18 Years’ Worth of Days The average retirement lasts for 18 years, with many lasting even longer. Will you fill your post-retirement days with purpose? Related Content Travel, Without the Baggage Tips to avoid checking in luggage on your next vacation. Suddenly Single: 3 Steps to Take Now Have you found yourself suddenly single? Here are 3 steps to take right now. What Can a Million Dollars Buy You? $1 million in a diversified portfolio could help finance part of your retirement.