Investing can change your life for the better. But there's a common misconception that you need thousands of dollars just to get started. That's not the case. With the emergence of low-cost investing apps, you can start investing with as little as $100 or even less.
The most important step in investing is simply getting started. And this is true regardless of how large or small your initial investment dollars are. In this article, you'll learn six great ways to invest with just $100. By putting your money to work, you'll be well on your way toward long-term financial independence.
Six great ways to invest $100 starting today
You have $100 and are looking to invest it. Here are our six best suggestions for how to do that:
- Start an emergency fund.
- Use a micro-investing app or robo-advisor.
- Invest in a stock index mutual fund or exchange-traded fund (ETF).
- Buy fractional shares of stocks.
- Put it in your 401(k).
- Open an individual retirement account (IRA).
Now, let's take a look at each of these in more detail.
1. Start an emergency fund
You might be thinking, "This isn't an investment." And you're right. But consider what happens if you put $100 into stocks and then need to replace a car tire a week later. You'll have to sell what you just bought, possibly at a loss. That's why having cash in a savings account, even a small amount, is a crucial foundation for everything else.
According to The Motley Fool's average savings account balances research, only 55% of Americans have enough saved to cover three months of expenses, meaning nearly half would be forced to take on high-interest debt or liquidate investments in an emergency. If you already have a solid emergency fund, skip ahead. If you don't, using $100 to start one is the smartest first move you can make.
The good news is that savings account rates have improved meaningfully in recent years. As of spring 2026, you can easily earn 3% or more on your emergency savings, so the money isn't just sitting idle while you build it up. Not sure where to open one? Motley Fool Money rates and reviews the best high-yield savings accounts available today, so you can find a competitive rate without doing all the legwork yourself.
Aim to eventually have three to six months of expenses set aside, and more if you're a homeowner or have dependents.
2. Use a robo advisor
Once your emergency fund is in place, you're ready to start investing. If analyzing stocks and picking individual companies sounds overwhelming, a robo advisor is a great place to begin.
Robo advisors ask a few questions about your goals, age, income, family size, and risk tolerance, then build a customized portfolio of funds on your behalf. They handle all the details of selecting investments, rebalancing over time, and in many cases optimizing for tax efficiency too. Most charge less than 0.3% per year in management fees, or about $3 annually for every $1,000 invested, and many have no minimum deposit requirement. A $100 starting balance is more than enough.
3. Invest in index funds
Stocks are the most powerful wealth-building tool the average person can access. But picking individual winners is challenging, and individual stocks can be intimidating for newer investors. Index funds solve that problem.
When you invest in an index fund, you buy a piece of every company in that index at once. A $100 investment in an S&P 500 index fund, for example, gives you exposure to all 500 companies in that index. Over time, index funds have been excellent wealth-building tools, requiring minimal effort and carrying lower fees than most actively managed alternatives.
Legendary investor Warren Buffett has said that a simple, low-cost S&P 500 index fund is the best investment most people can make. Index funds are available as both ETFs and mutual funds, and both are easily purchased through any brokerage or investment app. For most beginners, ETFs are the simpler starting point.
Once you've built a solid foundation of index funds, you can branch out into other options. But an index fund might be all you'll ever really need.
4. Use fractional shares to buy stocks
If you have the time and interest to research individual companies, picking your own stocks can be a rewarding approach, especially once you already have a foundation of index funds in place.
Getting started is easier than ever. Most brokers no longer charge trading commissions, and many now offer fractional share investing, meaning you tell the broker how many dollars you want to invest rather than how many shares. If a stock trades at $500 and you invest $100, your account will show that you own 0.2 shares. The same fractional approach applies to most ETFs as well.
This makes it possible to own shares of well-known, high-quality companies without needing hundreds or thousands of dollars to buy a full share.
5. Put it in your 401(k)
If you have a 401(k) or other employer-sponsored retirement plan, funding it could be an excellent use of your investment dollars. That's especially true if you haven't maxed out your employer's matching contributions.
