SPY vs VOO: Which S&P 500 ETF to Buy?

Both funds track the same index. Both hold the same companies in the same weights. So the usual advice, that they are basically identical and you should pick either, is not wrong. It is just incomplete.

The SPY vs VOO gap is real, it is measurable in the funds’ own published returns, and it is wider than the fee difference alone explains. DollarVisor pulled both fact sheets, lined up the same reporting date, and did the arithmetic below. Companies cannot pay for placement in our rankings.

Here is a short overview before the numbers.

1. Which One Should You Buy?

Quick Answer: Our pick is VOO for anyone buying and holding. It costs a third of what SPY costs and has quietly out-returned it over one, three, five and ten years. SPY is the better tool only for options traders and large short-term positions. Neither belongs in your emergency fund: that money goes into cash accounts instead.

The decision splits cleanly by what you are actually doing with the money.

• Buying monthly and holding for decades. VOO. The cost gap compounds, and the ten-year record shows it already has.
• Running options: covered calls, protective puts, spreads. SPY. Its options market is the deepest of any fund on earth, and that is not close.
• Parking a large sum for a few weeks. SPY. Over that horizon the fee is noise and the tighter market matters more.
• Already holding SPY in a taxable account. Probably stay put. Section 9 explains why selling can cost more than the fee ever will.

2. SPY vs VOO Side by Side

Quick Answer: SPY charges 0.0945% and holds $821 billion. VOO charges 0.03% and holds $979 billion in its ETF share class. SPY launched in 1993 as a unit investment trust; VOO launched in 2010 as a normal open-end fund. Same index, two different legal wrappers: a distinction that matters as much as the brokerage you hold them at.

Note the asset line. VOO’s total fund, counting its mutual fund share classes, holds $1.675 trillion: roughly double SPY.

3. What Is Structurally Different Between SPY and VOO?

Quick Answer: SPY is a unit investment trust, a 1993-era wrapper with no manager and strict rules. VOO is an ordinary open-end fund. The trust cannot put incoming dividends back to work before its quarterly payout, so cash builds up inside it. VOO stays fully invested, which is why its long-run compounding runs slightly ahead.

State Street states plainly that shares of SPY “represent ownership in the State Street SPDR S&P 500 ETF Trust, a unit investment trust.” That is not marketing language. It is a specific legal form with three practical consequences.

• No internal reinvestment. Dividends arriving from Apple, Microsoft and the other 502 companies sit as cash inside the trust until the quarterly payment date. They cannot be pushed back into stocks in the meantime.
• No securities lending. A trust of this type does not lend out its holdings for extra income, a small revenue stream that open-end funds can use to offset costs.
• No manager discretion. The trust holds what the index holds, which removes every small lever a fund can pull to close a gap.

Vanguard describes VOO the opposite way in its own fact sheet: the fund “remains fully invested,” with a 2.4% turnover rate.

One fund is allowed to hold cash. The other is designed never to. Over thirty years, that design choice shows up in the balance.

4. What Does the SPY vs VOO Fee Gap Actually Cost?

Quick Answer: The gap is 0.0645% a year, or $64.50 on a $100,000 position. That sounds trivial and is, for one year. Held thirty years at an 8% return, the same $100,000 ends up about $17,730 richer in VOO: money that would otherwise have compounded, much like the yield gap between cash accounts.

Fee comparisons usually stop at the annual number, which is exactly why the difference feels ignorable. The number that decides anything is the ending balance.

A $100,000 position left alone for thirty years grows to roughly $997,900 in VOO and $980,200 in SPY. Same stocks, same market, $17,730 apart.

5. SPY vs VOO Returns: Which Tracked the Index Better?

Quick Answer: VOO won every published period. Over ten years to June 30, 2026, VOO returned 15.47% a year and SPY 15.35%, against 15.51% for the index itself. VOO trailed its benchmark by 0.04 points a year; SPY trailed by 0.16. This is one of the few comparisons on our comparison desk where the loser never wins a single period.

Both sponsors report to the same quarter end, so the periods line up exactly. No cherry-picking required.

Five periods, five wins for VOO, and the margin is remarkably steady at 0.10 to 0.13 points a year.

6. Why Does SPY Trail by More Than Its Fee?

Quick Answer: The fee explains 0.0645 points of the 0.12-point ten-year gap. The rest is cash drag. State Street’s own 2026 calendar shows SPY going ex-dividend on March 20 but not paying until April 30: 41 days when that money sits idle instead of compounding with the market.

This is the part almost no comparison does the arithmetic on. Subtract the fee difference from the return difference and roughly half the gap is left over, unexplained by cost.

The SPDR dividend distribution schedule for 2026 shows the pattern across all four quarters:

• Q1: 41 days. Ex-date March 20, paid April 30.
• Q2: 43 days. Ex-date June 18, paid July 31.
• Q3: 42 days. Ex-date September 18, paid October 30.
• Q4: 42 days. Ex-date December 18, paid January 29, 2027.

Compare that with SPYM, State Street’s own low-cost S&P 500 fund, which is not a trust. Its March 2026 distribution goes ex on the 13th and pays on the 17th: four days. Same sponsor, same index, one-tenth the wait.

SPY was also carrying $835.5 million of net cash on August 13, 2026. In a rising market, cash that is not invested is a return you do not earn.

