18 Years’ Worth of Days The average retirement lasts for 18 years, with many lasting even longer. Will you fill your post-retirement days with purpose? 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. How Women Can Prepare For Retirement Are women prepared for a 20-year retirement? Investment Strategies for Retirement Investment tools and strategies that can enable you to pursue your retirement goals.