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 Tuning Your Social Security Benefit When should you take your Social Security benefit? Split Annuity Strategy Here's one strategy that combines two different annuities to generate income and rebuild principal. Investment Strategies for Retirement Investment tools and strategies that can enable you to pursue your retirement goals.