How to Start Investing With $100

Yes, $100 is enough

Two changes made small-dollar investing practical. First, most large online brokerages no longer charge a commission to buy stocks and ETFs. Second, many of them offer fractional shares, which means you can buy part of a share. If one share of a fund costs $250, you can still put $100 into it and own 0.4 of a share. Your slice grows and shrinks in value exactly like a whole share would.

Before fractional shares, a $100 budget limited you to cheap stocks, which tend to be the riskiest ones. Now you can put the same $100 into a diversified fund instead. That's a much better starting point, as you'll see below.

A realistic expectation is important, though. $100 invested once won't change your life. What it does is get you started, teach you how the process feels, and give you a base to add to every month. The real power comes from repeating it, which we'll put numbers on later.

Three things to check before you invest

Investing is for money you won't need soon. Before you put in your first dollar, run through these three checks. They take ten minutes and can save you real trouble.

1. Do you have a small cushion? If your car breaks down next month and you have no savings, you may be forced to sell your investments at a bad moment, or borrow. Even a starter fund of a few hundred dollars helps, and our guide to building an emergency fund shows how to grow it.
2. Are you carrying high-interest debt? A credit card charging 22% a year costs you $220 annually on every $1,000 you owe. No investment can be counted on to earn that much, so paying that debt down is usually the better use of spare cash. Low-interest debt, like some student loans, is a different conversation.
3. Will you need this money within about five years? Stock markets can fall by a fifth or more in a bad year, and recoveries can take time. Money for a down payment next summer belongs in a savings account, not the market.

If you pass all three, you're ready. If you don't, that's useful to know too. Fixing one of them first is a perfectly good way to start your financial journey.

Step 1: Choose an account

An investment account is just a container that holds what you buy. The main choices for a beginner:

• A regular brokerage account (also called a taxable account). Flexible: you can add and withdraw money any time. You pay tax on dividends and on gains when you sell.
• An IRA (Individual Retirement Account). Built for retirement, with tax advantages. You need earned income to contribute, and taking money out early usually costs a penalty, with some exceptions. Our guide to retirement accounts compares Roth and traditional versions.
• An employer plan, like a 401(k). Contributions come straight out of your paycheck. If your employer matches part of what you put in, that match is effectively free money and is usually the best place to start.

To open an account you'll typically need to be 18 or older, provide your Social Security number and bank details, and answer a few questions about your experience. If you're younger, a parent or guardian can open a custodial account. Compare a few well-known brokerages and look for no account minimum, no account fees, fractional share support and easy automatic deposits.

Step 2: Decide what to buy

This is where beginners get stuck, so here's the simple version. With $100 you have three realistic options.

For most first-time investors, a broad index fund or ETF is a sensible starting point. It holds so many companies that no single failure can sink it. You're betting on the economy as a whole growing over decades, not on one company's quarter. Our lessons on index funds and on risk and diversification explain why this works.

If individual stocks tempt you, that's normal. A common approach is to keep the core of your money in a broad fund and use a small slice, say 10%, for companies you've actually researched. Our guide to researching a stock gives you a checklist.

Step 3: Check the fees

Fees are the quiet thief of investment returns, and the good news is they're easy to check. The main one for funds is the expense ratio, the yearly cost expressed as a percentage of what you hold. A broad index fund often charges well under 0.10% a year, which is under $0.10 for every $100 invested. Some actively managed funds charge 0.5% to 1% or more.

That gap looks tiny, but it compounds. On $10,000 invested with $200 added every month for 30 years, assuming a 7% yearly return before fees, a 0.05% fee leaves you with about $316,700, while a 1% fee leaves you with about $258,300. That's roughly $58,000 lost to a fee that sounded small.

Also look for trading commissions, account maintenance fees and transfer-out fees. For a $100 start, a brokerage that charges you $5 per trade would swallow a meaningful part of your money on day one, so choose one that doesn't.

Step 4: Place your first purchase

Once your account is funded, you'll search for the fund by name or ticker symbol (the short code, like three or four letters) and choose how much to buy. Two things are worth understanding.

• Market order vs. limit order. A market order buys right away at the current price. A limit order lets you set the most you're willing to pay, and it only goes through if the price is at or below that. For a large, popular fund, a market order is fine and simpler.
• ETF vs. mutual fund. ETFs trade throughout the day like stocks. Mutual funds are priced once at the end of the day, and some require a minimum first purchase, often $1,000 or more, though some have none. With $100, an ETF with fractional shares is usually the easiest route.

Enter the dollar amount, review the order, and confirm. Congratulations, you're an investor. Don't be surprised if the value drifts a little up or down in the first few days. That's normal and doesn't mean you did anything wrong.

Step 5: Automate the habit

The single most useful thing you can do after the first purchase is set up an automatic transfer and automatic investment, even if it's the same $100 every month. Automation removes the temptation to wait for a "better time", which nobody can predict anyway, and it makes saving feel like a bill you pay yourself.

Many brokerages let you schedule a recurring deposit and a recurring purchase of the same fund. Pick a date just after payday so the money moves before you can spend it. This approach is called dollar-cost averaging, and we compare it to investing a lump sum in a separate guide.

What $100 a month can become

Here's what steady monthly investing can look like. These figures assume a 7% average yearly return, a commonly used planning figure that roughly accounts for inflation. Real returns will bounce around, and some years will be negative, so treat this as an illustration, not a promise.

Notice what happens at 30 and 40 years. In the last decade the growth is bigger than the total you contributed, because your earlier gains are now earning gains of their own. That snowball effect is compound growth, and it's why starting early with a small amount beats starting late with a large one.

These are illustrations using a fixed rate, not predictions. Markets don't deliver steady returns, and you can lose money, especially over short periods.

What to do when the price drops

Sooner or later your $100 will be worth $92, or your balance will be down 20% after a rough year. It's one of the hardest moments for new investors, and what you do next matters more than almost any choice you made at the start.

A broad fund falling doesn't mean the money is gone. You only lose if you sell at the bottom and miss the recovery. Historically, broad markets have recovered from every decline, though it has sometimes taken years, and there's no guarantee about the future. If your time horizon is long and you didn't invest money you need soon, the usual advice is to keep contributing and avoid reacting to headlines.

If you find even small drops stressful, that's valuable information too. It might mean your mix of investments is riskier than you're comfortable with. A practice portfolio is a good place to feel this out first, and our simulator lets you fast-forward through good and bad years with play money.

A simple checklist to finish

1. Confirm you have a small cushion, no high-interest debt, and won't need the money for five years.
2. Open a brokerage account or IRA with no minimum and no commissions.
3. Choose a low-cost, broad index fund or ETF as your core holding.
4. Check the expense ratio and any account fees.
5. Make your first purchase, then set up an automatic monthly investment.
6. Check in a few times a year, not every day.

Frequently asked questions