How to Retire Early Retiring early sounds like a dream come true, but it’s important to take a look at the cold, hard facts. Related Content Retirement Is a Beginning Key questions to answer when you are considering retirement. 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? Retirement Plan Detectives A couple become Retirement Plan Detectives, searching records from old employers.