VOO vs. VTI is one of the most common investing debates — and for good reason. Both are Vanguard ETFs with a 0.03% expense ratio. Both are low-cost, tax-efficient, and widely available. The difference comes down to which index each tracks:
- VOO — Vanguard S&P 500 ETF — tracks the 500 largest US companies
- VTI — Vanguard Total Stock Market ETF — tracks the entire US stock market (3,500+ companies)
For most investors, the choice will have minimal impact on long-run returns. But understanding the differences helps you pick the ETF that fits your investing philosophy.
Quick Comparison: VOO vs. VTI
| Feature | VOO | VTI |
|---|---|---|
| Index tracked | S&P 500 | CRSP US Total Market Index |
| Number of holdings | ~503 | ~3,600+ |
| Expense ratio | 0.03% | 0.03% |
| Coverage | Large-cap US | Large, mid, small-cap US |
| Dividend yield | ~1.3%–1.8% | ~1.3%–1.7% |
| Inception date | September 2010 | May 2001 |
| Exchange | NYSE Arca | NYSE Arca |
The Core Difference: S&P 500 vs. Total Market
VOO (S&P 500)
VOO tracks the S&P 500 Index — a committee-selected index of 500 large US companies. Companies must meet minimum market-cap, profitability, and liquidity standards to be included. The index is cap-weighted, meaning Apple, Microsoft, and Nvidia have more influence than smaller companies.
About 80–85% of the total US stock market by capitalisation is captured in the S&P 500.
VTI (Total Stock Market)
VTI tracks the CRSP US Total Market Index — essentially every publicly traded US company, from mega-caps like Apple to micro-caps. This adds roughly 3,000+ small and mid-cap companies that don’t appear in VOO.
The extra stocks represent about 15–20% of US market capitalisation — so VTI is meaningfully more diversified, even though the additional weight of those smaller stocks is small in dollar terms.
Performance: VOO vs. VTI Over Time
Because VOO makes up ~80% of VTI’s portfolio, their long-run returns are nearly identical:
| Period | VOO annualised return | VTI annualised return |
|---|---|---|
| 5-year (2021–2025) | ~14–16% | ~14–16% |
| 10-year (2016–2025) | ~12–14% | ~12–14% |
| Since VTI inception (2001–2025) | N/A (VOO started 2010) | ~9–11% |
In years when small-cap stocks outperform large-caps, VTI edges out VOO slightly. In years when mega-cap tech dominates (as in much of 2020–2024), VOO may edge out VTI slightly. Over the long run, the difference has been less than 0.5% per year.
Worked Example
Imagine two investors each contribute $500/month for 30 years, assuming 7% annualised return:
- VOO investor: ~$607,000 at year 30
- VTI investor: ~$607,000 at year 30 (essentially the same)
The ETF choice matters far less than consistency of contributions and time in the market.
Which Is More Tax-Efficient?
Both VOO and VTI are highly tax-efficient due to the ETF structure. They rarely distribute capital gains. In a taxable account, you’ll primarily pay taxes on:
- Qualified dividends (taxed at 0%, 15%, or 20%)
- Capital gains when you sell
Both are equally tax-efficient. In a Roth IRA, this is irrelevant — growth and withdrawals are tax-free.
VOO vs. VTI: When Each Makes More Sense
Choose VOO if:
- You want pure S&P 500 exposure, matching the benchmark most commonly discussed in financial news
- You’re combining with an international ETF (e.g., VXUS) and want a clean large-cap/international split
- You’re comparing performance to the S&P 500 index
Choose VTI if:
- You want the broadest single-fund coverage of US equities
- You believe small- and mid-cap stocks may outperform over your investment horizon
- You want the simplest “one US equity fund” approach
VOO and VTI vs. Competitors
| ETF | Issuer | What it tracks | Expense ratio |
|---|---|---|---|
| VOO | Vanguard | S&P 500 | 0.03% |
| VTI | Vanguard | US Total Market | 0.03% |
| IVV | iShares | S&P 500 | 0.03% |
| SPY | State Street | S&P 500 | 0.0945% |
| ITOT | iShares | US Total Market | 0.03% |
| SCHB | Schwab | US Broad Market | 0.03% |
ITOT and SCHB are VTI equivalents from iShares and Schwab respectively, at the same cost.
Can You Own Both VOO and VTI?
Technically yes, but there is minimal benefit. VOO’s holdings are a subset of VTI. Owning both primarily increases your large-cap weighting — it doesn’t add meaningful diversification. Most experts recommend choosing one and investing consistently.
If you want genuine diversification beyond US large-caps, consider adding:
- VXUS (Vanguard Total International) for non-US exposure
- BND (Vanguard Total Bond Market) for fixed-income
Internal Links
- VOO ETF 2026 Review
- Best Vanguard funds for retirement
- Vanguard vs. Fidelity: which broker is better?
- FXAIX vs. VOO: S&P 500 showdown
- How to open a Vanguard account
- Vanguard Digital Advisor review
Bottom Line
VOO and VTI are both outstanding low-cost index ETFs. The difference in long-run performance is minimal — your choice between them is unlikely to meaningfully change your financial outcomes. If you want pure S&P 500 tracking, choose VOO. If you want the broadest US equity coverage, choose VTI. Both are better choices than most actively managed funds charging 10–50× more in fees.
This article is for educational purposes only and does not constitute personalised investment advice. All investments carry risk, including the possible loss of principal.
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