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? Address Thank you! Oops! Related Contents Rightsizing for Retirement What does your home really cost? Social Security: The $64,000 Question One of the most common questions people ask about Social Security is when they should start taking benefits. Investment Strategies for Retirement Investment tools and strategies that can enable you to pursue your retirement goals.