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? Retirement Traps to Avoid Beware of these traps that could upend your retirement. Investment Strategies for Retirement Investment tools and strategies that can enable you to pursue your retirement goals.