Why Your KiwiSaver Balance Dropped When Markets Were Up (NZ, 2026)

Your KiwiSaver can fall even on a day the news says markets rose. Six plain-English reasons — fees, PIE tax, bonds, the NZ dollar, unit-pricing lag and contribution timing.

TL;DR: Your KiwiSaver can fall on a day the news says markets rose. The usual culprits are fees and PIE tax coming out of your balance, bonds falling while shares climb, the NZ dollar strengthening against unhedged offshore holdings, and a unit price that lags the headlines by a day or more. Most of these are normal, not a sign anything is broken.

It is unsettling to open your KiwiSaver app, see a lower balance, and then read a headline saying share markets had a strong week. The two seem to contradict each other. They usually don't.

Your KiwiSaver isn't a single share that tracks one index. It's a fund holding a mix of assets, taxed and charged in particular ways, and valued on its own timetable. Once you understand the moving parts, a balance that dips while "the market" rises stops being a mystery. This article walks through six reasons it happens. It is general information, not a comment on your own fund.

Why did my KiwiSaver drop when the news said markets rose?

The short answer: "the market" in a headline is rarely the same thing as your fund.

When the news reports markets were up, it's usually pointing at one index — often the US S&P 500 or the local NZX 50 — over one trading day. Your KiwiSaver fund holds far more than that: NZ and overseas shares, bonds, sometimes cash and property, spread across many countries. On any given day, some of those parts can fall while the headline index rises.

On top of the mix itself, three mechanical things sit between the headline and your balance:

• Costs come out regardless. Fees and PIE tax are deducted from your balance whether markets are up or down ⁴⁶.
• Your balance is priced, not live. It updates from a unit price that's struck after the headlines, and can lag by a day or more ⁸.
• Currency moves count too. A stronger NZ dollar lowers the value of unhedged overseas assets in NZ-dollar terms, even if those assets rose in their home currency ⁹.

The table below summarises the six common reasons, then the rest of the article takes each in turn.

Sources: IRD; Sorted (FMA); provider PDS. Reasons most funds will see at some point; not every reason applies to every fund on every day.

Could fees and PIE tax explain the fall?

Often, yes — especially when the market move itself was small.

Fees. KiwiSaver providers charge an annual fund-management and administration fee, deducted from your balance throughout the year. Those charges come out regardless of how markets performed, so on a flat or slightly positive day, the fee deduction can be enough to nudge your balance down ⁶. You can compare fees across funds free on the FMA-backed Sorted Smart Investor tool ⁶. Fees are worth understanding because they're one of the few costs you have some control over — there's more in our guide on KiwiSaver fees versus performance.

PIE tax. KiwiSaver funds are Portfolio Investment Entities (PIEs). The income the fund earns is taxed at your Prescribed Investor Rate (PIR), and that tax is taken out of your balance ⁴. For individual NZ tax residents the PIR is 10.5%, 17.5% or 28% — capped at 28% rather than your personal marginal rate, which can be up to 39% ⁴. Because PIE tax is deducted from your account, it can lower your balance even in a flat or modestly positive market.

As at 13 May 2025, the PIR brackets were:

Thresholds effective 1 April 2025 ⁵. PIR (Prescribed Investor Rate) is the tax rate applied to your share of the fund's income.

Being on the wrong PIR matters here. If your PIR is set too high, you overpay tax straight out of your balance ⁵. It's worth checking yours is right — our guide to how PIE tax works in KiwiSaver walks through it.

Did bonds fall while shares rose in my fund?

This is one of the most common reasons a balanced or conservative balance dips on a "good" day for shares.

KiwiSaver funds hold a mix of assets, and bonds and shares don't always move together — sometimes they move in opposite directions ⁷. Bond prices tend to fall when interest rates rise. So a day where share markets climb but interest rates also tick up can leave the bond part of your fund down enough to drag the whole balance lower ⁷.

The more bonds your fund holds, the bigger this effect:

General pattern only; actual asset mixes vary by provider — check your fund's product disclosure statement (PDS).

This is also why a conservative fund can feel counter-intuitive. People often assume "conservative" means it only goes up gently. In reality it holds more bonds, so in a period when bonds are falling, a conservative fund can drop on a day the share-heavy funds rise. That's the mix doing exactly what it's designed to do, not a fault.

Is the NZ dollar the reason my balance dropped?

It can be — and this one catches a lot of people out.

Many KiwiSaver funds hold a large slice of international shares, and a good portion of that is often unhedged, meaning the currency exposure is left open rather than offset. When you hold unhedged overseas assets, their value in NZ dollars depends on the exchange rate. If the NZ dollar strengthens against currencies like the US dollar, those offshore holdings are worth fewer NZ dollars — even if the overseas market itself rose in its own currency ⁹.

So you can get a day where US shares climbed, the headline looked great, and yet your balance fell because the NZD rose enough to more than cancel out the gain once converted back ⁹.

The reverse is also true: a falling NZ dollar can lift the NZD value of unhedged offshore holdings and flatter your balance. Currency cuts both ways, and over short periods it can swamp the underlying market move. Whether a fund hedges its currency or leaves it open is a deliberate design choice with trade-offs — our guide on currency hedging in KiwiSaver explains how to find out what your fund does and why it matters.

Why does my balance lag the headlines (unit pricing)?

Because your balance isn't live — it's struck from a unit price, and that price is calculated after the fact.

