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 Retirement Redefined Around the country, attitudes about retirement are shifting. 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. Tuning Your Social Security Benefit When should you take your Social Security benefit?