4% → 95% success
Safe withdrawal rates: beyond the 4% rule
Safe withdrawal rates depend on retirement length: 4% works for 30 years (Trinity Study), 3.5% for 40 years, and 3% for 50+ years. The rate assumes a balanced 50-75% stock portfolio and inflation-adjusted withdrawals. Sequence-of-returns risk in the first decade is the biggest threat — bond tents and flexible spending strategies help mitigate it.
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Try calculatorKey takeaways
04 · ideas- 4% rule has 95%+ success rate over 30 years of historical data
- Early retirees (retiring at 40) may need 3.0–3.5% to last 50+ years
- Flexible spending rules increase safe withdrawal rates by 0.5–1%
- Sequence of returns risk matters most in the first 10 years
The 4% rule says: if you withdraw 4% of your portfolio in year 1 and adjust for inflation each year, your money should last at least 30 years. Based on historical US stock and bond returns since 1926, this has worked ~95% of the time.
Simple example: With $1,000,000 saved, you withdraw $40,000 in year 1. If inflation is 3%, you withdraw $41,200 in year 2, $42,436 in year 3, and so on.
The "failure" cases were mostly retirements that started in 1929 (market crash) or 1966 (high inflation decade). Even these required hitting extraordinary bad luck twice in a row.
Rule of thumb: To retire comfortably, save 25× your annual expenses. At $50,000/year expenses → need $1,250,000.