GST GSTR-3B Filing Deadline Extended for March 2026
The deadline to file your March 2026 GSTR-3B return has been extended to April 21, 2026.
- Document
- Central Tax 01/2026-Central Tax
- Dated
- 21 Apr 2026
- Effective
- 20th day of April, 2026
- Act by
- April 21, 2026
This page was written by Patron Accounting’s AI from the official release and reviewed before publishing. It explains the document in plain language. It is not the document itself. Where this page and the original differ, the original governs.
The short version
- The new due date for filing GSTR-3B is April 21, 2026.
- This extension applies specifically to the tax return for March 2026.
- You must complete your filing by this date to avoid late fees.
In short
This notification from the Central Board of Indirect Taxes and Customs officially pushes back the deadline for filing your GSTR-3B return for March 2026.
What has changed
How it worked before
Previously, the deadline for filing this monthly return was set for an earlier date in April 2026.
What has changed
The government has granted an extension, moving the final date for submission to April 21, 2026.
Who this affects
This applies to all businesses and individuals registered under GST who are required to file monthly GSTR-3B returns.
An example
If you run a small retail shop, you usually file your GSTR-3B by the standard monthly deadline. Because of this notification, you now have until April 21, 2026, to submit your March 2026 return without facing any late filing penalties.
What you should do
Ensure your GSTR-3B return for March 2026 is submitted through the GST portal by April 21, 2026.
Deadline · April 21, 2026If you do nothing
If you fail to file your return by the new deadline of April 21, 2026, you will be liable for late fees. You may also face interest charges on any tax that remains unpaid after the original due date.
The terms explained
- GSTR-3B
- A monthly summary return where businesses report their total sales and tax paid.
- GST
- Goods and Services Tax, the main tax on the supply of goods and services.
- Registered person
- Any business or individual who has obtained a GST identification number.
The original document
| Issued by | GST |
|---|---|
| Document | Central Tax 01/2026-Central Tax |
| Full title | Seeks to extends the due date for furnishing the return in FORM GSTR-3B for the month of March, 2026 till the twenty-first day of April, 2026 |
| Issued on | 21 April 2026 |
| Effective | 20th day of April, 2026 |
About Patron Accounting LLP
Patron Accounting LLP is a CA and CS-led accounting and compliance firm that has been working with businesses across India since 2019. We handle the work that keeps a company correct with every department it answers to: day-to-day bookkeeping and accounting, GST registration and returns, income tax filing and assessments, TDS, payroll and PF/ESI, company and LLP incorporation, ROC and MCA compliance, statutory and internal audit, physical stock and inventory audits, trademark and other registrations, and the certificates and reports that banks, buyers and regulators ask for.
Our clients range from a first proprietorship registering for GST to established companies running operations across several states. Much of our work is exactly this: reading what a department has published and telling a business, in plain terms, whether it changes anything for them.
We operate from five offices and serve clients across the rest of India remotely:
- Pune (HQ): RTC Silver, B4-708, Sai Satyam Park, Wagholi, Pune, Maharashtra 412207
- Mumbai: 104, Rajshila Building, 597 J.S.S. Road, Marine Lines, Mumbai 400002
- Delhi: 3rd Floor, B-6/154-155, Sector 5, Rohini, Delhi 110085
- Gurugram: Pioneer Urban Square, B109, Golf Course Ext Road, Sector 62, Gurugram 122098
- Ahmedabad: Phoenix Tower, 1107, near Commerce Six Road, Drive In Road, Navrangpura, Ahmedabad, Gujarat 380009
If anything on this page affects you and you would like somebody to look at your own position, we are glad to help. Call +91 94594 56700, write to sales@patronaccounting.com, or visit patronaccounting.com. The first conversation costs nothing.