Index Fee Impact Calculator

What this calculator is for

Compare how different annual fund fees can affect long-term results when the assumed market return stays the same.

This calculator is designed to make the cost of investing easier to see over time. The goal is not to predict the future with precision, but to isolate one important variable: fees. Even a small difference in annual cost can have a meaningful effect when compounding continues for years or decades.

Portfolio paths with the same return assumption

Line chart compares scenario A and B year by year when only fee levels differ.

Scenario A: 0.07% | Scenario B: 1.5%

Year-by-year comparison

Why this calculator uses the same return assumption

This tool keeps the assumed annual return the same across both scenarios on purpose. That makes it easier to see the effect of fees without mixing in differences in market performance.

You can use a simple long-term assumption such as 7% per year, or adjust the return to test other scenarios. The result is not a forecast. It is a way to compare how different fee levels may shape outcomes over time.

If you want to explore historical market performance instead, use the Rendite-Simulator. This calculator focuses on fee impact. The Rendite-Simulator focuses on how an index or ETF performed over a selected period.

Why fees matter

Investment fees often look small when shown as an annual percentage. But in long-term investing, a small annual cost can reduce the amount that stays invested and compounding for you.

That is why costs matter so much. The impact is not only the fee itself. It is also the future growth that money no longer has a chance to earn. Over long periods, the gap between a low-cost and higher-cost approach can become much larger than many investors expect.

How to use this calculator

Use the same starting amount, monthly contribution, and time horizon for both scenarios. Then compare two different fee levels.

A simple way to begin is to test a low-cost and higher-cost example with the same return assumption, such as 0.07% versus 0.60% over 20 or 30 years.

You can also use preset examples based on real index or ETF fee levels. In this tool, presets are used to populate fee inputs only. They do not import historical returns. That is intentional: the aim is to keep the comparison focused on fees.

What this tool includes

This calculator focuses mainly on ongoing annual fund fees.

It does not try to capture every real-world variable. Taxes, spreads, foreign exchange costs, tracking differences, and changes in future returns may also affect results. That means the output should be read as an educational comparison, not as a precise estimate of what any product will deliver.

Want to compare historical performance paths?

This tool is best for understanding how fees affect long-term outcomes when the return assumption stays the same.

If you want to test how a specific index or ETF performed over time, use the Rendite-Simulator instead. That tool is better for exploring historical return paths. This one is better for isolating the effect of costs.

Looking for historical performance? Use the Rendite-Simulator.

Disclaimer

This content is for informational purposes only and does not constitute investment advice. Prices, fees, and product features may change — check the provider’s official documents or provider homepage before making decisions.