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? Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content The Lowdown on Those Free Credit Scores What’s the deal with your yearly free credit report? How Women Can Prepare For Retirement Are women prepared for a 20-year retirement? A Primer on Dividends A company's profits can be reinvested or paid out to the company’s shareholders as “dividends."