Plain-language meaning
Expense ratio shows the annual operating cost of a mutual fund or ETF as a percentage of assets. Lower expense ratios leave more of the gross return for the investor, all else equal.
Example
A 0.25% expense ratio means annual fund operating expenses equal 0.25% of average net assets. On 20,000 invested, that is about 50 per year before considering growth and changing balances.
Limitations
Expense ratio is not the only investment cost. Trading spreads, transaction fees, taxes, advice fees, tracking difference and performance can matter. A calculator using expense ratio alone is a simplified cost estimate.
How this term affects your result
Expense ratio affects the result through the units, time period, rate, threshold or method used by the related calculator. Read it together with the page's formula and assumptions before comparing results across tools or sources.
What to check
- Use the same unit system, currency and time period as the related calculator.
- For regulated, health, tax, finance, safety or live-data topics, check the primary source named on the related page.
- If the term is used as a threshold, rate or category boundary, confirm the exact definition before relying on the estimate.
References
- Investor.gov: Expense Ratio - Investor education definition from the SEC.
- SEC: Mutual Funds and ETFs - A Guide for Investors - Explains fund fees and expense-ratio disclosure context.
FAQ
Is Expense ratio defined the same way everywhere?
Not always. Some terms are mathematical and stable, while others vary by country, institution, industry, product or data source.
Why link glossary terms to calculators?
Calculator users often need the term at the moment they interpret a result. Linking the definition to the calculator reduces ambiguity.