How to Pick an ETF Without Losing Your Mind (A Simple 5-Step Checklist)

There are over 3,000 ETFs available in North America. That's an overwhelming number of options for someone who just wants to start investing. The good news? You can ignore 99% of them. Here's a simple 5-step checklist that cuts through the noise and helps you pick the right ETF in under ten minutes.

Step 1: Check the Expense Ratio

The expense ratio is the annual fee you pay for owning the ETF, expressed as a percentage. A 0.03% expense ratio means you pay $3 per year for every $10,000 invested. A 1.00% expense ratio means $100 per year on that same $10,000. Over decades, the difference is enormous. As a rule of thumb, look for ETFs with expense ratios below 0.20%. The best broad market ETFs charge 0.03% to 0.10%. If an ETF charges more than 0.50%, you'd better have a very good reason for choosing it. Fees are the one factor that's entirely within your control, and lower fees mean more of your returns stay in your pocket.

Step 2: Understand What It Tracks

Every ETF follows an index or strategy. A total market ETF tracks thousands of companies across the entire stock market. An S&P 500 ETF tracks the 500 largest U.S. companies. A sector ETF might only hold tech stocks, energy stocks, or healthcare stocks. For beginners, broad market ETFs are almost always the best starting point. They give you instant diversification across hundreds or thousands of companies without needing to pick sectors or themes. Sector and thematic ETFs are fine as supplements, but they shouldn't be your core holding.

Step 3: Check Assets Under Management

Assets under management (AUM) tells you how much money is in the fund. Bigger funds are generally better for individual investors because they're more liquid — meaning you can buy and sell easily without moving the price. Look for ETFs with at least $1 billion in AUM. The largest ETFs like SPY, VOO, and VTI have hundreds of billions, which means tiny spreads and easy trading. Small, niche ETFs with under $100 million might have wider bid-ask spreads and could even shut down if they don't attract enough investors.

Step 4: Look at Long-Term Performance

Check the 5-year and 10-year returns. Past performance doesn't guarantee future results, but it gives you a sense of what the ETF's underlying index has done historically. For broad market ETFs, you should see something in the ballpark of 8-12% average annual returns over 10 years. If an ETF has dramatically underperformed its benchmark, something might be wrong. Also compare the ETF's return to its index — the difference is called "tracking error." A well-managed ETF should closely match its index minus the expense ratio.

Step 5: Check for Overlap

If you already own one ETF, make sure a second one doesn't hold all the same stocks. For example, if you own VTI (total U.S. market), buying VOO (S&P 500) adds very little because VTI already includes all 500 S&P companies. Instead, pair a U.S. market ETF with an international ETF or a bond ETF for true diversification. Tools like ETF overlap checkers (available free online) can show you exactly how much two ETFs have in common.