Notification No. 13/2017 – Central Tax, states the rate of interest to be paid or received by the taxpayers under CGST. The interest rate in case of delayed payment is 28%, reversal of input tax credit in case of a mismatch, ITC availed before supplier uploads the invoice the interest rate is 24%, in case of delayed refund the interest rate is 6% and in case of refund under adjudication process it is 9%.