GST Return Due Dates 2026-27 — GSTR-1, GSTR-3B, GSTR-9 Calendar | CalcDesk.in

GST Return Due Dates 2025-26 — GSTR-1, GSTR-3B, GSTR-9 Calendar | CalcDesk

GST Return Due Dates 2025-26 — Complete Filing Calendar

📅 Updated July 2026 · ⏱ 7 min read

GST compliance requires filing multiple returns each month or quarter, with strict due dates. Missing a deadline — even by one day — triggers daily late fees of ₹20-₹200, and unpaid tax attracts 18% annual interest. This complete calendar covers all GST return due dates for FY 2025-26, with monthly tables for GSTR-1 and GSTR-3B, the QRMP scheme deadlines, and the GSTR-9 annual return.

GST Return Types — Quick Reference

ReturnWho FilesWhat It CoversFrequency
GSTR-1All regular taxpayersOutward supply details (sales invoices)Monthly or Quarterly (QRMP)
GSTR-3BAll regular taxpayersSummary return: ITC, tax payable, paidMonthly or Quarterly (QRMP)
GSTR-9Regular taxpayers (>₹2Cr turnover)Annual consolidated returnAnnual (by 31 Dec)
GSTR-9CTaxpayers with >₹5Cr turnoverReconciliation statementAnnual (by 31 Dec)
GSTR-4Composition scheme taxpayersQuarterly summary + annual returnAnnual (by 30 April)
GSTR-7TDS deductors under GSTTDS returnMonthly (10th)

GSTR-1 Monthly Due Dates — FY 2025-26

MonthGSTR-1 Due Date (Monthly Filers)
April 202511 May 2025
May 202511 June 2025
June 202511 July 2025
July 202511 August 2025
August 202511 September 2025
September 202511 October 2025
October 202511 November 2025
November 202511 December 2025
December 202511 January 2026
January 202611 February 2026
February 202611 March 2026
March 202611 April 2026

GSTR-3B Monthly Due Dates — FY 2025-26

MonthTurnover >₹5Cr (20th)QRMP Cat 1 States (22nd)QRMP Cat 2 States (24th)
April 202520 May 202522 May 202524 May 2025
May 202520 June 202522 June 202524 June 2025
June 202520 July 202522 July 202524 July 2025
September 202520 October 202522 October 202524 October 2025
December 202520 January 202622 January 202624 January 2026
March 202620 April 202622 April 202624 April 2026

QRMP filers pay tax via PMT-06 challan for months 1-2 of each quarter by the 25th. Full GSTR-3B filed for month 3 (June, September, December, March) by the 22nd/24th.

QRMP Scheme — Category 1 vs Category 2 States

Category 1 States (22nd deadline)Category 2 States (24th deadline)
Chhattisgarh, MP, Gujarat, Maharashtra, Karnataka, Goa, Kerala, TN, Telangana, AP, Rajasthan, UP, J&K, Ladakh, HPHimachal Pradesh (alternate), Punjab, Uttarakhand, Haryana, Delhi, Bihar, Sikkim, Arunachal Pradesh, Nagaland, Manipur, Mizoram, Tripura, Meghalaya, Assam, WB, Jharkhand, Odisha, Daman & Diu, Dadra & NH, Puducherry, Andaman & Nicobar

GSTR-9 Annual Return — Key Facts

  • Due date: 31 December 2026 for FY 2025-26
  • Who must file: Taxpayers with annual aggregate turnover above ₹2 crore
  • Who is exempt: Turnover up to ₹2 crore — filing optional; composition scheme dealers file GSTR-4
  • GSTR-9C: Self-certified reconciliation for taxpayers with turnover above ₹5 crore
  • Late fee: ₹200/day (₹100 CGST + ₹100 SGST), capped at 0.25% of annual turnover

💡 Compliance tip: File GSTR-1 before GSTR-3B every month — GSTR-1 supplies flow into your buyers’ GSTR-2B for ITC claims. Late GSTR-1 disrupts buyer’s ITC and creates downstream compliance issues. Set calendar reminders for the 10th (GSTR-1 prep) and 18th (GSTR-3B prep) of every month to ensure on-time filing.

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GST Calendar FY 2025-26 — Complete Month-by-Month Table

The table below consolidates all key GST return deadlines for FY 2025-26 in a single view. Monthly filers have turnover above ₹5 crore; QRMP filers have turnover up to ₹5 crore. IFF = Invoice Furnishing Facility (for QRMP filers to report large B2B invoices in months 1 and 2 of each quarter).

