How does KiwiSaver work?

KiwiSaver is a voluntary, government-supported savings scheme that most working New Zealanders end up in, often without fully choosing it. Over 3 million people are members, but many were auto-enrolled by an employer and never got a clear answer to how KiwiSaver works in practice. This guide outlines what KiwiSaver actually is, how to join and how contributions and the government top-up work. It also outlines what happens if you need to pause payments, how your money gets invested and when you're allowed to take it out. If you've already got KiwiSaver sorted and want to go deeper, see our dedicated guides on choosing a KiwiSaver provider and using KiwiSaver for retirement.

What Is KiwiSaver?

KiwiSaver is a voluntary savings scheme created by the New Zealand Government in 2007, designed to help people save for retirement or a first home. It's not a compulsory tax or a government fund, so your KiwiSaver balance is your own money, invested through a provider you choose (or get assigned to by default). The scheme has grown into one of the largest pools of retirement savings in the country. According to the Financial Markets Authority's KiwiSaver Annual Report, total funds under management across all KiwiSaver providers reached $123.1 billion in the year to March 2025,with average member balances up 11.3% on the year before.

Is KiwiSaver Compulsory?

KiwiSaver is voluntary, but new employees aged 18 to 65 are automatically enrolled by their employer, which is why it can feel compulsory. Once you're auto-enrolled, you have a limited window to opt out if you don't want to be a member.

You can't opt out in the first 13 days. As per the  Inland Revenue's guidance, the opting-out window runs from day 14 to day 56 after you start (week 2 to week 8). If you miss that window, you're locked in unless you meet specific late-opt-out exceptions. Otherwise, taking a savings suspension is your next option (more on that below). If you're self-employed, under 18 or not currently working, you were never auto-enrolled in the first place, so there's nothing to opt out of.

How to Join KiwiSaver

Joining KiwiSaver means meeting two eligibility rules and then either being auto-enrolled or opting in directly. To be eligible, you need to live (or normally live) in New Zealand and be a New Zealand citizen or entitled to stay indefinitely, according to the IRD's KiwiSaver eligibility guidance. If you're starting a new job, your employer handles it. You'll get a KiwiSaver deduction form (KS2) and be enrolled automatically if you're 18 to 65. If you're self-employed, under 18 or not currently working, you can still join by contacting a KiwiSaver provider directly, like the Sharesies KiwiSaver Scheme. If you don't actively choose a scheme, one gets chosen for you (either your employer's preferred scheme, or a default provider assigned by IRD). You're never locked in and can switch providers at any time. Our guide to choosing a KiwiSaver provider covers the criteria that actually matter if you're deciding where to land.

How KiwiSaver Contributions Work

KiwiSaver contributions come from three sources: you, your employer, and (up to a point) the government. You choose your own contribution rate (3.5%, 4%, 6%, 8% or 10% of your before-tax pay) and your employer matches with a minimum of 3.5%, rising to 4% from 1 April 2028. The government adds 25 cents for every dollar you contribute yourself, up to $260.72 a year, as long as you earn $180,000 or less annually. You can also top up with voluntary contributions directly through your provider or online banking whenever you like.

Can You Pause Your KiwiSaver Contributions?

Pausing your KiwiSaver contributions is called a savings suspension, and it lets you stop your own contributions for a set period without opting out entirely. You can apply for a suspension of 3 to 12 months at a time, and reapply when it ends if you still need it. If you've been a KiwiSaver member for less than a year, the default suspension period is capped at 3 months. A savings suspension only pauses your own contributions. Your employer stops matching too, and you won't get the government contribution during that time, but your existing balance stays invested and keeps working.

How Is Your KiwiSaver Money Invested?

Your KiwiSaver balance is invested in a fund (or funds) through your provider, usually pooled together with other members' money and put into assets like shares, bonds and bank deposits. Funds typically fall into five risk categories:  defensive & conservative (lower risk, cash and bonds), balanced (a mix), growth (higher risk with higher long-term return potential) and aggressive (higher risk with higher long-term return potential) . For a fuller breakdown, see what risk actually means for your KiwiSaver.

Some providers, including Sharesies, offer a self-select structure. See our base funds and self-select pages for how that works. Because your balance is invested rather than sitting in a bank account, its value moves with the market. It can go up as well as down, which is worth understanding before you pick a fun

When Can You Withdraw Your KiwiSaver Balance?

KiwiSaver is designed to stay locked in until you turn 65 or buy your first home, with a small number of early-withdrawal exceptions for serious circumstances. Withdrawal reasons include retirement at 65, a first-home purchase, significant financial hardship, a serious illness or life-shortening condition, bankruptcy and permanent emigration (with a transfer option if you're moving to Australia). Retirement and first-home withdrawals are by far the most common. Our guide to using KiwiSaver for retirement covers withdrawal timing and process at 65 in detail, and IRD's guidance on early withdrawals covers hardship, illness, and emigration cases.

What KiwiSaver Can't Be Used For

KiwiSaver can't be withdrawn to buy a car, pay off general debt, start a business or purchase an investment property. The first-home withdrawal only applies to a home you'll live in, not an investment property, and the hardship provision has its own strict eligibility test rather than covering everyday debt. If you're short on cash for one of the above reasons, KiwiSaver usually isn't the answer. The significant financial hardship withdrawal exists for genuine, demonstrated financial need, not general expenses, and applying without meeting the criteria will simply be declined.

Frequently Asked Questions

What is KiwiSaver?

KiwiSaver is a voluntary, government-supported savings scheme created in 2007 to help New Zealanders save for retirement or a first home. Contributions come from you, your employer and the government (up to a threshold), and your balance is invested through a KiwiSaver provider you choose.

Is KiwiSaver compulsory?

No. KiwiSaver is a voluntary savings scheme, but new employees aged 18 to 65 are automatically enrolled by their employer. You can opt out between day 14 and day 56 of starting work. If you miss that window, you’ll be a member until you meet the criteria for a late opt-out or take a savings suspension instead.

How do I join KiwiSaver?

Most people join automatically when they start work for the first time.. If you're self-employed, under 18 or not currently working, you can join directly by contacting a KiwiSaver provider. You don't need an employer to become a member.

Can I use my KiwiSaver to buy a car or pay off debt?

No. KiwiSaver can only be withdrawn for retirement, a first home you'll live in, significant financial hardship, serious illness, bankruptcy or permanent emigration. Everyday expenses like a car purchase or general debt repayment don't qualify under any of these categories.

Can I pause my KiwiSaver contributions?

Yes, through a savings suspension. You can pause your own contributions for 3 to 12 months (capped at 3 months if you've been a member less than a year) and reapply if you need longer. Your balance stays invested while contributions are paused, but you won't get the government or employer contribution during that time.

Getting the Most Out of KiwiSaver

How KiwiSaver works in practice is that it’s mostly voluntary but auto-enrolled by default and locked in until 65 or you buy a first home. It’s funded by you, your employer and the government, and invested in a fund or funds you select, with a savings suspension available if you need to pause along the way. Understanding the mechanics is the easy part, but choosing the right provider and fund for your own situation is where it actually pays off. If you want more control over how your KiwiSaver balance is invested, the Sharesies KiwiSaver Scheme lets you choose a base fund and add your own picks on top if you want to.Try  making a plan for free to see what that could look like for you.