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? Address Thank you! Oops! Related Contents Ready for Retirement? Are you ready for retirement? Here are five words you should consider. Does Your Portfolio Fit Your Retirement Lifestyle? Lifestyle considerations in creating your retirement portfolio. Retirement Plan Distributions There are a number of ways to withdraw money from a qualified retirement plan.