A GST show-cause notice usually arrives months or years after the period it questions. It may allege an input tax credit (ITC) mismatch, short payment of tax, wrong classification or undisclosed turnover, and it comes with a demand for tax, interest and penalty. How the business responds in the first few weeks often shapes everything that follows: whether the matter closes at the adjudication stage, how much penalty applies, and whether a strong appeal remains possible.

This guide explains how a GST show cause notice works under the CGST Act, 2017, how to prepare a reply, what happens at the hearing and order stage, and how the appeal route runs from the Appellate Authority to the GST Appellate Tribunal (GSTAT). The law is stated as of October 2026.

What Is a GST Show-Cause Notice?

A show-cause notice (SCN) is a formal notice from a GST officer asking a taxpayer to explain why tax, interest and penalty should not be demanded. It is issued in Form GST DRC-01, with a summary uploaded on the GST portal. It is the start of adjudication, not a final demand: no recovery can be made on the basis of the SCN alone, and the taxpayer has a right to reply and be heard.

Before issuing an SCN, the officer may send a pre-SCN intimation in Form GST DRC-01A, giving the taxpayer a chance to pay or explain. This step is currently discretionary, so not every case will have one. Where it is issued, a well-reasoned response at that stage can sometimes prevent the SCN altogether.

Which Section Applies: 73, 74 or 74A?

The section matters because it decides the time limit, the penalty and whether fraud is alleged.

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For erroneous refunds, the time limits run from the date of the refund rather than the annual return due date. Section 74A was introduced by the Finance (No. 2) Act, 2024 to replace the two-track system for FY 2024-25 onwards with a single timeline. Checking the dates is the first defence: a notice or order issued after the limit can be challenged on that ground alone.

Penalty Under Each Section and How Early Payment Reduces It

The law rewards early payment of tax and interest, which matters when part of the demand is clearly correct.

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Interest under Section 50 is payable in addition to tax in all cases. Paying an admitted portion early does not stop you from contesting the rest. If a notice under Section 74 alleges fraud but the officer cannot establish it, Section 75(2) requires the demand to be recomputed as a non-fraud case.

Common Grounds for GST Show-Cause Notices

• ITC mismatches between GSTR-3B and GSTR-2A/2B, often due to supplier non-filing
• Ineligible or blocked credit under Section 17(5)
• Short payment where GSTR-1 liability exceeds GSTR-3B payment
• Classification or rate disputes for goods or services
• Turnover differences between GST returns, income tax returns, e-way bills or financial statements
• Reverse charge liabilities not discharged
• Place of supply issues affecting IGST versus CGST and SGST
• Erroneous refunds, including export and inverted duty refunds
• Credit from cancelled or non-existent suppliers, which may be treated more seriously

Many of these arise from data-matching on the GST system. A mismatch is a starting point for inquiry; it is not proof that tax is actually due, and the reply is the place to explain the difference.

How to Reply to a GST Show-Cause Notice: Step by Step

1. Record the deadline. The notice states the time allowed to reply, commonly 30 days. If you need more time, request it in writing before the deadline and keep proof.
2. Read the notice closely. Identify the section, tax period, each allegation, the amounts demanded and the documents relied on. Ask for copies of any relied-upon documents you have not received.
3. Check jurisdiction and limitation. Confirm the officer’s authority, that the notice was issued within the time limit for that year, and that the correct section has been invoked.
4. Reconcile the numbers. Compare the department’s figures with GSTR-1, GSTR-3B, GSTR-2B, GSTR-9/9C, books of account and e-way bills. Many notices fail on arithmetic or duplication.
5. Decide on early payment. Where part of the demand is correct, consider paying that portion with interest within the reduced-penalty window, through Form GST DRC-03, and say so in the reply.
6. Prepare the reply. Address every allegation in turn with facts, reconciliations, legal provisions, circulars and relevant judgments. Raise legal objections, such as limitation or lack of jurisdiction, without waiving factual arguments.
7. Attach evidence. Include invoices, payment proofs, supplier confirmations, contracts, ledger extracts and reconciliation statements, indexed and referenced in the reply.
8. File in Form GST DRC-06 on the portal and keep the acknowledgment. Ask for a personal hearing in the reply.

