William P. Bengen
AUTHOR

William P. Bengen

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William P. Bengen received a B.S. from M.I.T. in Aeronautics & Astronautics and a M.S. from the College for Financial Planning. He has had four careers: trained as an aerospace engineer, CEO of his family’s soft drink bottling business in New York, fee-only financial planning practitioner in California, and currently a financial researcher and aspiring novelist in Arizona. He is a former CFP® licensee. In the early 1990s, in response to client questions, Mr. Bengen began research on the sustainability of retirement withdrawals from stock and bond portfolios, which gave rise to the so-called “4% Rule.” He is frequently quoted in major financial publications and appears regularly on financial industry podcasts. In 2014, he received NAPFA’s Robert J. Underwood Distinguished Service Award, and in 2017, the InvestmentNews Innovators Award. In 2023, he was awarded the Inside Information Iconoclast Award. He currently lives in SaddleBrooke, AZ, where he continues his research into the “4% Rule." For more information about Mr. Bengen and his research, please visit his website.
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