Disclaimer : Please note that, these calculations are always subject to variations of the market value as well as variations of the stamp duty applicable from time to time and concern notifications and the nature & contents of the subject agreement / deed / document and also subject to personal verifications by flat purchasers at their own and / or through their experts. it is to be noted that general rule is that the stamp duty is payable on market value or agreement / deed / document value, whichever is higher.