18 Years Worth of Days The average retirement lasts for 18 years. Are you prepared to fill that many days? Share | Have A Question About This Topic? Name Email Address Question Thank you! Oops! Related Contents Tuning Your Social Security Benefit When should you take your Social Security benefit? Women and Financial Strategies Most women don’t shy away from the day-to-day financial decisions, but some may be leaving their future to chance. Retirement Plan Distributions There are a number of ways to withdraw money from a qualified retirement plan.