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How To Start Investing With $100 Or $500

By Cult of Money StaffUpdated Nov 10, 2026 · 12 min read
Advertiser disclosure: we may earn a commission from partners on this page. It never changes how we score or rank. Any investing information provided on this page is for educational purposes only. Investing in cryptocurrency and crypto assets is high risk. Don’t invest unless you’re prepared to lose all the money you invest. How we make money.

You can start investing with $100 or $500 today, because most large brokers now sell fractional shares from $1 and most crypto exchanges let you buy a few dollars of a coin. The bigger question is where that first money goes, and which fees take a large bite out of a small balance.

Quick Take

  • A broad index fund bought as $1 fractional shares is the simplest home for a first $100, and fund fees at big US brokers run from 0% to about 0.10% a year.
  • Flat monthly fees hurt small accounts most: a $5 monthly fee on a $100 balance costs $60 a year, or 60% of the money.
  • If you want crypto in the mix, keep it a small slice. On Nov 1, 2026, buying $100 of bitcoin cost about 7 cents to $1.20 on the advanced trading screens we measured.

Where $100 Or $500 Can Go

Option Minimum To Start Ongoing Cost Best For
Workplace 401(k) With A Match Any payroll percentage Fund fees, set by your plan Anyone whose employer matches contributions
Index Fund Or ETF At A Broker $1 with fractional shares 0% to about 0.10% a year for broad funds A first $100 you plan to leave alone
Target-Date Fund $0 to $1 at most big brokers Usually 0.10% to 0.75% a year People who want one fund that rebalances itself
Robo-Advisor About $10 A flat monthly fee or about 0.25% a year Hands-off investors who will add money every month
Bitcoin Or Ether On An Exchange A few dollars About 0.07% to 1.2% per buy on advanced screens, more on one-tap buttons A small, speculative slice
Spot Bitcoin ETF $1 with fractional shares About 0.25% a year Crypto exposure inside a brokerage account or IRA
Yourself The price of a book or course Your time Raising your income, which beats any return on $100

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Before You Invest Your First $100

Two things come before investing: a small cash cushion and paying down high-interest debt. Without savings, a surprise bill forces you to sell investments at a bad moment or put the bill on a credit card.

Credit cards are the main reason to wait. US card accounts that carried a balance were charged an average 22.36% APR in August 2026, according to the Federal Reserve's consumer credit report. Paying off a card at that rate is a guaranteed 22% return, and no stock or coin promises anything close. Our page on why you need an emergency fund covers how much to set aside.

The one exception is a workplace retirement match. If your employer adds 50 cents for every dollar you contribute, that's an instant 50% return, so contribute enough to get the full match even while you build savings.

How The Stock Market Works, In Plain English

A share of stock is a small piece of ownership in a company. If the company grows its profits, the shares tend to become worth more, and some companies also pay part of their profits to shareholders as dividends.

Shares trade on exchanges, which match buyers with sellers. The New York Stock Exchange traces its roots to 1792 and Nasdaq opened in 1971 as the first electronic market. Other countries run their own, such as the London Stock Exchange, the Toronto Stock Exchange and the Australian Securities Exchange. Almost all trading now happens electronically, and you reach these markets through a brokerage account.

There are two main types of stock. Common stock usually carries voting rights. Preferred stock usually doesn't, but it gets paid dividends first and ranks ahead of common shareholders if the company goes bankrupt. Most beginners only ever buy common stock, often without noticing, through index funds.

An index fund holds every company in a market index, such as the S&P 500. One $100 purchase of an S&P 500 fund spreads your money across about 500 large US companies. An exchange-traded fund (ETF) is a fund that trades like a single stock during the day.

Which Account To Open First

The account matters as much as the investment, because tax-advantaged accounts let your money grow without a yearly tax bill. Here are the main starter accounts in the countries where most Cult of Money readers live.

Country Starter Account 2026 Annual Limit Tax Treatment
US 401(k) Or 403(b) Through Work $24,500 Pre-tax or Roth, set by your plan
US Traditional Or Roth IRA $7,500 ($8,600 at 50+) Deduction now or tax-free withdrawals later
UK Stocks And Shares ISA £20,000 across all ISAs No tax on gains or dividends
Canada TFSA C$7,000 No tax on growth or withdrawals
Australia Superannuation Concessional cap set by the ATO each financial year Taxed at a lower rate, locked until preservation age
Anywhere Regular Brokerage Account No limit Gains taxed when you sell

US limits come from the IRS 2026 announcement, the UK figure from the government's ISA page and the Canadian figure from the Canada Revenue Agency. Australia's Taxation Office sets the super contribution caps each financial year.

