Expense ratios are the most important fee in investing that most people never actually see — because they're never billed directly. The fund quietly deducts a fraction of your assets every year before publishing the daily price. Over a career of investing, that fraction can cost more than any one-time commission ever did.
What changed in 2026
- Fee compression continued. Broad-market index ETFs now regularly charge 0.03–0.05%, down from fractions that seemed impossibly low a decade ago. The race to zero is largely over for passive funds but the savings are real.
- Active funds are under pressure to justify their 0.50–1.25% fees; many failed to beat their benchmarks over trailing 10- and 15-year periods, making low-cost index alternatives the default for most investors.
- Robo-advisors added a layer. Platforms charging 0.25–0.50% sit on top of underlying fund expense ratios — always add both when comparing total costs.
- Semi-transparent and buffer ETFs entered mass retail with slightly higher expense ratios (~0.70–0.85%); understand what you're paying for before buying.
How an expense ratio works
When a fund advertises a 0.10% expense ratio, it deducts that share of assets from the fund's portfolio daily, proportionally. You never receive a bill. The fund's NAV or ETF price simply reflects returns after the fee has already been taken. A 10% market year in a fund charging 0.10% nets you roughly 9.90%.
| Fee tier |
Typical range |
What you find here |
| Ultra-low |
0.03–0.10% |
Broad-market index ETFs / mutual funds |
| Low |
0.11–0.30% |
Factor ETFs, niche index funds |
| Moderate |
0.31–0.75% |
Some active funds, sector ETFs |
| High |
0.76–1.50%+ |
Most active mutual funds, annuity sub-accounts |
The compounding cost
The damage isn't the percentage — it's the lost compounding on the fee taken year after year.
| Starting balance |
Years |
0.05% annual fee |
1.00% annual fee |
Difference |
| $50,000 |
30 |
~$1,400 total fees |
~$27,000 total fees |
~$25,600 |
| $200,000 |
20 |
~$2,200 total fees |
~$40,000 total fees |
~$37,800 |
These are rough illustrative figures assuming ~7% gross annual growth; actual results vary. The point: at scale, 1% costs far more than it looks on paper.
How to pick
- Identify what exposure you want — e.g., US total market, international developed, bonds.
- Find the lowest-cost fund offering that exposure. Compare at least 2–3 options.
- Add any platform fee (robo-advisor, 401(k) plan administrative fee) to the expense ratio.
- Check tracking error for index funds — a fund with a 0.03% expense ratio but 0.30% tracking error may underperform a 0.08% competitor.
- For active funds, check 10-year net-of-fee performance vs. benchmark before accepting a higher ratio.
Common mistakes
Ignoring the expense ratio on 401(k) options. Plan menus often include the same category of fund at wildly different costs. Always pick the lowest-cost broadly diversified option unless you have a compelling reason.
Comparing gross returns without fees. A fund posting "9% return" at 1% cost returned 8% net; a fund posting "8.5% return" at 0.05% returned 8.45% net. The cheaper one won.
Confusing expense ratio with load fees. A front-end or back-end sales load is a separate one-time charge; expense ratio is ongoing. Both matter but they're different.
Thinking "it's just 1%." See the compounding cost table above. It isn't just 1%.
What to skip
- High-expense-ratio target-date funds in a 401(k) — if your plan offers an expensive default, see whether you can substitute cheaper index components.
- Actively managed funds with expense ratios above 1% and no documented long-term benchmark outperformance — you're paying for underperformance.
- "Smart beta" or thematic ETFs above 0.50% without a clear thesis why the premium is worth it.
FAQ
Does a lower expense ratio always mean a better fund?
Not always — tracking error, liquidity, and tax efficiency also matter. But among funds offering identical exposure, lower cost is almost always the right tie-breaker.
Is the expense ratio deducted from dividends?
It's deducted from the overall fund assets continuously, not specifically from dividends. It reduces NAV before dividends are calculated.
Can expense ratios change?
Yes, funds can raise or lower them. Most index funds have trended lower over the past decade, but check the prospectus for any guaranteed caps.
What is a "good" expense ratio in 2026?
For a broad-market index fund or ETF: under 0.10% is excellent, 0.10–0.25% is fine, above 0.50% demands justification.
Where to go next
See What is an index fund in 2026, Active vs passive investing in 2026, and How to pick an index fund in 2026.