GST Return Calculator — Avoid Late Filing Penalties
Calculate GST return filing deadlines and potential late fees. Understand GSTR-1 GSTR-3B and annual return requirements for your business.
GST return filing is mandatory for all registered businesses in India. GSTR-1 (outward supplies) is due on the 11th of the following month. GSTR-3B (summary return with tax payment) is due on the 20th. Late filing attracts Rs 50 per day (Rs 25 CGST + Rs 25 SGST) capped at Rs 10000 per return. Additionally 18% interest applies on unpaid tax from the due date. Consistent late filing can lead to GST registration cancellation.
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GST Calculator
Key Information
| Parameter | Details |
|---|---|
| GSTR-1 Due Date | 11th of following month |
| GSTR-3B Due Date | 20th of following month |
| Late Fee (per day) | Rs 50 (Rs 25 CGST + Rs 25 SGST) |
| Late Fee Cap | Rs 10000 per return |
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Use Calculator NowFrequently Asked Questions
What is the penalty for late GST return?
Late filing: Rs 50/day (Rs 25 CGST + Rs 25 SGST) up to Rs 10000 maximum per return period. For nil returns: Rs 20/day (Rs 10 CGST + Rs 10 SGST) up to Rs 10000. Interest on unpaid tax: 18% per annum from the due date. If GSTR-3B is filed late by 3 months continuously the GST registration may be cancelled by the department.
Which GST returns do I need to file?
Regular taxpayer: GSTR-1 (monthly by 11th) + GSTR-3B (monthly by 20th) + GSTR-9 (annual by 31 December). Composition scheme: CMP-08 (quarterly) + GSTR-4 (annual). If turnover is under Rs 5 crore: GSTR-1 can be filed quarterly under QRMP scheme. All businesses must file annual GSTR-9 reconciling monthly returns with books of accounts.
How to file GST returns on time?
Set calendar reminders for the 8th (prepare GSTR-1) and 17th (prepare GSTR-3B) of each month. Use GST accounting software like Tally ClearTax or Zoho that auto-generates returns from your invoices. Reconcile input tax credit monthly to avoid mismatches. For small businesses consider hiring a CA or GST practitioner (Rs 1000-3000/month) to handle filing and compliance.
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Last updated: March 2026