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. Systematic Withdrawals in Retirement Taking regular, periodic withdrawals during retirement can be quite problematic. Investment Strategies for Retirement Investment tools and strategies that can enable you to pursue your retirement goals.