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 Mortgages in Retirement Explore the benefits and drawbacks to paying off your mortgage prior to retirement with this article. Buying Auto Insurance For Teen Drivers Tips on insuring your teen driver. Managing the Risk of Outliving Your Money Steps to help you sustain and grow your retirement savings.