The author and creator of ‘the 4% rule’ discusses the pros and cons of various withdrawal strategies and key risk factors facing retirees today.
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Our guest on the podcast today is William Bengen. Bill has been a prolific researcher of retirement planning matters over his career, and he pioneered the exploration of safe withdrawal rates with his groundbreaking 1994 research that gave birth to what’s now called the 4% rule. His new book, A Richer Retirement: Supercharging the 4% Rule to Spend More and Enjoy More was published in August 2025. Bill is the former owner of Bengen Financial Services, an independent registered investment advisor that he launched in 1989 after his family sold the soda bottling business that he had helped manage. He received his Bachelor of Science degree in aeronautics and astronautics from MIT. Bill retired from his financial planning practice in 2013 but continues to conduct research on retirement planning and withdrawal rates.
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