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? Address Thank you! Oops! Related Contents A Bucket Plan to Go with Your Bucket List A bucket plan can help you be better prepared for a comfortable retirement. How Will Working Affect Social Security Benefits? Knowing the rules may help you decide when to start benefits. Retirement Plan Distributions There are a number of ways to withdraw money from a qualified retirement plan.