Refer sub section (3) of Section 50 of the CGST Act 2017.
The Provision of the Law is reproduced below :
"A taxable person who makes an undue or excess claim of input tax credit under sub-section [10] of Section 42, or undue or excess reduction in output tax liability under sub-section [10] of Section 43, shall pay interest on such undue or excess claim or on such undue or excess reduction, as the case may be, at such rate not exceeding TWENTY FOUR PER CENT, as may be notified by the Government on the recommendations of the Council."