18 Years Worth of Days Test Your Investment Knowledge! How much do you know about investing? Take our quiz and find out instantly. First Name Last Name Email Address Thank you! Oops! 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 Retirement Redefined Around the country, attitudes about retirement are shifting. Caring for Aging Parents As our nation ages, many Americans are turning their attention to caring for aging parents. Retirement Plan Distributions There are a number of ways to withdraw money from a qualified retirement plan.