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. 5 Benefits of Working in Retirement Here are 5 reason why you may consider working through retirement. Investment Strategies for Retirement Investment tools and strategies that can enable you to pursue your retirement goals.