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 Retiring the 4% Rule A portfolio created with your long-term objectives in mind is crucial as you pursue your dream retirement. What's New for Social Security? There have been a number of changes to Social Security that may affect you, especially if you are nearing retirement. Saving for Retirement This calculator can help you estimate how much you may need to save for retirement.