If you had put $1,000 into an S&P 500 index fund 30 years ago, you would have around $20,000 today, even after the dot-com bust and the 2008 crash. That kind of long-run performance is why learning how to invest in the S&P 500 is the first thing most financial planners teach new investors.
The good news is that buying the S&P 500 is much simpler than picking individual stocks. You do not need a finance degree, a stockbroker, or a big balance. You need a brokerage account, a few dollars, and about 15 minutes. This guide walks through every step.
What the S&P 500 Actually Is
The S&P 500 is an index that tracks the 500 largest publicly traded companies in the United States. Names like Apple, Microsoft, Amazon, Nvidia, Tesla, and Berkshire Hathaway all sit inside it. Together, these companies make up roughly 80% of the total U.S. stock market value.
You cannot buy the S&P 500 itself. The index is just a list. To invest in it, you buy a fund that owns the same 500 stocks in the same proportions. Those funds come in two main flavors: ETFs and index mutual funds.
Pick the Right Account Type First
Before you buy anything, decide where you want the money to live. The account type changes how your returns are taxed.
- Taxable brokerage account: Most flexible. You can withdraw anytime, but you pay tax on dividends and capital gains. Good for goals shorter than 5 years.
- Roth IRA: Contributions are after-tax, but growth and qualified withdrawals are tax-free. The 2026 contribution limit is $7,000, or $8,000 if you are 50 or older.
- Traditional IRA: Contributions may be tax-deductible, but withdrawals in retirement are taxed.
- 401(k): Employer-sponsored, often with a match. The 2026 limit is $23,500 for most workers.
For most beginners with long time horizons, a Roth IRA is the best place to start learning how to invest in the S&P 500. Tax-free growth over 30 to 40 years can be worth tens of thousands of dollars.
Choose an S&P 500 Fund
Not every S&P 500 fund is created equal. They all track the same index, but the expense ratios and minimums vary. Here are four widely used options in 2026.
- VOO (Vanguard S&P 500 ETF): 0.03% expense ratio. No investment minimum beyond the share price.
- IVV (iShares Core S&P 500 ETF): 0.03% expense ratio. Highly liquid.
- SPY (SPDR S&P 500 ETF): 0.0945% expense ratio. The oldest and most-traded S&P 500 ETF.
- FXAIX (Fidelity 500 Index Fund): 0.015% expense ratio. Mutual fund, available at Fidelity with no minimum.
For a buy-and-hold investor, the lowest-cost options are VOO, IVV, or FXAIX. A 0.06% difference in expense ratio sounds small, but over 30 years on a six-figure balance it adds up to thousands of dollars.
Open a Brokerage Account
Once you know the account type and the fund you want, opening a brokerage account takes about 10 minutes. Most major brokers including Fidelity, Schwab, Vanguard, Robinhood, and E-Trade offer commission-free trading on S&P 500 ETFs. To act on this, most beginner investors use a commission-free brokerage like Robinhood, which offers stocks, ETFs, options, and a Roth IRA with no minimums and no commissions, so you can buy VOO or IVV in seconds without a fee.
Robinhood
Robinhood
Robinhood is a trading platform that brings stocks, ETFs, options, futures, prediction markets, crypto, and retirement accounts together in one app.
Standout feature
One platform for stocks, ETFs, options, futures, prediction markets, and crypto
Fees
$0 commission on stocks, ETFs, and options.
Pros
Zero-commission trading on stocks, ETFs, and options
Cons
Best perks (high APY, lower margin rates) require Gold subscription ($5/month)
You will need a few things to sign up: your Social Security number, a U.S. address, a government-issued ID, and your bank account details to fund the account. After approval, you can transfer money in by ACH, usually free of charge. Most transfers settle in 1 to 3 business days.
Place Your First Trade
After the money lands, the actual purchase is fast. Log in, search for the ticker, and place an order.
- Type the ticker (for example, VOO) into the trade screen.
- Choose the number of shares, or enter a dollar amount if your broker supports fractional shares.
- Pick a market order to buy at the current price, or a limit order to buy only if the price hits your target.
- Review and submit. The order usually fills in seconds during market hours.
That is it. You now own a slice of all 500 companies in the S&P 500.
Set Up Automatic Investing
The investors who do best are the ones who keep buying through good markets and bad. The easiest way to make sure that happens is to automate it.
Most brokers let you schedule recurring buys, like $200 into VOO every payday or $500 on the first of each month. This is called dollar-cost averaging, and it removes the guesswork around timing the market. Vanguard, Fidelity, and Schwab all offer this for free. Even smaller amounts like $25 a week add up to over $1,000 a year.
Why Credit Health Belongs in Your Investing Plan
Learning how to invest in the S&P 500 is one half of a strong financial foundation. The other half is credit. A higher credit score means cheaper mortgages, lower auto loan rates, and access to credit cards with better rewards. Each of those savings can be redirected into your investing accounts.
While you are growing your portfolio, products like the Self Visa® Credit Card or Kikoff Secured Credit Card help you build credit at the same time. Both report to all three major bureaus and have low monthly costs that fit beside an investing plan. For ongoing credit monitoring and dispute help, Creditship.ai is worth checking out.
Common Mistakes Beginners Make
A few patterns show up over and over in new investor portfolios. Most of them are avoidable once you know to watch for them.
- Trying to time the market. Studies from Dalbar and Morningstar consistently show that investors who jump in and out earn lower returns than those who hold steady.
- Picking high-fee funds. Some advisors push S&P 500 mutual funds with 0.5% to 1% expense ratios. Stick with low-cost index funds under 0.10%.
- Skipping the Roth IRA. Tax-free growth is one of the biggest legal advantages in the U.S. tax code.
- Selling during downturns. Markets fall 20% or more every 6 to 7 years on average. Investors who sell at the bottom turn a paper loss into a real one.
What to Do After You Start
Once your S&P 500 position is set up and contributions are automated, your job is mostly to leave it alone. Check the account once a quarter, increase contributions when your income grows, and rebalance to your target allocation once a year if needed.
The hardest part of investing in the S&P 500 is not the buying. It is the waiting. The longer your time horizon, the more boring and the more powerful the strategy becomes.
Frequently Asked Questions
How much money do I need to start investing in the S&P 500?
You can start with as little as $1 if your broker offers fractional shares. ETFs like VOO and IVV trade for a few hundred dollars per share, but you can buy a fraction of a share at Fidelity, Schwab, Robinhood, and many others. There is no minimum investment required to open most brokerage accounts.
Is the S&P 500 a safe investment?
The S&P 500 is not risk-free. It has had several drops of 30% or more over its history, including 2008 and 2020. Over long periods of 15 years or more, however, it has historically delivered positive returns. The longer your time horizon, the lower the risk of losing money in nominal terms.
Should I buy VOO, IVV, or SPY?
All three track the S&P 500. VOO and IVV both charge 0.03%, while SPY charges 0.0945%. For long-term buy-and-hold investors, VOO or IVV is the better pick because the lower fee compounds in your favor over decades. SPY is more useful for active traders because of its higher trading volume.
Can I lose all my money in an S&P 500 index fund?
It is extremely unlikely. For an S&P 500 fund to go to zero, all 500 of the largest U.S. companies would have to fail at the same time. The fund can lose value temporarily during recessions, sometimes a lot of value, but it has always recovered given enough time.
