GST number suspended: the 90-day revocation playbook

Your GSTIN shows "suspended" on the portal, or worse, "cancelled." Either way your first instinct is the same: can I still raise invoices, is my B2B portal about to freeze my account, do I need to start a fresh registration from scratch? Take a breath and check which of the two you're actually dealing with, because a GST registration suspended notice and an outright cancellation run on completely different clocks.

This post is the playbook for both stages: what actually triggers a suspension, what starts the countdown on cancellation, and the 90-day window (with a further extension most operators don't know exists) to get your registration back before you're staring down an appeal or a fresh application.

Suspension is not cancellation: two different clocks

A GST suspension under Rule 21A leaves your registration legally alive, just paused. Cancellation under Section 29 is the event that actually starts a countdown, because only a cancelled registration can be revoked, and revocation carries a hard deadline. Confusing the two is why operators either panic too early or wait too long.

Practically: if the portal says "suspended," you're usually mid-process, waiting on a reply or an automatic system flag to clear. If it says "cancelled," you've already crossed into the window where a specific form, filed by a specific date, is your only route back. Everything below assumes you know which one you're looking at.

Why your GSTIN actually got flagged

Most suspensions are automatic, not punitive. Rule 21A(2A) triggers a system-generated suspension whenever the department's software flags a significant mismatch between your own GSTR-3B filings and the outward-supply or ITC data reported in GSTR-1, or a contravention of Rule 10A (the bank-account-linking requirement). You get a notice in Form GST REG-31 and 30 days to respond before anything more serious happens.

Cancellation is a separate, officer-driven process. Under Section 29(2), a proper officer can cancel a registration for non-filing of returns, among other grounds, set at three consecutive tax periods for a composition taxpayer and six continuous months for a regular one (as of August 2026; confirm current thresholds with your CA). The procedure runs through a show-cause notice in Form GST REG-17, your reply within 7 working days in Form GST REG-18, and then either a cancellation order in REG-19 or a dropped proceeding in REG-20. It's the REG-19 order date that starts your 90-day clock, not the earlier suspension.

The same-week script: your corporate client and the B2B portal

A suspended or cancelled GSTIN moves faster in the market than it does through the tax department. Tell a corporate client immediately, in plain terms: your account is under review, invoices raised in this window may not carry input tax credit for them until it clears, and you'll confirm the exact date it's resolved. Corporate clients generally accept a status update more calmly than silence followed by a bounced invoice.

Your B2B portal is the other urgent call. Wholesalers, DMCs and net-rate portals typically check GSTIN status against the government database periodically, and a flagged number can get an account paused or payments held pending clarification, independent of anything the portal itself decides on its own. During suspension you cannot issue a tax invoice or effect a taxable supply, and you cannot claim a refund under Section 54, so that commercial freeze is often not the portal being difficult, it's the law. This is also the moment your input tax credit reconciliation becomes urgent: any ITC you were counting on from suppliers can stall the same way yours does for your own clients.

Step 1: clear every pending return before you file anything else

Revocation is conditional, not automatic. If your registration was cancelled for non-filing, the tax department will not even process a revocation request until you've cleared the backlog. Every outstanding GSTR-1 and GSTR-3B must be filed, along with the tax, interest, penalty and late fee due up to the date of the cancellation order, before your revocation application has any chance of succeeding.

Pull your filing history first. If GSTR-1 vs 3B mismatches were part of how you got flagged in the first place, reconcile the two table by table before you file anything else, otherwise you risk landing right back in the same trap once your registration is live again.

Careful: Don't file the pending returns and assume that's the whole job. It's the precondition for step 2, not a substitute for it. Filing returns alone doesn't reinstate a cancelled registration.

Step 2: file REG-21 inside the 90-day window

How to revoke a cancelled GST registration after 90 days, and before, comes down to one form and one date. Under Section 30 read with Rule 23, you apply for revocation in Form GST REG-21 within 90 days of the date your cancellation order was served. This limit was raised from an earlier 30 days by Notification No. 38/2023-Central Tax, dated 4 August 2023, so if you're working from an older memory of "30 days," update it.

Mark the cancellation order's service date on a calendar the day it lands, not the day you decide to deal with it. Rule 23 also carries an Aadhaar authentication requirement, effective since Notification No. 35/2021-Central Tax (1 January 2022), so keep that step handy rather than discovering it mid-application. As of August 2026, confirm the current 90-day figure with your CA before you build a deadline into your own compliance calendar, since notification numbers and windows do move.

Once REG-21 is filed, the officer must dispose of it within 30 days, either approving it (Form GST REG-22) or issuing a show-cause proposing rejection (Form GST REG-23), which you get a chance to respond to before a final call.

Missed 90 days? The extension most operators don't know exists

Missing the 90-day window doesn't automatically close the door. The Commissioner, or an officer not below the rank of Additional or Joint Commissioner, can extend the revocation window by a further 180 days on sufficient cause being shown, a provision added by the same 4 August 2023 notification that lifted the base window to 90 days.

