Key Takeaways
- ETFs let you buy a basket of hundreds or thousands of stocks in a single trade, starting at $1 at most brokerages.
- Account type matters more than fund selection. A Roth IRA shelters your gains from taxes forever; a taxable account does not.
- Two funds cover the entire US stock market: VTI (0.03%) or VOO (0.03%). Adding VXUS (0.07%) adds international exposure. Adding BND (0.03%) adds bonds. That is a complete portfolio.
- Automating contributions eliminates the temptation to time the market, which is the single most expensive mistake new investors make.
- Past performance does not guarantee future results.
Step 1: Choose your account type
Before you pick a single fund, pick the right account. The account type determines how your gains are taxed, which over 30 years dwarfs any difference between funds.
Roth IRA — best for most people under 50
You contribute after-tax dollars up to $7,000 per year in 2026 ($8,000 if you are 50 or older). All growth inside the account compounds tax-free, and qualifying withdrawals in retirement are tax-free. If you expect to be in a higher tax bracket in retirement than you are now, or if you simply want to never pay taxes on your investment gains, the Roth IRA is the best account available to most earners below the income phase-out ($150,000 for single filers, $236,000 for married filing jointly in 2026).
401(k) with employer match — do this first if your employer offers it
If your employer matches contributions, that match is an immediate 50–100% return on the matched portion of your contribution. A 50% match on the first 6% of salary is a guaranteed 50% return before the market does anything. Contribute enough to capture the full match before funding a Roth IRA. The funds inside your 401(k) may be limited to what your employer offers, but the tax benefit and free money make it the priority.
Taxable brokerage account — after the above are maxed
No contribution limits. No restrictions on withdrawals. Dividends and capital gains are taxed in the year they occur. The flexibility makes taxable accounts the right vehicle once you have maxed your 401(k) match and Roth IRA, or if you need access to money before retirement age. ETFs are tax-efficient in taxable accounts because they rarely generate capital gains distributions — unlike actively managed mutual funds.
Order of operations for most people: (1) 401(k) up to full employer match, (2) Roth IRA up to $7,000/year, (3) back to 401(k) up to $23,500 annual limit, (4) taxable brokerage for anything beyond that.
Step 2: Open a brokerage account
All three of the major brokerages below charge $0 commissions on ETF trades and have no account minimums. The right choice is often determined by where your 401(k) lives or which platform's interface you find easiest to use.
- Fidelity — strongest fractional share support, excellent mobile app, zero-expense-ratio index mutual funds for accounts that prefer mutual funds over ETFs
- Schwab — best for investors who want a full banking relationship alongside brokerage; good fractional share support via Schwab Stock Slices
- Vanguard — best if you plan to hold Vanguard ETFs long-term; interface is dated but the ownership structure (Vanguard is owned by its funds, which are owned by investors) creates a structural incentive to minimize costs
Opening takes 10–15 minutes. You will need your Social Security number, a government-issued ID, and your bank account and routing number for the initial transfer.
Step 3: Pick your ETFs
Most new investors need fewer funds than they think. The decision is not which of 3,000 ETFs to pick — it is which of three basic building blocks to use and in what proportion.
The core funds
3,700+ US stocks. Covers large, mid, and small caps. The closest thing to owning the entire US economy.
503 largest US companies. Slightly more concentrated than VTI but has tracked it within 0.5% annually over the past decade.
8,400+ stocks across Europe, Asia, and emerging markets. Complements VTI for global diversification.
11,000+ US bonds. Reduces portfolio volatility. Appropriate once you are within 10 years of needing the money.
One fund: VTI or VOO — covers the US stock market at minimum cost. No other decisions required.
Two funds: VTI (60%) + VXUS (40%) — global diversification. The 60/40 US/international split approximates global market cap weighting.
Three funds: VTI (60%) + VXUS (30%) + BND (10%) — the classic three-fund portfolio. Adjust bond allocation based on your time horizon. Longer time horizon = less bonds needed.
Sector ETFs, leveraged ETFs, thematic ETFs, and individual stocks all require additional research and carry risks that a diversified total-market fund does not. They are not wrong — they are not appropriate as a starting point before you have the basics in place.
Step 4: Automate your contributions
Every major brokerage offers automatic investing: you set a dollar amount, a frequency (weekly, biweekly, monthly), and the fund you want to buy, and the brokerage does the rest. Set this up on the same day you open the account.
The math behind consistency is not subtle. An investor who contributes $500 per month for 30 years at 7% annual return ends up with approximately $567,000. An investor who contributes the same amount but tries to time the market — skipping months when conditions look bad, doubling up when they look good — has a high probability of buying high and selling low enough times to meaningfully underperform the automatic investor.
Automation also removes the monthly decision from your to-do list. There is nothing to check, nothing to adjust, nothing to debate with yourself. The money moves, the shares purchase, and your portfolio grows without requiring your attention.
Step 5: Leave it alone
The S&P 500 has declined 20% or more nine times since 1950. Every single time, it recovered to new highs. Investors who stayed invested through those declines captured the full recovery. Investors who sold during the decline locked in their losses and then had to decide when to buy back in, which almost no one does correctly.
Check your portfolio once per year. Rebalance if your allocation has drifted more than 5–10 percentage points from your target. Use new contributions to buy whichever fund is below its target weight rather than selling the outperformer — this avoids taxable events in a brokerage account.
Increase your contribution amount when your income increases. Keeping your lifestyle constant while income grows is the most reliable path to building significant wealth. A 1% salary increase directed entirely to investing compounds far more than a 1% increase in lifestyle spending.