Investing
Index Funds vs ETFs: What Is the Difference? (2026)
An index fund and an ETF can hold exactly the same investments. The difference is how you buy them. An ETF (exchange-traded fund) trades on a stock exchange during the day at a changing price, while a traditional index mutual fund is bought and sold from the fund company, usually once a day at the closing value. Many ETFs are index funds, but not all index funds are ETFs. The better choice depends on your broker, costs, minimums and tax rules.
"Index funds vs ETFs" confuses many beginners because the two overlap. An index fund describes what the fund does, which is to copy an index. An ETF describes how it is traded. This guide explains the difference, the practical trade-offs and how to decide. It is education, not advice.
The difference in one table
| Index mutual fund | Index ETF | |
|---|---|---|
| What it holds | The investments in an index | The investments in an index |
| How you buy | From the fund company or a platform | On a stock exchange through a broker, like a share |
| Price | Set once a day (net asset value) | Changes through the trading day |
| Minimum to start | Often a set minimum, and some have none | The price of one share, or less if your broker allows fractions |
| Automatic monthly investing | Often easy to set up | Depends on your broker |
| Trading costs | Usually none to buy, but check for fees | Broker commission may apply, plus a small gap between buy and sell prices |
| Tax treatment | Varies by country | Varies by country, and can differ from mutual funds |
For the basic definitions, see our glossary entries on index funds and ETFs.
What is the same
- Both can track the same index, so the underlying companies can be identical.
- Both spread your money across many holdings, which is diversification.
- Both charge a yearly fee shown as an expense ratio, and both can fall in value.
How to choose
- Check what your broker or platform offers. Some countries make ETFs easier, others make mutual funds easier.
- Compare total cost, not only the expense ratio: commission, buy-sell gaps, currency conversion and platform fees.
- Think about how you invest. A fixed monthly amount may suit a mutual fund or a broker that supports regular ETF purchases.
- Check the tax rules in your country, since they can differ between the two.
- Compare the actual funds, including how closely each follows its index.
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Register for the masterclass nowCommon mistakes
- Assuming every ETF is an index fund. Some ETFs are actively managed.
- Comparing only fees and ignoring trading and currency costs.
- Holding several funds that track nearly the same index.
- Trading an ETF too often because it can be traded all day.
Next, read how to choose an ETF, index funds vs active funds and how to invest in stocks for beginners.
Example: two ways to invest the same monthly amount
The figures here are made up to show the process, not to suggest any product.
| Via an index mutual fund | Via an index ETF | |
|---|---|---|
| Set-up | Choose the fund and set a monthly amount on the platform | Choose the ETF at your broker and set a recurring purchase, or buy manually each month |
| What you pay each month | Usually no trading fee, but check platform fees | A commission if your broker charges one, plus a small buy-sell gap |
| What you own | Units priced once a day | Shares priced throughout the day |
| Hassle | Low if automatic investing is supported | Low if recurring purchases are supported, higher if you buy by hand |
If the underlying index and the fund fees are the same, long-run results will be close. The practical differences are cost, convenience and tax in your country.
Questions beginners ask
- Do ETFs cost more to trade? They can, because of commissions and the gap between buy and sell prices, which matters most if you trade often or invest small amounts.
- Can I buy part of an ETF share? Some brokers offer fractional shares. Check yours.
- Which do most beginners pick? It depends on the country and the platform. Choose based on total cost and ease, not on the label.
- Can I hold both? Yes, but avoid two funds that track nearly the same index, because that adds cost without adding diversification.
Education only. This article is general information, not financial, tax or legal advice, and it does not recommend any fund. Investing involves risk, including the loss of your money. Rules differ by country.
Frequently asked questions
What is the difference between an index fund and an ETF?
An index fund describes what a fund does, which is to copy an index. An ETF describes how it trades, on a stock exchange during the day. Many ETFs are index funds.
Are ETFs better than index funds?
Neither is better for everyone. The right choice depends on your broker, total costs, minimums, how you invest and your country's tax rules.
Can an index fund and an ETF hold the same investments?
Yes. Both can track the same index and hold the same companies.
Which is cheaper?
Compare total cost, including the expense ratio, broker commissions, the gap between buy and sell prices and currency conversion.
Is it easier to invest monthly in an index fund?
Often yes, because many platforms support regular investments in mutual funds. Some brokers also support regular ETF purchases.
Are all ETFs index funds?
No. Some ETFs are actively managed or track unusual strategies.
Do I pay different tax on ETFs and index funds?
It can differ by country. Check your tax authority or a licensed adviser.
Is this financial advice?
No. It is education only. Investing involves risk.