Handling DRC-01B Discrepancy Notices: Indian Taxpayer Response Playbook

A DRC-01B notice is not yet a demand. It is the GSTN’s automated way of telling a taxpayer that the outward tax liability declared in GSTR-1 for a tax period is materially larger than the tax paid in GSTR-3B for the same period, and that the gap is large enough to warrant an explanation. Rule 88C of the CGST Rules, inserted by Notification 26/2022-Central Tax, gives the taxpayer a narrow 7-day window to either correct the short payment or justify the gap before the GSTR-1 filing for the next period is blocked and the matter moves to formal adjudication under Section 73 or Section 74.

This playbook walks Indian taxpayers and finance teams through the exact response sequence: how to read Part A, how to reconcile, when to pay through DRC-03, and how to draft the Part B reply so the period closes cleanly.

Quick reference

What exactly does Rule 88C say?

Rule 88C of the CGST Rules requires the system to issue an intimation in Part A of Form GST DRC-01B whenever the tax liability declared in GSTR-1 (including any IFF for the months of a quarter, for QRMP taxpayers) exceeds the tax payable in GSTR-3B for the same tax period by a difference that crosses the notified threshold. The current threshold, per the operative notification, is a gap that is both above ₹25 lakh in absolute terms and above 20 percent of the GSTR-3B tax paid. Both conditions must be met. A taxpayer whose GSTR-1 liability is ₹1.5 crore against GSTR-3B tax paid of ₹1.2 crore breaches both floors and will see Part A; a taxpayer whose gap is ₹40 lakh on a base of ₹3 crore breaches the absolute floor but not the percentage floor and will not.

Two procedural consequences follow from Part A. First, the next tax period’s GSTR-1 cannot be filed until either the differential tax is paid through DRC-03 and reported in Part B, or a reasoned reply is filed in Part B. Second, the 7-day clock for Part B begins on the date the intimation is generated on the portal, not the date the taxpayer opens it.

How is Part A different from Part B?

Part A is system-generated. It carries the GSTIN, the tax period, the GSTR-1 liability under each head (IGST, CGST, SGST, cess), the GSTR-3B tax paid under each head, the absolute gap, and the percentage gap. There is no officer signature; this is purely a portal intimation under Rule 88C.

Part B is the taxpayer’s reply. It allows two paths. The first is to record that the differential has been paid through DRC-03, quoting the ARN and challan reference. The second is to explain in narrative form why no short payment exists, attaching reconciliations and supporting documents. Both paths close the 7-day window. Only Part B filing lifts the GSTR-1 block.

What are the most common reasons the gap is not actually a short payment?

Before paying through DRC-03 by reflex, walk through these recurring causes. Many DRC-01B intimations dissolve once the reconciliation is done properly.

• Credit notes booked in a later 3B period. A credit note raised in March against a January invoice may have reduced GSTR-1 liability in the month it was reported but the corresponding 3B adjustment was claimed in a later period. The period-over-period view squares this off.
• GSTR-1 amendments that shift liability across periods. Table 9A and 9B amendments can move liability between tax periods, creating an apparent gap that reverses in the adjacent period.
• RCM liability paid in 3B but not reflected in GSTR-1 outward. This widens the GSTR-3B side; it should narrow the gap, not widen it, but mis-grouping in the working can mislead the reader.
• Exports and SEZ supplies under LUT. Zero-rated supplies appear in GSTR-1 but carry no tax liability; if the working misreads taxable value as tax, an artificial gap appears.
• Tax head misclassification. A supply reported as IGST in GSTR-1 but paid as CGST plus SGST in 3B, or vice versa, looks like a gap in one head and a surplus in another. Net liability may match; head-wise it does not.

A clean GSTR-1 vs GSTR-3B reconciliation across the notice period and the two adjoining periods is the single most useful artefact in the entire response.

Worked example: a ₹3.8 lakh DRC-01B

Consider a Bangalore-based industrial distributor, GSTIN 29AABCT1234R1Z5, for the tax period February of the financial year.

• GSTR-1 outward tax liability (head-wise): IGST ₹62 lakh, CGST ₹48 lakh, SGST ₹48 lakh. Total ₹1.58 crore.
• GSTR-3B Table 3.1 tax paid: IGST ₹60.2 lakh, CGST ₹47 lakh, SGST ₹47 lakh. Total ₹1.542 crore.
• Absolute gap: ₹3.8 lakh.

