GST Filing Deadlines 2026 — Complete Calendar
A complete month-by-month calendar of all GST return due dates for FY 2025-26, including GSTR-1, GSTR-3B, GSTR-9, and penalty guidelines.
Missing a GST filing deadline is one of the most common compliance mistakes Indian businesses make — and it comes with automatic late fees and interest. For FY 2025-26, this calendar gives you every key due date so you can plan ahead and file on time.
Monthly GST Return Deadlines
Two returns are mandatory for most regular GST-registered businesses every month: GSTR-1 (outward supplies) and GSTR-3B (summary return with tax payment).
| Return | Period | Due Date | Who Files |
|---|---|---|---|
| GSTR-1 | Monthly (turnover > ₹5 Cr) | 11th of next month | Regular taxpayers |
| GSTR-1 (QRMP) | Quarterly | 13th of month after quarter | Turnover up to ₹5 Cr |
| GSTR-3B | Monthly | 20th of next month | All regular taxpayers |
| GSTR-3B (QRMP) | Quarterly | 22nd / 24th (state-wise) | Turnover up to ₹5 Cr |
Annual GST Return — GSTR-9
GSTR-9 is the annual return consolidating all monthly/quarterly filings for the financial year. It is mandatory for businesses with annual turnover above ₹2 crore.
- GSTR-9 (Annual Return): Due 31 December 2026 for FY 2025-26
- GSTR-9C (Reconciliation Statement): Due 31 December 2026 for turnover above ₹5 Cr
- GSTR-4 (Composition Scheme): Due 30 April 2026 for FY 2025-26
Penalties for Late GST Filing
- Late fee for GSTR-3B: ₹50/day (₹25 CGST + ₹25 SGST), capped at ₹10,000 per return
- Nil return late fee: ₹20/day (₹10 CGST + ₹10 SGST), capped at ₹500
- Interest on unpaid tax: 18% per annum from due date
- GSTR-1 late fee: ₹50/day, capped at ₹10,000
Key Dates at a Glance — FY 2025-26
- April 2026: GSTR-3B for March due 20 April
- May 2026: TDS Q4 return (Jan–Mar) due 31 May
- July 2026: ITR filing for individuals due 31 July
- September 2026: DIR-3 KYC for company directors due 30 September
- October 2026: ITR for companies (audit required) due 31 October
- December 2026: GSTR-9 Annual Return due 31 December
Filing on time not only avoids penalties — it keeps your GST registration active, your input tax credit intact, and your business in good standing with the GST authorities.
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