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? Three Key Questions to Answer Before Taking Social Security When to start? Should I continue to work? How can I maximize my benefit? Saving for Retirement This calculator can help you estimate how much you may need to save for retirement.