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 Social Security: By the Numbers Here are five facts about Social Security that might surprise you. 9 Facts About Social Security There are things about Social Security that might surprise you. An Inside Look at Retirement Living A number of questions and concerns need to be addressed to help you better prepare for retirement living.