With $100 or $500, a Roth IRA is a strong first choice for many US workers with modest incomes, because you pay tax now at a low rate and withdraw later tax-free. You can contribute up to the lesser of the annual limit or what you earned that year.

How To Invest $100

The plan for a first $100 fits in four steps.

  1. Open an account at a large, low-cost broker. Fidelity, Schwab and Robinhood charge $0 commissions on US stocks and ETFs and have no account minimum. Robinhood also serves the UK, with US shares from $1 and a Stocks and Shares ISA, and the EU, where it offers crypto and stock tokens that track share prices rather than the shares themselves.
  2. Buy a broad, low-fee index fund. A total-market or S&P 500 fund is enough on its own. Fidelity's ZERO index funds charge 0%, and the largest S&P 500 ETFs charge about 0.03% a year, which is 3 cents per $100.
  3. Use fractional shares. Fidelity and Robinhood let you buy most US stocks and ETFs in dollar amounts from $1. Schwab expanded $1 fractional trading to most US stocks and ETFs on June 2, 2026, inside its regular trade ticket.
  4. Set up an automatic deposit. Even $25 a paycheck matters more than the first $100, because the habit is what builds the balance.

Watch Out For Flat Fees On Small Balances

A percentage fee scales with your balance, but a flat fee doesn't. That difference decides which apps make sense for $100.

Betterment charges $5 a month on its Digital plan, and switches you to 0.25% a year once you have $24,000 or more invested or set up recurring deposits of $200 or more a month, according to its pricing page. On a $100 balance with no recurring deposit, $60 a year is 60% of the account. On $24,000 at 0.25%, the same $60 is a quarter of a percent.

M1 Finance lets you build a custom "pie" of stocks and funds that it rebalances, but it charges a $3 monthly platform fee unless you have more than $10,000 on the platform, according to M1's pricing page. On a $500 balance, that's $36 a year, or 7.2%.

The fix is simple. Either commit to the recurring deposit that drops the flat fee, or start at a commission-free broker and buy one index fund yourself until your balance is large enough for a robo-advisor's fee to be small.

How To Invest $500

With $500, the same plan applies, and you have room to split the money. Here's one example for a US reader with an emergency fund in place and no credit card debt.

Where Amount Why
Roth IRA, Total-Market Or S&P 500 Index Fund $400 Low cost, broad, tax-free growth
Roth IRA, International Index Fund $75 Spreads money beyond one country's companies
Bitcoin Or A Spot Bitcoin ETF $25 A 5% speculative slice you can afford to lose

That's an illustration, not a recommendation for your situation. A reader in the UK might do the same inside a Stocks and Shares ISA, and a Canadian reader inside a TFSA.

What happens after the first $500 matters more. Here's what steady monthly saving grows to at two hypothetical average annual returns. These are not predictions. Markets fall in some years, and real results will differ.

Monthly Deposit Of $100 Total Deposited At 4% A Year At 7% A Year
After 10 Years $12,000 $14,725 $17,308
After 20 Years $24,000 $36,677 $52,093
After 30 Years $36,000 $69,405 $121,997

A $500 start plus $50 a month for 10 years, or $6,500 deposited, comes to $8,108 at 4% and $9,659 at 7%. The deposits do most of the work early on, and growth takes over later.

Where Crypto Fits With A Small Budget

Crypto can be part of a small portfolio, but it belongs in the speculative slice, not the foundation. Large asset managers that include it have described 1% to 4% of a portfolio as a reasonable range, and our page on crypto portfolio allocation shows what a crash does at different sizes.

What It Costs To Buy $100 Of Bitcoin

With $100, a few dollars in fees is a real share of your money, so the trading screen you use matters. Our collector measured the cost of buying bitcoin on each exchange's advanced trading screen on Nov 1, 2026, using each one's lowest-tier fee. At those rates, a $100 purchase costs about:

Exchange Cost On $100 Where It's Available
Crypto.com About $0.52 US and most other countries
Kraken About $0.80 US (not New York), UK, EU, Canada, Australia
Coinbase About $0.88 US, UK, EU, Canada, Australia and more
Gemini About $1.20 US and Singapore only

The one-tap "Buy" button in most apps adds a spread or a flat fee on top of these numbers, so switch to the advanced screen once you're comfortable. Our best crypto apps ranking scores each app, and best cryptocurrency exchanges covers international options with availability. To open an account, see Crypto.com, Kraken or Coinbase.

