Dream retirement: Generate a wealthy cash flow and corpus with the 30:30:40 rule! Dream retirement: Generate a wealthy cash flow and corpus with the 30:30:40 rule! Why understanding the 30:30:40 formula is good for financial freedom Karan Dsij / Monday, October 9, 2023 / Article rating: 3.7 The 30:30:40 rule is a simple formula that, if followed diligently, can help you become financially independent in 15 years. Let's break it down: