GST Compliance Calendar 2025: Key Due Dates to Remember

When it comes to maintaining smooth business operations and staying on the right side of the law, GST compliance is a priority every taxpayer in India must take seriously. Among the various filings under the Goods and Services Tax regime, GSTR 1 and GSTR 3B due dates play a critical role. Missing these deadlines can lead to penalties, interest, and unwanted compliance hassles.

In this blog, we present a comprehensive GST compliance calendar for 2025, helping you stay updated on all the important dates—especially those concerning GSTR 1 and GSTR 3B due dates.

Why Is GST Compliance Important?

Timely GST return filing ensures:

• Seamless input tax credit flow

• Avoidance of late fees and penalties

• Improved business reputation and creditworthiness

• Legal compliance under GST laws

One of the most common pitfalls businesses face is missing GSTR 1 and GSTR 3B due dates, which can cause a ripple effect, including delayed ITC for your clients and penalties from the tax department.

GSTR 1 and GSTR 3B: A Quick Refresher

Before diving into the calendar, let’s briefly go over what these forms are:

• GSTR-1: A monthly or quarterly return that contains details of all outward supplies (sales) made during a particular period.

• GSTR-3B: A monthly summary return through which businesses report their GST liabilities and claim ITC.

Keeping track of GSTR 1 and GSTR 3B due dates helps businesses remain compliant and avoid accumulating dues.

Monthly GSTR 1 and GSTR 3B Due Dates for 2025

Below is a tentative calendar for businesses filing returns monthly. These dates are based on the recurring due dates and may be subject to revision by GST authorities.

As seen above, both GSTR 1 and GSTR 3B due dates follow a fixed pattern—usually the 11th and 20th of the month following the tax period, respectively.

Quarterly Filers (QRMP Scheme)

For small taxpayers (turnover up to ₹5 crore), returns can be filed quarterly under the QRMP scheme. However, GSTR-3B must still be filed every quarter, while GSTR-1 can be filed quarterly or monthly through the Invoice Furnishing Facility (IFF).

*Depending on the state of the taxpayer.

For those under the QRMP scheme, keeping track of GSTR 1 and GSTR 3B due dates on a quarterly basis is just as essential.

Common Pitfalls to Avoid

1. Last-minute filings: Waiting till the deadline often results in portal glitches and errors.

2. Mismatch in GSTR-1 and GSTR-3B: Discrepancies can delay ITC and attract scrutiny.

3. Not filing NIL returns: Even if there are no transactions, returns must be filed.

4. Missed amendments: Changes in invoices should be incorporated before the financial year ends.

All these issues are preventable by being consistent with GSTR 1 and GSTR 3B due dates.

Tips to Stay GST Compliant in 2025

• Set calendar reminders for every GSTR 1 and GSTR 3B due date.

• Automate filing with GST software or accounting tools.

• Regularly reconcile sales and purchase data.

• Conduct internal GST audits at least twice a year.

• Subscribe to GST updates for changes in due dates.

What Happens If You Miss the Due Dates?

Missing GSTR 1 and GSTR 3B due dates can lead to:

• Late fees (₹50/day for regular returns, ₹20/day for NIL returns)

• Interest at 18% p.a. on delayed tax payment

• Blocking of e-way bill generation

• Loss of goodwill and possible scrutiny from tax authorities

Timely filing is not just a regulatory necessity—it’s a strategic business habit.

Conclusion

The GST compliance calendar for 2025 is your best friend when it comes to staying ahead of deadlines and avoiding penalties. Staying on top of GSTR 1 and GSTR 3B due dates is not just about fulfilling tax obligations—it reflects well-managed finances and smooth business operations.

Make 2025 your most compliant year yet by planning ahead and treating these due dates with the seriousness they deserve.