GST DRC-01B & DRC-01C Notice: How to Reply Online

TL;DR

Form GST DRC-01B and DRC-01C are system-generated intimations issued under Rule 88C and Rule 88D when your tax liability or input tax credit mismatches exceed portal tolerance thresholds. You have exactly 7 days to pay the differential amount with interest or submit factual explanations in Part B. Failing to act automatically blocks subsequent GSTR-1 filings under Rule 59(6).

Quick Answer: What Should You Do Within 7 Days?

When you receive an automated intimation in Form GST DRC-01B or Form GST DRC-01C on the GST Portal, you must act within 7 days of service. Access Services > Returns > Return Compliance on the GST common portal. You have two lawful courses of action: either pay the differential tax or excess input tax credit (ITC) along with applicable interest under Section 50 via Form GST DRC-03, or submit a line-by-line justification in Part B selecting the relevant pre-set reason codes and attaching reconciliation documentation.

If you neither pay nor submit Part B within 7 days, the portal system automatically blocks the generation and filing of your outward supplies return (GSTR-1 / IFF) for the subsequent period under Rule 59(6)(e) and Rule 59(6)(f). Furthermore, the jurisdictional tax officer is empowered to initiate summary recovery proceedings under Section 79 without issuing a separate show-cause notice.

Key Takeaways

• DRC-01B handles liability differences between GSTR-1 and GSTR-3B under Rule 88C.
• DRC-01C handles ITC differences between GSTR-2B and GSTR-3B under Rule 88D.
• Strict 7-day statutory window applies to pay via DRC-03 or submit Part B.
• Non-compliance automatically blocks subsequent GSTR-1 and IFF filing under Rule 59(6).
• Interest under Section 50(3) applies only when excess ITC was both availed and utilized.
• Filing a valid Part B reply immediately unblocks your GSTR-1 filing access.

Understanding Form GST DRC-01B and DRC-01C

Automated compliance monitoring on the GST Network (GSTN) has replaced manual officer-level scrutiny for routine monthly return variances. Under the Central Goods and Services Tax (CGST) Rules and corresponding Gujarat Goods and Services Tax (GGST) Rules, algorithms continuously compare outward liability declarations and input credit claims across sequential forms.

Form GST DRC-01B (Rule 88C)

A system-generated intimation issued when the tax liability declared in Form GSTR-1 or through the Invoice Furnishing Facility (IFF) exceeds the tax paid in Form GSTR-3B for a given return period by a prescribed percentage and monetary threshold.

Form GST DRC-01C (Rule 88D)

A system-generated intimation issued when the Input Tax Credit (ITC) availed in Form GSTR-3B exceeds the credit available in the auto-generated Form GSTR-2B for that period by a prescribed percentage and monetary threshold.

Rule 59(6) Portal Blocking

The statutory mechanism that restricts a registered taxpayer from filing GSTR-1 or using the IFF if an outstanding DRC-01B or DRC-01C intimation has not been addressed within the prescribed 7-day timeline.

Both mechanisms operate on a two-part framework:

1. Part A (Intimation): Issued automatically by the portal to the taxpayer via email, SMS, and portal dashboard, highlighting the exact category-wise differential (IGST, CGST, SGST, and Cess).
2. Part B (Reply by Taxpayer): The electronic response form where the taxpayer records payments made through Form GST DRC-03 or provides specific reconciliation reasons explaining why the difference arose.

Prescribed Thresholds for Automated Notices

While the GST Council recommended system triggers where the variance exceeds 20% and ₹25 lakh, the CBIC circulars permit state and central tax administrations to adjust detection sensitivity during risk-based scrutiny drives. In practice, businesses across Gujarat commercial centres—from Surat textile houses to Rajkot auto-component manufacturers—frequently encounter automated intimations whenever system-matched variances persist across a monthly return cycle.

DRC-01B vs DRC-01C: Comparison of Triggers, Rules and Consequences

Understanding the differences between these two intimations is essential for finance teams and tax consultants to formulate the appropriate procedural response.

