All GST filing deadlines for April 2026 in one place. GSTR-1, GSTR-3B, GSTR-9, TDS, TCS — never miss a deadline and avoid late fees.
April is one of the busiest months for GST compliance. It is the first month of the new financial year (FY 2026-27), which means filing the last returns of the previous year (March 2026) plus starting fresh for the new year. Miss a deadline and you pay Rs 50 per day in late fees — or Rs 20 for nil returns.
This calendar covers every GST deadline in April 2026 — from GSTR-1 for March to the annual return timeline. We update this page as the government issues any extensions or changes. Bookmark it and check back at the start of every month.
If you use myBillPlease, your GSTR-1 and GSTR-3B reports generate automatically from your invoices. Download them a few days before the deadline and file on the GST portal. No manual compilation needed. See our GSTR-1 filing guide and GSTR-3B filing guide for step-by-step instructions.
Complete list of all GST filing and payment deadlines
| Feature | Return / Payment | Due Date |
|---|---|---|
| GSTR-7 (TDS) — March 2026 | April 10, 2026 | |
| GSTR-8 (TCS by e-commerce operators) — March 2026 | April 10, 2026 | |
| GSTR-1 (Monthly filers) — March 2026 | April 11, 2026 | |
| GSTR-1 (QRMP — Q4 Jan-Mar 2026) | April 13, 2026 | |
| CMP-08 (Composition scheme) — Q4 Jan-Mar 2026 | April 18, 2026 | |
| GSTR-3B (Monthly filers) — March 2026 | April 20, 2026 | |
| GSTR-3B (QRMP Cat A states) — Q4 Jan-Mar 2026 | April 22, 2026 | |
| GSTR-3B (QRMP Cat B states) — Q4 Jan-Mar 2026 | April 24, 2026 | |
| PMT-06 (QRMP monthly tax) — April 2026 | April 25, 2026 | |
| ITC-04 (Job work) — Q4 Jan-Mar 2026 | April 25, 2026 | |
| GSTR-5 (Non-resident taxable persons) — March 2026 | April 20, 2026 | |
| GSTR-6 (ISD) — March 2026 | April 13, 2026 |
If your aggregate turnover exceeds Rs 5 crore, you must file GSTR-1 and GSTR-3B every month. For April 2026, here are your deadlines:
GSTR-1 for March 2026 — Due April 11. This is your last GSTR-1 of FY 2025-26. Ensure all March invoices, credit notes, and debit notes are included. The HSN summary in Table 12 is especially important for the year-end filing. myBillPlease generates this automatically from your invoice data — download Excel and upload to the portal.
GSTR-3B for March 2026 — Due April 20. Your final GSTR-3B of FY 2025-26. This is the last chance to claim any pending input tax credit for the financial year. ITC not claimed by the March GSTR-3B filing deadline must wait for amendment in the annual return. Reconcile your GSTR-2B carefully before filing.
Important year-end note: March GSTR-3B is your last opportunity to make adjustments for the financial year. Any ITC reversals under Rule 42/43, proportional credit corrections, and RCM reconciliation should be done in this return.
If you opted for the QRMP (Quarterly Return Monthly Payment) scheme, April is a filing month for your Q4 (January-March 2026) returns:
GSTR-1 for Q4 (Jan-Mar 2026) — Due April 13. This quarterly GSTR-1 covers all sales invoices from January, February, and March 2026. Since this is the final quarter of FY 2025-26, include any missed invoices from earlier months that you reported via IFF (Invoice Furnishing Facility) during Jan and Feb.
GSTR-3B for Q4 (Jan-Mar 2026) — Due April 22 or 24. The due date depends on your state — Category A states file by April 22, Category B states by April 24. Check which category your state falls under on the GST portal.
PMT-06 for April 2026 — Due April 25. Even though you file GSTR-3B quarterly, you must pay tax monthly. For April 2026 (first month of FY 2026-27), pay using PMT-06 by April 25. Calculate using either the fixed sum method (35% of last quarter's liability) or self-assessment method.
Don't forget these less common but equally important filings
If your business deducts TDS under GST (government departments, PSUs, certain entities), file GSTR-7 for March 2026 by April 10. Report all TDS deductions with deductee GSTIN and amounts.
E-commerce operators (Amazon, Flipkart, etc.) must file GSTR-8 reporting TCS collected from sellers during March 2026. Sellers see this data in their GSTR-2B for reconciliation.
Composition scheme dealers file CMP-08 for Q4 (Jan-Mar 2026). This is a simple challan-cum-statement showing total turnover and tax payable at the composition rate (1% for manufacturers, 5% for restaurants).
If you sent goods for job work during Q4, file ITC-04 reporting goods sent, received back, and any goods supplied from job worker premises. Required for job work ITC compliance.
Input Service Distributors must file GSTR-6 for March 2026, reporting how input tax credit was distributed across branches. Due by the 13th of the following month.
GSTR-9 (annual return) for FY 2025-26 is due by December 31, 2026. Start compiling data now — the March filings complete your yearly data. Reconcile sales, purchases, and ITC early.
Missing GST deadlines is expensive. Here is what you pay:
GSTR-1 late fee: Rs 50 per day (Rs 25 CGST + Rs 25 SGST), maximum Rs 10,000 per return. For nil returns: Rs 20 per day, maximum Rs 500.
GSTR-3B late fee: Same as GSTR-1 — Rs 50/day up to Rs 10,000. Plus, interest at 18% per annum on the unpaid tax amount from the due date to the actual payment date. On Rs 1 lakh tax paid 15 days late, interest is approximately Rs 739.
CMP-08 late fee: Rs 50 per day up to Rs 10,000 for regular returns, Rs 20 per day up to Rs 500 for nil.
Cascading impact: Late GSTR-1 filing blocks your customers from seeing your invoices in their GSTR-2B, which prevents them from claiming input tax credit. This strains B2B relationships. Late GSTR-3B prevents you from filing subsequent months — it cascades into a compliance backlog.
Set calendar reminders for the 8th (prepare data), 10th (file GSTR-1), and 18th (file GSTR-3B) of every month. Or use myBillPlease which generates both reports automatically from your invoices — so data is always ready days before the deadline.
April is the transition month between financial years. Here is what to do:
1. Reconcile FY 2025-26 data. Match your sales register with GSTR-1 filings for all 12 months. Match purchase register with GSTR-2B. Any discrepancies should be corrected in the March returns.
2. Claim all pending ITC. ITC for FY 2025-26 invoices must be claimed by November 30, 2026 or the annual return date — but claiming it in March/April is ideal. Don't leave ITC on the table.
3. Reset invoice series. Many businesses reset invoice numbers for the new financial year. In myBillPlease, update your invoice prefix to include the new FY (e.g., MBP/26-27/001). The system auto-increments from the new starting number.
4. Update GST rates. If any GST 2.0 rate changes apply to your products and you haven't updated them yet, do it now. New year, correct rates.
5. Review QRMP option. If your turnover changed and you want to switch between monthly and quarterly filing, the option is available on the GST portal at the start of each quarter. Evaluate which works better for your cash flow.
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