VOO vs VTI: Which Should You Actually Buy? (Honest 2026 Comparison)

Short answer: VOO vs VTI is one of the most over-googled questions in retail investing, because the honest answer is anticlimactic. Both Vanguard ETFs charge the same 0.03% expense ratio¹. Both have the same top ten holdings in roughly the same order. They have moved together for over 99% of trading days since VOO launched in 2010. Over the last ten years their annualised total returns have differed by about 0.5 percentage points per year². For most retail investors the right answer is: pick one, hold it for thirty years, do not own both. If you want the textbook Buffett answer, pick VOO — the S&P 500 fund his will specifically directs his wife's trust to buy³. If you want a tiny bit more diversification into small and mid caps, pick VTI. Both are correct.

If you have been agonising over VOO vs VTI for weeks, this guide is the permission to stop. They are two of the cheapest, broadest, best-built ETFs ever sold to retail investors. The differences are so small that the time you spend choosing between them costs more (in compounding-while-undecided) than picking either one. The point of this guide is to give you the side-by-side numbers, the three real differences, and a verdict you can act on today.

VOO vs VTI at a glance — the cheat sheet

Everything that matters in one table. Numbers are as of mid-2026²¹.

Metric	VOO	VTI	Verdict
Tracks	S&P 500	CRSP US Total Market	Different index, similar exposure
Holdings	504	3,512	VTI more diversified by count
Expense ratio	0.03%	0.03%	Tie
Assets under management	~$998B	~$662B	VOO is the biggest ETF in the world
1-year total return	28.77%	29.07%	VTI by 30 bps
5-year annualised return	14.01%	12.79%	VOO by ~120 bps
10-year annualised return	15.53%	15.02%	VOO by ~50 bps
Dividend yield	1.03%	1.01%	Effectively tied
Top holding	NVIDIA (7.84%)	NVIDIA (6.64%)	Same name, different weight
Average forward P/E	~28	~26	VTI slightly cheaper
Buffett's stated will instruction	Yes	No	Tiebreaker

If you read that table and concluded they are basically the same fund, you are correct. The rest of this guide explains why they are basically the same, the three places they differ in ways that might matter to you, and how to pick.

What VOO and VTI actually are

A two-line explainer for each, because the rest of the article assumes you understand the construction.

VOO is the Vanguard S&P 500 ETF. It buys all 500-ish stocks in the S&P 500 in proportion to their market value. The S&P 500 is a US large-cap index maintained by S&P Dow Jones Indices — a committee that selects companies based on market value, profitability, and trading liquidity. Companies are added and removed regularly (NVIDIA was added in 2001; Sears was removed in 2018). VOO simply mirrors whatever the committee says is in the index.

VTI is the Vanguard Total Stock Market ETF. It tracks a different index — the CRSP US Total Market Index, which aims to hold every investable US public stock. As of late 2025 that was 3,512 stocks², ranging from $5 trillion mega-caps down to micro-caps worth a few hundred million. VTI weights each one by its market value, so even though it owns 7× more stocks than VOO, the largest 500 of those stocks (the same 500 in the S&P 500, give or take) make up about 87% of VTI's portfolio.

That last sentence is why VOO vs VTI is mostly a cosmetic choice. Roughly 87 cents of every dollar in VTI is in the same companies as VOO, in nearly the same weights. The remaining 13 cents is spread across thousands of small and mid caps.

The 7 ways VOO and VTI are essentially identical

For 95% of the trading day, you would not notice you owned a different one.

1. Same fund family. Both are run by Vanguard, the world's largest asset manager by AUM. Same operations, same custody, same legal structure (open-ended ETF).
2. Same expense ratio (0.03%). Three cents per year for every $100 invested¹. As low as US equity index investing gets.
3. Same top 10 holdings, in the same order. NVDA, AAPL, MSFT, AMZN, GOOGL, AVGO, GOOG, META, TSLA, BRK.B — both funds, same list, same rank².
4. Same dividend yield (~1%). Within 2 basis points of each other on trailing 12 months.
5. Same tax structure. Both qualify for long-term capital gains treatment when held more than a year; both distribute dividends mostly as qualified dividends.
6. Same liquidity profile. Both are among the most-traded ETFs in the world. Bid-ask spreads are typically a single cent on a price of several hundred dollars — effectively zero.
7. Same long-term correlation. Both have moved together for over 99% of trading days since 2010. The single biggest divergence in any one year has been under 200 basis points.

