Monthly GST deadlines (day of month)
Two returns drive monthly GST compliance. GSTR-1 reports your outward supplies (sales) and is due on the 11th of the next month. GSTR-3B is the summary return where you pay tax, and is due on the 20th of the next month.
- Late filing attracts a fee of ₹50/day (₹20/day for nil returns) plus 18% interest on tax paid late.
- Your customers can claim input tax credit only once your GSTR-1 reflects the invoice.
- Businesses under the QRMP scheme file quarterly instead — see our separate note.
Missing GSTR-3B also blocks the next period's filing, so delays compound quickly.
This is general information, not professional advice — confirm the current position for your specific case before acting.
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