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 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. Starting a Roth IRA for a Teen This early financial decision could prove helpful over time. An Inside Look at Retirement Living A number of questions and concerns need to be addressed to help you better prepare for retirement living.