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 Rightsizing for Retirement What does your home really cost? Take the Stage: Starting Out Start planning for their financial futures by following a few helpful guidelines. Retirement Plan Distributions There are a number of ways to withdraw money from a qualified retirement plan.