If two funds are the same on all seven of those dimensions, the natural question is what is different at all. Three things, only.

The 3 ways VOO and VTI actually differ

Difference 1 — small-cap exposure

VOO holds zero small-cap and zero mid-cap stocks. The S&P 500 is by definition large-cap. VTI holds them all — about 13% of the portfolio sits below the S&P 500 cutoff. In years when small caps outperform large caps (often after recessions, or in early-cycle environments), VTI's extra 13% boosts returns by ~50–150 basis points. In years when large caps outperform (most of the last fifteen years, as mega-cap tech has dominated), VOO comes out ahead by a similar amount.

Over the very long run — 30+ years — academic research suggests small caps modestly outperform large caps with higher volatility. The Fama-French research that established this is the empirical foundation of the small-cap-premium thesis. The "Vanguard total market" bet, including VTI, is implicitly a bet that this premium persists.

Difference 2 — index methodology and turnover

The S&P 500 is curated by a human committee. Index additions and deletions happen because a committee decides a company qualifies (or no longer does). NVIDIA's addition in 2001, Tesla's addition in 2020, the recent inclusion of Palantir, Axon, and Block — all committee decisions.

The CRSP US Total Market Index that VTI tracks is rules-based and effectively passive: a company is in the index because it is a US-listed common stock with sufficient liquidity. There is no curation, no "quality" hurdle, no committee discretion. This means VTI's index turnover is lower than VOO's — it does not need to react to committee changes — but VTI also holds companies that are too small to be in the S&P 500.

For most retail investors this difference is invisible. For tax-sensitive investors in taxable accounts, the slight reduction in turnover at VTI can produce marginally better tax efficiency. The effect is small (a few basis points per year).

Difference 3 — what Buffett specifically said

This one matters more than it might look. In his 2013 annual letter Buffett spelled out the instructions for his wife's trust: "Put 10% of the cash in short-term government bonds and 90% in a very low-cost S&P 500 index fund. (I suggest Vanguard's)"³. The S&P 500. Not the total market. Not VTI.

Buffett has been asked about VTI explicitly in shareholder meetings. He has answered, paraphrased: he has nothing against the total market, but the S&P 500 is what he has actually instructed. When the most public-track-record value investor of the last century specifically picks one over the other for his own family, that is a tiebreaker most retail investors should weight.

It does not mean VTI is wrong. It means VOO is what Buffett's framework points to.

The verdict on VOO vs VTI for retail investors

Three clean cases.

If you cannot decide and want the answer Buffett gave his own family — pick VOO. This is the default. Done. Set up automatic contributions and stop looking at the price.

If you specifically want broader exposure (including small caps) — pick VTI. You will get slightly more diversification at zero additional cost. Over a 30-year horizon the difference is likely small but in your favour if the small-cap premium holds.

If you cannot pick either — pick the one your brokerage app makes easier to buy. Robinhood, Fidelity, and Schwab all support fractional shares of both⁴. The cost of "picking the wrong one" is so small that the cost of not picking (waiting on the sidelines) is almost certainly larger.

Do not own both. Owning VOO and VTI together is owning the S&P 500 twice with a small-cap rounding error layered on top. It looks like diversification on the surface. It is not. You add complexity, you cannot rebalance meaningfully, and the real diversification (international, fixed income, real estate) you might actually want gets pushed off the agenda.

Common follow-up questions on VOO vs VTI

A few we get often.

