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 A Fruitful Retirement: Social Security Benefit Taking your Social Security benefits at the right time may help maximize your benefit. Split Annuity Strategy Here's one strategy that combines two different annuities to generate income and rebuild principal. Investment Strategies for Retirement Investment tools and strategies that can enable you to pursue your retirement goals.