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. Are you prepared to fill that many days? What Is a Roth 401(k)? Roth 401(k) plans combine features of traditional 401(k) plans with those of a Roth IRA. Investment Strategies for Retirement Investment tools and strategies that can enable you to pursue your retirement goals.