Should I switch from one to the other in a taxable account? Probably not. Switching triggers a taxable event — you realise gains and owe tax on them, which is real money out of your pocket today for a portfolio difference that may be 30–50 bps per year. The arithmetic almost never works. Switch only if you are inside a tax-advantaged account (IRA, 401k, Roth), where there is no tax cost.

Is VOO or VTI better for long-term retirement? Either. The 30-year compounding outcomes will be within a few percent of each other. The amount you invest each month, the number of years you stay invested, and whether you keep buying through downturns matter 100× more than the choice between these two specific ETFs.

What about SPY? SPY (the SPDR S&P 500 ETF Trust from State Street) is the original S&P 500 ETF, launched in 1993. It tracks the same index as VOO. But SPY's expense ratio is 0.0945% — about 3× VOO's. Over 30 years of compounding, the SPY-vs-VOO fee gap compounds to a meaningful difference. For long-term holders, VOO is the right S&P 500 ETF. SPY is structured for institutional traders who care more about intraday liquidity (it is the most-traded ETF in the world) than expense ratio.

Should I add SCHD (or VYM) for dividend income? That is a different decision and arguably a useful one. SCHD overlaps heavily with VOO/VTI but tilts toward higher-yield, financially-healthy dividend payers. See our dedicated SCHD honest read for the full breakdown — methodology, the March 2026 reconstitution, the persistent 1% outperformance vs VYM, and where SCHD fits in a real portfolio. Adding SCHD to a VOO or VTI core is a legitimate quality-tilt; adding both VOO and VTI is not.

What if I want international exposure? Use a separate ETF (VXUS for total international, VEA for developed-markets, VWO for emerging-markets). Neither VOO nor VTI gives you exposure outside the US.

When VOO vs VTI does not matter — and what matters more

The honest closing thought.

The argument between VOO and VTI is what investing communities call a "rounding error" decision. Yes, one will outperform the other in any given year, sometimes by a meaningful amount. But over the realistic 20–40 year holding period of a serious retirement portfolio, the choice between them is dwarfed by:

• Whether you are actually investing every month. A retail investor who picks VTI but only invests in years they "feel good" about the market will end up far behind one who picks VOO and contributes automatically through good years and bad.
• Whether you can stay invested through a 30% drawdown. Both VOO and VTI will fall around 30% from peak about once every six to seven years. Selling at the bottom is the single most expensive habit in retail investing — and it does not matter which fund you panic-sold out of.
• Whether you are using a tax-advantaged account. Putting your VOO or VTI inside an IRA, Roth IRA, or 401k saves you potentially tens of thousands of dollars in tax over a working life. The tax wrapper matters more than the ETF.
• Whether you keep your expenses low. A 0.03% ETF is fine. A 1% mutual fund or financial-advisor wrapper that holds the same index is not. Every basis point of fee you pay compounds backwards over decades.

The choice of VOO vs VTI ranks far below all four of those decisions. Pick one. Move on. Compound.

Related reading

For the broader beginner framework that VOO or VTI sits inside, see best stocks for beginners with little money — three specific ETFs plus Berkshire, exactly what Buffett directed his own wife's trust to buy. For the underlying valuation discipline that explains why low-cost index investing usually beats stock picking for most people, see margin of safety formula and DCF valuation. For the framework you can use once you are ready to add individual stocks beyond the ETF core, see how to know if a stock is a good buy and the 7-step research workflow. For an example of Buffett applying that same value-investing arithmetic to a position he is exiting, see why Warren Buffett sells bank stocks. For the opposite of VOO's boring 1% yield — the engineered 269% headline yield ETF that lost holders 56% of their principal over the past year — see MSTY dividend history. To run the actual historical compounding math on VOO vs any individual stock side-by-side — with dividend reinvestment, the SPY benchmark, and honest drawdown framing — use our stock return calculator. For the dedicated head-to-head tool that compares VOO and VTI (or any two tickers) on yield, safety, growth, leverage, and 5-year total return — with a winner highlighted per metric — see our stock comparison tool.

For more long-form essays on plain-English investing, see the rest of the Hub.