18 Years Worth of Days The average retirement lasts for 18 years. Are you prepared to fill that many days? Share | Related Content 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. What Is a Stretch IRA? If you have a traditional IRA, you may have the opportunity to extend its tax-deferred status across multiple generations. Investment Strategies for Retirement Investment tools and strategies that can enable you to pursue your retirement goals.