Short answer: an investment fee comes out of your return every year, so its cost compounds. On money that sits invested for decades the gap is large: $500,000 left for 30 years grows to about $2.14 million at a 0.03% fee but about $1.62 million at 1%, assuming a 5% return before fees and after inflation. While you are still saving from scratch, a 1% fee delays financial independence by roughly a year in our example. The bigger hit comes in retirement, where 1% of a $1,000,000 portfolio is $10,000 a year, a quarter of a $40,000 budget.
How fees reach your return
A fund’s expense ratio, and any advisory fee on top, is charged as a percentage of your balance each year. The SEC puts it plainly: even small differences in fees can add up to substantial differences in returns over time, and a fund with higher costs must perform better than a low-cost fund just to give you the same result. Its own example: $100,000 growing 4% a year for 20 years ends about $10,000 lower with a 0.50% annual fee than with 0.25%, and lower still with 1%.
To check that example: $100,000 × (1 + 4% − fee)20 gives about $208,815 at 0.25%, $198,979 at 0.50% and $180,611 at 1%. Fees are approximated here as a straight deduction from the yearly return, the same simplification used throughout this page.
Money left to grow for 30 years
| Yearly fee | Return after fee | $500,000 after 30 years | Lost to fees vs 0.03% |
|---|---|---|---|
| 0.03% | 4.97% | $2,142,525 | — |
| 0.25% | 4.75% | $2,011,828 | $130,697 |
| 0.50% | 4.50% | $1,872,659 | $269,866 |
| 1.00% | 4.00% | $1,621,699 | $520,826 |
While you’re saving: the delay to your FIRE date
Starting from zero, much of your target comes from your own contributions, which fees touch only once they are invested. Example: $40,000 saved a year toward a $1,000,000 target ($40,000 of spending at a 4% withdrawal rate), 5% real return before fees.
| Yearly fee | Estimated years to $1,000,000 | Balance after 17 years |
|---|---|---|
| 0.03% | 16.7 | $1,030,914 |
| 0.25% | 16.9 | $1,011,362 |
| 0.50% | 17.1 | $989,668 |
| 1.00% | 17.7 | $947,900 |
About a year’s difference between the cheapest and most expensive rows. That is real, but smaller than many fee warnings suggest, because the contributions do most of the work early on. The damage grows with the balance, which is why fees matter most later.
In retirement: fees compete with your spending
| Yearly fee | Cost on $1,000,000 in a year | Share of a $40,000 budget |
|---|---|---|
| 0.03% | $300 | 0.75% |
| 0.25% | $2,500 | 6.25% |
| 0.50% | $5,000 | 12.5% |
| 1.00% | $10,000 | 25% |
Withdrawal-rate research usually ignores costs. Morningstar notes that its safe-withdrawal estimates don’t include expenses or taxes, both of which can further reduce what you can safely take (The State of Retirement Income: 2025). A 1% fee on top of a 4% withdrawal means the portfolio has to support 5% a year.
Where to find what you pay
- Fund expense ratios are in the fee table near the front of each fund’s prospectus, as the SEC bulletin explains.
- Advisory fees are in your adviser’s agreement and disclosure documents, on top of the funds’ own costs.
- 401(k) costs appear in the plan’s fee disclosure; the fund menu may offer a cheap index option even when others are expensive.
Low-cost index funds from the large brokerages charge a few hundredths of a percent; our brokerage comparison lists three, and the three-fund portfolio guide shows a whole portfolio at about 0.026% a year.
Sources
- SEC Office of Investor Education and Advocacy, Investor Bulletin: Mutual Fund Fees and Expenses.
- Amy C. Arnott and Christine Benz, The State of Retirement Income: 2025, Morningstar, December 3, 2025.
