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 Life and Death of a Twenty Dollar Bill How long does a $20 bill last? The Half Million Dollar Baby The true cost of raising a child may be far more than you expect. Four Really Good Reasons to Invest There are four very good reasons to start investing. Do you know what they are?