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 Retiring the 4% Rule A portfolio created with your long-term objectives in mind is crucial as you pursue your dream retirement. Retirement Traps to Avoid Beware of these traps that could upend your retirement. Retirement Plan Distributions There are a number of ways to withdraw money from a qualified retirement plan.