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 Message Thank you! Oops! Related Content Social Security: By the Numbers Here are five facts about Social Security that might surprise you. Eight Mistakes That Can Upend Your Retirement There are common mistakes you can avoid when saving for retirement. Investment Strategies for Retirement Investment tools and strategies that can enable you to pursue your retirement goals.