You don't need to buy a whole coin. Bitcoin traded near $78,000 on Nov 1, 2026, so $100 bought about 0.0013 BTC. The same is true of ether, which traded near $2,270.

Crypto Inside A Brokerage Account Or IRA

A spot bitcoin ETF holds bitcoin for you and trades like a stock. The SEC approved the first US spot bitcoin ETFs in January 2024, and the largest, BlackRock's IBIT, charges about 0.25% a year. Canada has had spot bitcoin ETFs since 2021, Australia lists them on its main exchange, and the UK let retail investors buy crypto exchange-traded notes from Oct. 8, 2025. You don't get coins you can move to a wallet, but you also don't manage keys.

US readers who want actual coins in a retirement account can use a crypto IRA. Our best Bitcoin and crypto IRA providers page compares them, including the Public Crypto IRA, formerly Alto.

Ideas That Don't Belong In A First $100

Yield farming, new tokens and NFTs show up in a lot of "invest $100" lists. They carry far more risk than a beginner needs, and many high-yield offers from 2021 and 2022 ended in collapse. Staking a coin you already own is a milder way to earn rewards, and what is staking explains how it works and what can go wrong.

Investing In Yourself

The highest return on $100 often has nothing to do with markets. A course that leads to a raise, a certification or the tools for a side business can pay back many times over, and a $20 book can stop you from making a costly mistake.

A few long-running books cover the basics well: The Little Book of Common Sense Investing by John Bogle, The Intelligent Investor by Benjamin Graham and I Will Teach You To Be Rich by Ramit Sethi. Our page on ways to invest in yourself has more ideas.

Lessons From Our Own Writers

Picking individual stocks is the most common first move and often the worst one. Cult of Money writer Alexa Mason started buying individual stocks in 2014 and lost money on her picks, while a robo-advisor account she opened the same year gained. She moved her retirement money into diversified funds after that.

Her other lesson was to start before you feel ready. Investing isn't all or nothing, and you can learn with a small amount long before you're investing serious money.

Risks

  • Market losses. Stock indexes have fallen more than 30% several times, and you could need the money during a drop. Only invest what you won't need for at least five years.
  • Crypto volatility. Bitcoin has fallen more than 70% from its peak more than once. Treat any crypto as money you could lose.
  • Fees on small balances. A flat monthly fee or a one-tap crypto spread can cost more than a year of growth.
  • Scams. Anyone promising guaranteed returns, or asking you to send crypto to "unlock" a profit, is running a scam. Our list of common crypto scams shows the patterns.
  • Taxes. Selling at a gain in a regular account is taxable. US crypto platforms now report sales on Form 1099-DA.

FAQ

Is It Worth Investing Only $100?

Yes, mostly for the habit. $100 won't change your life, but setting up an account and an automatic deposit is the hard part, and later deposits grow from there. Make sure the account doesn't charge a flat fee that eats the balance.

What Is The Best Thing To Buy With My First $100?

For most beginners, a broad, low-cost index fund, such as a total-market or S&P 500 fund, is the simplest choice. It spreads your money across hundreds of companies in one purchase, and fees at large brokers run from 0% to about 0.10% a year.

Can I Buy Stocks With $100?

Yes. Fidelity, Schwab and Robinhood sell fractional shares of most US stocks and ETFs from $1, so $100 can buy part of an expensive share or a mix of several funds.

How Much Do I Need To Start Investing In Crypto?

Most exchanges let you buy a few dollars' worth of a coin. Use the advanced trading screen to keep costs down, and keep crypto a small part of what you invest.

Should I Pay Off Debt Or Invest First?

Pay off credit card debt first. The average card APR on balances was 22.36% in August 2026, which no investment reliably beats. The exception is an employer retirement match, which is worth taking even while you pay down debt.

Do I Need A Financial Advisor To Start?

No. A broad index fund or a robo-advisor covers most beginners. An advisor becomes more useful as your finances get more complicated, and our page on how to evaluate investments and find a financial advisor covers what to look for.

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