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📊 ETFs & Index Funds · Lesson 5 of 10 · 7 min

Expense Ratios — The Silent Killer

💸 A 1% fee sounds like a rounding error. Over 30 years it can quietly eat about a quarter of your money — handed to a fund manager who, in plenty of cases, did worse than a robot. It's the most expensive sentence most investors never bother to read.

💡 Key idea

Lower expense ratio = more money in YOUR pocket, not the fund company's.

🧠 Why it matters

EXPENSE RATIO = the annual fee an ETF or fund charges, taken automatically. VOO charges 0.03%. Some mutual funds charge 1.5%. The difference compounds — and not in your favor.

🌍 In the real world

📉 Two investors, both putting $10,000/yr into the market for 30 years. Both earn 8% before fees. Investor A pays 0.05% (low-cost ETF). Investor B pays 1.5% (typical mutual fund). After 30 years: A has about $1.21M, B about $920K. Same investment, same return — fees cost roughly $290,000.

📌 Takeaways

  • 0.03-0.10% = excellent
  • 0.50%+ = expensive
  • 1%+ = run away
📈Try it: Compound interest calculator →

📖 Terms in this lesson

Expense ratio: A fund's yearly fee as a percentage; 0.03% versus 1% is the difference of a fortune over decades.

✅ Test yourself

What's an expense ratio?
  1. A one-time signup fee
  2. Annual fee an ETF/fund charges, taken automatically
  3. Tax on profits
  4. Trading commission

Answer: B · Annual fee an ETF/fund charges, taken automatically

Expense ratios are deducted automatically from the fund's returns each year. You never see the bill — which makes them sneakier.

Which ETF has the LOWEST expense ratio?
  1. A 0.03% expense ratio fund
  2. A 0.10% expense ratio fund
  3. A 0.50% expense ratio fund
  4. A 1.00% expense ratio fund

Answer: A · A 0.03% expense ratio fund

Lower is better. VOO and VTI charge ~0.03% — about as cheap as it gets (a couple of funds go to 0.02% or even 0%).

Why do expense ratios matter so much over time?
  1. They don't, the difference is tiny
  2. They compound — small differences become huge over decades
  3. They only matter for retirement accounts
  4. Only the rich pay them

Answer: B · They compound — small differences become huge over decades

Compounding works against you with fees. 1% feels small for one year — but 30 years of 1% can eat about a quarter of your portfolio.

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