What is an expense ratio?

An expense ratio is the annual percentage of your fund assets that the fund company charges for management. It is deducted automatically from the fund's returns - you never write a check, but the drag on returns compounds over decades. Index funds like Vanguard's VTSAX charge as little as 0.03%, while actively managed funds often charge 0.5%–1.5% or more.

How much do high fees actually cost?

The impact is stunning over long periods. A 1% fee vs. a 0.05% fee on a $100,000 portfolio earning 7% per year costs roughly $200,000 over 30 years - money that compounds inside the fund with a low-fee provider instead of going to the fund company. This is why Warren Buffett consistently recommends low-cost index funds.

What gross return should I use?

The US stock market has returned approximately 7–10% per year nominally and 5–7% after inflation over long periods. A globally diversified stock/bond portfolio might use 6–7%. Use the same gross return for both scenarios - the calculator shows the difference attributable purely to fees.

What is the "no-fee" balance?

The no-fee balance shows what your portfolio would be worth if there were no fees at all - theoretically impossible in practice but useful as a benchmark. The difference between the no-fee balance and each scenario's balance shows the total cost of that fee level over the time horizon.

Investment Fee Calculator - See the True Cost of Fund Fees

Expense ratio comparison

Investment type	Typical expense ratio
S&P 500 index fund (Vanguard, Fidelity, Schwab)	0.03–0.10%
Total market index fund	0.03–0.15%
Robo-advisor (Betterment, Wealthfront)	0.25% + underlying fund fees
Actively managed domestic stock fund	0.5–1.5%
Hedge fund (institutional)	1–2% + 20% of profits
Financial advisor (fee-only AUM)	~1% AUM + underlying fund fees

The 1% fee impact

The long-term cost of higher fees is dramatic. Consider $100,000 invested for 30 years at 7% annual return:

At 0.10% fees (index fund): grows to approximately $743,000
At 1.10% fees (active fund): grows to approximately $574,000
Difference: ~$169,000 lost to fees over 30 years

The fee doesn't just reduce your return each year; it compounds against you every year, removing capital that would otherwise have grown.

Why fund fees matter so much

A 1% annual fee might sound trivial, but it is charged on your entire balance, including all previous growth, every single year. Over 30 years, that compounding drag can consume more than a quarter of your final portfolio value. John Bogle, founder of Vanguard, called this the "tyranny of compounding costs."

Index funds vs. active funds

Actively managed funds average expense ratios of 0.5%–1.5%, while index funds can be had for 0.03%–0.20%. Academic research (including SPIVA reports and Morningstar studies) consistently shows that the majority of actively managed funds underperform their benchmark index after fees over long time periods. Choosing a low-cost index fund is one of the most impactful financial decisions most investors can make.

Other fee types to watch

Beyond expense ratios, watch for sales loads (front-end or back-end commissions), 12b-1 marketing fees, and transaction fees. This calculator models the ongoing annual expense ratio drag, the most common and significant fee for long-term investors.

Investment Fee Calculator - See the True Cost of Fund Fees

Investment Details

Scenario A - Low-Fee Fund

Scenario B - High-Fee Fund

Balance over time by fee scenario