GST late fee & interest calculator
Work out the exact late fee and 18% interest on a delayed GSTR-1, GSTR-3B or GSTR-4 filing.
- Days of delay
- 0
- Late fee (₹50/day)
- ₹0
- Interest @ 18% p.a.
- ₹0
- Total payable
- ₹0
How this is computed
- •Late fee for GSTR-3B and GSTR-1 is ₹50 per day of delay (₹25 CGST + ₹25 SGST) for returns with tax payable, and ₹20 per day (₹10 + ₹10) for nil returns.
- •Interest under section 50 is charged at 18% per annum on the net tax paid in cash, computed from the day after the due date to the date of payment.
- •Statutory maximum late fee caps apply by turnover slab; this tool shows the uncapped computation so you can see the full exposure.
Want this filed instead of calculated? Our fixed-fee GST return filing service is handled end to end by qualified professionals.
View service & feesFrequently asked
Is late fee charged even on a nil GST return?
Yes. A nil GSTR-3B or GSTR-1 still attracts ₹20 per day of delay until the return is filed.
Is interest charged on the gross tax or only the cash portion?
Interest under section 50(1) is charged on the tax paid by debiting the electronic cash ledger, not on the portion set off through input tax credit.