Safe Withdrawal Rate (SWR)

The safe withdrawal rate is the annual percentage you can withdraw from your portfolio with a high probability (usually 90-95%) that your money will last throughout a 30-year retirement.

The 4% Rule:

The most famous SWR study (Trinity Study, 1998):

• 4% initial withdrawal, inflation-adjusted annually
• 50/50 stocks/bonds portfolio
• 95% success rate over 30 years

How It Works:

Year 1: Withdraw 4% of initial portfolio Subsequent years: Increase by inflation

Example:

• $1,000,000 portfolio
• Year 1: $40,000 withdrawal
• Year 2 (3% inflation): $41,200
• Year 3: $42,436
• Continue adjusting for inflation

Factors Affecting Safe Withdrawal Rate:

Factor	Higher SWR	Lower SWR
Time horizon	Shorter retirement	Longer retirement
Asset allocation	More stocks	More bonds
Flexibility	Can reduce spending	Fixed spending
Other income	Social Security, pension	Portfolio only
Valuations	Low CAPE	High CAPE (today)

Current SWR Debate:

Many experts suggest lower rates today:

• 3.3%: Based on current valuations
• 3.5%: More conservative approach
• 4.0%: Traditional rule
• 4.5%+: With flexibility or other income

SWR vs. Spending Strategies:

Strategy	Description	Risk
Fixed %	4% every year, no inflation adjust	Spending volatility
Guardrails	Adjust within ceiling/floor	Moderate
VPW	Variable % based on age/balance	Complex
Floor + upside	Cover needs, variable wants	Requires planning

Key Considerations:

• 4% isn't guaranteed—it's a probability
• Based on US historical data
• Doesn't account for taxes or fees
• Sequence risk can still cause failure
• Having flexibility dramatically improves outcomes