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 Should You Tap Retirement Savings to Fund College? There are three things to consider before dipping into retirement savings to pay for college. Best-Performing Asset Classes Bonds may outperform stocks one year only to have stocks rebound the next. The Latte Lie and Other Myths Check out this video to begin separating fact from fiction.