7. What Your Dividends Cost in State Tax

Quick Answer: Both funds pay roughly 0.97% a year in dividends, about $970 on a $100,000 position. In California that costs $90 in state tax; in Texas and Florida it costs nothing. Your state bill can exceed the entire SPY-versus-VOO fee gap, which is why the account matters as much as the institution holding it.

Fund comparisons almost always stop at the federal level. But the same $970 of dividends is taxed differently in ten different states, and the spread is wider than the thing everyone argues about.

Two caveats. Most states tax qualified dividends as ordinary income, not at the lower federal capital gains rate the IRS sets out in Topic 404. And none of this applies inside an IRA or 401(k), where dividends go untaxed until you withdraw.

8. When Is SPY Still the Right Choice?

Quick Answer: SPY wins when your holding period is measured in days and your position is large. Its options market is the deepest in the world and its 30-day median bid-ask spread rounds to 0.00%. If you write covered calls or need to exit $2 million in an afternoon, the fee is irrelevant: much like an annual fee you earn back in benefits.

The case for SPY is genuinely strong in a narrow set of situations, and the usual “just buy VOO” advice glosses over it.

• Options strategies of any kind. SPY’s contracts carry far more open interest and tighter quotes than VOO’s, and that is worth more than 0.0645% a year.
• Institutional-size trades. Moving eight figures, the cost of crossing the spread dwarfs the annual fee.
• Short holding periods. Hold two weeks and SPY’s extra fee costs about $2.50 per $100,000.
• Plans your platform limits. Some accounts offer one and not the other. Own what you can actually buy.

9. Should You Switch From SPY to VOO?

Quick Answer: Switch freely inside an IRA or 401(k), where selling triggers no tax. In a taxable account, do the math first: capital gains tax on a large embedded gain can cost more than three decades of the fee difference. Check what your broker charges to trade before you place the order.

The switch decision turns entirely on which account the shares are sitting in.

1. Check the account type. Retirement account means no tax on the sale. Taxable brokerage account means you owe tax on the gain.
2. Pull your cost basis. Your broker lists it per lot. A $100,000 position bought for $40,000 carries a $60,000 gain.
3. Estimate the bill. At a 15% federal long-term rate, that $60,000 gain costs $9,000, plus state tax. Thirty years of the fee gap on $100,000 is $17,730.
4. Compare, then decide. If the tax bill is close to or above the fee saving, keep SPY and buy VOO with new money instead.
5. Redirect contributions either way. Every future dollar can go to VOO regardless of what you do with the existing shares.

Step five is the one most people miss. You do not have to choose between switching and doing nothing.

10. The Verdict

Quick Answer: VOO wins the SPY vs VOO matchup for long-term investors on cost, structure and ten years of published returns. SPY wins for options and short-horizon trades. If you are still building the account these will live in, start with our investing and banking hub.

The evidence points one way for the buy-and-hold investor, and it is not a close call on the parts that repeat every year.

VOO costs 0.03% against 0.0945%. It stays fully invested where SPY’s trust structure parks dividends in cash for about six weeks a quarter. It beat SPY over one, three, five and ten years, by a steady 0.10 to 0.13 points a year. On $100,000 held thirty years, that difference is roughly $17,730 in fees alone, before the cash-drag effect.

SPY earns its place in a different job. It is the most liquid equity instrument in the world and the only sensible choice for an options overlay. Nobody writing covered calls should switch to save a rounding error.

And if the shares already sit in a taxable account with a big gain, the tax bill can wipe out the saving entirely. Point new money at VOO and leave the old shares alone.

This article is for information only and is not financial advice. Fund fees, yields and tax rules change; confirm current figures with each sponsor and your tax advisor before you invest. See our disclaimer.

11. Frequently Asked Questions

1. Is VOO better than SPY?

For long-term investors, yes. VOO charges 0.03% against SPY’s 0.0945% and returned more over every period both sponsors publish, including 15.47% a year over ten years versus 15.35% for SPY. SPY remains better for options traders and very short holding periods, where liquidity matters more than cost.

2. What is the difference between SPY and VOO?

They hold the same S&P 500 companies but use different legal wrappers. SPY is a unit investment trust from 1993 that cannot reinvest dividends before its quarterly payout. VOO is an ordinary open-end fund that stays fully invested. That structural difference, plus the fee gap, explains why VOO tracks the index more closely.

3. Do SPY and VOO hold exactly the same stocks?

Almost. Both use full replication of the S&P 500. State Street reports 504 holdings for SPY and Vanguard reports 506 for VOO, small differences caused by share classes and timing around index changes. The sector weights and top ten holdings are effectively identical.

4. Which pays a higher dividend, SPY or VOO?

Both pay quarterly and yield roughly the same, since they own the same companies. SPY reported a 0.97% distribution yield in August 2026. The real difference is timing: SPY waits about 41 to 43 days between the ex-dividend date and payment, while an open-end fund like VOO turns cash around much faster.

5. Can I own both SPY and VOO?

You can, but there is little reason to. They track the same index, so holding both adds no diversification and doubles your record-keeping. The one exception is a taxable account where selling SPY would trigger a large capital gains bill; in that case, keep SPY and direct new contributions to VOO.