KiwiSaver Unit Pricing Explained (NZ 2026): Why Your Balance Moves Daily

Your KiwiSaver balance changes every day because your money is held as units, and the unit price moves with markets. Here is how units, pricing and switching actually work.

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.

TL;DR: Your KiwiSaver money is held as units in a fund, not as dollars. Each unit has a price that is recalculated most business days as the fund's net asset value divided by the units on issue ⁶. When markets move, the unit price moves, so your balance changes daily even when you have added nothing.

Many people open their KiwiSaver statement, see the balance up one week and down the next, and wonder what they did wrong. Usually the answer is nothing. The balance moves because of how the fund is structured: your contributions are not sitting as cash, they are invested and held as units, and those units are re-priced regularly.

This guide explains what a unit is, how your contributions buy them, why the price changes every day, and what that means when you switch funds.

What is a unit price in KiwiSaver?

A KiwiSaver fund pools money from thousands of members and invests it in things like shares, bonds, property and cash. Rather than track each member's share in dollars, the fund divides itself into equal slices called units. Owning units is how you own a portion of the fund.

The unit price is simply the value of one of those slices on a given day. Your balance is the number of units you hold multiplied by the current unit price:

Balance = units held × unit price

So there are only ever two ways your balance can change. Either the number of units you hold changes (you contribute, the provider takes fees, or you withdraw), or the price of each unit changes (the value of the fund's investments moves). Most day-to-day movement is the second one.

This is the same mechanism used by managed funds generally. KiwiSaver schemes are Portfolio Investment Entities (PIEs), and a member's share of the fund — and the tax on it — is based on the number of units held ¹³.

How are your contributions converted into units?

When money lands in your KiwiSaver account, the provider does not hold it as dollars for long. It uses the cash to buy units at the unit price applying on the relevant day. The number of units you receive is the money divided by the price:

Units bought = contribution ÷ unit price

A worked example. Suppose $100 of your pay reaches a fund.

Same $100, three different outcomes — because the lower the price, the more units that $100 buys. This is the figure below.

