Most people pick a KiwiSaver provider once, in a hurry, and never look at the fund again. That's understandable, because the choice feels technical. But the fund you're in does more to shape your balance at 65 than almost anything else you control, apart from how much you put in. This guide walks through the five fund types, how time horizon changes the answer, what fees really cost, and how contributions and government top-ups fit in. It's general information, not personal advice.
What a KiwiSaver fund actually is
A KiwiSaver fund is a pool of investments run by your provider. Your money is mixed with other members' money and spread across things like cash, bonds, shares and property. The fund's mix decides how much it can grow and how much it can fall.
The key trade-off is simple. Assets that grow more over the long run, mainly shares, also bounce around more along the way. Assets that stay steady, like cash and term deposits, tend to grow more slowly. No fund gets you high growth with low risk, and anyone who says otherwise is selling something.
The five fund types
Providers use slightly different labels, but most funds fall into one of these groups. The split between "income" assets (cash and bonds) and "growth" assets (shares and property) is what separates them.
Defensive
Almost all income assets, mostly cash and short-term bonds, with little or no share exposure. Values move the least, but growth is usually modest. It can struggle to keep up with rising prices over many years.
Conservative
Mostly income assets with a small slice of growth assets, often around 15 to 30 percent. Still fairly steady, with a bit more upside than a defensive fund.
Balanced
Roughly half and half, though it varies by provider. You'll see real ups and downs in a bad year, with decent growth over a decade or more.
Growth
Mostly shares and property, often around 70 to 80 percent, with the rest in income assets. Expect noticeable falls in weak markets and higher long-run growth in return.
Aggressive
Nearly all growth assets, often 90 percent or more. The biggest swings both ways. Suited to people with a long time before they need the money and the stomach to sit tight when balances drop.
Check each fund's disclosure documents for its actual asset mix and target range. Two funds both called "balanced" can hold quite different things.
Match the fund to your time horizon
The question isn't "how brave am I?" so much as "when do I need this money?" A fund that dips 15 percent is a nuisance if you won't touch the money for 30 years. It's a real problem if you're buying a house next year.
- Retirement at 65, many years away: time gives you room to ride out market falls, so higher-growth funds are often considered. Someone in their 20s has decades for recoveries to happen.
- First home in the next few years: a market drop close to purchase can shrink your deposit with no time to recover. Many people in this position look at more conservative options.
- Close to retirement: the balance is large and there's less time to rebuild after a fall, so many people shift toward steadier funds. But you may still be invested for 20 or more years after 65, so going fully defensive isn't automatically right either.
Practical tip: Write down the date you expect to need the money, and what you'd do if your balance fell 20 percent next month. If the honest answer is "panic and switch to cash", that tells you more about your right fund than any questionnaire.
Fees: small numbers, big effect
Fees come out of your balance, and they compound just like returns do, only in the wrong direction. A difference of half a percent a year sounds trivial. Over 40 years it isn't.
Percentage fees and fixed fees
Most funds charge a percentage of your balance each year. Many also charge a small fixed administration fee, often a few dollars a month. Fixed fees hit small balances harder, so they matter more when you're young or earning less. Percentage fees bite harder as your balance grows.
Comparing fees properly
Don't compare headline percentages alone. Use the Smart Investor tool at sorted.org.nz. It lets you compare funds on fees and performance, and it estimates fee costs for your situation.
When two funds are genuinely similar, the lower fee wins.
Returns after fees, and why the past isn't a guide
When you compare returns, look at figures after fees and after tax, over the same time period, for funds with a similar risk level. Comparing a growth fund's five-year return with a conservative fund's is meaningless.
Also be wary of last year's winner. Funds that top the table in one period often sit mid-pack in the next, and the disclosure documents say as much. There's a reason for that. A long record can tell you something about how a fund behaves in rough patches. It can't promise what comes next.
The default fund: a starting point, not a recommendation
Since December 2021, default funds have been balanced funds, with roughly half in growth assets. If you were placed in a default fund before then, it may have been a conservative fund and you might still be in it, unless your provider moved you or you chose something else. The details depend on your provider and when you joined.
