Quick answer
The expense ratio is a fund's total yearly operating expenses, as a percentage of average net assets, taken from the fund rather than billed to you. Some funds also charge one-time shareholder fees such as sales loads or redemption fees. Small yearly percentages compound into large dollar amounts [1] [2].
Key points
- Fund costs come in two groups: yearly operating expenses (the expense ratio) and one-time shareholder fees.
- The expense ratio is taken from fund assets, so you never see a bill — it shows up as lower returns.
- Common shareholder fees include sales loads, redemption, exchange, account and purchase fees.
- A 1% yearly fee can cost thousands of dollars more than a 0.05% fee over 30 years on the same investment.
- Every fund's prospectus shows its fees in a standard fee table, so you can compare like with like.
#What is an expense ratio?
The expense ratio is the cost of running a fund for a year, stated as a percentage of the fund's average net assets [1]. The SEC's guide describes it as the line of the fee table that shows the total of a fund's annual operating expenses, and notes that looking at it "can help investors make comparisons among various mutual funds and ETFs" [3]. Our glossary has a short definition of expense ratio.
You do not pay it with a separate bill. The fund deducts it from its assets, so it quietly lowers the return you receive. A 0.50% expense ratio means about $5 a year for every $1,000 invested. Fees are often quoted in basis points: 1 basis point is 0.01%, so 0.50% is 50 basis points.
#What goes into a fund's yearly operating expenses?
The SEC groups annual operating expenses as "regular and recurring fund-wide costs" paid from fund assets [1]. They include:
- Management fees — paid to the investment adviser who manages the portfolio [1].
- 12b-1 (distribution and service) fees — paid out of fund assets to cover marketing, selling and sometimes shareholder services. They typically apply to mutual funds but not ETFs [4]. FINRA says these fees are capped at 1 percent of your assets in the fund [5].
- Other expenses — the remaining costs of operating the fund, shown as their own line in the fee table.
#Which one-time fees can funds charge?
Shareholder fees are charged directly to you when you do something, such as buy or sell [1]. They are separate from the expense ratio, and they are listed in the first part of the fund's fee table. The table below summarizes the main ones.
| Fee | When it is charged | Who receives it | Notes |
|---|---|---|---|
| Front-end sales load | When you buy | Usually the selling firm | FINRA: often between 2% and 5% of the purchase; may drop at breakpoints |
| Back-end / deferred sales load | When you sell | Usually the selling firm | Can shrink to zero the longer you hold |
| Redemption fee | When you sell | The fund | SEC limits redemption fees to 2% |
| Exchange fee | When you switch to another fund in the same family | Set by the fund | Not all funds charge it |
| Account fee | Periodically, sometimes only below a balance threshold | Set by the fund | Varies by fund |
| Purchase fee | When you buy | The fund | Different from a front-end load |
| Expense ratio | Every year, from fund assets | Adviser and service providers | Includes management and 12b-1 fees |
| Spread and commission (ETFs) | Each time you trade | The trader on the other side; your broker | Not in the fee table |
Two numbers in that table come from separate sources: FINRA describes front-end loads that "can range between 2 percent and 5 percent" [5], and the SEC's guide states that the SEC limits redemption fees to 2% [3]. A fund labeled no-load charges no sales load, but the SEC stresses that "no-load does not mean no fees" [6]. For how loads interact with share classes, see what a mutual fund is.
#How much do fees cost over time?
This is where small numbers turn into big ones. The SEC's bulletin on fees explains that fees and expenses reduce the amount of money in your portfolio earning a return [2]. Every dollar paid in fees is a dollar that does not grow — and does not earn returns on its returns. That is compound interest working against you.
The SEC gives its own illustration: $100,000 growing at 4% a year for 20 years ends at roughly $208,000 with a 0.25% yearly fee, $198,000 with 0.50% and $179,000 with 1.00% [2]. Our example below uses a smaller starting amount and a longer period.
Worked example
$10,000 for 30 years at three fee levels
You invest $10,000 once. The fund's holdings earn a hypothetical 6% a year before costs. Each year the fund deducts its expense ratio: ending value = $10,000 × (1.06 × (1 − fee)) ^ years. No further deposits, no taxes.
- No costs at all (benchmark): $10,000 × 1.06^30
- $57,435
- Expense ratio 0.05%
- $56,580 (costs $855)
- Expense ratio 0.50%
- $49,416 (costs $8,019)
- Expense ratio 1.00%
- $42,485 (costs $14,950)
- Gap between 0.05% and 1.00%
- $14,095
Same investment, same market, same 30 years: the 1% fund ends about $14,095 behind the 0.05% fund.
