Expense Ratio

What is an expense ratio?

An expense ratio is the annual fee a fund, like an index fund, ETF, or mutual fund, charges to manage your money. It's shown as a percentage of your investment. If you have $1,000 in a fund with a 1% expense ratio, you pay about $10 a year.

You'll never see this fee leave your account as a separate charge. It's taken out of the fund's assets, which quietly lowers your returns. Think of it as a subscription fee you never get a bill for.

Why small percentages matter

Fees come out every year, and the money lost to fees also loses all the growth it would have earned. Here are two hypothetical examples, assuming the investments earn 7% a year before fees:

A one-time $5,000 investment held for 30 years

• Fund A, 1.2% expense ratio: grows to about $27,100
• Fund B, 0.1% expense ratio: grows to about $37,000

That fee difference costs about $9,900.

$200 a month for 40 years

• 0.1% expense ratio: about $510,000
• 1% expense ratio: about $398,000

That's a gap of more than $110,000, just from fees. Returns aren't guaranteed, but fees are. See how fees fit into growth over time with the compound interest calculator.

What you're paying for

• Fund management: deciding which stocks or bonds to buy and sell
• Administration: record keeping, statements, and customer service
• Marketing and distribution: some funds include these costs too
• Legal and audit fees: keeping the fund compliant

Index funds vs. actively managed funds

Index funds don't try to beat the market. They just track it, like a fund that follows the S&P 500. Less research means lower costs, so their expense ratios are usually very low. (See index.)

Actively managed funds, including many mutual funds, pay teams of analysts to try to beat the market. That extra work costs more, so their expense ratios are usually higher. They also have to beat the market by more than their fees just to come out ahead.

When is an expense ratio too high?

Compare a fund with similar funds, not with every fund. If two funds track the same index, the one with the lower expense ratio usually leaves you with more money. For an actively managed fund, ask whether its long-term results after fees justify the cost. Just like you wouldn't pay $50 for a basic white T-shirt when an identical one costs $10, don't overpay for the same investment exposure.

How to find a fund's expense ratio

• Fact sheet: Every fund publishes one, usually on its website.
• Your brokerage: Most platforms list the expense ratio on the fund's page and let you compare funds side by side.
• Prospectus: The official document that lists all of the fund's fees.

Tips

• Start with low-cost index funds. They're typically the cheapest and simplest way to invest.
• Don't chase last year's winner. A fund with a great year and high fees can disappoint over the long run.
• Check your 401(k) options. Plans often offer several funds with very different fees. (See 401(k).)
• Remember that fees grow with your balance. A small percentage doesn't matter much on $100, but it adds up fast as your account grows.

The bottom line

Expense ratios aren't evil. Fund companies provide real services, and good management costs money. The key is knowing what you're paying and making sure it's worth it. In investing, it's not just what you make. It's what you keep.