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 RE: Retirement How does your ideal retirement differ from reality, and what can we do to better align the two? Certain Uncertainties in Retirement The uncertainties we face in retirement can erode our sense of confidence. Potential Income from an IRA Estimate your monthly and annual income from various IRA types.