GST Late Payment Interest Calculator GST Type* Regular Composition GST Return Details Gross Tax Payable (other than reversal) Return Month Due Date Date of Filing Return IGST CGST SGST/UTGST IGST CGST SGST/UTGST Interest Total Interest Return Month Due Date Date of Filing Return Delay in Filing GST Return (In Days) IGST CGST SGST/UTGST Return Month Due Date Date of Filing Return IGST CGST SGST/UTGST RESULTS GST Return Details Delay in Filing GST Return (In Days) Interest @ 18% as per Section 50(1) of CGST Act Return Month Due Date Date of Filing Return IGST CGST SGST/UTGST