Your KiwiSaver balance is your number of units multiplied by the fund's current unit price. That unit price comes from valuing everything the fund owns, which takes time and can lag live market headlines by a day or more ⁸. Funds also hold overseas assets priced in different time zones, so part of the valuation reflects markets that closed hours earlier ⁸.

The practical result: the figure you see in your app today may reflect where markets were yesterday, not the headline you just read this morning. A strong day on the news can show up in your balance a day or two later — and a weak day you'd already forgotten about can be the one that's actually being reflected now.

This timing gap is normal and applies to every unit-priced fund. It's also a good reason not to read too much into any single day's balance. For the bigger picture on how returns actually accumulate over time, our guide on KiwiSaver returns explained is a better lens than the daily figure.

Did a contribution timing or withdrawal cause it?

Sometimes the simplest explanation is that money moved, or the timing of money moving created an odd-looking number.

A few things to check on your own account:

• A withdrawal or transfer. A first-home withdrawal, a hardship withdrawal, or a transfer out will lower the balance directly — that's money leaving, not a market loss.
• A fund switch. If you (or your provider) switched funds, units were sold in one fund and bought in another. Depending on timing and any price differences, the balance can look different straight afterwards.
• Contribution timing. Contributions don't all land on the same day. Your pay contribution, your employer's, and the government contribution arrive at different times, so a statement taken between deposits can look lower than you expected — not because anything was lost, but because a deposit hadn't arrived yet.

As context on the contributions themselves: as at 13 May 2025, the minimum KiwiSaver contribution rate was 3% of gross pay for both employee and employer ³, and the government contribution (member tax credit) added 50 cents for every $1 you contributed, up to a maximum of $521.43 a year — for which you needed to contribute at least $1,042.86 of your own money between 1 July and 30 June ¹². If you're a low earner or self-employed, a missing government contribution can make a year-on-year comparison look worse than the market alone would suggest.

If your balance dropped right after a withdrawal or switch, that's usually the whole story — not the market at all.

When is a falling balance a real problem?

Most of the reasons above are normal mechanics, not warning signs. A balance that dips because of fees, tax, a bond move, currency or unit-pricing lag is your fund working as designed. The number on screen is also a paper figure until you sell — you still own the same units.

That said, a few situations are worth a closer look, and none of them are about a single down day:

• You're on the wrong PIR. An incorrect PIR can quietly overcharge tax out of your balance year after year ⁵. This is worth fixing regardless of markets.
• Your fund doesn't match your timeframe. If you'll need the money soon — a first home or retirement within a few years — a fund that can swing around may not suit, while someone with decades to go may be comfortable with more movement. The right fund depends on your situation, not on this week's headline.
• You're tempted to switch because of a fall. Reacting to a short-term drop by moving to a lower-risk fund can lock in a paper loss. The time to choose a fund is calmly, as part of a plan.

If you're unsure whether your balance has dropped for a normal reason or a fixable one, that's exactly the kind of thing a review can sort out. The point isn't to chase the highest number — it's to confirm your fund, fees and PIR fit how long until you'll spend the money.

Frequently asked questions

Why did my KiwiSaver go down when the share market went up? Usually because your fund isn't the same as the index in the headline. It holds a mix of shares, bonds, cash and overseas assets, with fees and PIE tax coming out of the balance ⁴⁶. On a given day, bonds can fall while shares rise ⁷, a stronger NZ dollar can lower unhedged offshore holdings ⁹, and your balance reflects a unit price that lags the headlines by a day or more ⁸. Any of these can pull the number down on an up day for shares.

Do fees and tax really come out even when the market is flat? Yes. Annual fund and admin fees are deducted from your balance regardless of performance ⁶, and PIE tax on the fund's income is deducted at your PIR (10.5%, 17.5% or 28%) ⁴. When the market barely moved, those deductions can be enough to show a small fall.

Can a stronger NZ dollar lower my KiwiSaver balance? Yes, if your fund holds unhedged international shares. When the NZ dollar strengthens against currencies like the US dollar, those overseas holdings are worth fewer NZ dollars — so your balance can fall even though the overseas market rose in its own currency ⁹. A falling NZ dollar works the other way.

Why does my balance seem to lag the news by a day? Your balance is your units multiplied by the fund's unit price, and that price is struck from valuations that can lag live headlines by a day or more, including overseas holdings priced in other time zones ⁸. So today's figure may reflect yesterday's markets.

Should I switch funds because my balance dropped? A short-term fall, on its own, is rarely a good reason to switch — selling after a drop can lock in a paper loss. It's more useful to check that your fund matches your timeframe and that your PIR is correct ⁵. If you're unsure, getting personalised advice before acting is sensible.

This article is general information only and is not personalised financial advice. It does not take into account your particular financial situation, goals or needs. Before acting, consider whether it's right for you and seek advice tailored to your circumstances. Returns are not guaranteed. The value of investments can go down as well as up and you may get back less than you invested. Past performance is not a reliable indicator of future performance. KiwiSaver is a long-term savings scheme. Government contributions, contribution rates, withdrawal rules and tax (PIR) settings are set by the Government and can change. Figures are correct as at 13 May 2025. Check current rules at ird.govt.nz, kiwisaver.govt.nz and sorted.org.nz, and the relevant scheme's Product Disclosure Statement. Craig Smith Business Services Ltd (FSP712931), trading as Smiths Financial, holds a Class 2 licence issued by the Financial Markets Authority and is a member of the Financial Dispute Resolution Service (FDRS). Written by Henry Smith, Financial Adviser; reviewed by Craig Smith, Principal Adviser. Last reviewed 13 May 2025.