Bennett's most notable business success began in 1984 when he became chief executive office of the Franklin International Institute, Inc., a firm with only four full-time employees. When he left to become a candidate for the United States Senate, the corporation, now listed on the New York Stock Exchange and known as Franklin Quest, employed nearly 1,000 and had annual sales of over $90,000,000. Franklin Quest is known internationally for its day planners and time-management seminars.
While at Franklin, Bennett published his widely read book Gaining Control. In 1989 Bennett was named "Entrepreneur of the Year" for the Rocky Mountain region by Inc. magazine, and Franklin was recognized by the magazine as one of the nation's 500 fastest-growing companies.