ETFs vs Mutual Funds: The Differences That Matter
Same underlying holdings, different plumbing. The plumbing matters mainly in taxable accounts.
At a glance
Figures checked 1 Sep 2026
What to take away
- In a 401(k) or IRA the wrapper is close to irrelevant — pick whichever has the lower fee.
- In a taxable account ETFs usually distribute fewer capital gains.
- Mutual funds are easier to automate in exact dollar amounts.
| ETF | Mutual fund | |
|---|---|---|
| Pricing | Continuous during market hours | Once daily at NAV |
| Minimum | One share, often fractional | Sometimes $1,000–$3,000 |
| Automatic investing | Depends on broker | Straightforward |
| Capital gains distributions | Usually minimal | Can be significant |
| Bid-ask spread | Yes, small on large funds | None |
Why ETFs distribute fewer gains
When mutual fund investors sell in volume, the fund may have to sell holdings and distribute realised gains to everyone still in it — including people who did nothing. ETFs largely avoid that through in-kind creation and redemption, so unwanted taxable events are rarer.
This only matters in a taxable brokerage account. Inside an IRA or 401(k), distributions are not taxable events and the comparison collapses to cost and convenience.
Common questions
Many brokers now support recurring fractional ETF purchases. If yours does not, a mutual fund is simpler for automated monthly investing.
Commission-free trading is standard at major US brokers. You still pay the bid-ask spread, which is negligible on large, liquid funds.