Feature	Form GST DRC-01B	Form GST DRC-01C
Statutory Rule	Rule 88C, CGST/GGST Rules 2017	Rule 88D, CGST/GGST Rules 2017
Notified By	Notification No. 26/2022-Central Tax (26 Dec 2022)	Notification No. 38/2023-Central Tax (04 Aug 2023)
Primary Comparison	GSTR-1 / IFF vs GSTR-3B	GSTR-2B vs GSTR-3B
Focus Area	Output Tax Liability short-paid	Input Tax Credit (ITC) excess-availed
Intimation Notice	Form GST DRC-01B (Part A)	Form GST DRC-01C (Part A)
Response Notice	Form GST DRC-01B (Part B)	Form GST DRC-01C (Part B)
Statutory Time Limit	7 days from date of intimation	7 days from date of intimation
Payment Mechanism	Form GST DRC-03 (Cause: Rule 88C)	Form GST DRC-03 (Cause: Rule 88D)
Portal Blocking Rule	Rule 59(6)(e) — blocks next GSTR-1/IFF	Rule 59(6)(f) — blocks next GSTR-1/IFF
Direct Recovery Section	Section 79 via Form GST DRC-01D	Section 79 via Form GST DRC-01D

Why Did You Receive the Notice? Common Root Causes

Automated intimations are algorithmic flags; they do not automatically establish tax evasion or illegality. Legitimate commercial transactions frequently generate return mismatches due to timing discrepancies, credit note processing, and data entry errors.

1. Root Causes for DRC-01B (GSTR-1 vs GSTR-3B Liability Mismatches)

• Excess Tax Paid in Earlier Months: A taxpayer may have inadvertently overpaid output tax in a previous month’s GSTR-3B. To adjust this, they report full sales in GSTR-1 but pay a reduced cash amount in the current month’s GSTR-3B without routing through Table 9/10 amendments.
• Credit Note and Debit Note Lags: A manufacturing unit in Morbi or Surat issues credit notes to buyers for volume rebates or damaged goods. If the credit notes are uploaded in GSTR-1 Table 9B but the net tax liability in GSTR-3B is reduced below the portal’s automated check threshold, a DRC-01B alert triggers.
• Clerical Data Entry Typo: An invoice of ₹1,00,000 with 18% GST (₹18,000) is mistakenly keyed into GSTR-1 as ₹10,00,000 with ₹1,80,000 tax. GSTR-3B is filed correctly based on real sales books. The portal detects a ₹1,62,000 short payment and generates DRC-01B.
• Advances Received and Adjusted: Tax on advances received for service contracts (such as IT consulting in Ahmedabad or Gandhinagar) reported in Table 11A of GSTR-1, adjusted against final invoices in Table 11B during a different month.
• Zero-Rated Export Reporting Confusion: Export invoices billed under Letter of Undertaking (LUT) mistakenly placed in Table 4A (domestic B2B with payment) in GSTR-1, while zero tax was rightfully remitted in GSTR-3B Table 3.1(b).

2. Root Causes for DRC-01C (GSTR-2B vs GSTR-3B Input Tax Credit Mismatches)

• Late GSTR-1 Filing by Vendors: A vendor in Vadodara files their GSTR-1 on the 16th of the month—after the GSTR-2B generation cut-off on the 14th. The buyer in Ahmedabad, holding valid invoices and proof of delivery, avails the ITC in GSTR-3B. The portal’s GSTR-2B snapshot does not reflect the invoice, triggering DRC-01C.
• Quarterly QRMP Vendor Schedule: Small suppliers operating under the Quarterly Return Monthly Payment (QRMP) scheme file quarterly returns. If an MSME supplier does not upload invoices in the monthly Invoice Furnishing Facility (IFF), the buyer’s monthly GSTR-2B lacks the credit even though goods were received and paid for.
• Inadvertent Claim of Ineligible or Blocked Credit: Clerical errors where motor vehicle purchases, personal insurance, or other Section 17(5) blocked items were claimed in Table 4(A)(5) instead of being left out or reversed in Table 4(B).
• Re-Availment of Reversible ITC (Rule 37): A business reverses credit in June because supplier payment crossed 180 days. In September, upon paying the vendor, the business re-claims the credit under Table 4(A)(5) and Table 4(D)(1). Because GSTR-2B has no new invoice for this re-claim, a variance triggers.
• Import of Goods and Customs ICEGATE Delays: For port-intensive operations around Mundra, Kandla, Hazira, and Pipavav, Bill of Entry details occasionally take 48–72 hours to transmit from ICEGATE to GSTR-2B Table 4(A)(1). Availing credit based on the physical BoE payment challan triggers an automated mismatch if GSTR-2B has not yet updated.