Hypothetical return for illustration only; real returns vary and can be negative. Calculated in Python. Try your own numbers with the fee impact calculator.
Value of $10,000 at a 6% gross return, by expense ratio
- 0.05% expense ratio
- 0.50% expense ratio
- 1.00% expense ratio
The same method reproduces the SEC guide's own example: $10,000 earning 5% a year before expenses for 20 years grows to roughly $19,612 with 1.5% annual expenses, but to $24,002 with 0.5% [3]. That is a gap of about $4,390 from a one-percentage-point difference in cost.
#How do you find and compare a fund's fees?
Checking a fund's costs in five minutes
Open the summary prospectus
Find the section titled "Fees and Expenses of the Fund". See how to read a fund prospectus.
Read the shareholder fees
Note any front-end or deferred load, redemption fee or account fee.
Find total annual fund operating expenses
This is the expense ratio. Check whether a fee waiver lowers it only temporarily.
Look at the dollar example
The fee table shows estimated costs on a hypothetical $10,000 over 1, 3, 5 and 10 years.
Compare like with like
FINRA's Fund Analyzer lets you compare expenses among funds.
FINRA notes that one easy way to compare funds' fees is to look at the total annual fund operating expenses, "otherwise known as the fund's expense ratio" [5]. For ETFs, remember the costs outside the fee table: brokerage commissions and the effect of premiums and discounts to NAV [1].
Common beginner mistakes
Looking only at past returns
Returns change; fees are known in advance and are charged every year whatever the fund does. A lower cost is one of the few things you can check before investing.
Assuming no-load means free
A no-load fund can still charge redemption, exchange or account fees, and every fund has an expense ratio.
Missing a temporary fee waiver
Some funds waive part of their expenses for a period. The fee table shows the expense ratio before and after the waiver; the higher one can return later.
Forgetting the costs of trading ETFs
Spreads and commissions do not appear in the expense ratio. Frequent trading adds up.
What's the bottom line?
Fund fees are small percentages with long tails. The expense ratio is charged every year from fund assets; loads and other shareholder fees hit when you buy, sell or switch. Because fees compound, a fraction of a percent becomes thousands of dollars over decades. Read the fee table before you invest, compare similar funds, and model your own numbers with the fee impact calculator.
Frequently asked questions
Is a 1% expense ratio high?
It depends on what the fund does, but a percentage point compounds. In our hypothetical example, a 1% fee left about $14,095 less after 30 years than a 0.05% fee on the same $10,000. Compare funds with similar strategies.
Do I pay the expense ratio directly?
No. It is deducted from fund assets, so it shows up as a lower return rather than a bill. That is why it is easy to overlook.
Do ETFs have expense ratios?
Yes. ETFs have annual operating expenses just like mutual funds. They typically do not charge 12b-1 fees or sales loads, but trading them involves spreads and possibly commissions.
What is a 12b-1 fee?
A fee paid out of fund assets for distribution and sometimes shareholder services, such as paying brokers who sell the fund. It is included in the expense ratio. FINRA says it is capped at 1% of your assets in the fund.
Sources
Grade A = primary source (regulator, government agency, official rulebook or the index provider's own documents). Numbers in brackets in the text point here.
- U.S. SEC — Investor.gov. Mutual Fund and ETF Fees and Expenses – Investor Bulletin (2025). Accessed 2026-10-03.A
- U.S. SEC — Investor.gov. How Fees and Expenses Affect Your Investment Portfolio – Investor Bulletin (2025). Accessed 2026-10-03.A
- U.S. Securities and Exchange Commission. Mutual Funds and ETFs: A Guide for Investors (2016). Accessed 2026-10-03.A
- U.S. SEC — Investor.gov. Distribution and/or Service (12b-1) Fees (glossary) (2026). Accessed 2026-10-03.A
- FINRA. Mutual Funds (2026). Accessed 2026-10-03.A
- U.S. SEC — Investor.gov. No-Load Mutual Fund (glossary) (2026). Accessed 2026-10-03.A
This page is general education, not personal financial, tax or legal advice. Figures in worked examples are hypothetical and calculated before taxes and fees unless stated. Rules and limits change; check the linked primary sources for the current version. How we check every page.
