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 Rightsizing for Retirement What does your home really cost? Social Security: The 64,000 Dollar Question One of the most common questions people ask about Social Security is when they should start taking benefits. Investment Strategies for Retirement Investment tools and strategies that can enable you to pursue your retirement goals.