✍️ MoneyVerge Editorial Team 📅 Updated June 29, 2026 ⏱️ 10 min read
📌 Key Takeaway: Compare the best index funds of 2025 by expense ratio, performance, and long-term wealth-building potential. Our editorial team has independently researched this topic to bring you accurate, actionable, and up-to-date information for 2025.

📋 Table of Contents

  1. Overview
  2. Why This Matters in 2025
  3. Top Options Compared
  4. Expert Tips and Strategies
  5. Common Mistakes to Avoid
  6. Your Action Plan
  7. Frequently Asked Questions

Best Index Funds for 2025

2025's index fund landscape continues to be dominated by ultra-low-cost options from Vanguard, Fidelity, and Schwab, with Fidelity's zero-expense-ratio funds remaining a notable standout.

2025 Standouts

FundExpense Ratio
Fidelity ZERO Total Market (FZROX)0.00%
Vanguard 500 Index (VFIAX)0.04%

What Hasn't Changed

The core principles remain the same: minimize costs, maximize diversification, and stay invested for the long term. See our main index funds guide for the fullest comparison.

Choosing for 2025

Consider whether a mutual fund or ETF structure better fits your needs — both offer similarly low costs, with the main difference being trading mechanics rather than underlying investment strategy.

Common Mistakes

Overcomplicating your portfolio with too many overlapping funds — a simple 2-3 fund approach typically serves long-term investors just as well as a more complex lineup.

Frequently Asked Questions

What's the best index fund for 2025?

Fidelity's ZERO funds (0.00% expense ratio) and Vanguard's core index funds remain among the most cost-effective options. See our main guide for the fullest comparison.

Are zero-expense-ratio funds actually free?

They have no explicit expense ratio, though fund providers can still generate revenue through other means (like securities lending) — they're not a "catch," just a genuinely low-cost option.