Rule 88C and DRC-01B: The GSTR-1 vs GSTR-3B Intimation

Rule 88C and DRC explained: this guide covers what it means, who it applies to, the step-by-step process, documents required, fees, due dates and penalties in India — so you can stay compliant with confidence and avoid costly mistakes.

Before Rule 88C, a difference between the liability in GSTR-1 and the liability paid in GSTR-3B waited for s.61 scrutiny — often years later, by which time interest had accumulated.

Now it arrives within weeks, and it carries its own sanction.

Rule 88C(1): where the tax payable per GSTR-1, as amended in GSTR-1A if any, or the IFF, exceeds the tax payable per GSTR-3B for that period by such amount and such percentage as recommended by the Council, the person is intimated of the difference in Part A of FORM GST DRC-01B, electronically and by email, and directed to either pay the differential liability with interest through FORM GST DRC-03, or explain the difference on the portal, within seven days.

The trigger

Two thresholds, both recommended by the Council and notified — an amount and a percentage. The intimation issues only where both are crossed, so a small absolute difference or a small proportionate one does not trigger it.

The comparison is:

Tax payable per GSTR-1 (as amended by GSTR-1A, or per the IFF) minus Tax payable per GSTR-3B for the same period.

A positive difference — more declared in GSTR-1 than paid in GSTR-3B — triggers the intimation. The reverse does not; that is Rule 88D territory in the credit context, and s.61 scrutiny generally. Rule 88D and DRC-01C →

The two responses

Pay. Discharge the differential liability along with interest under s.50, through FORM GST DRC-03, and furnish the details of payment in Part B of DRC-01B.

Explain. Furnish a reply in Part B of DRC-01B incorporating the reasons for the difference that remains unpaid.

Both within seven days.

The legitimate explanations

Most differences are timing or classification, not evasion:

Reverse charge supplies. Outward supplies on which the recipient pays under s.9(3) are reported in GSTR-1 but carry no liability in the supplier's GSTR-3B. A GTA or an advocate's firm will show this difference every month, and it is entirely correct.

Credit notes. A credit note reported in GSTR-1 reduces the GSTR-3B liability. Where the timing differs, the two do not match.

Amendments to a previous period. GSTR-1 amendment tables carry prior-period corrections that GSTR-3B netted in a different month.

Advances. Tax on an advance paid in an earlier GSTR-3B, with the invoice reported in GSTR-1 of a later period, and the advance adjusted in Table 11B.

Exports with payment of IGST. Reported in GSTR-1 Table 6A and in GSTR-3B Table 3.1(b); a timing difference between shipping bill date and invoice date can produce a gap.

Supplies through an e-commerce operator under s.9(5). Reported by the supplier for information, with the tax paid by the operator.

Rounding and consolidation differences.

An explanation citing the specific category, with the reconciliation attached, is what closes the intimation.

The sanction for not responding

Rule 59(6)(d): a registered person shall not be allowed to furnish GSTR-1 or use the IFF where he has not furnished a reply in Part B of FORM GST DRC-01B in respect of a DRC-01B Part A intimation.

So an unanswered DRC-01B blocks the next GSTR-1 — and through s.39(10), the next GSTR-3B as well. The whole chain stops. Sequential filing →

Rule 88C(3): where the amount specified in the intimation remains unpaid within the period and no explanation or reason is furnished, or the explanation is not acceptable to the proper officer, the amount shall be recoverable under s.79.

That is significant. Section 79 recovery ordinarily follows a determination under s.73, s.74 or s.74A. Here, an unanswered intimation becomes directly recoverable — no show cause notice, no adjudication order.

Practical handling

• Build the GSTR-1 to GSTR-3B reconciliation monthly, before filing GSTR-3B. Most DRC-01B intimations are avoidable.
• Use GSTR-1A to fix the period where the difference arose from an error in GSTR-1. GSTR-1A →
• Maintain a standing explanation for recurring structural differences — reverse charge outward supplies, s.9(5) supplies — so each month's reply is a template plus figures.
• Reply even where the difference is fully explained. The block under Rule 59(6)(d) is triggered by not replying, not by the difference itself.
• Where the liability is genuinely short, pay through DRC-03 with interest rather than waiting. Interest runs regardless.
• Diarise seven days from the intimation, not from when it was noticed.

Key takeaways

• Rule 88C: a notified amount and percentage difference between GSTR-1 and GSTR-3B liability triggers DRC-01B Part A.
• Seven days to pay through DRC-03 or explain in Part B.
• Reverse charge outward supplies are the most common legitimate explanation.
• Rule 59(6)(d) blocks the next GSTR-1 and IFF where no reply is furnished.
• Rule 88C(3): an unpaid, unexplained amount is recoverable under s.79 without adjudication.
• The reconciliation should be done before GSTR-3B, not after the intimation.

Read next

• Sequential Filing: Why One Missed Return Blocks Everything
• GSTR-1A: The Amendment Return
• Rule 88D and DRC-01C: ITC Availed versus Available
• GSTR-1 vs GSTR-3B: Differences and Reconciliation

Disclaimer: Positions stated as on 5 September 2026, based on the CGST Rules as amended to 31 March 2026 (ICAI Bare Law, 12th edition). Verify the current notified amount and percentage thresholds.