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 | Related Content 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 Women Can Prepare For Retirement Are women prepared for a 20-year retirement? A Look at Systematic Withdrawals This calculator may help you estimate how long funds may last given regular withdrawals.