gstr 3b due date

29 June 2026

GST Filing Deadlines and Penalty Rules: What You Need to Know

Tracking GST deadlines gets complicated fast. You've got monthly filing cycles, different rules for different business types, penalties that start accruing immediately if you miss them, and constant rumors about extensions that may or may not be real. Getting it wrong costs money. Getting it right just requires knowing where the dates are and what they mean.

GSTR-3B Due Dates:

GSTR-3B is your consolidated return. It covers your total sales, the input tax credit you're claiming, and what you actually owe. The filing deadline depends on how often you file:

Monthly filers: 20th of the following month
QRMP scheme (quarterly): 22nd or 24th of the following month (depends on your state)

That's it. No flexibility. The 21st is late.

June 2026 Deadlines

Since GST returns cover the prior month's activity, your June 2026 operations get reported in July:

Monthly filers: July 20, 2026
Quarterly filers (April–June quarter): July 22 or 24, 2026

Are Extensions Ever Actually Given?

People ask this constantly, usually after a portal crash or some panic on social media. The answer is almost never. The government doesn't extend deadlines for technical issues or for you individually. If a widespread crisis happens—a major earthquake, a complete platform failure lasting days—they might announce something formally. But you'll see it on the official GST portal and in a government notification. Random posts online are not proof of an extension. Treat rumors of extensions the way you'd treat rumors of lottery wins.

GSTR-1 vs. GSTR-3B: What's the Difference?

These get mixed up constantly, so here's the distinction:

GSTR-1 is your detailed invoice register. Line by line, every sale. You file it first. No tax payment here—it's pure reporting.

GSTR-3B is the summary. It pulls together your total sales from GSTR-1, whatever input tax credit you're claiming, and calculates what you owe. The tax actually gets paid when you file this one.

Late Filing Penalties: How Much They Cost

Miss the due date and the penalties start the day after. Section 47 doesn't mess around.

Standard return: ₹50 per day (₹25 CGST + ₹25 SGST)
Nil return (no sales): ₹20 per day (₹10 CGST + ₹10 SGST)
Interest on outstanding tax: 18% per annum

One thing that catches people: you can't use input tax credit to pay the penalty. It has to come out of your cash ledger. A penalty that runs for 30 days costs ₹1,500 minimum, plus whatever interest accrues on your actual tax liability. It adds up.

Your GSTR-3B Filing Checklist

Before you hit submit, go through this:

Reconcile your sales. Your total sales in GSTR-3B should match what you reported in GSTR-1. If they don't, you've got a data entry problem to fix.

Check your ITC. Your claimed input tax credit needs to match what auto-populated from GSTR-2B. If you claim more than what's in 2B, you'll get a notice and likely have to reverse it.

Account for reverse charge. If you owe any RCM (reverse charge mechanism) on things like freight or professional services, that goes in here.

Fund your ledger. Make sure you actually have enough money in your electronic cash ledger to pay whatever you owe. Running short means a late payment.

Once you file, you can check the status by logging into the GST portal, going to Services > Returns > Track Return Status, and entering your ARN (the application reference number they give you). That confirms it went through.

GST Registration: The 30-Day Deadline

If you're new to GST, the first deadline comes before you ever file a return. You have 30 days from the date your turnover crosses the registration threshold (usually ₹20 lakh or ₹40 lakh depending on your state and business type) to apply for GSTIN.

Miss that? The penalty is ₹10,000 or 10% of the tax due, whichever is higher. And you haven't even filed a return yet.

FAQs

1. What is the GSTR-3B due date for June 2026?

For monthly taxpayers, the GSTR-3B due date for June 2026 is 20 July 2026. QRMP taxpayers must file by 22 or 24 July 2026, depending on their state.

2. Has the GSTR-3B due date been extended?

As of now, there is no official extension for the GSTR-3B due date. Always verify extension notifications on the official GST Portal or CBIC website.

3. What is the penalty for late filing of GSTR-3B?

Late filing attracts:

₹50 per day (₹25 CGST + ₹25 SGST) for normal returns
₹20 per day for Nil returns
18% annual interest on unpaid tax

4. What is the difference between GSTR-1 and GSTR-3B?

GSTR-1 contains detailed sales invoices, while GSTR-3B is a summary return used for reporting tax liability and making GST payments.

5. Can I revise my GSTR-3B after filing?

No. GSTR-3B cannot be revised after submission. Any corrections must be made in a subsequent GST return.

6. How can I check my GSTR-3B filing status?

7. What should I check before filing GSTR-3B?

Before filing:

Reconcile GSTR-1 with GSTR-3B
Verify Input Tax Credit (ITC) with GSTR-2B
Report Reverse Charge Mechanism (RCM), if applicable
Ensure sufficient balance in your electronic cash ledger

8. What is the GST registration deadline in 2026?

Businesses generally must apply for GST registration within 30 days of becoming liable for registration after crossing the applicable turnover threshold.

9. Is there a penalty for delayed GST registration?

Yes. Failure to register when required may result in a penalty of ₹10,000 or 10% of the tax due, whichever is higher, subject to applicable GST provisions.

10. Where can I find official GST filing notifications?

Official GST filing notifications, due date updates, and circulars are published on the GST Portal and the CBIC website.