What the S&P 500 is and why beginners start here

The S&P 500 is a list of 500 large U.S. companies — Apple, Microsoft, Coca-Cola, and others — chosen and tracked by a company called Standard & Poor's. When you invest in the S&P 500, you own a small piece of all 500 companies at once, not just one. This matters because if one company's stock drops, the others may hold steady or rise, so your money is spread across many businesses instead of betting on a single one.

Beginners often start with the S&P 500 because the risk is lower than picking individual stocks, the fees are usually small, and you do not need much money to begin. You cannot buy the S&P 500 directly — it is not a stock you can purchase. Instead, you buy a fund that holds all 500 stocks for you. Two common types are index funds and exchange-traded funds (ETFs), and both track the S&P 500's performance.

Key Takeaways

  • You invest in the S&P 500 through a fund — either an index fund or an ETF — not by buying the index itself.
  • You need a brokerage account (opened online in minutes) to hold and trade these funds; popular brokers for beginners include Fidelity, Vanguard, and Charles Schwab.
  • Index funds and ETFs that track the S&P 500 charge annual fees (often 0.03% to 0.20% of your money per year), so compare before you choose.
  • You can start with as little as $1 to $100, depending on the fund and broker, and add money whenever you can.
  • The S&P 500 has historically returned about 10% per year on average over long periods, but past performance does not may provide future results.

Opening a brokerage account

Before you can buy any fund, you need a brokerage account — a place to hold your money and make trades. You open one online by visiting a broker's website, providing your name, address, Social Security number, and employment information, and linking a bank account. The whole process takes 10 to 15 minutes. The broker verifies your identity and your account is usually ready the same day or within one business day.

Common brokers for beginners are Fidelity, Vanguard, Charles Schwab, and E-Trade. All of them offer S&P 500 index funds and ETFs with low fees. Some brokers offer fractional shares, meaning you can buy a piece of a fund for $1 instead of waiting to save $100 or more. Check whether the broker charges account maintenance fees (most do not) and whether they offer the specific S&P 500 fund you want to buy.

Choosing between index funds and ETFs

Both index funds and ETFs hold the same 500 stocks and track the S&P 500, but they work differently. An index fund is a mutual fund you buy directly from the fund company or through a broker. You place an order during the day, but the trade happens once per day after the market closes, at a price set at the end of that day. An ETF trades like a stock — you buy and sell it during market hours at a price that changes throughout the day.

For a beginner, the practical difference is small. Index funds are simpler if you plan to buy once and hold for years without watching prices. ETFs are useful if you want to trade during the day or set a specific price at which you want to buy. Both charge annual fees (called expense ratios), usually between 0.03% and 0.20% per year. A $5,000 investment in a fund with a 0.10% expense ratio costs you $5 per year in fees.

Popular S&P 500 index funds include Vanguard 500 Index Fund (VFIAX), Fidelity 500 Index Fund (FXAIX), and Schwab U.S. 500 Index Fund (SWXRX). Popular ETFs include Vanguard S&P 500 ETF (VOO), iShares Core S&P 500 ETF (IVV), and Schwab U.S. 500 ETF (SWPPX). All track the same index and have low fees; the choice between them matters less than starting.

How much money to start with and how often to add

You can start with as little as $1 to $100, depending on your broker and the fund. Some brokers allow fractional shares, so you can invest any dollar amount. Others require a minimum first purchase (often $500 to $1,000 for index funds, though ETFs can be cheaper). Check your broker's rules before you open the account.

Many beginners start with a lump sum and then add money regularly — $50 or $100 per month, for example. This approach, called dollar-cost averaging, means you buy more shares when prices are low and fewer when prices are high, which can reduce the impact of market swings over time. You do not need to time the market or wait for the "right" price; regular investing over years tends to smooth out short-term ups and downs.

Understanding what happens after you buy

Once you own shares of an S&P 500 fund, you own a piece of 500 companies. The value of your shares changes every day as the stock market moves. If the S&P 500 goes up 5% in a year, your fund goes up roughly 5% (minus the small annual fee). If it drops 10%, your fund drops roughly 10%. You do not have to do anything — the fund automatically holds all 500 stocks and rebalances them as needed.

Some S&P 500 funds pay dividends, which are small cash payments from the companies' profits. Your broker can reinvest these dividends automatically, buying more shares with the money, or send them to your account as cash. For beginners, automatic reinvestment is usually the simpler choice because it keeps your money working without extra steps.

Tax accounts and where to hold your investment

You can hold an S&P 500 fund in different types of accounts, and the type matters for taxes. A regular taxable brokerage account has no contribution limits and no tax breaks — you pay taxes on gains and dividends each year. An Individual Retirement Account (IRA) lets you contribute up to $7,000 per year (as of 2024, though this amount changes) and delays taxes until you withdraw money in retirement. A 401(k) through your employer works similarly and may include an employer match, which is assistance programs.

For a beginner with no retirement account yet, an IRA is often the best starting point because it offers tax advantages and you can open one at any broker. If your employer offers a 401(k) match, prioritize that first — it is the closest thing to may provide return on your money. After that, an IRA is the next logical step. A taxable brokerage account makes sense once you have maxed out your IRA contributions.

Common mistakes to avoid

Beginners often try to time the market — waiting for prices to drop before buying, or selling when they rise. This rarely works because nobody knows when the market will move. Instead, invest regularly regardless of price. Another mistake is checking your balance too often and panicking when it drops. The S&P 500 falls sometimes, but historically it has recovered and reached new highs. If you are investing for 10 or more years, short-term drops do not matter.

A third mistake is choosing a fund with high fees. A fund charging 1% per year instead of 0.10% costs you 10 times as much and compounds over decades. Always check the expense ratio before you buy. Finally, do not invest money you will need within five years. The stock market can be down when you need the cash, and you may have to sell at a loss. Keep emergency money in a savings account, not in stocks.

Frequently Asked Questions

How much money do I need to start investing in the S&P 500?

You can start with $1 if your broker offers fractional shares, or $100 to $500 if it does not. Some brokers have no minimum; others require $500 to $1,000 for the first purchase. Check your broker's website before you open an account. The amount matters less than starting and adding money over time.

Can I lose all my money investing in the S&P 500?

Losing everything would require all 500 companies to fail at once, which has never happened in U.S. history. You can lose money in the short term — the S&P 500 has dropped 20% or more in some years — but it has always recovered and reached new highs over longer periods. If you invest for 10 or more years, the risk of permanent loss is very low.

Should I buy an index fund or an ETF?

Both track the S&P 500 and charge similar low fees. Index funds are simpler if you buy once and hold; ETFs trade like stocks and are useful if you want to buy or sell during market hours. For most beginners, the difference is small. Pick whichever your broker makes easiest and start.

Do I have to reinvest dividends?

No, but most beginners should. Reinvesting dividends automatically buys more shares with the cash payments, which compounds your growth over time. You can change this setting anytime in your account. If you need the cash, you can turn off reinvestment and receive dividends as money instead.

What if the stock market crashes after I invest?

If you are investing for years, a crash is actually an opportunity — your regular contributions buy more shares at lower prices. If you need the money soon, a crash is a problem and you should not have invested it. Keep money you need within five years in a savings account, not stocks.