VOO Calculator

VOO vs. SPLG

Two of the lowest-cost ways to track the S&P 500, from two different fund families.

At a glance

TickerFundIssuerIndex trackedExpense ratio
VOOVanguard S&P 500 ETFVanguardS&P 5000.03%
SPLGSPDR Portfolio S&P 500 ETFState StreetS&P 5000.02%

Data last verified: 2026-09-17

Two answers to the same question

SPLG state street's newer, lower-cost s&p 500 etf, positioned as a cheaper alternative to spy. Like VOO, it uses a standard open-end ETF structure rather than a unit investment trust, which is why both funds have historically carried lower costs than SPY. This comparison comes down to issuer preference and fund size more than any structural advantage of one over the other.

Which should you choose?

If you already hold other Vanguard funds and prefer consolidating with one issuer, VOO fits naturally. If you use State Street products elsewhere, or your broker offers SPLG commission-free while VOO isn’t, that logistical factor may matter more than any difference in the funds themselves.

Project your investment with the VOO calculator — given both funds track the same index at a similarly low cost, the results are a close approximation for SPLG as well.

More comparisons

  • VOO vs. SPY — the older, higher-cost fund SPLG was built to undercut
  • VOO vs. IVV — another near-identical, low-cost S&P 500 ETF

Frequently asked questions

That's roughly how State Street has positioned it — SPLG tracks the same S&P 500 index as SPY but uses a modern, lower-cost ETF structure instead of SPY's older unit investment trust structure, giving it a lower expense ratio closer to VOO's.

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.