How to Start Investing With Just $100
You don't need thousands to begin. Here's exactly how to start investing with $100 — using fractional shares and low-cost ETFs — and why the habit matters far more than the amount.
"I don't have enough money to invest" is the most common reason people never start — and it is almost always wrong. Thanks to fractional shares, $100 is plenty to begin. What you build at $100 is the habit, and the habit is what makes you wealthy.
$100 is enough — here's why
A single share of some companies costs hundreds of dollars. You do not need a whole share. Fractional shares let you buy a slice of any stock or ETF for as little as $1.
So your $100 can buy a piece of an expensive stock, a whole share of a low-cost ETF, or a little of several companies at once.
What to buy with your first $100
For most beginners, the simplest sensible first investment is a broad index ETF — one fund that holds hundreds of companies at once, so you are instantly diversified instead of betting on a single stock. It is low-cost, hands-off, and historically the market has returned about 10% a year over the long run.
The habit beats the amount
Here is the part that matters most: investing $100 once will not change your life — but investing a bit every month will. Putting in a fixed amount on a schedule (called dollar-cost averaging) removes the stress of timing and lets compounding do the work.
- $100/month at ~10% a year grows to roughly $20,000 in 10 years and ~$76,000 in 20 years.
- You did not need to be rich. You needed to start and keep going.
Your first $100, step by step
- 1Open a brokerage account (most have no minimum and no commissions on stocks/ETFs).
- 2Move in your $100.
- 3Buy a fractional share of a broad index ETF.
- 4Set a small recurring amount — even $20–50 a month.
- 5Leave it alone and keep adding. See how to buy your first stock.
Still in school or on a tiny income? Students can start investing too — the earlier you begin, the more the compounding does for you.
This is education, not investment advice.
Mohammad Khalid, Ph.D.
Founder, The Stocks School
Mohammad Khalid is an engineering professor and a long-term investor, with a Ph.D. in environmental and water resources engineering. He founded The Stocks School and presents its YouTube channel, which has more than 58,000 subscribers. His writing covers how to research a company before you buy it, how index funds and ETFs work, and why time in the market matters more than timing it. He is not a licensed financial adviser. About · How we research · His own portfolio
