Key takeaways
- Low cost and broad diversification are the main appeals of index ETFs.
- Tracking difference tells you more than the headline expense ratio.
- Consider currency conversion and your broker's ETF fees, not only the fund's costs.
An exchange-traded fund is a basket of assets that trades on an exchange like a single share. One purchase can give you exposure to hundreds of companies, which is why ETFs are a common starting point for long-term investors.
What you pay
| Cost | Where it appears | Typical impact |
|---|---|---|
| Expense ratio (TER) | Deducted inside the fund each year | Small but compounding |
| Tracking difference | Gap between fund and index returns | Shows real cost of the fund |
| Bid-ask spread | When you buy or sell | Matters for thinly traded funds |
| Broker commission | On each purchase | Matters for small, frequent buys |
| Currency conversion | If the fund trades in a foreign currency | Often the biggest hidden cost |
A simple comparison checklist
- Index and exposure. Confirm what the fund tracks: region, size, sectors.
- Replication method. Physical funds hold the assets; synthetic funds use swaps. Both exist; understand which you hold.
- Fund size and age. Very small funds can close, which forces a sale.
- Distribution policy. Accumulating funds reinvest dividends; distributing funds pay them out.
- Domicile and tax. Where the fund is registered affects withholding taxes and your reporting.Tip: Ask a local tax professional; rules vary.
Broker matters tooCheck whether your broker offers commission-free ETF programmes, what happens to uninvested cash, and whether recurring purchases are supported. Brokeli's ETF cost scenario applies the published fee schedule to a monthly contribution.