18 Years Worth of Days The average retirement lasts for 18 years. Are you prepared to fill that many days? Share | Have A Question About This Topic? Name Email Address Question Thank you! Oops! Related Contents The Power of Tax-Deferred Growth Why are 401(k) plans, annuities, and IRAs so popular? Volunteering in Retirement For many, retirement includes contributing their time and talents to an organization in need. Investment Strategies for Retirement Investment tools and strategies that can enable you to pursue your retirement goals.