Expense Ratio Calculator
Results are estimates based on the values you enter. Recheck your inputs and assumptions before using the output for decisions.
Calculate fund expense ratio from annual operating expenses and average net assets, and estimate investor-level annual and monthly cost.
Expense Ratio Calculator
Free online expense ratio calculator to estimate a fund’s expense ratio from annual operating expenses and average net assets, and to translate that ratio into investor-level cost. This calculator is useful for fund investors, finance students, advisers, retirement savers, analysts, and anyone comparing mutual funds, ETFs, index funds, or other pooled investments. Expense ratio is one of the most important recurring cost measures in investing because it shows how much of a fund’s assets are consumed each year by operating expenses. Even when the percentage looks small, the dollar impact can matter over time, especially on larger balances.
This page uses three inputs. Annual operating expenses means the fund’s yearly operating cost. Average net assets means the average asset base over the same period. Investment amount means the investor balance used to estimate personal annual and monthly cost. Once those values are entered, the calculator shows expense ratio, annual cost on investment, monthly cost on investment, and annual cost per $10,000 invested. These outputs make the result easier to understand because some users want the fund-level ratio while others want to see what that ratio means in actual dollars on their own money.
The formula of expense ratio
Expense ratio = Annual operating expenses / Average net assets
Annual cost on investment = Investment amount x Expense ratio
Monthly cost on investment = Annual cost on investment / 12
Annual cost per $10,000 invested = Expense ratio x 10000
Here annual operating expenses means the fund’s total yearly operating cost, average net assets means the average asset balance on which those expenses are spread, expense ratio means the percentage of assets used for expenses each year, annual cost on investment means the estimated yearly cost on the entered investment amount, and annual cost per $10,000 invested gives a standard comparison measure across funds.
Solved Example
Example 1: Find the expense ratio if annual operating expenses are $2,000,000, average net assets are $250,000,000, and investment amount is $10,000.
Solve: Expense ratio = 2000000 / 250000000 = 0.008 = 0.80%
Annual cost on investment = 10000 x 0.008 = $80
Monthly cost on investment = 80 / 12 = $6.67
Annual cost per $10,000 invested = 0.008 x 10000 = $80
Example 2: Find the result if annual operating expenses are $900,000, average net assets are $300,000,000, and investment amount is $25,000.
Solve: Expense ratio = 900000 / 300000000 = 0.003 = 0.30%
Annual cost on investment = 25000 x 0.003 = $75
Monthly cost on investment = 75 / 12 = $6.25
Example 3: Find the result if annual operating expenses are $5,000,000, average net assets are $400,000,000, and investment amount is $50,000.
Solve: Expense ratio = 5000000 / 400000000 = 0.0125 = 1.25%
Annual cost on investment = 50000 x 0.0125 = $625
Monthly cost on investment = 625 / 12 = $52.08
Annual cost per $10,000 invested = 0.0125 x 10000 = $125
Table of expense ratio calculator
| Annual Expenses | Average Net Assets | Expense Ratio | Cost per $10,000 |
|---|---|---|---|
| $900,000 | $300,000,000 | 0.30% | $30 |
| $2,000,000 | $250,000,000 | 0.80% | $80 |
| $5,000,000 | $400,000,000 | 1.25% | $125 |
| $7,500,000 | $500,000,000 | 1.50% | $150 |
How to use this expense ratio calculator
Enter the annual operating expenses in the proper input field. After that, enter the average net assets for the same fund and period. Then enter the investment amount you want to use for a personal cost estimate. Click the calculate button and the calculator will show the expense ratio, annual cost on investment, monthly cost on investment, and annual cost per $10,000 invested in the result box.
This calculator is useful when comparing low-cost and high-cost funds, reviewing retirement plan choices, checking ETF and mutual fund fees, or explaining fund expenses in more practical dollar terms. A lower expense ratio usually means less drag on long-term returns, while a higher expense ratio means more of the portfolio is absorbed by operating costs each year. Looking at the annual and monthly cost on a sample investment balance makes the ratio easier to understand than a percentage alone.
When using the result, remember that expense ratio is only one part of total investment cost. Trading costs, loads, taxes, spreads, performance fees, and tracking difference may also affect real investor outcomes. Even so, expense ratio remains one of the clearest first-pass measures of recurring fund cost. This calculator gives a fast numerical view that supports fund comparison, fee awareness, retirement planning, and investment education.