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? Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content How Will Working Affect Social Security Benefits? Knowing the rules may help you decide when to start benefits. Best-Performing Asset Classes Bonds may outperform stocks one year only to have stocks rebound the next. The Real Cost of a Vacation Home What if instead of buying that vacation home, you invested the money?