How a 0.75% Expense Ratio Quietly Eats a Third of Your Returns

You open your brokerage app, check the fund you’ve been holding for years, and the expense ratio reads 0.75%. That’s less than one percent. It barely registers next to the daily swings in your account value. So you scroll past it.

That instinct is understandable and also wrong, in a way that costs real money over time.

A 0.75% fee doesn’t take 0.75% of your final balance. It takes something much bigger, because it’s charged every single year on a growing pile of money, and it compounds against you the same way your returns compound for you. The fee you barely notice in year one becomes a serious drag by year thirty.

Why a Small Annual Number Becomes a Big Lifetime Number

Expense ratios are quoted as an annual percentage of assets under management. A 0.75% expense ratio means the fund deducts 0.75% of your holdings’ value each year, usually pulled out gradually and baked into the fund’s daily price rather than shown as a separate withdrawal.

That framing makes it feel small. Compare it to a 6% or 7% expected annual return and it looks like a rounding error.

But here’s the mechanism that matters: the fee doesn’t just eat 0.75% of this year’s return. It eats 0.75% of your entire balance, every year, including the growth from all the prior years. Money that would have compounded on your behalf instead gets siphoned off before it has a chance to grow. Over a few years this is trivial. Over a few decades it isn’t.

The Worked Example

Let’s set up a clean illustration. All numbers below are assumptions I’m choosing for clarity, not predictions of what markets will actually do.

Assumptions:

• Starting investment: $10,000, no additional contributions
• Gross annual return (before fees): 7%
• Time horizon: 30 years
• Two scenarios: a fund charging 0.05% (typical of a low-cost broad index fund) and a fund charging 0.75% (typical of an actively managed fund)
• Fees are deducted continuously from assets under management, so the net return is simply gross return minus expense ratio

Net return for the cheap fund: 7% − 0.05% = 6.95% Net return for the pricier fund: 7% − 0.75% = 6.25%

Using the standard compound growth formula, Future Value = Present Value × (1 + rate)^years:

Look at the gap between the two funds: $71,900 versus $61,700. That’s a difference of roughly $10,200, or about 14% of the low-cost fund’s final balance, purely from a 0.70 percentage point difference in annual fees.

Now here’s the number in the headline. Compare the higher-cost fund’s total gain to what a fee-free version would have earned. The no-fee scenario grows your $10,000 into $76,100, a gain of $66,100. The 0.75% fund grows it into $61,700, a gain of $51,700. The fee consumed $14,400 of the gain you otherwise would have earned, which is about 22% of the fee-free gain. Run the same comparison against the low-cost fund’s gain of $61,900 and the higher-cost fund captured only about 83% of it. Depending on which baseline you pick, the fee erases somewhere between a fifth and a third of what you would have otherwise walked away with. The exact fraction moves with your assumptions, but the direction and the rough scale don’t.

Why the Gap Widens Over Time, Not Just Adds Up

If fees simply subtracted a flat dollar amount each year, the damage would grow in a straight line. It doesn’t work that way. Because the fee is a percentage of a growing balance, and because forgone growth itself would have compounded, the dollar impact accelerates the longer you hold.

At year 5, the gap between the two funds above is small, a few hundred dollars. At year 30 it’s over $10,000. The fee rate never changed. The balance it’s being taken from kept growing, and so did the compounding that never got to happen because that money left the account early.

What Actually Drives the Size of the Damage

Three things determine how much an expense ratio costs you in the end, and none of them is the fee percentage in isolation.

Time horizon. A 0.75% fee held for 5 years is a nuisance. Held for 35 years inside a retirement account, it’s a different animal entirely. Compounding needs time to do its work, and fees compound against you on the same schedule.

Balance size. A percentage fee on $10,000 is small in dollar terms. The same percentage on $500,000 is not. As your account grows, whether through contributions or growth, the annual fee grows with it.

The gap versus the alternative. The relevant comparison usually isn’t “fee versus no fee.” It’s fee versus the cheapest reasonable alternative that gives you similar exposure. A well-documented empirical finding across long-run mutual fund studies is that the majority of actively managed funds underperform their benchmark index over extended periods, after fees. That’s not a claim about any specific fund. It’s a pattern researchers have found repeatedly when comparing large samples of active funds to their benchmarks over long stretches, and it’s one reason the fee gap matters more than investors tend to assume.

What This Does Not Tell You

This analysis assumes a constant 7% return every single year, which never happens in real markets. Actual returns are lumpy, some years are negative, and the order in which gains and losses arrive (sequence risk) affects your real outcome in ways a smooth compounding formula can’t capture.

It also assumes no additional contributions. Most retirement savers add money over time, which changes the shape of the fee’s impact, though the direction of the effect (higher fees eat a growing share of a growing pool) still holds.

A higher expense ratio isn’t automatically a bad deal. Some strategies, asset classes, or account structures cost more to run and may offer something a low-cost index fund doesn’t, such as active risk management, access to a specific niche, or a mandate you specifically want. The question is whether what you’re getting is worth the gap, not whether the gap exists.

This example also ignores taxes, trading costs inside the fund, bid-ask spreads, and account-level fees, all of which layer on top of the expense ratio and vary by account type and jurisdiction.

Finally, 7% is a simplifying assumption, not a forecast. Real future returns for any asset class are unknown and could be higher or lower, which would change the dollar figures but not the underlying mechanic.

FAQ

Does a 0.75% expense ratio mean I’m charged 0.75% in cash each year?

No. It’s typically deducted gradually from the fund’s assets and reflected in its daily net asset value, so you don’t see a separate line-item withdrawal. The effect on your balance is the same either way.

Is 0.75% considered high or low for an expense ratio?

It depends on the fund type. Broad market index funds often charge well under 0.20%, sometimes under 0.05%. Actively managed funds, sector funds, and some specialty products commonly charge 0.50% to 1.5% or more. Whether 0.75% is reasonable depends on what the fund is doing and what alternatives exist for similar exposure.

Do expense ratios matter as much in a taxable account versus a retirement account?

The compounding mechanic works the same way in both. Retirement accounts often amplify the effect because the money tends to stay invested longer without withdrawals, giving fees more time to compound against the balance.

If I have a small account, should I even bother comparing expense ratios?

The percentage gap matters regardless of account size, because it compounds proportionally. A small account today may not stay small, especially if you’re contributing regularly, and the fee structure you’re in from the start shapes the long-run outcome.

Can a higher expense ratio ever be worth it?

It can be, if the fund is doing something a cheaper alternative genuinely can’t replicate for your situation. The point of this arithmetic isn’t that all fees are bad. It’s that the size of the gap is easy to underestimate, so it’s worth actually checking rather than assuming a fraction of a percent doesn’t matter.

What to Look at Next

If any of this made you want to check your own numbers, the place to start is your account statements or fund fact sheets, where the expense ratio is disclosed as a standard line item. You can run the same compounding math above with your own starting balance, time horizon, and assumed return to see how the gap looks for your specific situation. Comparing that figure against similar funds covering the same asset class or index is a reasonable next step before drawing any conclusions.

This article is general information, not financial advice. See our disclaimer.