Rule 37A: reversal where your supplier did not file its GSTR-3B
A rule that makes your credit depend on someone else's return. It has a deadline, and the deadline is not negotiable.
Rule 37A requires a recipient to reverse credit availed on an invoice where the supplier furnished the details in GSTR-1 but did not file the return in GSTR-3B for that period by the thirtieth of September following the end of the financial year in which the credit was availed. The reversal must be made on or before the thirtieth of November of that year. If the reversal is not made by then, the amount is payable with interest. Credit may be re availed when the supplier subsequently files the return.
The mechanism, in dates
The invoice appears in your GSTR-2B because the supplier filed GSTR-1. You avail the credit. The supplier does not file GSTR-3B for that period.
If the supplier has still not filed by the thirtieth of September following the end of that financial year, you must reverse the credit on or before the thirtieth of November of that year.
If you reverse by that date, no interest arises. If you do not, the amount is payable along with interest under Section 50.
When the supplier eventually files, you re avail. Re availment is expressly permitted and is not subject to the Section 16(4) date.
Why this rule is more useful than it looks
Rule 37A is the department's own answer to the vicarious recovery problem. It provides a specific mechanism, with a specific date and a specific consequence, for exactly the situation covered by Section 16(2)(c).
That gives a taxpayer a strong argument in a 16(2)(c) demand: where the legislature has prescribed a mechanism for non filing by the supplier, a demand outside that mechanism, with penalty, is inconsistent with the scheme.
It also gives a control point. The information required — which suppliers have filed GSTR-1 but not GSTR-3B — is available on the portal, so the exposure is knowable in advance rather than discovered in an audit.
The practical control
Extract the filing status of your suppliers each quarter and maintain a watch list of those with a GSTR-1 to GSTR-3B gap.
For each watch list supplier, decide before September whether you will reverse or chase, and write to the supplier so the correspondence exists.
Hold the tax component of future payments to a supplier on the watch list. That commercial lever is more effective than any notice.
What to do on Monday
Run a supplier filing status extract quarterly and maintain a watch list with the credit value at risk.
Diarise the thirtieth of September check and the thirtieth of November reversal as compliance dates.
Write to defaulting suppliers before reversing, and keep the correspondence for the eventual notice.
Hold the tax component in future payments to watch list suppliers.
This page states the general position. A reader with a specific question on their own facts may write to the GST practice at AMLEGALS.
Write to the GST practiceQuestions we are asked on this
Is interest payable if we reverse by 30 November?
No. Interest arises only if the reversal is not made by that date.
Can we re avail after the Section 16(4) date has passed?
Yes. Rule 37A provides for re availment on the supplier filing, and it is not a fresh availment.
What if the supplier files GSTR-3B for some months and not others?
The rule operates period by period. The reversal is confined to invoices relating to the periods for which the return was not filed.
Does Rule 37A displace a Section 16(2)(c) demand?
It is a strong argument that the specific mechanism governs, particularly against a penalty. It is not a guarantee, and the department contests it.
How do we know whether a supplier has filed?
The portal provides the filing status. Make the check a quarterly process rather than an annual one.
In this cluster
- Input tax credit under GST: the complete 2026 position
- Section 16(2)(c): can your ITC be denied because the supplier did not pay tax?
- Section 16(4) time limit for claiming ITC: what survives after the amnesty
- GSTR-2A and 2B mismatch notices: how to answer without conceding
- Blocked credits under Section 17(5): the clause by clause map
- Safari Retreats: what the Supreme Court decided on ITC for construction, and what Parliament then undid
- ITC on canteen, transport, insurance and other employee benefits
- ITC reversal under Rules 42 and 43: working the formula correctly
- Rule 37: ITC reversal when you do not pay your supplier within 180 days
- Rule 86A blocking of the electronic credit ledger: the remedies that actually work
GST Insights is published by AMLEGALS for general information. Law stated as on 3 September 2026. Not advice on any particular set of facts; not an advertisement or a solicitation under Rule 36 of the Bar Council of India Rules. Readers with a question on their own facts may write to the GST practice of their own accord.