Section 7(4)(c) in Goods and Services Tax (Compensation to States) Act, 2017
(c)the provisional compensation payable to any State at the end of the relevant two months period in any financial year shall be the difference between the projected revenue till the end of the relevant period in accordance with clause (a) and the actual revenue collected by a State in the said period as referred to in clause (b), reduced by the provisional compensation paid to a State till the end of the previous two months period in the said financial year during the transition period.