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 Retirement Redefined Around the country, attitudes about retirement are shifting. Choosing a Retirement Plan that Fits Your Business To choose a plan, it’s important to ask yourself four key questions. Investment Strategies for Retirement Investment tools and strategies that can enable you to pursue your retirement goals.