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The Biggest Mistakes in Personal Finance — Key Takeaways

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The Biggest Mistakes in Personal Finance

Ben Felix16mFeb 8, 2026

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Saving 10% of income in a 100% globally diversified stock index fund from age 25–65 produces better expected retirement outcomes than saving 57% in cash or 19% in a 60/40 portfolio.

Key takeaways

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In this video

  1. 1mIntro
  2. 1mNot earning enough money
  3. 2mUnder-saving
  4. 4mNot setting financial goals
  5. 6mOver-spending (on the wrong things)
  6. 9mNot taking enough risk
  7. 11mTaking the wrong kind of risk
  8. 12mMissing tax planning opportunities
  9. 13mIgnoring estate planning
  10. 14mMarrying a financially incompatible spouse
  11. 15mUnder-insuring catastrophic risks

“No amount of frugality can solve the effects of having a low income.”

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