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? Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content Retirement Questions That Have Nothing to Do With Money Things to consider before retirement. Personal Finance Calendar Use this handy calendar to remember the year’s most important financial dates. Estimate Your RMD Help determine the required minimum distribution from an IRA or other qualified retirement plan.