Mutual Fund Calculator
See how expense ratios and load fees quietly eat into fund returns over decades.
About Mutual Fund Calculator
Mutual fund fees compound against you the same way returns compound for you. A 1% expense ratio means the fund needs to earn 1% more than an index fund just to break even — and this gap widens every year. Front-end loads reduce your invested capital on day one; back-end loads (contingent deferred sales charges) reduce what you receive when you sell. Index funds and ETFs typically have expense ratios under 0.10%, versus 0.5–1.5% for actively managed funds.
Formulas
Net return after expense ratio
Net return = Gross return − Expense ratio
- r_gross
- Expected gross annual return
- ER
- Expense ratio (annual %)
Invested amount after front-end load
Net invested = Initial investment × (1 − Front-end load)
- I
- Initial investment
- L_f
- Front-end load rate (decimal)
Worked example
With the default values below, Mutual Fund Calculator returns Net Balance (after fees) of $374,628.94. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Initial Investmentminimum 0 $
- 25,000 $
- Monthly Contributionminimum 0 $
- 500 $
- Expected Annual Return (gross, %)accepts 0–50
- 8
- Expense Ratio (% per year)accepts 0–5
- 0.75
- Front-End Load (%)accepts 0–10
- 0
- Back-End Load (%) — CDSCaccepts 0–10
- 0
- Investment Horizon (years)accepts 1–50
- 20
Results
- Net Balance (after fees)
- $374,628.94
- Gross Balance (no-fee benchmark)
- $417,680.28
- Total Fee DragThe compounded wealth lost to fees.
- $43,051.34
- Fee Drag as % of Gross
- 10.31%
- Total Amount Invested
- $145,000.00
- Net Annual Return (%)
- 7.2500%
Step by step
- 1Amount invested after front-end load= $25,000.00No front-end load
- 2Net annual return after expense ratio= 7.2500%
- 3Gross balance (no fees benchmark)= $417,680.28
- 4Net balance after all fees= $374,628.94
- 5Total fee drag= $43,051.3410.31% of gross balance consumed by fees
Assumptions and limits
- The result is derived only from the 7 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation into account.
- Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
- This is an estimate for general information and not professional financial, tax or legal advice. See the full disclaimer for the limits that apply to this kind of calculator.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
What is an expense ratio?
An expense ratio is the annual cost of owning a fund, expressed as a percentage of assets under management. A 0.75% ratio means the fund charges $7.50 per year for every $1,000 invested. It's deducted directly from fund assets, so the NAV you see already reflects it — but its compounding impact on your long-term wealth is enormous.
What is a front-end load?
A front-end load (Class A shares) is a sales commission taken upfront. If you invest $10,000 in a fund with a 5.75% load, only $9,425 actually gets invested. The broker receives the rest. Many funds offer load waivers at higher investment amounts.
Are no-load funds always better?
No-load funds have no direct sales commissions, but may still carry significant expense ratios. An actively managed no-load fund at 1.2% can still underperform an index fund at 0.03%. For long-term investors, minimizing the expense ratio matters far more than avoiding loads.
How do I find a fund's expense ratio?
It's disclosed in the fund's prospectus and on fund screener sites. It appears as a percentage in the 'Fees & Expenses' section. Morningstar, ETF.com and the fund company's own website all list it prominently.