Bengen book refers to William P. Bengen's latest work, "A Richer Retirement: Supercharging the 4% Rule to Spend More and Enjoy More." This book provides a comprehensive guide for retirees on how to maximize withdrawals from their investment accounts without depleting their savings prematurely. Bengen, a financial researcher and former Certified Financial Planner licensee, is best known for developing the "4% rule" in 1993, a cornerstone of retirement planning that suggests a safe withdrawal rate for a 30-year retirement. In his new book, released on August 5, 2025, he refines and updates this rule, suggesting that with a more diversified portfolio, retirees might be able to start with a 4.7% withdrawal rate. The book offers data-driven tips, including strategies for calculating individualized safe withdrawal rates based on inflation and market conditions, diversifying portfolios, and adjusting spending throughout retirement.