Part B Dropdown Reasons Explained

When responding to an automated intimation in Part B, taxpayers must choose from predefined dropdown reasons provided by the GSTN system. Understanding what each option signifies prevents subsequent departmental inquiries.

Part B Options for Form GST DRC-01B (Liability)

Reason Code	Portal Pre-Set Description	When to Choose	Supporting Evidence Required
Reason 1	Excess liability paid in earlier tax periods in Form GSTR-3B	You paid extra tax in previous months and adjusted it against current sales.	ARN of previous GSTR-3B returns, tax ledger statement showing excess payment.
Reason 2	Some transactions reported in GSTR-1 were cancelled or amended through credit notes	Invoices reported in GSTR-1 were cancelled or reduced by credit notes not yet fully reflected.	Credit note register, delivery cancellation proofs, revised invoice copies.
Reason 3	Typographical or clerical error in Form GSTR-1	An extra zero or wrong tax rate was entered in GSTR-1, but GSTR-3B was paid on true figures.	Sales book reconciliation, declaration confirming amendment in next GSTR-1.
Reason 4	Advance received reported in GSTR-1, adjusted against invoice in GSTR-3B	Advance tax declared previously, now adjusted against tax invoice issued in the current period.	Advance voucher numbers, invoice mapping statement, Table 11 reconciliation.
Reason 5	Any other reason	Any commercial circumstance not covered above (e.g. export with LUT vs with tax confusion).	Detailed textual explanation (max 500 characters) plus comprehensive PDF working paper.

Part B Options for Form GST DRC-01C (Input Tax Credit)

Reason Code	Portal Pre-Set Description	When to Choose	Supporting Evidence Required
Reason 1	Input tax credit not availed in earlier tax periods due to inadvertence or late receipt	Invoices belonging to previous months claimed in current GSTR-3B within Section 16(4) time limit.	Invoice date register, previous GSTR-2B statements, purchase ledger matching.
Reason 2	Inadvertent clerical mistake in Table 4 of Form GSTR-3B	A typographical error in claiming ITC that will be reversed in the upcoming GSTR-3B.	Working calculation sheet, undertaking to reverse in Table 4(B) next month.
Reason 3	ITC availed on inward supplies from suppliers filing on quarterly (QRMP) basis	Suppliers file quarterly; invoices will appear in next GSTR-2B upon their quarterly filing.	Vendor GSTIN list, tax invoices, vendor confirmation emails of QRMP status.
Reason 4	Re-availment of ITC previously reversed under Rule 37 / Rule 37A	Vendor was paid after initial 180-day reversal, allowing lawful re-availment under Section 16.	Bank payment advice, original reversal details from earlier GSTR-3B Table 4(B)(2).
Reason 5	Import of goods details not reflected in GSTR-2B	Customs Bill of Entry details delayed on ICEGATE-GSTN transmission bridge.	Bill of Entry copies, ICEGATE duty payment challans, port clearance documents.
Reason 6	Any other reason	Other lawful commercial grounds (e.g., ISD credit distribution mismatch, Section 18 opening credits).	Factual summary narrative plus itemized invoice-level Excel/PDF reconciliation.

How to Calculate Interest Under Section 50

If an intimation reveals genuine short-payment of tax or an invalid ITC claim, paying the tax alone is insufficient. Section 50 of the CGST Act mandates the payment of statutory interest. Calculating this correctly protects your business from further demand notices under Section 73 or 74.

