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 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. Annuity Comparison This calculator compares a hypothetical fixed annuity with an account where the interest is taxed each year.