How to Start Investing With $100

The internet is full of investment guides that assume you have a comfortable cushion already set aside. This one starts where most people actually are.

$100 is enough to open an account, make your first purchase, and prove to yourself that investing is something you do, not something other people do.

Why $100 is a real starting point

A lot of people wait to invest until they have more money. That wait costs more than the money itself. A $100 investment made today at an average annual return of 8% grows to about $466 in 20 years without adding another cent. Not life-changing on its own, but that first investment builds a habit. The habit is what changes things.

Step 1: Pick the right account type before you pick any investment

Before you choose what to buy, choose where to hold it. Two accounts matter most for beginners:

A brokerage account gives you flexibility. You can invest in anything, withdraw anytime, and there are no contribution limits. This is the right starting point if you are not sure what you want to do.

A Roth IRA grows tax-free. You invest after-tax dollars, and when you withdraw in retirement, you pay nothing. The contribution limit is $7,000 per year in 2026. If you expect to be in a higher tax bracket later in life, this is usually the better long-term choice.

With $100, you can open either one. Many platforms have no minimums.

Step 2: Put it in one broad ETF

Resist the urge to pick stocks. With $100, a single broad ETF (exchange-traded fund) is the move. A broad market ETF tracks hundreds of companies at once, which means you are not betting on any single one to succeed.

Look for an ETF that tracks the S&P 500 or the total US stock market. These are the workhorses of beginner portfolios because they are diversified, low-cost, and have decades of track records behind them.

Expense ratios under 0.10% are normal for this category. If you are paying more than that, shop around.

Step 3: Set up automatic contributions, even small ones

The single biggest multiplier on your $100 is adding to it regularly. Set up a recurring transfer, whether it is $10 a week or $25 a month. It does not need to be a large amount.

This strategy is called dollar-cost averaging. You buy more shares when prices are low and fewer when prices are high, without having to think about timing the market (which no one reliably does).

Step 4: Leave it alone

New investors often check their portfolios too often and sell when prices drop. That is the opposite of what builds wealth. Markets go down. Markets come back. The investors who do best are usually the ones who do the least.

A helpful rule: check your investments quarterly, not daily. Make changes once a year if anything needs rebalancing. The rest of the time, ignore it.

What about crypto and alternative assets?

With $100, you can access crypto and alternative investments, but think of them as additions to a foundation, not the foundation itself. If you want exposure to Bitcoin or Ethereum, a small slice, perhaps 5 to 10% of your total portfolio, gives you upside without making your results dependent on an asset that moves sharply in both directions.

Platforms like Clearhold let you hold traditional ETFs and alternative assets side by side in one portfolio view, so you can see how everything fits together without juggling multiple accounts.

What to do after your first month

After 30 days, you will have a sense of how investing actually feels compared to how you imagined it. At that point, consider doing two things.

First, review your contribution amount. Could you add another $10 a month without noticing? Do it. Small increases compounded over years are more powerful than any stock pick.

Second, read one article or chapter about the type of investment you made. Not to second-guess yourself, but to build the mental model that makes the next decision easier. Beginner investors who understand why they own what they own hold through downturns instead of selling at the bottom.

The only mistake that matters at this stage

The mistake that actually costs beginners money is not picking the wrong ETF. It is waiting. Waiting for more money, waiting for the market to drop, waiting to feel confident enough.

None of those conditions ever feel fully met. The investors who start with $100 and keep adding tend to outperform the ones who wait to invest $1,000 at the perfect moment.

Open the account today. Put in the $100. Set a recurring contribution. The rest is patience.