GSTR-3B: Due Date, Late Fee, Format, Return Filing, Eligibility, Rules

• A separate GSTR-3B must be filed for every GSTIN
• The GST liability must be paid on or before the date of filing GSTR-3B, earlier of its due date
• The GSTR-3B once filed cannot be revised
• Even in case of a zero liability, GSTR-3B must be compulsorily filed

Note: The government implemented hard locking of auto-populated liability in GSTR-3B from the July 2025 tax period onwards (filed in August 2025).

GSTN has given a new advisory on reporting in Table 3.2 of GSTR-3B dated 5 December 2025. From November 2025 tax period, auto-populated values in Table 3.2 (inter-state supplies to unregistered persons, composition taxpayers, UIN holders) from GSTR-1/1A/IFF become non-editable in GSTR-3B and filing must use system-generated values only.

Rectification: Amend via GSTR-1A for the same period (updates Table 3.2 instantly before GSTR-3B filing) or through subsequent GSTR-1/IFF filings. No cut-off for GSTR-1A before GSTR-3B submission.

Best Practice: Report accurately in GSTR-1/1A/IFF upfront and review drafts to avoid amendments.

Who should File GSTR 3B?

Every person who is registered under GST must file GSTR-3B.

However, the following registrants do not have to file GSTR-3B

• Taxpayers registered under the Composition Scheme
• Input service distributors
• Non-resident suppliers of OIDAR service
• Non-resident taxable persons

GSTR-3B Due Dates

The GSTR-3B due date is the 20th of the following month. However, a quarterly GSTR-3B must be filed by the 22nd or 24th of the month following the quarter, depending on the state or UT that the business is operating. Taxpayers cannot file their GSTR-3B after the expiry of a period of three years from the due date of furnishing of such tax period's GSTR-3B from the July 2025 tax period onwards.

• Up to December 2019: The due date is 20th of the subsequent month
• January 2020 onwards: The due dates have been staggered. It is either 20th of every month or 22nd/24th of the month following every quarter, for monthly and quarterly filers (as provided in the below image)*
• Taxpayers opting for the QRMP scheme from 1st January 2021: The due date is 22nd or 24th of the month following every quarter, as per the State/UT of the principal place of business (list of States/UT given in the image).

*To know about the current due dates for GSTR-3B, visit our page on GST Calendar

The following are essential points to note:

• Taxpayers must ensure to pay taxes and file GSTR-3B within the deadline.
• The late filing of GSTR-3B attracts a late fee and interest at 18% per annum.
• In case the tax was paid within the due date but the GSTR-3B was filed after the deadline, both late fees and interest will apply.
• Taxpayers those not opted for the QRMP Scheme must file GSTR-3B every month.

Late Fee & Penalty for GSTR-3B

A late fee is charged for filing GSTR-3B of a tax period after the due date. It is levied as follows:

• Rs. 50 per day of delay
• Rs. 20 per day of delay for taxpayers having nil tax liability for the month

In case the GST dues are not paid within the due date, interest at 18% per annum is payable on the amount of outstanding tax to be paid.

GSTR-3B vs GSTR-2A & GSTR-2B: Comparison

Reconciliation of GSTR-2A (real-time update of ITC) and GSTR-2B (ITC statement for the month) with GSTR-3B is needed to:

• Avoid notices due to excess input tax credit claims in GSTR-3B
• Be informed if any genuine input tax credit is missed out on
• Nudge the supplier to upload the invoice details in the GSTR-1, if not uploaded
• Stay GST compliant and improve the GST compliance rating!

Know more about GSTR-2B to reconcile & claim accurate ITC before filing GSTR-3B

Read more on how to compare GSTR-3B vs GSTR-2A easily!

• Avoid interest & penalties due to the short payment of tax
• Know if any invoice is missed out on or duplicated
• Allow the recipient to claim an accurate input tax credit based on his GSTR-2A & GSTR-2B
• Stay GST compliant and improve the GST compliance rating!

Read more on how to compare GSTR-3B vs GSTR-1 easily!

How to File GSTR-3B on Clear GST Software?

The advanced Clear GST solution provides an end-to-end filing of GSTR-3B at a PAN level across multiple GSTINs. It also provides its users with a smart error correction UI at every stage - upon importing of data, reconciliation/review, uploading prepared data onto the GSTN, and filing with the GSTN, for a quick, hassle-free, and accurate GSTR-3B filing experience.

With the advanced, enterprise-grade ClearGST solution, you can ensure a notice-free and compliant business! Here’re some exclusive features for GSTR-3B you must not miss exploring on the platform-

• PAN-level, end-to-end GSTR-3B filing reduces time spent on filing by over 70%.
• Enjoy a single file import of all docs for preparing sales and purchase data.
• Proactively address errors with our smart error correction on UI, such as the ingestion duplicate warning layer, mismatch in tax rate vs tax amount, and invalid customer GSTINs.
• Pre-upload GSTR-3B validations such as GSTR-1 vs GSTR-3B validation, past GSTR-3B validation, and GSTR-2B vs purchase reconciliation checks.
• Comprehensive reporting dashboard for GSTR-1 vs GSTR-3B vs SR & GSTR-2B vs GSTR-3B vs PR.
• Claim only accurate ITC with Table 4 automation as per the latest GSTR-3B and ITC claim norms.

Below is an overview of steps to file GSTR-3B on Clear GST solution-