Retire comfortably at 55 with the 401k Rule of 55 or IRA Rule 72t. Learn about the 55t Rule and how it can benefit your 401k. Discover the 9 key rules of the Rule of 55 for maximizing your retirement income from 401k and 403b plans. Understand how the Rule of 55 works and what you need to know to take advantage of this retirement strategy.