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 Retirement Redefined Around the country, attitudes about retirement are shifting. Social Security: Five Facts You Need to Know Here are five facts about Social Security that are important to keep in mind. An Inside Look at Retirement Living A number of questions and concerns need to be addressed to help you better prepare for retirement living.