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 Question Thank you! Oops! Related Content The ABC’s of Auto Insurance What kind of auto insurance should you have? Do you know? Capital Gains Tax Estimator Use this calculator to estimate your capital gains tax. Eight Mistakes That Can Upend Your Retirement There are common mistakes you can avoid when saving for retirement.