GST Return Due Date Calendar
- About This GST Due Date Calendar
- How to Use This GST Return Due Date Checker
- GST Return Types and Their Due Dates in 2026
- Monthly GST Due Date Calendar for 2026
- Late Filing Consequences, Fees, and Interest
- Tips for Staying on Top of GST Deadlines
- How Legalxindia Helps with GST Compliance
- Frequently Asked Questions
About This GST Return Due Date Calendar
Missing a GST deadline in India isn’t just inconvenient. It costs money, blocks input tax credit for your buyers, and can trigger notices from the department. This free GST return due date calendar, built by Legalxindia’s team of tax compliance experts, helps businesses, accountants, and tax professionals track every filing deadline in one place.
Use this tool to check GSTR-1, GSTR-3B, GSTR-4, GSTR-9, and GSTR-9C due dates for 2026. Select your return type and filing frequency to see the exact date you need to file.
What This Tool Does
The calendar shows due dates by return type, filing category, and month. You’ll see whether a deadline falls on a weekend or holiday and what the adjusted date is. No more guessing or hunting through government circulars.
Who Should Use It
This tool is built for:
- GST-registered business owners who file their own returns
- Chartered accountants managing multiple client accounts
- Tax consultants tracking deadlines across different filing frequencies
- Finance teams at mid-size companies staying compliant
- Composition dealers who file quarterly under GSTR-4
Basically, if you’re registered under GST in India, this calendar is for you.
How to Use This GST Return Due Date Checker
Step-by-Step Instructions
Using the tool is simple. Here’s what to do:
- Select your return typefrom the dropdown: GSTR-1, GSTR-3B, GSTR-4, GSTR-9, or GSTR-9C
- Choose your filing frequency: monthly or quarterly (QRMP scheme)
- Pick the month or periodyou want to check
- Hit “Check Due Date”and the calendar will show your deadline
- Set a reminderdirectly from the result screen
That’s it. The tool instantly pulls up the relevant due date for 2026 based on your inputs.
Example Scenarios
Say you’re a monthly filer. You want to know when GSTR-3B is due for March 2026. Select GSTR-3B, choose “monthly,” select March 2026, and the tool shows you April 20, 2026.
Or say you’re under the QRMP scheme for the quarter January to March 2026. Select GSTR-3B, choose “quarterly (QRMP),” pick Q4, and the tool shows April 22, 2026 as your due date.
Pro tip: Run the check at the start of each month and add the deadline to your phone calendar. Takes two minutes and saves you from a last-minute scramble.
GST Return Types and Their Due Dates in 2026
Different businesses file different returns depending on their turnover, registration type, and scheme opted. Here’s a breakdown of each return and when it’s due in 2026.
GSTR-1 Monthly and Quarterly Due Dates
GSTR-1 is the outward supply statement. You report all sales invoices here. Monthly filers with turnover above ₹5 crore must file by the 11th of the following month. Quarterly filers under the QRMP scheme file by the 13th of the month following the quarter end.
GSTR-3B Monthly and Quarterly QRMP Due Dates
GSTR-3B is the monthly summary return where you declare total sales, input tax credit, and net tax payable. Monthly filers with turnover above ₹5 crore file by the 20th. QRMP scheme filers have staggered due dates based on their state category.
For pricing and packages, please contact usfor a custom quote.
Keep in mind: even if you’re a quarterly filer under QRMP, you still need to pay tax monthly through the “Pay Tax” facility (PMT-06) by the 25th of each month within the quarter.
GSTR-4 for Composition Dealers
Composition scheme dealers file GSTR-4 annually. It covers the full financial year and is due by April 30th each year. For the financial year 2025-26, the due date is April 30, 2026.
Composition dealers also need to file CMP-08 (quarterly statement for tax payment) by the 18th of the month following each quarter.
GSTR-9 and GSTR-9C Annual Returns
GSTR-9 is the annual return filed by all regular GST taxpayers. GSTR-9C is the reconciliation statement, required for taxpayers with turnover above ₹5 crore, and it needs to be certified by a CA or CMA.
For pricing and packages, please contact usfor a custom quote.
Monthly GST Due Date Calendar for 2026
Here’s your month-by-month view of all major GST deadlines in 2026. Bookmark this page or share it with your accounting team.
For pricing and packages, please contact usfor a custom quote.
Note: If any due date falls on a Sunday or public holiday, the next working day becomes the effective deadline. Always verify final dates on the GST portal or with your tax consultant.
Late Filing Consequences, Fees, and Interest
Filing late isn’t just a minor slip. The penalties add up fast, and in some cases, they block your buyers from claiming input tax credit. Here’s what you’re looking at if you miss a deadline.
Late Fees for GSTR-1 and GSTR-3B
The GST Act prescribes late fees per day of delay, split between CGST and SGST:
For pricing and packages, please contact usfor a custom quote.
Honestly, ₹50 per day might not sound like much, but across 10 clients and 3 missed months, that’s ₹45,000 in avoidable fees. Not great.
Interest on Late Tax Payment
Beyond late fees, interest at 18% per annum applies on any unpaid or short-paid tax. It’s calculated from the due date to the actual date of payment, and it’s not waivable in most cases.