There's even more to like about investing in your 401(k): lower taxes. Every dollar you contribute to your 401(k) is considered a pretax contribution, meaning you won't pay income tax on that dollar for the year you contributed it to your account. Better yet, your investments will grow tax-free until you start taking distributions in retirement.
Are you self-employed? You can open a solo 401(k). You won't get the free money from an employer, but you can still take advantage of those pretax contributions and tax-free growth.
6. Open an IRA
If you want to invest for retirement beyond your 401(k), or you don't have access to a workplace plan, an IRA is a powerful option even at $100.
The math is compelling. If you invest $100 a month in an IRA for 30 years, the $36,000 you contribute would grow to nearly $180,000 based on the S&P 500's historical returns. That's the power of compounding over time.
With a traditional IRA, contributions may be tax-deductible and your money grows tax-free until withdrawal. With a Roth IRA, you contribute after-tax dollars but qualified withdrawals in retirement are completely tax-free. Roth contributions can also be withdrawn at any time without penalty, adding flexibility along the way. For 2025, IRA contribution limits are $7,000 per year, rising to $7,500 in 2026, with catch-up contributions available if you're 50 or older.
Not sure where to open one? Motley Fool Money has reviewed and ranked the best IRA accounts available today, so you can find the right fit and start putting your money to work.
Is investing $100 worth it?
It may not seem like $100 will make a meaningful difference. But the act of getting started builds financial habits that compound just as surely as investment returns do. Investing $100 one time might not create life-changing wealth. Investing $100 every month certainly can.
Based on the stock market's historical average annual return of roughly 10%, $100 invested monthly for 30 years grows to over $200,000. The number that matters most isn't the starting amount. It's consistency over time.
3 Ways not to invest $100
- Penny stocks. It might seem logical that low-priced stocks of small companies have high return potential, but the world of penny stocks is full of fraudulent companies and pump-and-dump schemes. If you're wondering how best to invest $100 in penny stocks, the answer is: don't.
- Cryptocurrency as a starter investment. Cryptocurrencies like Bitcoin (BTC -2.08%) can have a place in a diversified portfolio for experienced investors, but they're not an ideal starting point. The volatility is extreme and the learning curve is steep. Get the fundamentals right first.
- Day trading and options. Short-term trading strategies like day trading, options trading, and crypto speculation are not reliable paths to building wealth. They're closer in nature to gambling than investing. There's nothing wrong with a small amount of speculating if you're using money you can afford to lose, but it's critical not to confuse speculation with investing.
Tips to maximize your $100 investment
Use your first $100 to learn as well as invest. Most brokerage platforms have extensive educational tools, and there's no better way to understand how markets work than by having real money in them.
The single most effective way to maximize a $100 investment is to make it recurring. Set up an automatic transfer tied to your pay schedule, whether weekly, biweekly, or monthly, and let the habit build your portfolio for you. You'll be surprised at how quickly a small, consistent contribution can grow into something significant.Long-term or short-term
Long-term vs. short-term investing
Let's be clear. Investing is a long-term activity. It is the process of using your money to create wealth over time. As I've discussed several times throughout this article, the best way to use $100 is to start a long-term investment portfolio, focusing on things like stocks, ETFs, and mutual funds.
Short-term investments, such as day-trading, options trading, cryptocurrency trading, and more, are not reliable ways to build wealth over the long term. These are all speculative ways to try to use your money to make more money, and are closer in nature to gambling at a casino than they are to true investing.
To be clear, speculating has its place, and there's nothing wrong with doing a little bit of speculating if you do it with money you're prepared to lose if things don't go your way. But it's extremely important not to confuse investing with trading or speculating.
Don't wait to invest
If you've been holding off, don't wait any longer. Pick one or more of these six approaches, put your $100 to work, and commit to adding more whenever you can. The difference it makes over the long run will surprise you.
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