18 Years Worth of Days The average retirement lasts for 18 years. Are you prepared to fill that many days? Share | Related Content Retiring the 4% Rule A portfolio created with your long-term objectives in mind is crucial as you pursue your dream retirement. Social Security: The $64,000 Question One of the most common questions people ask about Social Security is when they should start taking benefits. Retirement Plan Distributions There are a number of ways to withdraw money from a qualified retirement plan.