For GSTR-3B, if you file on time but your actual tax liability turns out higher than what you declared, the differential amount attracts interest from the original due date.
Impact on Input Tax Credit
Here’s the part most businesses overlook. If you don’t file GSTR-1 on time, your buyers can’t see the invoices you’ve raised in their GSTR-2B auto-drafted statement. That means they can’t claim ITC on purchases from you until you file. Your clients will not be happy about that.
Late GSTR-3B filing can also lead to suspension of your GSTIN in cases of repeated non-compliance.
Tips for Staying on Top of GST Deadlines
Getting organized is half the battle. These tips come straight from experienced tax professionals who manage dozens of GST filings every month.
- Set calendar reminders 5 days before each due date.Don’t wait for the deadline day itself. Portals get slow and crash near deadlines.
- Reconcile your purchase register weekly.Monthly reconciliation right before filing creates last-minute chaos.
- Check GSTR-2B by the 14th of each month.This gives you time to chase missing invoices before your GSTR-3B is due on the 20th.
- Keep a dedicated folder for each month’s invoices.Digital or physical, consistency saves time during filing.
- Don’t ignore nil returns.If you had no transactions in a month, you still need to file. The late fee still applies.
- Track your annual turnover regularly.Crossing ₹5 crore means switching from quarterly to monthly filing. Missing this shift can cause compliance issues.
- Use Legalxindia’s GST compliance serviceif you’d rather not track this yourself. Their team handles filing, reminders, and reconciliation so nothing slips through.
Pro tip: Save this page as a bookmark and check back at the start of each quarter. Due dates occasionally shift when government circulars extend them.
How Legalxindia Helps with GST Compliance
Tracking due dates manually works when you’re handling one entity, but most accountants and business owners are juggling multiple returns, reconciliations, and client accounts simultaneously. That’s where Legalxindia comes in.
Legalxindia’s GST compliance team handles the full filing cycle for registered businesses across India. Here’s what that includes:
- GSTR-1 and GSTR-3B filing (monthly and quarterly)
- GSTR-9 and GSTR-9C annual return preparation
- ITC reconciliation against GSTR-2B
- Composition dealer filings (GSTR-4 and CMP-08)
- Deadline reminders and status tracking
- Handling GST notices and department queries
Their professionals are updated on the latest circulars, notifications, and due date extensions issued by the GST Council. You won’t have to check government portals every week. They do that for you.
Bottom line: if missing a GST deadline costs your business in late fees, lost ITC, or client relationships, getting professional help isn’t an expense. It’s an investment that pays for itself quickly.
Contact Legalxindia to discuss GST compliance support for your business or practice.
Frequently Asked Questions
Q1. What is the due date for GSTR-3B for monthly filers in 2026?
Monthly filers with turnover above ₹5 crore must file GSTR-3B by the 20th of the following month. So for January 2026, the due date is February 20, 2026.
Q2. What happens if GSTR-1 isn’t filed on time?
A late fee of ₹50 per day applies for non-nil returns and ₹20 per day for nil returns. Plus, your buyers won’t see your invoices in their GSTR-2B, which blocks their input tax credit. That’s a direct problem for your client relationships.
Q3. Who needs to file GSTR-9C in 2026?
Taxpayers with aggregate annual turnover above ₹5 crore in FY 2025-26 need to file GSTR-9C along with GSTR-9. The due date for both is December 31, 2026.
Q4. What is the QRMP scheme and who’s eligible?
The QRMP scheme lets taxpayers with turnover up to ₹5 crore file GSTR-1 and GSTR-3B quarterly instead of monthly. They still pay tax monthly through the PMT-06 challan by the 25th of each month within the quarter.
Q5. What is the due date for GSTR-4 in 2026?
Composition dealers must file GSTR-4 for FY 2025-26 by April 30, 2026. They also need to file CMP-08 quarterly by the 18th of the month following each quarter.
Q6. Is interest charged even if GSTR-3B is filed on time but tax was underpaid?
Yes. Interest at 18% per annum applies on the differential tax amount from the original due date to the date of actual payment. Filing on time doesn’t protect you from interest if there’s a tax shortfall.
Q7. Can due dates change from what’s shown here?
Yes, they can. The government sometimes extends due dates through notifications and circulars, especially during technical glitches or national events. Always cross-check the GST portal or consult a tax professional before assuming a deadline has shifted.
Q8. What is the maximum late fee for GSTR-9?
The late fee for GSTR-9 is ₹200 per day, subject to a maximum of 0.25% of the taxpayer’s turnover in the state or union territory. For large businesses, this cap matters a lot.
Q9. Do nil filers still need to pay late fees?
Yes. Even if you had zero transactions in a period, you must file a nil return. The late fee for nil GSTR-1 or GSTR-3B is ₹20 per day, capped at ₹500 per return. It’s small but avoidable.
Q10. How can Legalxindia help with GST filing?
Legalxindia offers end-to-end GST compliance support including GSTR-1, GSTR-3B, GSTR-4, GSTR-9, and GSTR-9C filing. Their team tracks due dates, reconciles ITC, and handles department notices. Reach out to Legalxindia directly to get started with managed GST compliance for your business or your clients.