Receiving a suspension alert on the GST portal stops daily billing in its tracks. Unlike a standard inquiry or assessment letter, a suspension notice directly freezes outward invoice issuance. You need to know exactly why the portal triggered Form GST REG-31 and what statutory steps restore your active status.
Why the portal issues Form GST REG-31
Under Rule 21A(2A) of the CGST Rules, registration is suspended electronically and communicated through Form GST REG-31 in two main situations:
- Bank account details missing: Under Rule 21A(2A)(b), contravention of Rule 10A leads to suspension. Under Rule 10A, a newly registered person must furnish bank account details within 30 days of registration or before filing outward supplies in Form GSTR-1 or Invoice Furnishing Facility, whichever comes earlier.
- Return discrepancies: Under Rule 21A(2A)(a), significant differences between outward supplies reported in Form GSTR-1 and tax paid in Form GSTR-3B trigger system-based suspension during cancellation proceedings.
This differs from standard cancellation notices issued under Rule 22(1) in Form GST REG-17, which grant 7 working days to reply. Form GST REG-31 gives you a longer window of 30 days to show cause why registration should not be cancelled.
Immediate business impact of suspension
Suspension brings statutory restrictions that block operational cash flows immediately:
- No tax invoices: According to Rule 21A of the CGST Rules, a person under suspension cannot make any taxable supply. The statutory explanation clarifies that you cannot issue a tax invoice and cannot charge tax on supplies made during this window.
- No input tax credit refunds: Under Rule 21A, the department will not grant any refund during the suspension period.
- E-way bill generation blocked: Under Rule 138E of the CGST Rules, no person can furnish information in Part A of Form GST EWB-01 for outward movement of goods when registration is suspended under Rule 21A.
Notice risk: Do not issue tax invoices while your GSTIN status displays Suspended. Any tax charged on unauthorized invoices invites penalty proceedings under Section 122. If your suspension remains unaddressed, the tax officer will proceed to cancel registration permanently under Rule 22(4) in Form GST REG-19.
How automatic revocation works
The third proviso to Rule 21A(4) of the CGST Rules provides relief for bank detail lapses. Where registration was suspended under Rule 21A(2A) for contravention of Rule 10A, the suspension is deemed to be revoked upon compliance with Rule 10A, provided the officer has not already issued a cancellation order under Rule 22.
For return filing or discrepancy notices, the proper officer reviews your reply or filed returns. Under Rule 22(3) of the CGST Rules, where the reply to the notice issued under sub-rule (2A) of Rule 21A is satisfactory, or where pending returns are furnished with tax, interest, and late fees, the officer drops the proceedings and passes an order in Form GST REG-20.
Common mistake: Waiting for the 30-day deadline before taking action. Inward purchases during this period leave buyers unable to claim ITC if your GSTIN is marked cancelled retrospectively. Check live risks in our guide on GST notices after reconciliation.
Worked example: resolving Rule 10A bank suspension
Consider an enterprise, Apex Tools, granted GST registration on 1 September 2026. The firm failed to add its current bank account details within 30 days. On 10 October 2026, the GST portal issued Form GST REG-31 suspending the GSTIN.
| Compliance step | Statutory provision | Time limit | Status |
|---|---|---|---|
| Bank account addition | Rule 10A | Within 30 days of registration | Defaulted |
| Intimation of suspension | Rule 21A(2A)(b), Form GST REG-31 | Notice dated 10 October 2026 | Suspended |
| Bank details updated on portal | Non-core amendment | Completed 14 October 2026 | Complied |
| Revocation effect | Rule 21A(4) third proviso | Immediate upon bank submission | Deemed revoked |
Apex Tools logged in to the portal, navigated to Services, then Registration, and completed the non-core amendment to add its verified bank details. Under the third proviso to Rule 21A(4), the suspension was deemed revoked without requiring personal hearings or physical office visits.
Step-by-step reply workflow
If your notice relates to return reconciliation differences rather than a missing bank account, submit your formal clarification online through the portal:
- Access clarification screen: Log in to the GST portal and navigate through Services > Registration > Application for Filing Clarifications.
- Locate notice: Enter the Notice Reference Number or Application Reference Number received with Form GST REG-31.
- Draft factual explanation: Address each difference highlighted by the system between your GSTR-1 outward records and GSTR-3B filings.
- Attach reconciliation statements: Upload supporting tax challans, credit note schedules, or monthly reconciliation summaries verifying tax discharge.
- Submit with verification: Sign the reply using your Digital Signature Certificate or Electronic Verification Code.
Frequently asked questions
What is Form GST REG-31?
Form GST REG-31 is an electronic intimation issued under Rule 21A of the CGST Rules when the GST portal or tax authority suspends your GST registration, giving you 30 days to explain why your registration should not be cancelled.
Can you issue tax invoices while under suspension?
No. Under Rule 21A of the CGST Rules, a taxpayer whose registration is suspended cannot make any taxable supply, meaning they cannot issue a tax invoice or charge GST on supplies.
Does suspension in Form GST REG-31 revoke automatically?
Yes, if the suspension was triggered by non-compliance with bank account reporting under Rule 10A, the third proviso to Rule 21A(4) states that suspension is deemed to be revoked once valid bank account details are furnished, provided the registration was not already cancelled under Rule 22.
Reconcile your returns before notices arrive
Mismatches between GSTR-1, GSTR-3B, and GSTR-2B trigger portal notices and suspension actions. Reconcile invoices accurately in your browser to spot variances before month end.
Your GSTR-2B and purchase register files are read in your browser and never uploaded to any server.
Last checked: 25 October 2026. Sources: CBIC CGST Rules Chapter III (Registration), GSTN Registration Clarifications Guide.