4% Rule (Retirement Withdrawal)

The 4% rule suggests withdrawing 4% of your initial portfolio in the first year, then adjusting for inflation annually, with a high probability of not running out of money over 30 years.

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Exam Tip

4% rule = Trinity Study. Assumes 30-year retirement. Early retirees may need 3-3.5%.

What is the 4% Rule?

The 4% rule is derived from the Trinity Study (1998) for sustainable retirement withdrawals.

How It Works

YearCalculation
Year 14% Ɨ Initial Portfolio
Year 2+Previous + inflation

Assumptions

  • 30-year retirement
  • 50-75% stocks
  • Annual rebalancing

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