Should You Ever Retire? A growing number of Americans are pushing back the age at which they plan to retire. Or deciding not to retire at all. 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? Systematic Withdrawals in Retirement Taking regular, periodic withdrawals during retirement can be quite problematic. Inflation & Retirement Estimate how much income may be needed at retirement to maintain your standard of living.