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 RE: Retirement How does your ideal retirement differ from reality, and what can we do to better align the two? The History of Retirement Do you know where the idea of “retirement” comes from? Retirement Redefined Around the country, attitudes about retirement are shifting.