How do I actually buy VOO?

You buy VOO shares through a brokerage account, the same way you'd buy any stock — search for the ticker "VOO," enter how many shares (or, at brokers that support it, how many dollars) you want, and place the order during market hours.

What does VOO cost to hold?

VOO's expense ratio is 0.03% per year, deducted automatically from the fund's returns — you don't pay it separately or notice it as a line-item charge. There's typically no separate commission to buy VOO shares at most modern brokerages.

Who is VOO a good fit for?

VOO tends to suit investors who want broad, diversified exposure to large U.S. companies at low cost, without picking individual stocks, and who are comfortable with the stock market's normal ups and downs over a multi-year horizon. It's not a fit for money you might need in the short term, since its value can drop significantly during downturns.

What is dollar-cost averaging, and does it apply to VOO?

Dollar-cost averaging (DCA) means investing a fixed amount at regular intervals — for example, $500 every month — regardless of the share price at the time. It applies to VOO the same way it applies to any security: you end up buying more shares when the price is lower and fewer when it's higher, which averages your purchase price over time instead of betting on a single entry point.

What Is a VOO Investment?

A plain-English guide to what VOO is, how it works, what it costs, and who it’s built for.

What VOO actually is

VOO is the ticker symbol for the Vanguard S&P 500 ETF, an exchange-traded fund (ETF) managed by The Vanguard Group. A VOO investment means buying shares of this fund, which holds stock in roughly 500 of the largest U.S. companies, weighted to track the S&P 500 index. When you buy one share of VOO, you’re buying a small proportional slice of every company in that index at once, rather than picking individual stocks yourself.

How it works

VOO trades on an exchange throughout the day just like a stock, so its price moves continuously with the market and you can buy or sell any time the market is open. The fund itself owns the underlying stocks and periodically rebalances to match S&P 500 changes. As those companies pay dividends, VOO collects them and distributes them to shareholders quarterly — you can choose to reinvest that dividend automatically (DRIP) or receive it as cash.

What it costs

VOO’s expense ratio is 0.03% per year (verified 2026-09-17) — one of the lowest among broad-market funds. That fee is already deducted from the fund’s reported returns, so it’s not something you pay directly or see as a separate charge. Most brokerages also don’t charge a commission to buy or sell ETF shares, though it’s worth confirming with your specific broker.

Who it suits

VOO is commonly used as a core, long-term holding by investors who want broad diversification and low cost without actively managing individual stock picks. It carries real market risk — its value can decline significantly in a downturn — so it’s generally better suited to money you won’t need for several years than to short-term savings. See our full breakdown in Is VOO a good investment?.

Dollar-cost averaging formula

Dollar-cost averaging (DCA) means investing a fixed dollar amount at regular intervals, regardless of price. Over multiple purchases, your average cost per share is:

Average cost per share = Total amount invested ÷ Total shares purchased

Worked example: say you invest $500 in VOO on the first of each month for three months, at share prices of $500, $400, and $625 respectively:

Month 1: $500 ÷ $500/share = 1.0 shares
Month 2: $500 ÷ $400/share = 1.25 shares
Month 3: $500 ÷ $625/share = 0.8 shares

Total invested: $1,500. Total shares: 3.05. Average cost per share: $1,500 ÷ 3.05 ≈ $491.80 — lower than the simple average of the three prices ($508.33), because DCA automatically buys more shares when the price dips. This example uses round numbers for clarity, not actual VOO prices; see our VOO calculator to project your own monthly-contribution scenario, which uses the same underlying mechanic.

Try the calculators

VOO calculator — project overall growth with contributions and reinvested dividends
Dividend calculator — project VOO’s dividend income specifically
S&P 500 calculator — a more general version, with a Roth IRA scenario
Compare VOO to other funds — see how it stacks up against SPY, VTI, IVV, SCHD, and more

Frequently asked questions

A VOO investment means buying shares of the Vanguard S&P 500 ETF, which gives you proportional ownership in roughly 500 of the largest publicly traded U.S. companies through a single, low-cost fund.

This calculator provides hypothetical estimates for educational purposes only and is not financial, tax, or investment advice. Past performance does not guarantee future results. voocalculator.app is not affiliated with, endorsed by, or sponsored by The Vanguard Group. VOO is a trademark of its respective owner. See our full disclaimer.