What Is an Expense Ratio and Why Does It Matter?

An expense ratio is the annual fee a mutual fund or ETF charges to run itself, shown as a percentage of the money you have invested. A 0.20% expense ratio costs $20 a year per $10,000. The fund deducts it from its assets automatically, so you never receive a bill for it.

You are comparing two funds that hold almost the same stocks. One costs 0.05% a year and the other costs 0.85%. The difference looks tiny on the screen, and nobody sends you an invoice, so it is easy to ignore. It is also one of the few parts of investing you can see before you buy.

How does an expense ratio work?

The expense ratio is the fund's yearly operating cost divided by its average assets. According to Investor.gov, the SEC's investor education site, those operating expenses can include investment advisory fees, marketing and distribution expenses, brokerage fees, and custodial, transfer agency, legal and accounting fees. Funds pass these costs along to shareholders.

Because the cost comes out of the fund's assets, it lowers the fund's reported return every year. If a fund's holdings gain 7.00% in a year and its expense ratio is 0.50%, shareholders see roughly 6.50% before any other costs or taxes.

A quick way to see the cost in dollars:

Account value	0.05%	0.50%	1.00%
$10,000	$5 a year	$50 a year	$100 a year
$100,000	$50 a year	$500 a year	$1,000 a year

These figures are simple arithmetic on the balance, and they grow as the balance grows.

Why does a small fee make such a big difference?

Fees compound in the wrong direction: every dollar paid in fees is a dollar that no longer grows. Investor.gov shows the effect on a hypothetical $100,000 investment growing 4% a year for 20 years. With a 0.25% annual fee it ends near $208,000, with 0.50% near $198,000, and with 1.00% near $179,000.

That is a gap of about $29,000 between the lowest and highest fee, on the same assumed growth. The example is an illustration, not a forecast. Real returns vary, and they can be negative.

The SEC page puts the point plainly: a fund with high costs must perform better than a low-cost fund to generate the same returns for you. Fees are certain, while performance is not.

Where do you find a fund's expense ratio?

The expense ratio is public for every U.S. mutual fund and ETF, and you can find it in three places.

The fee table in the prospectus

Fees and expenses are identified in a standardized fee table near the front of a fund's prospectus, according to Investor.gov. The line to look for is "Total Annual Fund Operating Expenses." That is the expense ratio.

The fund's own web page

Most fund companies list the expense ratio at the top of the fund's page, often next to the ticker. If a page shows both a gross and a net figure, the net figure reflects any fee waiver the company has agreed to. Waivers can end, so note the expiration date.

Your brokerage's fund screener

Brokerages usually let you sort or filter funds by expense ratio. Use it to compare funds in the same category, and then confirm the number in the prospectus before you buy.

What is a good expense ratio?

There is no single cutoff, because what is reasonable depends on what the fund does. Broad index funds that simply track a market usually cost less than actively managed funds that pay analysts to pick investments. Specialty funds, such as those holding foreign small companies or niche sectors, often cost more because they are harder to run.

A fair test is to compare a fund with others that hold the same kind of investments. If two funds track the same index, the cheaper one gives you the same holdings for less. If a fund costs much more than its peers, ask what extra you get for the difference and whether it has delivered that extra over a long period. Our guide to how an index fund works explains why tracking funds tend to be cheaper to operate.

What other fees come on top of the expense ratio?

The expense ratio is not the whole cost of investing. Investor.gov lists other common fees, so check for each one before you buy.

Sales charges (loads). A fee paid when you buy or sell some mutual fund share classes.
12b-1 fees. Ongoing marketing and distribution fees, which are normally already included in the expense ratio.
Redemption, exchange, account and purchase fees. Charges tied to particular transactions or services.
Advisory or account fees. If you pay an adviser, that fee is separate from the fund's own expense ratio. See how to choose a financial advisor for the questions to ask.

Add the fund's expense ratio to any advisory fee to see your true yearly cost.

A short checklist before you buy a fund

Find "Total Annual Fund Operating Expenses" in the prospectus fee table.
Compare it with two or three funds that hold the same kind of assets.
Check for sales charges and redemption fees.
Note whether any fee waiver has an end date.
Multiply the percentage by your planned investment to see the yearly dollar cost.

A low fee does not make a fund suitable or protect you from losses. It only removes one cost you can control. Every investment carries risk, including the possible loss of the amount you invest.

Frequently asked questions

Is the expense ratio charged on top of my investment?

No. It is deducted from the fund's assets before the fund's price, or net asset value, is calculated. You see it as a slightly lower return rather than as a separate charge.

Do ETFs have expense ratios?

Yes. Mutual funds and ETFs both have operating expenses, and Investor.gov covers fees for both together. ETFs can also involve brokerage commissions or bid-ask spreads when you trade them, which are separate from the expense ratio.

Does a higher expense ratio mean better performance?

Not by itself. A higher-cost fund has to earn more just to match a lower-cost fund after fees, according to Investor.gov, and higher fees do not guarantee higher returns.

How often does the expense ratio change?

It can change from year to year as a fund's assets and costs change, and a company can raise or lower it. Check the most recent prospectus or fund page rather than relying on an old number.