1. Interest on Output Tax Liability (Section 50(1))

• Applicable Rate: 18% per annum.
• Calculation Base: Calculated on the net tax liability paid in cash through the Electronic Cash Ledger, running from the original statutory due date of the return until the date of actual payment via Form GST DRC-03.
• Formula:

  Interest = (Net Tax Liability Paid in Cash × 18 × Days of Delay) / (365 × 100)

2. Interest on Wrongly Availed ITC (Section 50(3) read with Rule 88B)

A widespread misconception among business owners is that interest applies immediately upon availing excess ITC in GSTR-3B.

Following the retrospective amendment to Section 50(3) (effective from 1 July 2017) and Rule 88B:

• No interest is payable if the excess ITC was merely availed but NOT utilized. If your Electronic Credit Ledger closing balance remained higher than the excess credit claimed throughout the period, you only need to reverse the credit—no interest is due under Section 50(3).
• Interest applies only when credit is BOTH availed and utilized. If the ledger balance dipped below the excess claimed amount, interest at 18% per annum applies on the utilized portion from the date the return was filed (or credit utilized) until the date of reversal.

Worked Example: Worked Calculation of DRC-01C Liability and Interest

Suppose an agro-processing enterprise in Anand or Rajkot receives a DRC-01C intimation for June 2026:

• ITC availed in GSTR-3B (June 2026, filed 20 July 2026): ₹12,00,000
• ITC available in GSTR-2B (June 2026): ₹8,50,000
• Differential ITC flagged in DRC-01C (Part A): ₹3,50,000

Upon reconciliation on 5 August 2026, the company discovers:

1. ₹2,00,000 represents eligible invoices from QRMP suppliers who will file in July. This portion is legitimate; Reason 3 is selected in Part B with invoice attachments.
2. ₹1,50,000 was an inadvertent double-entry of a machinery purchase invoice that must be paid back.
3. Review of the Electronic Credit Ledger shows the balance never dropped below ₹4,00,000 between 20 July and 5 August 2026. Because the ₹1,50,000 was never utilized to discharge cash tax liabilities, zero interest is payable under Section 50(3) read with Rule 88B.

The business pays ₹1,50,000 via DRC-03 under Rule 88D, inputs the DRC-03 ARN into Part B, explains the ₹2,00,000 QRMP invoices, and submits Part B. Total cash outflow: ₹1,50,000 (tax only). Zero penalty, zero interest, and GSTR-1 access remains fully operational.

Step-by-Step Guide: How to Reply to DRC-01B and DRC-01C on the GST Portal

Follow this tested step-by-step workflow to file your Part B reply and safeguard your return filing status.

1. Access the Return Compliance Dashboard Log into the official GST Portal (gst.gov.in). In the top navigation menu, navigate to Services > Returns > Return Compliance. Click on the ITC Mismatch (DRC-01C) or Liability Mismatch (DRC-01B) tile depending on the notice received.

2. Download and Review Part A Details Locate the specific Reference Number (ARN) corresponding to the flagged tax period. Click on the reference link to open the intimation summary. Download the system report containing the category-wise split (IGST, CGST, SGST, Cess) and note the exact difference amount.

3. Perform an Invoice-Level Internal Reconciliation Compare your internal audited books of accounts (Sales Register for DRC-01B, Purchase Register for DRC-01C) against the filed GSTR-1, GSTR-3B, and GSTR-2B data. Identify whether the differential is attributable to timing lags, clerical errors, credit notes, or an unpaid tax liability.

4. Discharge Admitted Tax via Form GST DRC-03 (If Applicable) If any portion of the variance is an admitted liability, navigate to Services > User Services > My Applications > Application for Payment (DRC-03).

   • Select Cause of Payment as Liability Mismatch - GSTR-1 to GSTR-3B (Rule 88C) or ITC Mismatch - GSTR-2B to GSTR-3B (Rule 88D).
   • Enter the tax period, pay the tax and applicable interest from cash/credit ledgers, and download the generated DRC-03 ARN.

5. Open and Complete Part B of the Notice Return to Services > Returns > Return Compliance. Open the relevant notice and scroll to Part B (Reply by Taxpayer).

