How ETF Expense Ratios Work

How ETF Expense Ratios Work and Why They Matter

Advanced7 min readUpdated March 17, 2026

Key Takeaways

✓The expense ratio is deducted daily from the fund's NAV, not charged as a separate fee to your account.
✓A 0.03% expense ratio on $100,000 costs just $30 per year, while 0.75% costs $750.
✓Expense ratio is the largest controllable factor in long-term ETF performance.
✓Some costs like trading spreads and securities lending revenue are not captured in the expense ratio.

The expense ratio is the most visible cost of owning an ETF, yet most investors do not fully understand how it works. It is not a fee charged to your account. It is not deducted from your dividends. And it is not the only cost of ETF ownership. Here is exactly how expense ratios function.

Daily NAV Deduction

The expense ratio is expressed as an annual percentage but deducted daily from the fund's net asset value. For VOO with a 0.03% expense ratio, approximately 0.000082% is deducted each trading day. This means the fund's NAV is marginally lower than it would be if the fund operated for free. You never see a fee on your brokerage statement because it is already reflected in the price.

For a $100,000 investment at 0.03%, you pay roughly $30 per year. At 0.75% (common for specialty ETFs), you pay $750. This may seem small, but over 30 years with compounding, the difference between 0.03% and 0.75% on a $100,000 investment amounts to tens of thousands of dollars in lost returns.

What the Expense Ratio Covers

The expense ratio pays for fund management, index licensing fees, legal and compliance costs, custody fees, administrative expenses, audit costs, and board of trustees compensation. It does not cover brokerage commissions you pay to buy or sell shares, bid-ask spread costs, or premium/discount to NAV.

Hidden Costs Beyond the Expense Ratio

Transaction costs within the fund (buying and selling securities during rebalancing) are not included in the expense ratio but do affect returns. These are captured in the tracking difference. Securities lending revenue, where the fund lends holdings to short sellers for a fee, can partially offset expenses and is also not reflected in the expense ratio.

Fee Wars and Their Impact

Competition among major issuers has driven broad-market ETF fees to near zero. Several issuers have introduced zero-fee ETFs as loss leaders to attract assets to their platforms. This fee compression has saved investors billions of dollars collectively and shows no sign of reversing.

When Higher Fees Are Justified

Not all higher-fee ETFs are bad deals. An active ETF with a skilled manager generating alpha after fees provides value. A commodity ETF with complex futures management necessarily costs more. Niche international ETFs accessing frontier markets incur higher operational costs. Judge fees relative to what you get — not on an absolute basis.

The Bottom Line

For core portfolio holdings where you are simply seeking market exposure, minimize expense ratios. The difference between 0.03% and 0.20% matters over decades. For satellite positions and specialized exposure, a moderate premium may be worthwhile. Use our education center to find the right balance of cost and capability for your portfolio.

Frequently Asked Questions

How is the expense ratio actually deducted?

The expense ratio is accrued daily and deducted from the fund's net asset value. For a 0.03% annual expense ratio, approximately 0.000082% is removed each day. You never see a line-item charge — it is simply reflected in a slightly lower NAV than the holdings would otherwise produce.

Is a higher expense ratio ever worth it?

Sometimes. An actively managed ETF or a niche strategy ETF may charge higher fees and still deliver value if it provides exposure not available elsewhere or consistently outperforms after fees. However, for broad market exposure, low-cost index ETFs are almost always the better choice.

What is a good expense ratio for an ETF?

For broad US equity index ETFs, anything under 0.10% is good and under 0.05% is excellent. For international ETFs, under 0.20% is reasonable. For specialized or active strategies, under 0.50% is acceptable. The asset-weighted industry average is around 0.15%.