18 Years Worth of Days The average retirement lasts for 18 years. Are you prepared to fill that many days? Share | Related Content Should You Tap Retirement Savings to Fund College? There are three things to consider before dipping into retirement savings to pay for college. Systematic Withdrawals in Retirement Taking regular, periodic withdrawals during retirement can be quite problematic. An Inside Look at Retirement Living A number of questions and concerns need to be addressed to help you better prepare for retirement living.