MonthGSTR-1 (Monthly, 11th)GSTR-1 / IFF (QRMP)GSTR-3B (Monthly, 20th)GSTR-3B (QRMP, 22nd/24th)
April 202511 May 202513 May 2025 (IFF)20 May 202522/24 May 2025
May 202511 June 202513 June 2025 (IFF)20 June 202522/24 June 2025
June 202511 July 202531 July 2025 (Q1 GSTR-1)20 July 202522/24 July 2025
July 202511 August 202513 August 2025 (IFF)20 August 202522/24 August 2025
August 202511 September 202513 September 2025 (IFF)20 September 202522/24 September 2025
September 202511 October 202531 October 2025 (Q2 GSTR-1)20 October 202522/24 October 2025
October 202511 November 202513 November 2025 (IFF)20 November 202522/24 November 2025
November 202511 December 202513 December 2025 (IFF)20 December 202522/24 December 2025
December 202511 January 202631 January 2026 (Q3 GSTR-1)20 January 202622/24 January 2026
January 202611 February 202613 February 2026 (IFF)20 February 202622/24 February 2026
February 202611 March 202613 March 2026 (IFF)20 March 202622/24 March 2026
March 202611 April 202630 April 2026 (Q4 GSTR-1)20 April 202622/24 April 2026

22nd deadline applies to Category 1 states (Maharashtra, Gujarat, Karnataka, TN, AP, Telangana, Kerala, MP, Chhattisgarh, Rajasthan, UP, Goa, J&K, Ladakh). 24th deadline applies to Category 2 states (Delhi, WB, Bihar, Odisha, Punjab, Haryana, Jharkhand, Uttarakhand, NE states, Andaman, Daman & Diu, Puducherry). QRMP filers pay tax for months 1–2 of each quarter via PMT-06 challan by the 25th — only the quarter-end month requires a full GSTR-3B.

What Happens When the GST Portal is Down on the Due Date

GSTN portal downtime near filing deadlines is a recurring reality. Knowing how to document it and what recourse exists can save you from paying late fees you do not owe.

GSTN’s official policy on downtime: When the portal is unavailable due to a technical failure on or near a due date, GSTN typically issues an advisory on its home page extending the deadline by 2–4 days. These advisories are also announced on the @askGST_GoI Twitter/X handle and on gstn.org.in. The extension is automatic — you do not need to apply separately.

How to document portal downtime yourself: Take screenshots of the error message (showing “Service Unavailable,” error codes, or login failure) with the timestamp clearly visible. Save these with date-stamped filenames. If a late fee is later levied despite the portal being down, these screenshots are your primary evidence in any appeal or condonation request.

💡 Condonation process if late fee is wrongly charged: File an application on the GST portal under “Grievance” section → describe the downtime, attach screenshots as evidence. Alternatively, approach your jurisdictional GST officer with a written application for condonation of delay. Many officers waive late fees when GSTN itself acknowledged downtime. Reference the GSTN advisory number (if one was issued) in your application for faster resolution.

📌 Best practice — file 2–3 days early: Portal load is highest in the last 2 days before any GST deadline. Login failures and slow response times are common. Filing by the 8th (for 11th deadline) and 17th (for 20th deadline) eliminates downtime risk entirely. For QRMP quarterly deadlines, file by the 28th of the quarter-end month. Set recurring calendar reminders 3 days before each deadline.

Frequently Asked Questions

Monthly filers (turnover >₹5Cr): 20th of following month. QRMP scheme Category 1 states: 22nd. Category 2 states: 24th. For example, June 2025 GSTR-3B: regular filers by 20 July, QRMP Q1 filers by 22 or 24 July 2025.
Monthly filers: 11th of following month. QRMP scheme: quarterly by 13th of month following quarter end (13 July, 13 October, 13 January, 13 April). QRMP taxpayers must also file IFF (Invoice Furnishing Facility) by 13th for months 1 and 2 of each quarter for large B2B invoices.
31 December 2026. GSTR-9C (reconciliation) also due 31 December 2026 for taxpayers with turnover above ₹5 crore. Taxpayers with turnover ≤₹2 crore are exempt (filing optional). Late fee: ₹200/day capped at 0.25% of annual turnover.
QRMP (Quarterly Return Monthly Payment): for taxpayers with annual aggregate turnover ≤₹5 crore. File GSTR-1 and GSTR-3B quarterly (8 returns/year instead of 24). Pay tax monthly via PMT-06 challan for months 1-2 of each quarter. Reduces compliance burden significantly for smaller businesses.
Late fee: ₹50/day for GSTR-1 and GSTR-3B (₹20/day for nil returns), capped at ₹10,000 per return. Interest: 18% per annum on unpaid tax from the due date. Both apply simultaneously if you’re late on both filing and payment. File the return immediately even if you cannot pay — stops the late fee from accumulating.
⚠️ Disclaimer: For educational purposes only. Rules subject to change. Full disclaimer.

