ETF fees: TER and hidden costs

ETFs are cheap – but not free. Know these costs.

1. TER – the ongoing fund fee

The Total Expense Ratio is the key figure: the ETF’s yearly management cost in percent. It is deducted automatically from the fund – no separate bill.

Typical values:

Every ETF page shows the TER in the key facts.

2. Tracking difference – the real cost

The TER is only the expected fee. The tracking difference shows how far the actual ETF return deviates from the index – the most honest cost measure, though harder to find.

3. Trading costs

Why small percentages grow huge

Over long horizons, compounding magnifies costs too. For 200 €/month over 30 years at 7 %, the difference between a 0.20 % and a 0.70 % TER adds up to several thousand euros. Try it in the savings plan calculator.

Worked example

What 0.1 % more TER costs

€10,000 one-off, 30 years, 6 %/year before costs. Only the TER varies.

TERValue after 30yCosts you
0.10 %55831 €
0.20 %54271 €−1560 €
0.30 %52753 €−3078 €
0.50 %49840 €−5992 €
0.70 %47082 €−8750 €

"Costs you" = shortfall vs the cheapest row (0.10 %). Run your own numbers in the savings-plan calculator.

Bottom line

Prioritise broad diversification first, then low cost. Between two equivalent ETFs, the fee measurably matters over decades.


This article is for information only and is not investment advice.