Mutual Fund Expense Calculator
This calculator can help you analyze the costs associated with buying shares in a mutual fund. By entering a few pieces of information, found in your fund's prospectus, you can see the impact of fees and operating expenses on your investment.
How the mutual fund expense calculator works
It grows your investment at the gross return and again at the return minus the fund's expense ratio, then takes the difference. Because the fee is charged on your whole balance every year, that gap compounds into a surprisingly large sum over time.
Worked example: with amount invested of $50,000, monthly contribution of $500 and annual return (before fees) of 7.00%, the mutual fund expense calculator shows lost to fees over time of $164,392.
- Balance with no fees
- $1,015,810
- Balance after fees
- $851,418
- Total lost to fees
- $164,392
- Share of growth lost
- 16.2%
The formula
Net growth uses (return − expense ratio) in place of the gross return; fees lost = balance at gross return − balance at net return.
Results are estimates for educational purposes and are not financial advice. Confirm exact figures with your lender, plan administrator or advisor.
Questions about the mutual fund expense calculator
How much do mutual fund fees really cost?
Far more than the small percentage suggests. Charged annually on your entire balance, a 0.75% fee can consume a double-digit share of your final balance over decades, as the calculator shows.
What is a good expense ratio?
Broad index funds often charge under 0.10%, while active funds can exceed 1%. Lower is almost always better, since fees compound directly against your returns.
Do fees matter more over long horizons?
Yes — the longer you invest, the more the annual drag compounds. Fee differences that look trivial in year one become large over twenty or thirty years.
Is the Mutual Fund Expense Calculator free to use?
Yes. Every calculator on FinCalculators is completely free, with no sign-up, login or paywall. You can run as many scenarios as you like.