   • Under Section A (Paid via DRC-03), enter the ARN of the DRC-03 payment. The portal auto-validates and populates the amount paid.
   • Under Section B (Reason for Difference), select the appropriate checkbox and choose the matching reason from the dropdown list.

6. Provide Detailed Text Explanations and Upload Supporting Documents If you select “Any other reason” or when supporting complex adjustments, write a concise explanation in the text box (up to 500 characters). Upload your supporting reconciliation spreadsheet or vendor declarations in PDF format (maximum file size: 5 MB). Ensure your file name contains only letters, numbers, and hyphens without special characters.

7. Sign and Submit Using DSC or EVC Select the authorized signatory from the dropdown list. Check the declaration box confirming the veracity of the statements. Click File DRC-01B (Part B) or File DRC-01C (Part B). Authenticate using a Digital Signature Certificate (mandatory for Companies and LLPs) or Electronic Verification Code via Aadhaar OTP (available for Proprietorships and Partnerships).

Upon successful submission, the portal generates an Acknowledgement Reference Number. The status updates to “Completed”, and the automated block on your GSTR-1 / IFF is instantly lifted.

Consequence of Non-Compliance: How GSTR-1 Gets Blocked Under Rule 59(6)

Ignoring an automated DRC-01B or DRC-01C intimation triggers an escalating chain of compliance penalties that can paralyze a business’s daily operations.

DRC-01B / DRC-01C Issued (Day 1)
       │
       ▼
7-Day Statutory Response Window
       │
       ├─► Option A: Pay via DRC-03 + File Part B ──► Status: Completed (GSTR-1 Active)
       │
       ├─► Option B: Submit Justification in Part B ─► Status: Completed (GSTR-1 Active)
       │
       ▼ (Day 8: No Action Taken)
Rule 59(6) Lock Triggered
       │
       ├─► GSTR-1 / IFF Blocked for Subsequent Period
       ├─► E-Way Bill Generation Suspended (Rule 138E)
       ├─► Customers Denied ITC (Invoices Missing in GSTR-2B)
       └─► Direct Tax Recovery Initiated Under Section 79 (DRC-01D)

1. Subsequent Return Blocking under Rule 59(6)(e) and (f): Once the 7-day clock expires without a Part B submission, the portal prevents you from filing your next monthly GSTR-1 or quarterly IFF. If you cannot file GSTR-1, your buyers cannot view invoices in their GSTR-2B, leading to withheld client payments and lost commercial contracts.
2. Suspension of E-Way Bill Generation (Rule 138E): Under Rule 138E of the CGST Rules, taxpayers blocked from filing outward returns automatically lose the facility to generate E-Way Bills. For manufacturing facilities in Gujarat delivering goods across state borders, logistics ground to a halt.
3. Summary Recovery Under Section 79 via Form GST DRC-01D: Ordinarily, the tax department must issue a show-cause notice under Section 73 or Section 74, followed by adjudication proceedings before initiating bank attachments. However, under Section 79 read with Rule 88C(3) and Rule 88D(3), unpaid liabilities from un-replied DRC-01B/C intimations can be recovered directly via Form GST DRC-01D through garnishee orders, bank account freezes, or seizure of movable property.

Common Mistakes to Avoid

1. Waiting until Day 7 or later to log into the Return Compliance dashboard on the portal.
2. Discharging admitted liability through regular GSTR-3B instead of generating a dedicated DRC-03 challan linked to Rule 88C or 88D.
3. Choosing “Any other reason” without uploading an itemized invoice-level Excel or PDF reconciliation sheet.
4. Paying Section 50(3) interest on unutilized ITC when the Electronic Credit Ledger balance never dipped below the excess claim.
5. Assuming an email or physical letter sent to your local jurisdictional GST officer substitutes for filing Part B on the portal.
6. Ignoring mismatches caused by quarterly QRMP vendors instead of filing Reason 3 with vendor GSTIN lists.

Frequently Asked Questions

What is the time limit to file a response to Form GST DRC-01B and DRC-01C?

The statutory time limit is exactly 7 days from the date the intimation was made available on the GST Portal. Taxpayers must either pay the differential tax through Form GST DRC-03 or file an electronic reply in Part B within this 7-day period.

