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? Related Content The Average American Budget Learn about the average American budget in this fun and interactive piece. Financial Strategies for Women Some may leave their future to chance but in the world of finance, the effects of the "confidence gap" can be apparent. RE: Retirement How does your ideal retirement differ from reality, and what can we do to better align the two?