The reply is also the record an appellate authority will later review. Points not raised at this stage can be harder to argue later, so it is worth being thorough. Our guide on responding to an income tax notice covers the parallel process under the Income-tax Act.

Personal Hearing and the Adjudication Order

Under Section 75(4), an opportunity of hearing must be given where the taxpayer requests it in writing or where an adverse decision is contemplated. Adjournments are allowed for sufficient cause, but no more than three times during the proceedings under Section 75(5). Prepare a short written synopsis for the hearing and file any additional submissions promptly afterwards.

The officer then issues an order in Form GST DRC-07. The order must give reasons, cannot confirm a demand higher than the SCN amount and cannot rely on grounds not stated in the SCN. If the order contains apparent errors, a rectification application under Section 161 may be possible, but it does not extend the appeal deadline, so plan both in parallel.

Appealing a GST Order: The Appellate Route

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The 10% pre-deposit is calculated on disputed tax only, not on interest or penalty. Once it is paid and the appeal is filed, recovery of the balance is deemed stayed. For appeals against penalty-only orders, a pre-deposit of 10% of the disputed penalty now applies at both the first appeal and Tribunal stages, effective 1 October 2025, with no monetary cap. Integrated tax has its own ceiling, so check the IGST position in mixed cases.

The GST Appellate Tribunal Is Now Functional

For years, second appeals could not be filed because the Tribunal had not been constituted. The GSTAT was launched on 24 September 2025, with a Principal Bench in New Delhi and State Benches across the country, and appeals are filed online on the GSTAT e-filing portal. For orders communicated before 1 April 2026, the Government had set a one-time window for filing appeals; that window was later extended to 31 July 2026 and has now closed. Appeals against later orders follow the normal three-month limit. Delayed appeals depend on the Tribunal’s discretion to condone delay, so they should be treated as exceptional.

Writ Petitions

In some situations, such as a clear violation of natural justice, an order passed without jurisdiction or beyond limitation, a High Court writ petition under Article 226 may be considered. Courts generally expect taxpayers to use the statutory appeal route first, so this is a matter for case-specific legal advice.

Documents to Keep Ready for GST Litigation

• The SCN, DRC-01A (if any), relied-upon documents and all correspondence
• GSTR-1, GSTR-3B, GSTR-2A/2B and GSTR-9/9C for the period
• Books of account, ledgers and trial balance
• Sales and purchase invoices, debit and credit notes
• E-way bills, transport and delivery records
• Bank statements and proof of payment to suppliers
• Contracts, purchase orders and work orders
• Reconciliation statements for every disputed figure
• Earlier replies, hearing records and orders
• DRC-03 challans for any amounts paid

Common Mistakes in Handling GST Notices

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When to Engage a GST Litigation Professional

Professional support is especially useful when the demand is large, fraud or suppression is alleged, the issue involves classification, place of supply or ITC from cancelled suppliers, several years are under review, or an appeal or Tribunal filing is due. Chartered accountants can act as authorised representatives before GST authorities and the Tribunal under Section 116. A professional can check limitation, reconcile data, draft replies and grounds of appeal, and represent the business at hearings, but cannot guarantee a particular outcome.

AAPT & Associates provides GST litigation services, from SCN replies to appeals, alongside regular GST compliance that reduces the risk of notices in the first place.

Frequently Asked Questions

Respond Early, Document Everything

Most GST disputes are won or lost on the quality of the record: accurate reconciliations, a complete reply and evidence filed at the adjudication stage. Check limitation first, use early payment where part of the demand is valid, and keep the appeal timeline in view from the day the order arrives.

This article provides general information as of October 2026 and is not legal or tax advice for any specific case. GST law and procedures change frequently; confirm the current position before acting.

Official sources: CBIC GST (Acts, Rules, Notifications) · GST Portal · GSTAT e-Filing Portal