GST Due Date Calendar — Complete Guide for FY 2026-27
Staying on top of every GST due date is one of the most critical responsibilities for any GST-registered taxpayer in India. Whether you are a regular monthly filer, a small business under the QRMP scheme, or a composition dealer, missing a GST filing deadline can result in steep late fees under Section 47, interest at 18% per annum under Section 50, and even suspension of your GSTIN in cases of prolonged non-compliance. Our interactive GST Due Date Calendar on this page keeps you ahead of every deadline — completely free, no sign-up required, updated for FY 2026-27 and beyond.
This tool consolidates all GST due dates — including GSTR-1, GSTR-3B, GSTR-4, GSTR-7, GSTR-8, GSTR-9, GSTR-9C, CMP-08, IFF, and PMT-06 — into a single, easy-to-navigate calendar. You can switch between monthly and quarterly views, filter by return category, select your state group for staggered GSTR-3B due dates, and even export the schedule to your Google Calendar, Outlook, or Apple Calendar via an ICS file.
GST Due Dates Chart — All Returns at a Glance
The GST due dates chart below summarises the key statutory deadlines that every taxpayer should bookmark for FY 2026-27. The dates are drawn directly from the CGST Act, 2017 and related CBIC notifications:
| Return / Form | Taxpayer Type | Frequency | GST Due Date |
|---|---|---|---|
| GSTR-1 (Monthly) | Turnover > ₹5 Crore | Monthly | 11th of next month |
| GSTR-1 (Quarterly) | QRMP Scheme (≤ ₹5 Cr) | Quarterly | 13th of month after quarter |
| GSTR-3B (Monthly) | Turnover > ₹5 Crore | Monthly | 20th of next month |
| GSTR-3B (QRMP Cat-1) | Category 1 States (MH, GJ, KA…) | Quarterly | 22nd of month after quarter |
| GSTR-3B (QRMP Cat-2) | Category 2 States (DL, UP, RJ…) | Quarterly | 24th of month after quarter |
| CMP-08 | Composition Scheme Dealers | Quarterly | 18th of month after quarter |
| GSTR-4 (Annual) | Composition Scheme Dealers | Annual | 30th April (FY end) |
| GSTR-9 (Annual) | Regular Taxpayers (> ₹2 Cr) | Annual | 31st December (FY end) |
| IFF (QRMP) | QRMP taxpayers (optional, M1 & M2) | Monthly | 13th of next month |
| PMT-06 (QRMP Tax) | QRMP taxpayers (M1 & M2 challan) | Monthly | 25th of next month |
GST Due Date for Monthly Return — GSTR-1 & GSTR-3B
Taxpayers with an aggregate annual turnover exceeding ₹5 Crore are mandatorily required to file monthly GST returns. Under this scheme:
- →GSTR-1 due date (monthly): The 11th of every month for the preceding month's outward supplies. For example, GSTR-1 for September 2026 is due on 11th October 2026. Filing GSTR-1 timely is essential because it auto-populates GSTR-2B for your recipients — enabling their ITC claims.
- →GSTR-3B due date (monthly): The 20th of every month for the preceding month's summary return and tax payment. GSTR-3B must be filed even if there are no transactions in the period. A delay beyond the 20th triggers late fee and interest immediately.
The GST due date monthly cycle runs in tandem — GSTR-1 first (by 11th), followed by GSTR-3B (by 20th). It is strongly recommended to reconcile your GSTR-2B (auto-populated ITC statement) before filing GSTR-3B to ensure your ITC claim is accurate and fully matched.
GST Due Date for Quarterly Return — QRMP Scheme
Small and medium businesses with an aggregate annual turnover up to ₹5 Crore can opt for the Quarterly Return Monthly Payment (QRMP) scheme, which reduces the compliance burden from 12 GSTR-3B filings per year to just 4 quarterly returns. The GST due date for quarterly return under QRMP works as follows:
- →GSTR-1 (Quarterly): Due by the 13th of the month following the quarter-end. For Q2 (Jul–Sep), this means 13th October.
- →IFF (Invoice Furnishing Facility): An optional facility for QRMP filers to upload B2B invoices in Month 1 and Month 2 of the quarter by the 13th of the following month — enabling recipients to get timely ITC via GSTR-2B even within a quarter.
- →PMT-06 (Monthly Tax Challan): Tax payment for months 1 and 2 of the quarter must be made via PMT-06 by the 25th of the following month. Payment can be made using the fixed sum method (35% of last quarter's net tax) or self-assessment method.
- →GSTR-3B (Quarterly): Due by 22nd (Category 1 states) or 24th (Category 2 states) of the month following the quarter-end. Category 1 includes states like Maharashtra, Gujarat, Karnataka, and Tamil Nadu. Category 2 includes Delhi, Uttar Pradesh, Rajasthan, and others.
Composition Scheme GST Due Date — CMP-08 & GSTR-4
Taxpayers registered under the GST Composition Scheme (eligible for businesses with turnover up to ₹1.5 Crore, or ₹75 Lakh for special category states) have the simplest compliance calendar. They do not collect GST from customers and pay tax at a flat rate on their turnover. The composition GST due date obligations are:
- →CMP-08 (Quarterly Statement): A self-assessed tax payment statement filed quarterly. The composition GST due date for CMP-08 is the 18th of the month following the quarter (e.g., 18th October for Q2 Jul–Sep).
- →GSTR-4 (Annual Return): Composition dealers file one annual return — GSTR-4 — by 30th April of the year following the financial year. This consolidates all four quarters' details into a single annual return.
Composition scheme taxpayers cannot claim ITC and must display "Composition Taxable Person, not eligible to collect tax on supplies" on their invoices/bills of supply.
Consequences of Missing GST Due Dates
Non-compliance with GST due dates has financial and legal consequences. Under Section 47 of the CGST Act, a late fee is charged for every day of delay — ₹50 per day (₹25 CGST + ₹25 SGST) for taxable returns, and ₹20 per day (₹10 + ₹10) for nil returns. Turnover-based caps apply. On top of late fees, interest at 18% per annum under Section 50 is levied on the net cash tax liability. Chronic non-filing can lead to GSTIN suspension, blocking of e-way bills, and loss of ITC for your recipients.
Use our GST Late Fee Calculator to instantly compute the exact penalty and interest owed for any delayed return, and our GST Interest Calculator for detailed interest workings under Section 50.