How to Retire Early Retiring early sounds like a dream come true, but it’s important to take a look at the cold, hard facts. Share | Have A Question About This Topic? Name Email Address Question Thank you! Oops! Related Contents 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? How Will Working Affect Social Security Benefits? Knowing the rules may help you decide when to start benefits. My Retirement Savings Estimate how long your retirement savings may last using various monthly cash flow rates.