Same $100 contribution buys more units when prices fall

``` $100 at unit price $2.00 | ################################## 50.0 units $100 at unit price $1.60 | ########################################## 62.5 units ```

Illustrative unit-pricing example. Returns are not guaranteed and the value of investments can go down as well as up.

This is worth sitting with, because it changes how a falling market feels. If you are still contributing through your pay, a lower unit price means each contribution buys more units. Whether that helps depends on what prices do afterwards, which no one can predict — but it is the reason a market dip is not automatically bad news for someone many years from withdrawing.

Why does your balance change every day?

Because the unit price is recalculated most business days, and it reflects the market value of everything the fund holds.

Shares listed in New Zealand, Australia, the US and elsewhere change price every trading day. Bond values move with interest rates. Currency rates shift. The fund's administrator adds all of this up, subtracts the fund's liabilities and fees, and divides by the units on issue to produce a fresh unit price ⁶. PIE income and tax are themselves calculated on each day that unit prices are struck ³.

So on a day you contribute nothing, your unit count stays the same, but the price attached to each unit has moved with markets. Multiply the two together and the balance is different. None of that reflects anything you did; it reflects what global markets did between one pricing point and the next.

A few practical notes:

• Pricing is usually daily, but not always instant. Funds holding hard-to-value assets (some property or unlisted investments) may price less often, and there can be a short lag while overseas markets and exchange rates are captured. Your statement reflects the last struck price, not a live ticker.
• More growth assets means more movement. A growth or aggressive fund holds more shares, so its unit price swings more than a conservative fund's. That is the trade-off for higher expected long-run returns, not a fault.

If the daily movement bothers you, the honest fix is usually to check your balance less often, not to change funds. For how the different profiles behave, see KiwiSaver fund types explained.

What is the difference between a unit price and your return?

People often treat the unit price as their return. It is not. The unit price is a level; your return is the change in that level over a period, applied to the units you hold, after fees and tax.

Two reasons the headline unit price and your actual return can diverge:

• Fees and tax are already inside the price. A fund's published unit price is generally struck after the fund's management fees and after PIE tax effects have been accounted for in the fund's net asset value ⁶. KiwiSaver earnings are taxed at your Prescribed Investor Rate (PIR) — 10.5%, 17.5% or 28%, based on your income over the last two income years ¹².
• Tax differs by asset. New Zealand shares and certain ASX-listed Australian shares are generally exempt from tax on capital gains, while most other offshore shares are taxed under the Foreign Investment Fund (FIF) rules at a deemed 5% of opening market value, calculated each pricing day ⁷. This is one reason two funds with similar gross investments can report different after-tax unit-price growth.

So the unit price quietly carries fees and tax. A higher unit price on its own does not mean a fund is "better" — a fund that has simply been running longer will tend to have a higher price. What matters is the percentage change over time, after fees and after tax. We unpack that in KiwiSaver returns after fees and tax.

What happens to your units when markets fall?

This is the part that causes the most worry, so it is worth being precise. In a market fall:

• The number of units you hold does not change. A market drop does not delete units.
• The price of each unit falls, so your balance falls on paper.
• Any contribution made while the price is down buys more units than the same dollars would have bought before.

A loss only becomes real money lost if you sell units at the lower price — by withdrawing, or by switching to another fund (more on that below). If you hold and keep contributing, you still own the same units, plus the extra ones each contribution bought while prices were low. Whether the price recovers, and when, is not guaranteed; markets can stay down for extended periods, and that is exactly why time horizon matters.

For someone close to needing the money — a first-home withdrawal soon, or retirement spending starting shortly — a fall is more serious, because there may not be time to wait for a recovery before units must be sold. For someone with decades to go, a fall is a different thing entirely. The unit mechanism is the same; the consequences depend on the person.

How is the unit price actually calculated?

The formula is straightforward; the work behind it is not.

Unit price = (total assets − liabilities) ÷ units on issue

The top half is the fund's net asset value (NAV): everything the fund owns at current market value, less what it owes (including fees payable and tax). The bottom half is the total number of units all members collectively hold. Divide one by the other and you get the price of a single unit ⁶.

The valuation and unit-pricing method each scheme uses is set out in its governing document (the trust deed or scheme rules), filed publicly on the Companies Office Disclose Register ⁶. Providers are also required under the Financial Markets Conduct Act 2013 to publish quarterly fund updates, which disclose the fund's unit price alongside fees, returns, the top 10 investments and the actual asset allocation ⁴. The Financial Markets Authority monitors schemes for compliance with these disclosure obligations ⁵.

If you want to see your fund's unit price and how it is struck, the quarterly fund update (on your provider's site or the Disclose Register) is the authoritative source.

Does it matter what day your contribution lands?

A little, but far less than people fear, and not in a way you can usefully game.

Each contribution buys units at that day's price. Land on a low-price day and you get more units; land on a high-price day and you get fewer. Over a working life you make hundreds of contributions across hundreds of different prices, which averages out the timing. This drip-feeding is sometimes called dollar-cost averaging, and it is one of the quiet advantages of KiwiSaver: you are buying in steadily rather than betting on a single entry point.

Trying to time contributions to "buy the dip" is rarely worth it. Your contributions are driven by your pay cycle and employer processing, you cannot reliably pick the low, and the difference one day makes to a lifetime balance is tiny. The thing that moves the needle over decades is your fund type, your fee level and how long you stay invested — not the calendar date a single pay run cleared.

How does unit pricing affect switching funds?

Switching is where unit pricing stops being abstract. When you switch funds or providers, the process is:

1. Your units in the old fund are sold at the old fund's unit price on the day the switch is processed.

2. The proceeds are used to buy units in the new fund at its unit price.

Two things follow from that.

Switching after a fall locks the fall in. If markets are down and you move to a more conservative fund, you sell your existing units at the reduced price — turning a paper drop into a realised one — and you give up the units that would have benefited if the original fund's price recovered. The drop is no longer on paper at that point.

There can be a pricing gap. Sell and buy may not happen at the same instant; depending on the scheme there can be a day or two between exiting one fund and the money landing in the next, during which it is not exposed to markets either way. The fund update and scheme documents set out how each provider handles this ⁴⁶.

None of this means switching is wrong — moving to a fund whose risk level better fits your timeframe can be exactly the right call. It means switching reacting to a single bad week, by contrast, can convert a temporary price dip into a permanent loss. If you are weighing a change, KiwiSaver returns explained covers how to judge a fund properly before you act.

Frequently asked questions

Why did my KiwiSaver balance drop when I did not touch it? Because your money is held as units, and the unit price is recalculated most business days based on the market value of the fund's investments ⁶. On a day you add nothing, your unit count is unchanged but the price per unit has moved with markets, so the balance moves too. No action of yours is involved.

Is a higher unit price better than a lower one? Not on its own. The unit price is a level, not a return. A fund that has been running longer will usually have a higher price simply because of time. What matters is the percentage change over a period, after fees and after tax — not the raw price.

Do I lose units when the market falls? No. A market fall lowers the price of each unit, but you keep the same number of units. A loss only becomes real if you sell units at the lower price by withdrawing or switching. If you hold, you still own the same units.

Does it matter which day my contribution is invested? Only slightly. Each contribution buys units at that day's price, so a low-price day buys more units. But across a working life of hundreds of contributions the timing averages out, and trying to pick the day is not worth it.

Where can I find my fund's unit price? In your provider's quarterly fund update, which must disclose the unit price along with fees, returns, top 10 investments and asset allocation under the Financial Markets Conduct Act 2013 ⁴. Scheme documents on the Companies Office Disclose Register set out exactly how the price is calculated ⁶.

Why does my reported return differ from the change in the unit price? Because the unit price already has fees and PIE tax built into it, and tax differs by asset — most offshore shares are taxed under the Foreign Investment Fund rules at a deemed rate each pricing day, while NZ and some Australian shares are treated differently ⁷. Your return also depends on your PIR (10.5%, 17.5% or 28%) ².

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. 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 23 August 2025. Check current rules at ird.govt.nz, kiwisaver.govt.nz and sorted.org.nz, and the relevant scheme's Product Disclosure Statement. 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. Smiths Financial is a trading name of Craig Smith Business Services Ltd (FSP712931), which holds a Class 2 financial advice provider licence issued by the Financial Markets Authority to provide financial advice on personal risk insurance, health insurance, general insurance, KiwiSaver and managed funds. Our advisers, Henry Smith (Financial Adviser) and Craig Smith (Principal Adviser), are bound by the Code of Professional Conduct for Financial Advice Services and the duty to give priority to clients' interests. Craig Smith Business Services Ltd is a member of the Financial Dispute Resolution Service (FDRS), a free and independent dispute resolution scheme. Our publicly available disclosure information is available free of charge on our website and on the FMA Financial Service Providers Register at fsp-register.companiesoffice.govt.nz. Written by Henry Smith, Financial Adviser at Smiths Financial (FSP712931); reviewed by Craig Smith, Principal Adviser. Last reviewed 23 August 2025.