Tool
Late Fee & Interest Calculator.
Estimate the late fee and interest for a delayed GSTR-3B filing. This is an estimate for planning purposes, not a substitute for the portal's calculation.
Split between CGST and SGST/IGST as applicable — enter the total.
Standard rate is 18% p.a. on unpaid tax under Section 50.
Estimated Result
Late Fee (CGST + SGST)
₹
Interest on Tax
₹
Total Payable
₹
This calculator gives a standard-formula estimate only. Late fee caps, waivers and interest rates have changed by notification in the past — confirm the exact amount on the GST portal at the time of payment. This is not a substitute for professional advice.