Filed a GST return late? Use this calculator to see the late fee and the interest you will have to pay. It works for GSTR-3B, GSTR-1 and the GSTR-9 annual return, using the current late fee caps.
GST Late Fee and Interest Calculator
For GSTR-3B, GSTR-1 and GSTR-9
For GSTR-3B, GSTR-1 and GSTR-9
Interest at 18% a year runs on tax paid in cash after the due date.
How the late fee works
| Return | Late fee per day (CGST + SGST) | Maximum per return |
|---|---|---|
| GSTR-3B or GSTR-1, nil return | Rs 20 | Rs 500 |
| GSTR-3B or GSTR-1, turnover up to Rs 1.5 crore | Rs 50 | Rs 2,000 |
| GSTR-3B or GSTR-1, Rs 1.5 crore to Rs 5 crore | Rs 50 | Rs 5,000 |
| GSTR-3B or GSTR-1, above Rs 5 crore | Rs 50 | Rs 10,000 |
| GSTR-9, turnover up to Rs 5 crore | Rs 50 | 0.04% of turnover in the State |
| GSTR-9, Rs 5 crore to Rs 20 crore | Rs 100 | 0.04% of turnover in the State |
| GSTR-9, above Rs 20 crore | Rs 200 | 0.5% of turnover in the State |
For GSTR-3B and GSTR-1 the turnover band is the aggregate turnover of the previous financial year (Notifications 19/2021 and 20/2021-Central Tax). Interest under Section 50 is separate, at 18% a year on tax paid in cash after the due date, and it has no cap.
Got a GST notice for late filing or a mismatch? Upload your notice for a free first check. Also see the GST due dates for 2026-27 and the advance tax interest calculator.
Law as on 14 November 2026. This is an estimate. The GST portal shows the final late fee when you file.