a rate before changing again. The limiting factor is simply your employer's payroll run.

Does a higher rate get you a bigger employer match?

This is the point most people get wrong, so it is worth being clear. No — choosing 6%, 8% or 10% does not increase your compulsory employer contribution. ⁴

The compulsory employer contribution rose to 3.5% of your gross pay from 1 April 2026 (rising to 4% from 1 April 2028). ⁴ Your employer is only required to contribute at that minimum percentage, regardless of how high you set your own rate. ⁴ So if you contribute 8% while your employer contributes 3.5%, the extra 4.5% is entirely your own money.

To put it plainly:

• At 3.5%, you put in 3.5% and your employer matches 3.5% — total 7% of gross pay.
• At 8%, you put in 8% and your employer still contributes 3.5% — total 11.5% of gross pay, but the extra is all yours.

That does not make a higher rate a bad idea. It simply means the reason to go higher is to save more of your own money, not to unlock more employer money. There is no employer match to "max out" beyond 3.5%.

One related change worth knowing: from 1 April 2026, employer contributions were extended to eligible employees aged 16 and 17, who previously did not receive them. ⁵ If you have a working teenager in the household, getting them enrolled and contributing means they now pick up the employer contribution too.

For more on how the rate rise and matching work together, see our guide on the KiwiSaver contribution rate increase from 3.5% to 4%.

Which rate should you choose for your goals?

There is no single right rate. The one that suits you depends on your timeframe, your retirement goal, your other financial priorities, and what your household budget can comfortably carry. Here is how to think about each.

The table below is an illustration only, modelled at a $70,000 income to show the trade-off between weekly take-home pay and long-run balance. Actual results will differ.

What each contribution rate costs your take-home and adds to your balance

Illustration at $70,000 gross income. Weekly cost is the employee contribution from after-tax pay; balance at 65 is modelled, not a prediction. Modelled from IRD rates and a typical long-run growth-fund return, 2026.

Projections are illustrations based on stated assumptions, are not predictions, and actual results will differ. Returns are not guaranteed and the value of investments can go down as well as up.

A few things many people weigh up:

• People earlier in their working life sometimes choose a higher rate because contributions made young have decades to compound, though competing goals like a first home or paying down debt also matter.
• People with a mortgage or young children often stay nearer the default while those costs are heavy, then lift the rate later.
• People approaching 65 sometimes increase the rate in their final working years to add to the balance, while being mindful that money locked in KiwiSaver is generally not accessible until 65.

The honest trade-off is liquidity. Money you put into KiwiSaver is, for most people, locked away until 65 (with limited exceptions such as a first-home withdrawal or significant hardship). A higher rate builds your retirement faster but reduces the cash in your hand each week. A growth fund may suit people with a longer time horizon and higher risk tolerance, though with more short-term ups and downs — your situation will differ, and personalised advice works through what fits you.

How the 2026 default rate change affects your choice

If you do nothing, you are now contributing at 3.5%, not the old 3% — the change happened automatically from your first pay on or after 1 April 2026. ² So "staying put" already means a slightly higher contribution than last year.

There is a useful side effect for the government contribution. To receive the full annual government contribution of $260.72, you need to put in at least $1,042.86 of your own money between 1 July and 30 June. ⁶⁷ At 3.5%, that threshold is cleared once your income is above roughly $29,796 a year ($1,042.86 ÷ 3.5%). ¹⁰ So most employed people on the default rate are already contributing enough to bank the full top-up.

A few eligibility points on that government contribution: it pays 25 cents for every $1 you contribute, up to the $260.72 cap. ⁶ It is available to members aged 16 to 65 with annual taxable income of $180,000 or less — people earning above $180,000 no longer qualify. ⁸ Employer contributions, past government contributions and Australian scheme transfers do not count toward the $1,042.86 you need. ⁷ If you are self-employed or paused contributions partway through the year, it is worth checking you will reach the threshold before 30 June — see our guide on the government contribution top-up deadline.

Can you change your rate as often as you like?

There is no IRD-imposed limit on how often you can change between the selectable rates, and no minimum period you must stay on a rate. ³ The practical constraint is your employer's payroll: each change needs to be actioned in a pay run, so very frequent switching is more hassle than help.

The temporary reduction to 3% works differently. It is an application to IRD, lasts a set period of 3 to 12 months, and you must reapply if you want to extend it. ⁹ Applications for the temporary reduction opened from 1 February 2026. ⁹ If you go onto the reduced 3% rate, your employer may choose to match at 3%, or may keep contributing at 3.5% — that part is up to them. ⁹

For most people, the sensible approach is to set a rate you can sustain rather than changing it constantly. If money is genuinely tight, the temporary reduction is a better-defined tool than repeatedly dropping and lifting your rate.

Getting your rate right alongside fund choice

Your contribution rate is one of two big levers. The other is the fund you are in. For many people, the choice of fund and the fees they pay move their long-run balance as much as, or more than, a step up in contribution rate — because the fund determines the return that compounds on every dollar you put in.

The major independent and bank-run schemes — the likes of Booster, Milford, Generate, Fisher Funds, Kernel and Simplicity — differ meaningfully on fees, fund range and long-run returns, so the scheme you are in matters alongside the rate you choose. Bank-run and specialist schemes differ in fee structure and fund choice; here is how to compare them in our guide on fund choice versus contributions and on how to choose a KiwiSaver fund.

Past performance is not a reliable indicator of future performance, and returns are not guaranteed. The point is simply that rate and fund are best decided together, not in isolation.

Frequently asked questions

What KiwiSaver contribution rates can I choose in 2026?

As at April 2026 the selectable rates are 3.5%, 4%, 6%, 8% or 10% of your gross pay. The old 3% rate is now only available by applying to IRD for a temporary reduction. ¹

How do I actually change my rate?

Give your employer a completed KS2 form, or notify them of your new rate. They update payroll and the new rate applies from your next pay, or as soon as they can practicably action it. Standard changes do not need IRD approval. ³

Will contributing more than 3.5% get me more from my employer?

No. The compulsory employer contribution is fixed at 3.5% of gross pay (rising to 4% in 2028), regardless of how high you set your own rate. Anything above 3.5% is entirely your own money. ⁴

Can I go back to 3%?

Only by applying to IRD for a temporary reduction, which lasts 3 to 12 months and can be reapplied for. Applications opened from 1 February 2026. While you are on it, your employer may match at 3% or stay at 3.5%. ⁹

Do I still get the full government contribution at 3.5%?

If you are employed and earn above roughly $29,796 a year, contributing at 3.5% already puts in more than the $1,042.86 needed for the full $260.72 government contribution. Earn less and you may need to top up. ⁷¹⁰

How often can I change my rate?

There is no IRD limit on how often you switch between the selectable rates. The only real constraint is your employer's payroll cycle. The temporary 3% reduction is the exception, as it runs for a set period. ³⁹

General information, not personalised financial advice. Seek advice tailored to your situation before acting. Craig Smith Business Services Ltd (FSP712931), trading as Smiths Financial, holds a Class 2 licence issued by the Financial Markets Authority and is a member of the Financial Dispute Resolution Service (FDRS). KiwiSaver is a long-term savings scheme; government contributions, contribution rates and tax settings are set by the Government and can change — figures are correct as at 3 April 2026, so check current rules at ird.govt.nz and sorted.org.nz. Written by Henry Smith, Financial Adviser; reviewed by Craig Smith, Principal Adviser. Last reviewed 3 April 2026.