If you’ve ever chosen a KiwiSaver fund based on your age or how far off retirement or purchasing your first home you are, you’ve made a sound first decision. Growth funds through your accumulating years, moving toward balanced and conservative as you near key milestones: that guidance holds true and remains the right starting point.
But there’s a second decision that gets far less attention, and over time it can matter just as much: which provider is managing that fund for you.
KiwiSaver returns are volatile quarter to quarter, so the real story is in the longer term. Morningstar, an independent research firm that tracks KiwiSaver fund performance each quarter, publishes average annualised returns by category over 10 years, and the differences between risk categories are clear: aggressive funds have returned an average of 8.9 percent per year, growth funds 7.9 percent, balanced funds 6.4 percent, moderate funds 4.4 percent, and conservative funds 3.9 percent.
But these are category averages, and averages hide a wide spread of outcomes between individual providers offering the very same type of fund. Morningstar’s most recent survey (for the quarter ending March 2026) shows just how wide that spread can be. Among growth funds, the gap between the best and weakest performer was around 3.3 percentage points a year over 10 years, roughly 7.5 points a year over five years, and around 9 points a year over three years. Balanced funds told a similar story: a gap of roughly 2.3 points a year over 10 years, close to 5.5 points a year over five years, and around 5.2 points a year over three years.
Put simply, two people who both chose a growth fund, or both chose a balanced fund, could have ended up with meaningfully different outcomes purely based on who was managing their money, even though their risk profile and fund label looked identical on paper.
Here’s what that spread looks like in real terms. Imagine someone who, a decade ago, had a $50,000 balance sitting in a growth fund. They contributed 3 percent of a $150,000 salary, their employer matched that with a further 3 percent, and for simplicity, we’ve applied today’s government contribution rate of $260.72 a year throughout (the actual rate was higher for most of this period, reducing only from 1 July 2025).
Depending on which provider held that growth fund, the same person could be sitting on anywhere between roughly $219,000 and $274,000 today. Same salary, same contributions, same fund type, same government support assumption. A gap of close to $55,000, entirely down to which provider was managing the money.
Interestingly, the spread tends to narrow over the very longest periods. A single strong or weak year can distort short-term figures, but over a decade those swings average out. This is exactly why Morningstar’s own commentary cautions that this year’s best performers can easily be next year’s worst, and why five and ten-year figures are a far more reliable basis for comparison than any single year.
Providers managing funds in the same category still make different calls: how much to invest offshore versus locally, active management versus tracking an index, asset allocation within the category’s parameters, and what they charge in fees. Over a five or ten-year horizon, these choices compound into materially different balances at retirement, even when two funds carry the same growth or balanced label and a broadly similar risk profile.
Choosing the right fund type for your age, stage and goals is step one. But making sure that also monitor the mid-to-long term performance of your KiwiSaver provider is also important – you can’t just assume that because you are with a well-known name or a large provider that they are delivering competitive returns.
Our team can help you review your KiwiSaver fund and performance to make sure you are in a fund that matches your personal objectives. A review is free and only takes about 30-minutes. There is no obligation to take action, but if you do decide to move to an alternative provider, the switching process is also relatively quick and simple. To book your free review, click here.
This article is general information only and doesn’t take into account your personal financial situation or goals. The dollar figures above relate specifically to a growth fund example and assume a constant rate of return over the full period, which does not reflect how markets actually behave. They also apply the current government contribution rate of $260.72 per year throughout the ten-year example for simplicity, though this rate was higher for most of that period and only reduced from 1 July 2025. Past performance is not a reliable indicator of future returns. Please speak with one of our advisers before making any changes to your KiwiSaver.
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