Retiring the 4% Rule A portfolio created with your long-term objectives in mind is crucial as you pursue your dream retirement. Share | Have A Question About This Topic? Name Email Address Question Thank you! Oops! Related Contents 18 Years Worth of Days The average retirement lasts for 18 years. Are you prepared to fill that many days? Social Security: The $64,000 Question One of the most common questions people ask about Social Security is when they should start taking benefits. A Look at Systematic Withdrawals This calculator may help you estimate how long funds may last given regular withdrawals.