18 Years Worth of Days The average retirement lasts for 18 years. Are you prepared to fill that many days? Share | Related Content A Fruitful Retirement: Social Security Benefit Taking your Social Security benefits at the right time may help maximize your benefit. When Should You Take Social Security Monthly Social Security payments differ substantially depending on when you start receiving benefits. An Inside Look at Retirement Living A number of questions and concerns need to be addressed to help you better prepare for retirement living.