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 Rightsizing for Retirement What does your home really cost? 9 Facts About Retirement Regardless of how you approach retirement, there are some things about it that might surprise you. Investment Strategies for Retirement Investment tools and strategies that can enable you to pursue your retirement goals.