"Sufficient cause" is a judgment call, not a checklist, but the applications that tend to get heard sympathetically explain a genuine reason for the delay: a medical emergency, a bookkeeper who left mid-season, a genuine confusion over the order's service date. File the extension request with the same seriousness as REG-21 itself: documented reasons, cleared returns, and every rupee of tax, interest and penalty settled up to the cancellation date.

If the extension window also closes

How to revoke a cancelled GST registration after 180 days, or after the full 90-plus-180 stretch, is where the picture gets less certain. Trade sources point to an appeal under Section 107 of the CGST Act as the fallback once both the base window and the extension lapse. This post won't print a specific appeal deadline or pre-deposit percentage here: confirm the current appeal timeline and deposit requirement with your CA before you rely on either figure, since this could not be independently verified from a primary source.

How to revoke a cancelled GST registration after 270 days, practically, usually means the revocation route itself is exhausted (90 days plus a 180-day extension covers that span) and you're either pursuing the Section 107 appeal or accepting a fresh GST registration as the realistic path forward. A fresh GSTIN is a genuine reset, not a shortcut: you lose continuity of your old GSTIN's filing history, any pending input tax credit tied to the cancelled number gets complicated to recover, and any B2B portal or corporate client listing tied to your old GSTIN needs to be re-verified against the new one. Treat it as the last resort it is, not a quick fix to skip the paperwork above.

The GST registration cancellation revocation time limit

The base limit is 90 days from the date your cancellation order (Form GST REG-19) was served, up from 30 days after Notification No. 38/2023-Central Tax. A further 180-day extension is available on sufficient cause, taking the outer edge of the revocation route to roughly 270 days from the order date, after which the fallback shifts to an appeal or a fresh registration. Confirm the current figures with your CA before you treat either number as fixed, since compliance windows are amended from time to time.

After revocation comes through: what's still owed

Getting a REG-22 approval order feels like the finish line, but two obligations follow immediately. First, you must file every return that fell due for the period after your original cancellation date, within 30 days of the revocation order, even though you weren't legally operating a valid registration during that gap. Second, if your Aadhaar re-authentication wasn't already cleared as part of REG-21, expect the portal to prompt for it before your GSTIN behaves normally on invoicing and e-way bill generation again.

Once that's done, go back through your corporate clients and B2B portal accounts and confirm the status has actually refreshed on their side, not just yours. A revoked GSTIN sometimes takes a few days to propagate through third-party verification tools, and an account still flagged as "cancelled" downstream can keep blocking your invoices even after your own portal shows active.

Common questions

GST number suspended, what to do?

Check the portal for the exact reason first, most commonly a GSTR-1 vs 3B mismatch (Rule 21A) or a return-filing gap. Respond to the REG-31 notice within its 30-day window with the reconciliation or the missing filings, since suspension is usually reversible without ever escalating to a full cancellation.

How to revoke a cancelled GST registration after 90 days?

File Form GST REG-21 under Section 30 read with Rule 23 as close to the cancellation order's service date as possible; the base window is 90 days. If you're past it, apply for the 180-day extension available on sufficient cause rather than assuming the door is shut.

How to revoke a cancelled GST registration after 180 days?

This is your extension window, not a separate deadline. The Commissioner or an Additional/Joint Commissioner can grant up to 180 more days on sufficient cause beyond the initial 90, so the application still goes in as a revocation request, just with a stronger explanation attached.

How to revoke a cancelled GST registration after 270 days?

At that point the standard revocation route (90 plus 180 days) has typically run out. The realistic options are an appeal under Section 107 of the CGST Act (confirm the current deadline and pre-deposit with your CA) or applying for a fresh GST registration.

GST got suspended, what to do?

Treat it as urgent but not yet a crisis: your registration is still alive. Fix the underlying trigger, whether that's a GSTR-1/3B mismatch or an unlinked bank account under Rule 10A, and respond inside the 30-day REG-31 window so the suspension lifts before an officer escalates it toward cancellation.

The short version

• A suspension under Rule 21A leaves your registration alive; a cancellation under Section 29 is what starts the revocation clock.
• Most suspensions are automatic, triggered by a GSTR-1 vs GSTR-3B mismatch or a Rule 10A bank-linking gap; you get 30 days to respond via Form GST REG-31.
• During suspension you cannot invoice or claim refunds; tell corporate clients and your B2B portal contacts the same week, before they find out from a bounced invoice.
• Clear every pending return, tax, interest, penalty and late fee up to the cancellation date first. Form GST REG-21 has no chance without it.
• File REG-21 within 90 days of the cancellation order (up from 30 days since 4 August 2023); a further 180-day extension exists on sufficient cause.
• Past roughly 270 days, the realistic paths are an appeal under Section 107 (confirm the deadline with your CA) or a fresh registration, which costs you filing history and ITC continuity.
• After revocation, you still owe every return that fell due during the gap, filed within 30 days, plus Aadhaar re-authentication if it wasn't cleared earlier.