You do not need thousands of dollars to start investing. With $100 and a smartphone, you can open a brokerage account and buy your first investment today. Here is how to make the most of a small starting amount.
Why Starting Small Still Matters
The most important factor in building wealth is time in the market, not the size of your first deposit. A $100 investment that earns 8% per year for 30 years grows to about $1,006. But if you wait 10 years to start, that same $100 invested for 20 years only grows to $466.
Starting small and adding consistently beats waiting until you have “enough.”
Step 1: Build a $500–$1,000 Emergency Fund First
Before investing, keep at least one month of expenses in a high-yield savings account. Investing money you might need in three months means you could be forced to sell at a loss.
If you already have a cushion, skip ahead.
Step 2: Choose the Right Account
The account type matters as much as what you invest in.
Roth IRA
If you have earned income and meet the income limits, a Roth IRA is one of the best places to invest. Contributions are made with after-tax dollars, but growth and withdrawals in retirement are tax-free. You can contribute up to $7,000 in 2026.
401(k)
If your employer offers a 401(k) with a match, contribute enough to get the full match before investing anywhere else. The match is an immediate 50–100% return.
Taxable Brokerage Account
No tax advantages, but no limits on contributions and no restrictions on when you can withdraw. Good for goals before retirement age.
Step 3: Pick a Brokerage With No Minimums
Several major brokerages let you open an account with $0 and buy fractional shares, meaning you can own a piece of any stock or ETF regardless of price.
Good options for beginners include Fidelity, Schwab, and Robinhood. All offer $0 commission trades and fractional shares.
Step 4: What to Buy With $100
For most beginners, a broad market index ETF is the right move. These funds hold hundreds of companies in a single investment, giving you diversification from day one.
Popular options:
- VTI (Vanguard Total Stock Market ETF) — owns every publicly traded U.S. company
- VOO (Vanguard S&P 500 ETF) — tracks the 500 largest U.S. companies
- SCHB (Schwab U.S. Broad Market ETF) — similar to VTI with a very low expense ratio
These ETFs have expense ratios under 0.05%, meaning you pay less than $5 per year on a $10,000 investment.
What to Avoid With a Small Starting Amount
Individual stocks — picking single stocks is hard even for professionals. With $100, putting it all in one company creates unnecessary risk.
Crypto — high volatility and speculation. Treat it as entertainment money, not a retirement strategy.
High-fee funds — any mutual fund or ETF with an expense ratio above 0.5% is taking too much of your return.
Step 5: Automate and Add More Over Time
Set up automatic contributions from your paycheck or bank account. Even $25 or $50 per month on top of your initial $100 compounds significantly over time.
$100 starting balance + $50/month for 30 years at 8% = $74,518.
The habit matters more than the amount.
Beginner Mistakes to Avoid
- Checking your portfolio daily and reacting to short-term moves
- Selling during a market dip — that locks in losses
- Waiting for the “right time” to invest — time in the market beats timing the market
- Forgetting to invest your tax refund or bonus
Bottom Line
Starting with $100 is not a limitation — it is a starting point. Open a Roth IRA or brokerage account at a no-minimum broker, buy a low-cost index ETF, and set up automatic contributions. The hardest part is starting. Everything else follows from that first $100.