A balanced default is a reasonable middle ground, but it was chosen for a typical member, not for you. For a younger member with decades to go, it may mean less growth than their timeline would suggest. For someone buying a home soon, it may carry more risk than they want. The point is that the default was a placeholder, so it's worth checking that your fund is a choice you've actually made.
A worked example: two members, 40 years, one big difference
Here's an illustration, not a forecast. Imagine two people who both start at 25 and keep going to 65. Each has about $5,000 a year going in, counting their own contributions, their employer's and any government top-up.
- Member A stays in a growth fund and, for the sake of the example, earns an average of 6 percent a year after fees and tax.
- Member B stays in a conservative fund and earns an average of 3 percent a year after fees and tax.
On those assumptions, Member A ends up with about $770,000 at 65 and Member B about $380,000. The contributions are identical. The only difference is the average return.
Now the caveats, which matter. These return figures are assumptions picked to show the mechanism, not predictions. Real returns aren't smooth: Member A would have lived through several years of falling balances, and might have had a rough run right before retirement. Contributions would also rise with pay in real life. The example ignores inflation, which means the future dollar amounts buy less than today's.
The same maths shows what fees do. If Member A's fund charged half a percent more each year, taking the average return from 6 percent to 5.5 percent, the balance at 65 would drop to roughly $680,000. That's about $90,000 lost to a difference that looks tiny on paper.
Contribution rates matter as much as the fund
Members can choose to contribute 3, 4, 6, 8 or 10 percent of their pay. Under changes announced in Budget 2025, the default employee and employer rates rose to 3.5 percent from 1 April 2026 and are due to rise to 4 percent from 1 April 2028. Employees can apply to temporarily stay on 3 percent. Rules like this can be adjusted and have specific detail, so check the current position on the IRD website and with your employer.
The government contribution
If you're eligible, the government adds to your KiwiSaver each year. Budget 2025 halved the rate to 25 cents for every dollar you contribute, up to a maximum of $260.72 a year, from 1 July 2025. It also removed the contribution for people with an income over $180,000. Eligibility rules (such as age and residency) also apply. Check the current details with IRD, since this is the sort of thing that can change.
The practical point: to get the full amount you generally need to put in about $1,043 over the contribution year (1 July to 30 June). Part-year or low contributions may mean you miss out on some of it.
Contribution holidays are now savings suspensions
What used to be called a contribution holiday is now a savings suspension. It lets you pause your own contributions for a period if money's tight. While you're paused you also miss out on employer contributions and the government contribution, so it's best used as a short-term measure and not a default.
Ethical and responsible investing
Many providers offer funds that screen out certain industries, such as fossil fuels, tobacco, weapons or gambling, or that favour companies with strong environmental and governance practices. Approaches vary a lot. "Responsible" can mean different things in different funds, so read the fund's own description of what it excludes and what it actively looks for.
Using KiwiSaver for a first home
If you've been in KiwiSaver for at least three years, you may be able to withdraw most of your balance toward a first home, with some conditions. Settings have changed over time, so confirm the current rules with your provider and IRD before planning around them. If a purchase is coming within a few years, this is also the moment to revisit whether your fund's risk level still suits.
How to switch funds or providers
Switching is generally free, though you should check your provider's terms. Switching funds within the same provider is usually done online in a few minutes. Switching providers means joining the new one, who then arranges the transfer of your whole balance. You can only be with one provider at a time, so don't close your account yourself.
Key takeaways
- Your fund's risk level should follow when you need the money, not how you feel this week.
- Defensive to aggressive describes the mix of income and growth assets. Check each fund's actual numbers.
- Fees compound. Compare similar funds using the Smart Investor tool at sorted.org.nz.
- Look at returns after fees and tax, over the same period and the same risk level. Past performance doesn't predict future results.
- If you never chose a fund, you're probably in the default. Check that it suits you.
- Contribution rates and the government contribution have changed recently. Confirm the current rules with IRD.
- Switching is generally free, but check your provider's terms first.
Choosing a KiwiSaver fund doesn't have to be a guessing game. A licensed financial adviser can look at your goals, timeline and circumstances and give you advice that's actually about you. If you'd like a hand, book a free consultation with Good Money at good-money.co.nz. We'll talk it through in plain English, with no pressure.