Mutual Funds or ETFs: Which Should You Choose as a DIY Investor?

Key Takeaways

• ETFs are more tax-efficient than mutual funds in taxable accounts due to lower turnover and fewer distributions, but this advantage disappears in tax-advantaged accounts like IRAs where you should focus on other factors
• Set up automatic investing with mutual funds to keep your portfolio on autopilot—ETFs don't support automatic investing at most custodians, so money may sit uninvested if you forget to manually rebalance
• Account for hidden costs when trading ETFs: bid-ask spreads add implicit costs, and frequent trading triggers capital gains taxes plus potential wash sale rule penalties that can surprise investors at tax time
• Mutual funds have minimum investment requirements (often $1,000+) that can slow your progress toward target asset allocation, while ETFs only require a single share price with fractional share options at many custodians
• You don't have to choose just one—consider using both mutual funds and ETFs together to capture the advantages of each based on your portfolio's specific circumstances and investment habits