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? Share | Related Content Rightsizing for Retirement What does your home really cost? Immediate vs. Deferred Annuities Looking forward to retirement? It's critical to understand the difference between immediate and deferred annuities. An Inside Look at Retirement Living A number of questions and concerns need to be addressed to help you better prepare for retirement living.