VOO vs VTI: Which Vanguard ETF Should You Choose?

Same fee, same philosophy — but they own different slices of the market. Here is what actually differs.

VOO tracks the S&P 500 (about 520 large-cap stocks); VTI tracks the CRSP US Total Market Index (3,500+ stocks across all caps). Both charge the same 0.03% expense ratio, so fees will not decide this one — the real difference is market coverage and diversification.

At a glance

	VOO	VTI
Fund name	Vanguard S&P 500 ETF	Vanguard Total Stock Market ETF
Index tracked	S&P 500	CRSP US Total Market
Expense ratio	0.03%	0.03%
Inception	Sep 2010	May 2001
Holdings	≈520 large-cap stocks	≈3,500+ stocks (all cap)
Dividends	Quarterly	Quarterly
Coverage	Large-cap U.S.	Nearly the entire U.S. market

Both charge just 0.03% per year — among the lowest in the industry — so if you are choosing between these two, fee drag is a non-issue. The 20-year projection below shows why.

The fee math: nearly identical

With identical expense ratios, the fee gap over 20 years is effectively zero. Run your own numbers with the ETF Fee Impact Calculator, pre-filled with these two funds:

Open the fee calculator with VOO vs VTI →

Year	Contributions	Estimated Growth	Total Value
5	$40,000	$9,973	$49,973
10	$70,000	$36,639	$106,639
20	$130,000	$170,851	$300,851

This example assumes a 7% hypothetical annual return with monthly compounding, $10,000 to start and $500/month, no taxes or trading costs. The 20-year figure matches the default output of the Compound Interest Calculator. Because both funds have identical fees, this table illustrates compounding for either fund — the practical difference comes from what they own, not these numbers.

The real difference: market coverage

VOO holds the roughly 520 largest U.S. companies. VTI holds more than 3,500 companies across the whole market, adding mid- and small-cap exposure that VOO never touches. Because large caps dominate the U.S. market's value, the two funds are highly correlated — but they are not identical investments.

In periods when large-cap tech leads, VOO can look better. In periods when smaller companies catch up, VTI can look better. Over a 20–30 year horizon, consistently holding either is far more important than switching between them — how you buy matters too.

Which should you choose?

Choose VOO if you want simple, concentrated exposure to the largest U.S. companies and are comfortable with a large-cap tilt.
Choose VTI if you want nearly the entire U.S. market in one fund, including thousands of smaller companies.
Owning both is usually unnecessary — VOO's holdings are almost entirely inside VTI, so the two overlap more than they diversify.

Risk & limitations

Past performance does not guarantee future results; 7% is a hypothetical assumption, not a forecast.
The two funds are highly correlated because large caps dominate the U.S. market — diversification differences are real but modest day to day.
Taxes (capital gains, qualified dividends) can affect after-tax results and are excluded here.
This is educational information, not personalized investment advice. An appropriate allocation depends on your time horizon, risk tolerance and goals.

Sources: Fund data (holdings, fees, returns) is from the funds' issuers (Vanguard) as published; verify current figures with the issuer. Educational content only.

Frequently asked questions

What's the difference between VOO and VTI?

VOO tracks the S&P 500's ≈500 large-cap stocks; VTI tracks the CRSP US Total Market Index's ≈3,500+ stocks, adding mid- and small-cap exposure. Both charge 0.03%.

Is VOO or VTI better for long-term investing?

Historically their long-term returns are similar, since large caps dominate the market. VTI is more diversified; VOO is simpler and purely large-cap. "Better" depends on whether you want total-market coverage or concentrated large-cap exposure.

Should I own both VOO and VTI?

Not necessarily — VOO's holdings are almost entirely inside VTI, so owning both adds overlap rather than true diversification. Most investors choose one core U.S. equity fund.

Do VOO and VTI pay dividends?

Yes, both pay quarterly dividends. Yields are broadly similar (VOO around 1.0–1.2% and VTI in a similar range, as of 2026) and both can qualify for favorable dividend tax treatment for U.S. investors.