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 Money that Buys Good Health is Never Ill Spent It's important to make sure your retirement strategy anticipates health-care expenses. 5 Benefits of Working in Retirement Here are 5 reason why you may consider working through retirement. Managing an Inheritance A windfall from a loved one can be both rewarding and complicated.