Retiring the 4% Rule A portfolio created with your long-term objectives in mind is crucial as you pursue your dream retirement. Share | Related Content 18 Years Worth of Days The average retirement lasts for 18 years. Are you prepared to fill that many days? Where Will Your Retirement Money Come From? Retirement income may come from a variety of sources. Here's an overview of the six main sources. Retirement Plan Distributions There are a number of ways to withdraw money from a qualified retirement plan.