At first glance, ₹3.8 lakh is well below the ₹25 lakh absolute floor, so no DRC-01B should arise. But consider a different fact pattern often seen in practice. The distributor under-reported in 3B by ₹3.8 lakh in February and by ₹28 lakh in March owing to a finance team handover. The cumulative quarter-end review picks this up, but by then DRC-01B for March has already been issued because the March gap of ₹28 lakh exceeds both Rule 88C floors against a 3B liability of ₹1.3 crore (28 lakh is above 20 percent of 1.3 crore).

The response sequence the distributor follows:

1. Day 1 (intimation received). Finance pulls GSTR-1 and GSTR-3B for January, February, and March. The head-wise gap for March is confirmed at ₹28 lakh; the underlying cause is a ₹26 lakh export invoice incorrectly tagged taxable in the tax engine and ₹2 lakh of B2B sales that were filed in GSTR-1 but missed in 3B.
2. Day 2. The ₹26 lakh export portion is reclassified zero-rated; this requires a Table 9A amendment in the next GSTR-1, not a DRC-03 payment. The remaining ₹2 lakh is a genuine short payment.
3. Day 3. DRC-03 challan is generated for ₹2 lakh tax plus Section 50 interest at 18 percent per annum for the months delayed. ARN is captured.
4. Day 4. Part B is filed. The narrative quotes Rule 88C, explains that ₹26 lakh of the apparent gap is an export reclassification corrected via Table 9A in the next period’s GSTR-1, that ₹2 lakh has been paid through DRC-03 with ARN, and that the residual reconciliation tally is attached.
5. Day 5. The GSTR-1 filing block for April is lifted. No Section 73 notice issues.

The cost of the episode is the Section 50 interest on ₹2 lakh, the time of two finance staff for half a day each, and a documented reconciliation that the audit team can rely on for the rest of the year.

When should you simply pay through DRC-03?

If the reconciliation confirms that the gap is a genuine short payment with no offsetting amendment or credit note explanation, paying through DRC-03 is faster, cheaper, and closes the period. Section 50 interest is 18 percent per annum on the unpaid tax for the period of delay. There is no penalty if the payment is made voluntarily before a Section 74 notice is served. The DRC-03 ARN is then recorded in Part B and the matter is closed.

The mistake worth avoiding is paying through DRC-03 before the reconciliation is done. If half of the apparent gap is actually an export misclassification, paying tax on it inflates the cash outflow and creates a refund claim that takes months to settle.

If you want a quick estimate of how much tax cash is sitting in reconciliation gaps across your GSTINs before the next DRC-01B lands, the ITC Leakage Calculator gives a directional read in a few minutes.

What does the Section 73 / Section 74 escalation look like?

If Part B is not filed within 7 days, the GSTR-1 block on the next period stays, and the proper officer is free to issue a notice under Section 73 (non-fraud cases) or Section 74 (cases involving fraud, suppression, or wilful misstatement). Section 73 carries a maximum penalty of 10 percent of tax or ₹10,000 whichever is higher, and the limitation period for the order is 3 years from the due date of the annual return. Section 74 carries penalty equal to the tax involved and a 5-year limitation. Both end in a DRC-07 summary order quantifying tax, interest, and penalty.

Treating DRC-01B as the self-correction window it is, rather than as a low-priority portal alert, is significantly cheaper than absorbing a DRC-07 order and litigating it.

What evidence should the reply bundle contain?

A defensible Part B reply is supported by a documented bundle that an audit officer can read in 15 minutes:

• The period-wise GSTR-1 vs GSTR-3B reconciliation, head-wise, with totals tying back to the portal figures in Part A.
• Invoice-level support for any line item that contributes more than 1 percent of the gap.
• Credit note linkage to original invoices, including the period in which each leg was reported.
• Amendment register showing Table 9A and 9B entries that explain timing differences.
• DRC-03 challan if differential tax was paid, with ARN and a copy of the electronic acknowledgement.
• A short narrative quoting Rule 88C of the CGST Rules, Section 50 for interest, and Section 73 to acknowledge the escalation path the taxpayer has avoided.

Retain this bundle for at least 6 years to cover the Section 74 limitation period.

Building a system that prevents DRC-01B from arising

Most DRC-01B intimations are avoidable. A monthly GSTR-1 vs GSTR-3B reconciliation, run before the 3B is filed rather than after the notice is received, catches the gap when it is still cheap to correct. Tax engines that auto-classify exports, schedule credit notes, and reconcile head-wise tax across the two returns make this a near-zero-touch process. The investment is small relative to the working-capital impact of DRC-03 payments, the interest accrual on missed periods, and the audit time spent on Section 73 responses.

For teams running the reconciliation at scale across multiple GSTINs and tax periods, see GST reconciliation software for the operational pattern and reconciliation software India for the broader category framing.