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ETFs explained

ETFs are the most common way people start investing in a whole market at once. Here's what one actually is, how index and active funds differ, and the quiet fee that decides how much of your return you keep.

What an ETF actually is

An ETF — exchange-traded fund — is a single holding that contains a basket of many investments. Buy one unit and you own a sliver of everything inside it. It trades on the share market just like a company's shares: you buy and sell it through a broker at a live price during market hours.

Most ETFs are built to track an index — a fixed list like "the 300 biggest companies on the ASX" or "the largest companies in the world." The fund just holds what the index holds, in the same proportions. That's why one trade can spread your money across hundreds or thousands of companies at once.

Index funds vs active funds

An index (passive) fund simply mirrors its index and makes no attempt to pick winners. Because there's little for a manager to do, the fee is usually very low. An active fund pays a manager to try to beat the market by choosing what to hold — which costs more, and the long-run evidence that most active funds actually win after fees is famously weak.

Neither is automatically right, but the fee gap is the reason low-cost index ETFs have become the default starting point for many investors. The widget below shows why that gap matters so much over time.

The fee that eats returns

A management fee (the MER) is charged on your whole balance every year — you never see a bill for it. A fraction of a percent looks like nothing. Drag the fee up and watch how much of the final result quietly disappears over the years.

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What to check before you buy

Two ETFs with similar-sounding names can behave very differently. Before buying, it's worth knowing exactly what an ETF holds (which index, which market, which currency), what it charges, and how it pays you. Most ETFs pay distributions — your share of the dividends and interest the basket earns — and Australian-share ETFs often pass on franking credits that can reduce your tax.

It's also worth a glance at the fund's size: very small or thinly traded funds can be harder to buy and sell at a fair price. None of this requires expertise — just a look at the fund's fact sheet before the first trade.

New to this? Start with Investing basics →　See fees and tax inside the Savings & investing tool →, and why small percentages snowball in Compound interest →.
How this page handles numbers. The fee-drag tool assumes a flat, illustrative 7% gross annual return so the effect of the fee is the only thing moving — it's not a forecast, and real returns vary year to year and can be negative. The fee, distribution, and franking points describe the general Australian rules as at 2025–26. This is general education, not financial advice; for decisions about your own money, talk to a licensed adviser.