S&P 500 ETFs Compared: VOO vs IVV vs SPLG

Stocks & ETFs · June 13, 2026

Three of the largest S&P 500 index funds each hold roughly 500 stocks and charge about 0.03 percent a year, so a $20,000 position costs near $6 annually in fees. Yet differences in tracking precision, minimum share price, and fund provider can shift your outcome by a few dollars to a few hundred over a decade. Choosing poorly won't sink the plan, but the gaps are real.

All three track the same benchmark, so the real question is which wrapper fits your account and your habits.

The expense ratio gap has nearly vanished

A decade ago the cheap funds charged roughly 0.10 to 0.20 percent while pricier clones took 0.50 percent or more. Today the three front-runners sit within a hair of each other, often between 0.03 and 0.04 percent. At that level the fee is nearly a rounding error on a modest balance. The smarter move is to compare what you actually keep after costs, not the sticker rate. Compare a fund at 0.03 percent to one at 0.09 percent on a $50,000 stake: the difference runs about $30 a year, which compounds to a few hundred dollars across 20 years rather than thousands.

Share price changes how you reinvest

One fund trades near $500 a share while another sits closer to $60, and a third hovers under $30. If you add $200 a month, the cheaper share lets you buy whole units more often and avoid leaving a few dollars idle in cash. The expensive share forces fractional buying, which most modern brokers now handle, but older accounts may not. Match the share price to how often you contribute.

A side-by-side look at the three approaches

The first fund is the giant that most people name first, with assets in the hundreds of billions and the tightest bid-ask spread. The second is nearly identical in holdings but comes from a different issuer and trades slightly cheaper per share. The third is the newcomer that undercut both on price to grab market share. All three own the same 500 companies in roughly the same weights. The practical difference is liquidity and the size of the cash buffer each keeps to handle redemptions.

Three index fund prospectuses fanned out on a desk next to a laptop

Watch the fine print on tracking and structure

Each fund aims to mirror the index but may hold a small cash sleeve or use a representative sampling method, which can cause it to lag the benchmark by a fraction of a percent in a given year. Check the tracked-error figure in the fact sheet; a fund that drifts more than about 0.10 percent from the index most years is doing something different from its peers. Also confirm the fund is structured to avoid unnecessary taxable distributions, since some vehicles pass gains to holders more often than others.

Where the differences actually show up

For a buy-and-hold saver adding a fixed sum each month, the three are close enough that convenience wins. Pick the one your broker lets you buy without a commission and that fits your contribution size. If you trade often, lean toward the fund with the deepest trading volume to keep your spread costs down. The wrong pick costs little; the right habit of contributing steadily matters far more.

  1. Note your monthly contribution and account minimums.
  2. Compare the three funds' expense ratios and share prices side by side.
  3. Buy the one with the lowest friction in your specific account.

None of these funds will beat the index by much, and that is the point. The win is capturing the market return with the least friction and forgetting about it.

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