18 Years Worth of Days The average retirement lasts for 18 years. Are you prepared to fill that many days? Share | Have A Question About This Topic? Name Email Address Question Thank you! Oops! Related Contents 2017 Year in Review Take a look at this 2017 Market Recap. Social Security: Two Benefit Strategies Eliminated Here are several important changes to Social Security that may impact how and when you can begin taking income benefits. Retirement Plan Distributions There are a number of ways to withdraw money from a qualified retirement plan.