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? Share | Related Content Should You Ever Retire? A growing number of Americans are pushing back the age at which they plan to retire. Or deciding not to retire at all. Who Is Your Trusted Contact? This investment account question is vital and answered as early as possible. Investment Strategies for Retirement Investment tools and strategies that can enable you to pursue your retirement goals.