The Long-Term Impact of ETF Fees on Your Portfolio

The invisible cost of investing

Total Expense Ratio (TER) is the annual fee charged by an ETF, expressed as a percentage of your invested assets. A 0.20% TER means you pay 2 EUR per year for every 1,000 EUR invested. It seems negligible — but compound interest works against you too.

How fees compound over time

Consider two identical MSCI World ETFs with different TERs:

• ETF A: 0.12% TER (e.g., iShares MSCI World)
• ETF B: 0.38% TER (e.g., Amundi MSCI World CW8)

With a 200 EUR/month investment over 30 years at 7% gross return:

• ETF A (0.12% TER): ~236,000 EUR
• ETF B (0.38% TER): ~227,000 EUR
• Difference: ~9,000 EUR

That 0.26% annual difference costs you nearly 9,000 EUR over 30 years. And this is with a modest 200 EUR/month contribution.

Beyond TER: total cost of ownership

TER is not the complete picture. The true cost of holding an ETF includes:

• TER (management fee)
• Tracking difference (how well the ETF follows its index)
• Bid-ask spread (transaction cost when buying/selling)
• Broker fees (platform charges, execution fees)

Tracking difference is often more important than TER. Some ETFs with higher TER actually deliver better net performance because of superior tracking, securities lending income, or tax optimization.

The cheapest ETFs by category

Here are the lowest-cost options for popular categories:

• MSCI World: Invesco MSCI World (0.19% TER) or iShares Core MSCI World (0.20% TER)
• S&P 500: Invesco S&P 500 (0.05% TER) or iShares Core S&P 500 (0.07% TER)
• Europe: BNP Paribas Easy STOXX 600 (0.20% TER)
• Emerging Markets: Amundi MSCI Emerging Markets (0.20% TER)
• Bonds: Xtrackers Eurozone Government Bond (0.15% TER)

When higher fees are justified

Higher TER can be worth paying in specific situations:

• PEA eligibility (Amundi CW8 at 0.38% is the only option for World exposure on PEA)
• Niche exposure (thematic ETFs naturally cost more due to smaller fund sizes)
• Physical replication preference (sometimes costs slightly more than synthetic)

How to minimize your total costs

• Choose a broker with free ETF savings plans
• Compare tracking difference, not just TER
• Use the Right ETF screener to filter by cost
• Avoid frequent trading (buy and hold minimizes bid-ask costs)
• Consider tax-advantaged wrappers (PEA, ISA) to reduce tax drag

Our advice

For core portfolio holdings (World, S&P 500, Europe), always choose the lowest-cost option unless you have a specific reason (like PEA eligibility) to pay more. For satellite positions (thematic, niche), accept slightly higher TERs but aim for ETFs under 0.50%. And always check tracking difference alongside TER.