Hi should I pay in black for a real estate property

First understand that stamp duty and registration costs vary from one state to other state. For example – In Maharashtra, its 6% + 1% = 7% in total , so whatever is your total agreement cost , you will have to bear additional 7% on that amount as stamp duty + registration costs. Given the huge amount involved and the financial crunch every buyer faces at the last moment of the deal and hunger of builders to save every bit of tax, makes sure that buyers fall for this trick of paying huge amount in CASH (black money) and register the property at lower price just for few thousands (actually sizable if you look at it). This looks like win-win situation to buyers and they are pretty happy about it, however truly speaking, this is a loosing deal for the buyers in a very long run (if you are going to sell the property later) and only benefits the builders and let me now explain you why is it so ?