ETF Fee Impact Calculator

See how small expense ratio differences can compound into large long-term costs. Compare two ETFs side by side, net of fees.

Over 30 years, a 0.05% expense ratio ETF would grow $10,000 plus $500 a month at 7% to about $683,965, while a 0.50% fee fund would reach about $623,007 — the 0.45% fee gap costs roughly $60,958. Small expense ratios compound into large differences over decades. This calculator compares two ETFs side by side, net of fees, to show exactly what fund costs really add up to.

Your plan

Calculations run in your browser. Inputs are not stored.

Initial investment

Monthly contribution

Contribution frequency

Expected annual return (before fees)

Illustrative assumptions only. Adjust the rate for your own model.

Your gross return before any expense ratio is deducted.

ETF A expense ratio

Illustrative lower-fee scenario; enter the fund's actual expense ratio.

ETF B expense ratio

Illustrative higher-fee example.

Time horizon

30 years

Lower-fee ETF (A) after 30 years

$683,965

The fee gap costs you $0 over 30 years

ETF A final balance$683,965

ETF B final balance$623,007

Difference (fee drag)$60,958

ETF A (low fee)ETF B (high fee)

Show yearly breakdown

Year	Contributions	ETF A	ETF B

The default 7% is an illustrative nominal annual return before inflation, not a forecast or a historical real return. If inflation adjustment is enabled, it is applied once to the nominal result. Do not subtract inflation again from an already real return.

How this calculation works

The formula

Each ETF's expense ratio is subtracted from the expected annual return, then the net return is compounded over your time horizon:

net return = gross return − expense ratio

With contributions added at the end of each period and monthly compounding at the net rate i, the balance after N periods is:

FV = P · (1+i)^N + M · ( ((1+i)^N − 1) / i )

The same formula runs for ETF A and ETF B with their own net rates. The gap between the two final balances is the total cost of the fee difference.

Assumptions

Expense ratios are subtracted from the gross return before compounding — the standard net-of-fee simplification.
Contributions are added at the end of each period; returns compound monthly.
Results are pre-tax and exclude commissions, spreads and other transaction costs.
No market volatility is modeled — the return rate is assumed constant.
Results are hypothetical and for education only — not financial advice.

View the formula →

Educational purposes only. Not financial advice. See the full methodology and disclaimer.

Worked examples

See how expense ratios compound into real money over time. All examples assume $10,000 initial, $500/month contributions, and 7% annual return before fees.

Example 1: 0.05% vs 0.50% over 30 years

Low-fee ETF (0.05%)

$683,965

Higher-fee ETF (0.50%)

$623,007

Fee drag

$60,958

A 0.45% fee gap doesn't sound like much — it's less than half a percent per year. But over 30 years of compounding, that gap costs you $60,958. That's more than a full year of contributions ($6,000/year × 10 years = $60,000). The low-fee ETF ends with 9.8% more money. This is the core argument for low-cost index funds: every basis point you save in fees is a basis point that stays invested and compounds for you. Total contributions in both cases: $190,000.

Example 2: Same funds, but only 10 years

Same 0.05% vs 0.50% gap · same contributions · shorter horizon

Low-fee (0.05%)

$106,302

Higher-fee (0.50%)

$103,323

Fee drag

$2,978

Over 10 years, the same 0.45% fee gap only costs $2,978 — about 2.8% of the final balance. Compare that to 30 years, where it costs $60,958 (8.9% of the balance). This illustrates why fees matter disproportionately more the longer you invest. In the early years, fees eat a small absolute amount. But as your balance grows, the same percentage fee applies to a much larger number — and the money you lose to fees is money that would have compounded for decades. If you're 25 and investing for retirement at 65, that's a 40-year horizon where fees can cost you hundreds of thousands of dollars.

Example 3: Extreme fee gap — 0.03% vs 1.00%

Ultra-low-cost index vs typical active fund · 30 years · same contributions

0.03% index fund

$686,829

1.00% active fund

$562,483

Fee drag

$124,346

A 1% expense ratio was common for actively managed mutual funds in the 1990s and 2000s. Compared to a 0.03% ultra-low-cost index fund, that 0.97% gap costs $124,346 over 30 years — 18.1% of the final balance. The active fund would need to outperform the index by nearly 1% per year, every year, just to break even after fees. Study after study (including S&P Dow Jones Indices' SPIVA reports) shows that the vast majority of active funds fail to beat their benchmark over 10+ years, especially after fees. This is why Warren Buffett has repeatedly recommended low-cost index funds for most investors.

All examples assume a constant 7% annual return before fees, monthly contributions at month-end, and no taxes. Actual fund returns vary, and expense ratios may change. See full disclaimer.

ETF fees, explained

What is an ETF expense ratio?

An expense ratio is the annual fee a fund charges, shown as a percentage of your invested amount. It covers management and operating costs. Expense ratios vary by fund. Mutual funds and ETFs disclose annual operating expenses in a standardized fee table in the prospectus; compare the actual fund documents rather than relying on a universal fee range.

Why do small fee differences matter over time?

Because fees are deducted from your return every year before compounding, they compound against you too. A 0.45% fee gap looks tiny in year one but can be worth tens of thousands of dollars over 20–30 years — often far more than the raw fee amount.

Is the expected return before or after fees?

The expected annual return here is the gross return before any fees. This calculator subtracts each ETF's expense ratio from that return, then compounds the net return over your time horizon. That's the honest way to compare funds.

Does this include taxes?

No. Results are pre-tax and ignore trading commissions, bid-ask spreads and other transaction costs. The calculator isolates the effect of the expense ratio only.

Are ETF fees charged separately?

The expense ratio is generally reflected in the fund's net asset value rather than billed as a separate invoice. ETF investors may also face other costs, such as brokerage commissions and bid-ask spreads, that are not part of the expense ratio.

Should I always choose the lowest-fee ETF?

Generally, yes — for funds tracking the same index, the lowest expense ratio wins over the long term. But there are exceptions: (1) Tracking error — a slightly more expensive ETF may track its index more accurately. (2) Liquidity — larger ETFs have tighter bid-ask spreads, which can matter for frequent traders. (3) Tax efficiency — some ETF structures are more tax-efficient than others, especially for distributions. (4) Fund closure risk — very small ETFs may be liquidated. For most long-term buy-and-hold investors in major index ETFs (VTI, VOO, IVV, etc.), the expense ratio is the most important factor — differences of 0.01–0.03% are negligible, but differences of 0.5%+ are significant.

How do ETF fees compare to mutual fund fees?

ETFs generally have lower expense ratios than comparable mutual funds. The average equity ETF expense ratio is around 0.16–0.20%, while the average equity mutual fund is around 0.50–0.70% (and many actively managed funds charge 1%+). Index mutual funds can be as cheap as ETFs (e.g., Fidelity's zero-expense-ratio index funds), but ETFs offer intraday trading and often better tax efficiency. Some mutual funds also charge load fees (sales commissions) that ETFs don't have. When comparing, look at the total cost: expense ratio + any loads + transaction costs + tax impact.