The KiwiSaver 'Set and Forget' Myth

“Set and forget” is useful advice when it means not reacting to every market fall. It becomes poor advice when it means ignoring KiwiSaver for decades. A sound review is prompted by a change in the member's life, time horizon, tax position, or plan, not by this week's investment return.

What the market should not trigger

The clearest New Zealand evidence came from the COVID-19 sell-off. FMA-commissioned research found that 58,356 members in its sample made 88,112 fund switches between February and April 2020. Switching activity was 2.7 times higher than in the comparable 2019 period.^[1] Many members moved after seeing balances fall, converting a temporary market decline into a change in long-term strategy.

By August 2020, only 9.1% of those who had moved to a lower-risk fund had switched back to a higher-growth setting.^[1]That matters because a fund switch after a fall can lock in losses and leave the member too conservatively invested for the years that follow. A market decline alone does not shorten a member's investment horizon or change the purpose of the money.

Review KiwiSaver when life changes, not whenever markets become uncomfortable.

What should trigger a review

A shorter time horizon.A first-home withdrawal, retirement, or another permitted withdrawal expected within the next few years can change the amount of market volatility a member can sensibly carry. The relevant question is when the money is likely to be needed, not the member's age in isolation.

A material income or employment change.A promotion, parental leave, redundancy, a move into self-employment, or a return from overseas can affect contribution arrangements and the correct Prescribed Investor Rate. IRD calculates an individual's PIR using income from the previous two income years, so the correct rate can lag behind a life change unless it is checked.^[2]

A change in financial capacity. A new mortgage, separation, dependent children, an inheritance, or a business sale can alter how much volatility the wider household can absorb. Risk tolerance describes how a fall feels. Risk capacity describes whether the plan can withstand it. A review should consider both.

A change in the job the account must do. KiwiSaver can move from a distant retirement asset to a first-home deposit, then later from an accumulation account to a retirement income source. The fund, fees, contribution settings, and withdrawal plan need to be assessed against that current purpose.

Estate and administration changes.KiwiSaver savings generally become part of the member's estate on death. They are not redirected simply by naming a preferred person with a provider. The person administering the will should know which provider holds the account and how to contact it.^[3] A marriage, separation, or new child is a sensible prompt to review the will and the wider estate plan with a lawyer.

The annual habit

Even without a major life event, the annual member statement creates a useful review point. It shows contributions, fees, tax, returns, and the projected retirement balance. The FMA reported that KiwiSaver assets reached $138.8 billion and the average balance passed $40,000 in the year to March 2026.^[4] As balances grow, small differences in fees, tax settings, and portfolio fit become more material.

A review is not an instruction to switch. Recent performance is a weak basis for choosing a provider or fund, and a higher fee is not automatically poor value if it pays for a service the member genuinely uses. The purpose is to confirm that the current arrangement still has a defensible reason behind it.

The useful interpretation of “set and forget” is therefore narrow: avoid trading KiwiSaver in response to headlines. It does not mean leaving contribution rates, PIR, fund risk, fees, and the withdrawal plan unexamined. Long-term discipline and regular review are complements, not opposites.