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. The Pre-Retirement Checklist This checklist can give you a quick snapshot of how prepared you are. A Look at Systematic Withdrawals This calculator may help you estimate how long funds may last given regular withdrawals.