VOO Calculator

VOO vs. IVV

Two near-identical S&P 500 funds from two different issuers — what actually distinguishes them?

At a glance

TickerFundIssuerIndex trackedExpense ratio
VOOVanguard S&P 500 ETFVanguardS&P 5000.03%
IVViShares Core S&P 500 ETFBlackRock (iShares)S&P 5000.03%

Data last verified: 2026-09-17

Same index, same low cost, different issuer

IVV tracks the identical s&p 500 index as voo, from a different fund issuer. Unlike the VOO-vs-SPY comparison, there’s no meaningful structural or cost difference here — both are modern, open-end ETFs with historically similar expense ratios tracking the exact same index.

Project growth: VOO vs. IVV

Because both funds track the identical index at a near-identical cost, the same return assumption applied to both should produce nearly the same result — use this to confirm just how small the practical difference is.

Expense ratio 0.03% deducted automatically.

Expense ratio 0.03% deducted automatically.

Hypothetical scenario, not a prediction. Past performance does not guarantee future results. Dividends are not modeled here; this isolates price growth and cost drag.

VOO after 20 years

$427,617

IVV after 20 years

$427,617

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Which should you choose?

This is one of the few comparisons where the honest answer is: it mostly doesn’t matter. Pick whichever is commission-free at your broker, or whichever fund family you already prefer to consolidate around. One thing NOT to do: don’t treat VOO and IVV as a tax-loss harvesting pair. Because they track the identical index, swapping one for the other after selling at a loss risks the IRS treating them as “substantially identical” securities, which would disallow the loss under the wash-sale rule. A genuine harvesting partner needs to track a meaningfully different index.

Project your investment with the VOO calculator — the results are a close approximation for IVV as well, given the identical underlying index.

More comparisons

  • VOO vs. SPY — same index, but a real cost and structure difference
  • VOO vs. VTI — large-cap only vs. the total U.S. stock market

Frequently asked questions

Functionally, yes. Both track the S&P 500 index, and both have historically carried very low, closely matched expense ratios. The main difference is the issuer — Vanguard for VOO, BlackRock's iShares brand for IVV — which mostly matters for brand preference and brokerage-specific commission-free lists rather than expected returns.

This calculator provides hypothetical estimates for educational purposes only and is not financial, tax, or investment advice. Past performance does not guarantee future results. voocalculator.app is not affiliated with, endorsed by, or sponsored by The Vanguard Group. VOO is a trademark of its respective owner. See our full disclaimer.