GSTR-2B — Understanding Your Automatic ITC Statement

GSTR-2B is the auto-generated Input Tax Credit (ITC) statement that shows all ITC available to you based on your suppliers’ GSTR-1 filings. Understanding it helps avoid ITC mismatches:

  • Generated on: 14th of every month (reflects all supplier GSTR-1 filed by 13th of that month)
  • What it shows: All invoices your suppliers have uploaded in their GSTR-1 that are addressed to your GSTIN — the ITC you can legally claim
  • What’s NOT in GSTR-2B: Invoices from suppliers who filed late GSTR-1 (after the 13th) don’t appear until next month’s GSTR-2B
  • Reconcile before GSTR-3B: Always reconcile your purchase register against GSTR-2B before claiming ITC in GSTR-3B. ITC claimed in 3B but absent from GSTR-2B can be challenged during scrutiny
  • Rule 36(4): ITC can only be claimed to the extent it appears in GSTR-2B. If your supplier hasn’t filed, you cannot claim that ITC in GSTR-3B — you must follow up with your supplier to file their GSTR-1

Consequences of Not Filing GST Returns

Duration of Non-FilingConsequence
1-30 daysLate fee accumulates; portal access restricted for next period filing
2+ consecutive months (GSTR-3B)E-way bill generation blocked
6+ monthsGST registration liable to be suspended by tax authorities
1+ year or persistent defaultShow Cause Notice for cancellation of GST registration
Cancelled registrationCannot issue valid GST invoices; buyers cannot claim ITC from your invoices

GST Annual Return — GSTR-9 Filing Guide

GSTR-9 reconciles the entire year’s GST activity — it’s the annual summary and any unreported transactions or ITC adjustments should be captured here:

  • Who files: Taxpayers with annual aggregate turnover above ₹2 crore (voluntary for ≤₹2 crore)
  • Data it requires: Monthly summary of outward and inward supplies, ITC availed vs ITC as per GSTR-2B, tax paid, refunds claimed, demands and orders
  • Key reconciliations to do before filing: (1) Outward supply per GSTR-1 vs books — should match; (2) ITC per GSTR-3B vs GSTR-2B — explain any excess or shortfall; (3) Tax paid in GSTR-3B vs Electronic Tax Liability Register — confirm no gaps
  • Common GSTR-9 errors: Incorrectly claiming amendments from previous year in current year; ITC reversal amounts entered incorrectly; HSN summary not matching GSTR-1 data

How to Avoid Last-Minute GST Filing Rush

  • Reconcile GSTR-1 vs books monthly — don’t accumulate 12 months of reconciliation for year-end. Monthly reconciliation takes 30 minutes; year-end takes days
  • Maintain a GST compliance calendar — export all due dates to your calendar app with 3-day advance reminders
  • Set up auto-payment for GSTR-3B from your Electronic Cash Ledger — ensure the ledger has adequate balance by the 18th of each month to enable timely filing
  • Keep supplier communication active: Chase suppliers who haven’t filed GSTR-1 by the 12th — their late filing delays your GSTR-2B and ITC claims

QRMP Scheme — Complete Guide for Small Businesses

The QRMP (Quarterly Return Monthly Payment) scheme was introduced to reduce the compliance burden for small GST taxpayers. Here’s everything you need to know to decide if it’s right for your business:

Who Should Use QRMP?

  • Businesses with annual aggregate turnover up to ₹5 crore in the previous financial year
  • Businesses with predominantly B2C transactions (retail, small services) — where buyers don’t urgently need your GSTR-1 data for ITC claims
  • Businesses where the owner or accountant handles GST compliance personally and filing 24 returns per year (12 GSTR-1 + 12 GSTR-3B) is burdensome

Who Should Stay on Monthly Filing?

  • Businesses with significant B2B sales — your buyers depend on your monthly GSTR-1 for their GSTR-2B and ITC claims. Quarterly GSTR-1 delays their ITC by 2-3 months each quarter
  • Businesses with turnovers between ₹2-5 crore that are growing — once you cross ₹5 crore, you’re automatically moved to monthly filing anyway
  • Businesses where cash flow management requires precise monthly ITC availability

QRMP Monthly Payment — PMT-06 Challan

Under QRMP, you still pay tax monthly (months 1 and 2 of each quarter) via PMT-06 challan. Two methods are available:

  1. Fixed Sum Method: Pay 35% of the previous quarter’s tax liability (automatically calculated by the portal) — simpler but may result in over/under payment
  2. Self-Assessment Method: Calculate actual tax liability for the month based on your books and pay that amount — more accurate, avoids over/under payment

📌 QRMP enrolment: Opt in or out of QRMP scheme on the GST portal under Services → Returns → Opt-in for Quarterly Return. The deadline to opt in for a quarter is the last day of the first month of that quarter. For Q2 (July-September), opt in by 31 July. Changes take effect from the next quarter.

GST Portal Downtime — What to Do When Filing is Impossible

The GSTN portal occasionally experiences downtime, especially near filing deadlines. If you cannot file due to portal issues:

  • Take a screenshot of the error message with timestamp — this is your evidence of attempted filing
  • Check GSTN’s official Twitter/X handle (@askGST_GoI) for downtime announcements — the department sometimes extends deadlines when portal issues are widespread
  • File the return as soon as the portal is restored — late fee calculation considers the actual filing date, not the deadline
  • If the portal was down on the deadline day and you can prove attempted filing (screenshot, GSTN’s own acknowledgment of downtime), you can petition for late fee waiver through your jurisdictional GST officer

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