FXAIX vs. VOO Calculator

Neither is better for everyone. Their returns have been nearly identical, 15.0% and 14.9% a year over 10 years, so small differences like fees and how easily you can buy each may decide it. Consider what you already own, how long you'll stay invested and how you'd handle a large drop. Nothing here is investment advice.

Over the last 10 years, FXAIX returned 15.0% a year and VOO returned 14.9% a year, with dividends reinvested. That's a total return of 302.9% for FXAIX and 301.9% for VOO. The table above shows other periods, and the calculator runs any dates you choose.

Invested 15 years ago, $10,000 would be worth about $78,641 in FXAIX and $78,914 in VOO, as of November 2026. Over 10 years, it's $40,291 and $40,193. These assume dividends were reinvested, and leave out taxes and fees.

By how much each swung, they've been about equally risky: about 14.1% a year against 14.1%. VOO has had the deeper fall, 23.9% from its high, measured at month ends. Higher swings mean a wider range of outcomes, so the dates you buy and sell matter more.

Both had their worst full calendar year in 2022. FXAIX returned -18.1% and VOO returned -18.2%. Bad years tend to arrive together for investments that move almost in lockstep.

FXAIX came out ahead in 8 of 14 full calendar years, or 57% of the time, and VOO in the rest. So far in 2026, through November 2026, FXAIX is up 11.2% and VOO is up 11.2%. Leadership often changes from year to year, which is hard to predict ahead of time.

It depends on how much they overlap. Their monthly returns have a correlation of 1.00, where 1 means they move exactly together. At that level, owning both is close to owning more of one, so it adds little spread. Check what each holds before splitting your money.

Over the last 10 years, $100 at each month end would have cost $12,000 and be worth about $26,466 in FXAIX and $26,442 in VOO, with dividends reinvested. Monthly buying spreads your entry prices, so the result depends less on one lucky or unlucky start date. Use the Buying option above to test it.

They're a mutual fund and a ETF. Fidelity 500 Index Fund trades as FXAIX, and Vanguard S&P 500 ETF trades as VOO. Their returns track each other closely, so they likely hold many of the same companies. Read each one's prospectus or annual report for fees and holdings, which we don't cover here.

Yes. We use prices adjusted for splits and dividends, which assumes every dividend was reinvested. That matters most when one pays out more than the other, because a plain price chart would understate its return. Our figures leave out brokerage fees and the tax you'd owe on dividends in a regular account.

In a taxable US account, you owe capital gains tax when you sell at a profit, at long-term rates of 0%, 15% or 20% if you held for more than a year. Dividends are usually taxed in the year you receive them. In a Roth IRA or 401(k), different rules apply. Check IRS guidance or ask a tax professional about your situation.