KiwiSaver Fee Drag Calculator

How KiwiSaver fee drag works

KiwiSaver management fees are usually charged as a percentage of your total balance, taken out automatically each quarter or year, regardless of whether your fund made money or lost money over that period. On a small balance the dollar amount looks trivial. A 1% fee on a $5,000 balance is only $50 a year. The problem is that your balance does not stay small, and the fee is not a one-off charge. Every dollar taken out in fees is a dollar that stops earning a return for every year you have left until you need the money. A 0.5 percentage point fee difference does not cost you 0.5% once, it costs 0.5% of an ever-growing balance every single year, for decades. This calculator isolates that effect. It takes the same starting balance, the same annual contributions and the same assumed investment performance, and runs the projection twice, once at your current fund's fee and once at an alternative fee, so the only thing that differs between the two results is the cost of the fee itself.

Worked example

Take someone aged 35 with a $25,000 KiwiSaver balance and a $70,000 salary, contributing 3.5% themselves ($2,450 a year), matched by 3.5% from their employer ($2,450 a year), plus the maximum government contribution of $260.72 a year, since their own contribution of $2,450 already clears the $1,042.86 needed for the full match. That is $5,160.72 added every year. They are in a Growth fund, which this calculator assumes returns 4.5% a year net of fees and tax, and they are paying a 1.00% annual fee. Left for 30 years, that balance grows to about $408,473.

If the same person had instead been in a fund charging 0.35% a year, and both funds achieved the same gross investment performance, the net return becomes 5.15% instead of 4.50%, and the balance grows to about $464,613, a difference of roughly $56,140 for a fee gap of only 0.65 percentage points. None of that difference comes from picking a better-performing fund. It comes entirely from paying less to hold the same investments.

What this calculator assumes

• Investment returns of 2.5% (Conservative/Defensive), 3.5% (Balanced), 4.5% (Growth) or 5.5% (Aggressive) a year, the standard long-run projection figures used in KiwiSaver Fund Updates, already net of typical fees and after tax at the 28% PIR.
• Your entered fee difference is applied directly to that return, on the basis that both funds you are comparing achieve the same gross investment performance before fees.
• Contributions are added once a year and compound at the same rate as the rest of the balance, an approximation of a regular pay-cycle contribution.
• The fee percentage and your PIR stay constant for the whole period; in reality your PIR can change with your income, and fees can change if your provider reprices its fund.
• No cost or time out of the market is allowed for switching funds. Most KiwiSaver switches in New Zealand are free, but always check with your provider.
• Results are a projection based on the figures you enter, not a forecast or a promise of future performance.

Why a small fee difference matters so much

Fees and investment returns behave the same way inside the compounding formula, just in opposite directions. A return of 4.5% and a fee of 1.0% do not simply net out to a fixed 3.5% forever. Because the fee is deducted from a balance that would otherwise keep compounding, the true cost of that 1% grows larger every year you stay invested. That is why the gap between two KiwiSaver funds looks small on a fund fact sheet, often stated to two decimal places, but turns into tens of thousands of dollars once it is projected across a 20 or 30 year working life. It also explains why comparing funds on headline return alone can be misleading. A fund that returns 6% before fees but charges 1.5% nets you the same 4.5% as a fund that returns 5% before fees and charges 0.5%. No one can guarantee a future return, but the fee is the one part of this equation you can compare and choose today.

How to check your own KiwiSaver fees

Every KiwiSaver scheme must publish a Fund Update every quarter, a short standardised document required under the Financial Markets Conduct Regulations 2014, showing the fund's actual annual fee and its returns after fees and tax for the past 1, 5 and 10 years where available. You can find your own fund's Fund Update on your provider's website, or compare funds across every scheme using the Sorted KiwiSaver Fund Finder at sorted.org.nz, a free tool from Te Ara Ahunga Ora, the Retirement Commission. Once you know your fund's actual fee, enter it into this calculator alongside a fee you are considering switching to, to see whether the difference is worth acting on.

Who this calculator is for

This is for any KiwiSaver member comparing providers or fund options, particularly anyone who has not checked their fund's fee since they joined years ago, or anyone weighing up switching to a lower-cost provider and wanting to see the dollar figure rather than just the percentage. It is also useful context for anyone choosing a more growth-oriented fund for a long time horizon, since the fee gap compounds for longer the more years there are left to run.

Frequently Asked Questions about KiwiSaver fee drag

How much can KiwiSaver fees really cost me over 30 years?

A fee gap well under one percentage point a year can cost tens of thousands of dollars over a KiwiSaver lifetime, because the fee compounds against a growing balance every year, not just once. See the worked example above.

What is fee drag?

Fee drag is the ongoing reduction in your return caused by a percentage-based fee, and the compounding effect that has over time. A 1% fee does not cost 1% once, it costs 1% of your balance every year you stay invested.

Are KiwiSaver fees taken from my balance or only from my gains?

Most funds charge their percentage fee on your total balance, deducted regardless of whether the fund gained or lost value that period. Some also charge a small fixed member fee on top. Check your provider's Fund Update for the exact structure.

What return assumptions does this calculator use?

The standard long-run figures used in KiwiSaver Fund Updates: 2.5% for Conservative/Defensive, 3.5% for Balanced, 4.5% for Growth and 5.5% for Aggressive, each net of typical fees and after tax at the 28% PIR.

Does a higher fee always mean worse performance?

Not necessarily. Some higher-fee funds are actively managed and aim to outperform after fees, though long-run evidence is mixed. A higher fee is only a problem when it is not matched by higher performance, which is what this calculator isolates by holding performance constant.

How do I find out my KiwiSaver fund's actual fee?

Check your fund's quarterly Fund Update, free on your provider's website, or compare funds side by side using the Sorted KiwiSaver Fund Finder.

Is it worth switching KiwiSaver funds just to save on fees?

Usually, if the fund invests in a similar way to your current one and still suits your risk tolerance and time horizon. Most switches in New Zealand are free and take around ten working days, but check your current provider does not charge an exit fee.

Does switching funds affect my government or employer contributions?

No. Your employer, your own and the government contribution depend on your income and contribution rate, not on which provider or fund you use. Switching only changes your return and fee, not your contribution entitlements.

Related calculators

• KiwiSaver Fee Calculator: see your fund's actual monthly and yearly fee cost in dollars today.
• KiwiSaver Fund Type Comparison: compare Conservative, Balanced, Growth and Aggressive funds side by side.
• KiwiSaver Retirement Projection: project your full balance forward to age 65.
• KiwiSaver Contribution Rate Calculator: see the effect of changing your own contribution rate.
• KiwiSaver Calculator: the general-purpose calculator covering contributions and balance growth.
• KiwiSaver Fees Explained: background on this topic.

Official NZ sources

This calculator is built from primary New Zealand sources. Always confirm current figures against the official source for your situation:

• Financial Markets Authority: KiwiSaver Fund Updates and standard projection assumptions
• Sorted (Te Ara Ahunga Ora, Retirement Commission): KiwiSaver Fund Finder
• Inland Revenue (IRD): KiwiSaver contribution rates and government contribution
• KiwiSaver official government site: kiwisaver.govt.nz