Key points (as at Q2 2026)
- An index fund tracks a market index passively, with no stock picking; this generally keeps fees low.
- Most ASX ETFs are index funds, but not all index funds are ETFs (some are unlisted managed funds).
- ETFs trade intraday on the ASX; unlisted index funds price once a day and often have minimums.
- The MER is the single biggest long-term, controllable factor. General information only, not financial advice.
Last updated: Q2 2026. Figures are computed from ETFLens data as at Q2 2026, sourced from each issuer's published disclosure documents and reviewed quarterly.
For many Australian investors, the words "index fund" and "ETF" get used as if they mean the same thing. They overlap heavily, but they are not identical, and the difference matters when you decide how to buy one. This guide on index funds Australia explains what an index fund is, what an ETF is, how the two compare, and which index ETFs are among the most widely held on the ASX.
This article is general information only and not personal financial advice. ETFLens does not hold an Australian Financial Services Licence (AFSL).
What is an index fund?
An index fund is a fund that aims to track a market index rather than beat it. An index is just a defined list of securities, such as the S&P/ASX 200 (the 200 largest ASX-listed companies) or the MSCI World (large and mid-cap companies across developed markets). Instead of a manager picking stocks, an index fund holds the constituents of the index in roughly their index weights. This is called passive investing: there is no stock selection and no attempt to time the market.
Because there is no research team picking stocks, index funds generally charge much lower fees than actively managed funds. Over decades, that fee gap compounds, which is the main reason passive investing in Australia has grown so quickly.
What is an ETF?
An ETF, or Exchange-Traded Fund, is a fund that trades on the ASX like an ordinary share. You buy and sell units through any broker during market hours, at a live price. Most ASX ETFs are index funds (they track an index passively), but the term ETF describes the structure (listed and exchange-traded), not the strategy. There are also a small number of actively managed ETFs, and there are index funds that are not ETFs at all.
Index funds vs ETFs in Australia: the key differences
The clearest way to see the difference is to compare an ETF with an unlisted index managed fund that tracks the same index.
| Feature | ETF (listed) | Unlisted index fund |
|---|---|---|
| How you trade | On the ASX via a broker | Direct with the manager or a platform |
| Pricing | Live, intraday | Once per day |
| Minimum investment | One unit (plus brokerage) | Often $1,000 or more |
| Trading cost | Brokerage per trade | Often no brokerage |
| Access | Any ASX broker | Manager or platform account |
For regular, automated contributions, some investors prefer an unlisted fund because there is no brokerage on each top-up. For intraday trading, transparency and access through a standard broker, many prefer an ETF. Neither is universally better; they suit different habits.
The most widely held index ETFs on the ASX
A handful of broad index ETFs make up a large share of Australian ETF money. These are commonly used building blocks, listed here for information only and not as a recommendation:
- VAS tracks the S&P/ASX 300 (Australian shares), charging 0.07% p.a..
- VGS tracks developed global shares ex-Australia, charging 0.18% p.a..
- A200 tracks the Solactive Australia 200 Index (a near-identical 200-stock Australian index), charging 0.04% p.a., one of the lowest fees on the ASX.
- DHHF and VDHG are all-in-one diversified funds, charging 0.19% p.a. and 0.27% p.a. respectively.
VAS and A200 both track the large end of the Australian market, so they overlap heavily; holding both adds little. You can confirm that with the overlap checker. For a fuller list, see our guide to investing in ETFs in Australia.
What to look for in an index fund or ETF
Once you have decided on passive exposure, a few factual points are worth comparing. None of these is advice:
- Management fee (MER). For two funds tracking the same index, the fee is the biggest controllable difference over the long run. Compare fees on the cheapest ASX ETF by MER list or the screener.
- Index tracked. Two funds with similar names can track different indices (for example the ASX 200 versus the ASX 300), which changes what you own.
- Fund size (AUM). Larger funds are generally more liquid, which can mean tighter spreads.
- Distribution frequency. Some funds distribute quarterly, others half-yearly, which can matter for cash-flow planning.
You can filter and sort every ASX index ETF by these factors on the ETFLens screener.
Index funds vs actively managed funds
The other half of the index fund story is what they are an alternative to: actively managed funds, where a manager picks stocks and tries to beat the index. The trade-off is fees. An active manager charges for that research, so active funds typically cost several times more than an index fund tracking the same market. Over decades, a higher fee compounds into a meaningful drag that an active manager has to overcome before an investor is ahead. Studies have repeatedly found that many actively managed funds do not consistently beat their benchmark after fees, which is a large part of why low-cost index investing in Australia has grown so quickly. This is a general observation, not a prediction about any specific fund, and past performance is not a reliable indicator of future returns.
This article is general information only and not personal financial advice. ETFLens does not hold an Australian Financial Services Licence (AFSL). Consider your own objectives, financial situation and needs, or speak with a licensed financial adviser before making investment decisions. Past performance is not a reliable indicator of future returns.