Does filing a reply in Part B immediately unblock GSTR-1?

Yes. As soon as you successfully submit Part B of Form GST DRC-01B or DRC-01C using DSC or EVC, the portal system updates your compliance status to “Completed” and automatically restores your ability to file GSTR-1 or use the Invoice Furnishing Facility (IFF).

Can I pay part of the liability in DRC-03 and explain the remaining amount in Part B?

Yes. The Part B form is structured to accommodate hybrid responses. You can enter the ARN of a DRC-03 payment for the admitted portion in Section A and select dropdown reasons along with text remarks for the remaining disputed balance in Section B.

What should I do if my supplier filed their GSTR-1 after the 14th of the month?

Select Reason 1 or Reason 3 in Part B of Form GST DRC-01C, explaining that the supplier filed GSTR-1 after the 14th cut-off date. Attach an invoice list showing the supplier GSTIN, invoice date, value, and the subsequent GSTR-2B period where the credit appeared.

Is personal appearance or hearing required for automated DRC-01B or DRC-01C intimations?

No personal appearance or physical office visit is required during the initial 7-day intimation stage. Form GST DRC-01B and DRC-01C are entirely automated portal processes; your response is submitted electronically through Part B on the GST website.

Can a GST officer reject my Part B reply without a show-cause notice?

If the proper officer finds your Part B explanation unsatisfactory or incomplete, they cannot directly demand payment without following due process. They must issue a formal Show Cause Notice under Section 73 or Section 74, giving you an opportunity for a personal hearing before issuing an order.

What happens if I make a clerical error in GSTR-1 reporting?

If an inadvertent typographical error exaggerated your GSTR-1 liability, select Reason 3 in Part B of DRC-01B. You must provide a brief explanation and state that the erroneous invoice will be rectified via Table 9 or Table 10 amendments in the upcoming GSTR-1 return.

How does Section 50(3) interest apply if my electronic credit ledger always had sufficient balance?

Under Section 50(3) read with Rule 88B of the CGST Rules, interest is levied only when input tax credit has been both availed and utilized. If your ledger balance consistently exceeded the excess ITC amount claimed, no cash benefit was derived, and no interest is legally payable upon reversal.

Sources and References

• Central Goods and Services Tax Act, 2017: Section 37 (Outward supplies), Section 38 (Inward supplies), Section 39 (Returns), Section 50 (Interest on delayed tax payment), Section 79 (Recovery of tax).
• Central Goods and Services Tax Rules, 2017: Rule 59(6) (Return blocking conditions), Rule 88B (Manner of calculating interest), Rule 88C (Dealing with GSTR-1 vs GSTR-3B liability difference), Rule 88D (Dealing with GSTR-2B vs GSTR-3B ITC difference).
• Notification No. 26/2022-Central Tax (26 Dec 2022): Insertion of Rule 88C and Form GST DRC-01B into the CGST Rules.
• Notification No. 38/2023-Central Tax (04 Aug 2023): Insertion of Rule 88D, Rule 59(6)(f), and Form GST DRC-01C into the CGST Rules.
• Circular No. 192/04/2023-GST (17 July 2023): Clarification on charging of interest under Section 50(3) in cases of wrong availment and utilization of credit.
• GST Council: Recommendations of the 48th and 50th GST Council Meetings on automated mismatch management.
• Official GST Portal: gst.gov.in — Return Compliance User Manuals and Technical Workflows.

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Need assistance reviewing an automated GST intimation or resolving a blocked return? Review our GST return filing service or explore our GST compliance handbook and input tax credit guide. You can also verify tax computations using our online GST calculator. For persistent mismatches, consult our guide on how to handle GST notices or review GSTR-2B vs GSTR-3B reconciliation.

Disclaimer: This article is prepared for informational purposes based on the CGST/GGST Acts and notifications in effect as of September 2026. Procedural rules and portal system tolerances are subject to ongoing administrative updates by the GST Council. Taxpayers facing demand proceedings or recovery actions should seek specialized professional advice tailored to their specific return filings.