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 Avoiding Cognitive Decline Try these activities to keep your brain sharp. Estimate Your RMD Help determine the required minimum distribution from an IRA or other qualified retirement plan. Errors and Omissions Insurance E&O insurance is specifically designed to protect you, or your company, from the risk of a client’s dissatisfaction.