The Cash Flow is calculated by subtracting all your monthly expenses from your monthly gross income. The Cash Flow is shown on a monthly basis. Enter the targeted monthly Cash Flow on the input field to obtain the Offer Price to meet your financial objective. If you have money left over, you have earned a positive Cash Flow. If you do not have money left over, you will have a negative Cash Flow. This is a bad situation to be in, and that is why running the numbers is extremely important. There will be occasions when a repair could cause you to have a negative cash flow, but this should not happen on a regular basis, unless you are buying a property for appreciation.