What is an expense ratio?

An expense ratio is the percentage of your invested money a fund charges each year to cover its costs. A 0.03% ratio means $3 per $10,000 invested annually; a 1.00% ratio means $100 per $10,000 — taken automatically, whether the fund goes up or down.

Is a 1% fee really that bad?

One percent sounds tiny, but it is charged every year on your whole balance, so it compounds against you. Over several decades the difference between a 0.03% and a 1% fund can add up to a large share of your final balance — often tens of percent.

Where do I find a fund's expense ratio?

It is listed on the fund's official fact sheet or prospectus and on most brokerage fund pages, usually shown as a percentage such as 0.04% or 0.85%.

Does this include trading commissions or taxes?

No. It compares expense ratios only. Real costs can also include trading commissions, bid-ask spreads, sales loads, and taxes, so treat the result as the fee-drag floor, not the full cost.

ETF Fee Drag Calculator

Compare two funds' expense ratios and see how much a higher annual fee quietly costs you over decades — the money that leaves your account instead of compounding.

Why a small fee is a big deal

A fund’s expense ratio is the slice of your money it takes every year to run itself. It is quoted as a percentage — 0.03%, 0.50%, 1.00% — and it is deducted automatically from the fund’s returns. You never see a bill, which is exactly why fees are so easy to ignore. The calculator above makes the invisible visible: give it two expense ratios and it shows how far apart the same investment ends up.

The reason the gap grows so large is the same force that makes investing work in the first place. Every dollar a fund skims in fees is a dollar that is no longer in your account earning returns — and those returns would have earned returns of their own. In other words, fees do not just cost you the fee; they cost you all the future compounding that money would have produced. If you want to see the upside of that force working for you, try the compound interest calculator and then come back here to see the same force working against you.

How the calculator works

We take a single gross return — the market return before any fund fees — and subtract each fund’s expense ratio to get its net return. Then we grow the same starting amount and the same monthly contribution at each net rate over your chosen horizon. The shaded band in the chart is the running difference between the two: the money the higher-fee fund quietly hands over that the lower-fee fund keeps.

A worked example

Suppose you invest $10,000, add $500 a month, and the market returns 7% a year for 30 years. A low-cost index fund charging 0.03% nets about 6.97%. A pricier fund charging 1.00% nets about 6.00%. That single percentage point does not feel like much year to year, yet after 30 years the low-cost fund can leave you with a materially larger balance — frequently a six-figure difference on a portfolio this size. Nothing about the two funds differs except the fee.

Index funds, active funds, and the fee question

Low-cost index funds and ETFs often charge a few hundredths of a percent, while many actively managed funds charge close to 1% or more. A higher fee can be worth it only if the fund reliably beats the market by more than its extra cost after taxes — something that is historically rare over long periods. The point of this tool is not to say fees are always wrong, but to let you weigh the certain cost of a fee against the uncertain promise of higher returns.

What this calculator does not capture

It compares expense ratios and nothing else. Real-world costs can also include trading commissions, bid-ask spreads, front- or back-end sales loads, and taxes on distributions. It also assumes a single, steady gross return; markets are volatile in practice. Use the result to understand the scale of fee drag and to compare specific funds — not as a precise prediction. For decisions about your own portfolio, consult a qualified professional.