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. An Inside Look at Retirement Living A number of questions and concerns need to be addressed to help you better prepare for retirement living.