Imagine your GST registration got cancelled by the tax officer — not because you applied for it, but because the officer did it on his own (suo motu). Now your business is stuck: you can't collect GST, can't claim Input Tax Credit, and customers won't deal with you. Section 30 is your lifeline — it gives you the right to revoke (i.e., undo) that cancellation and get your registration back.
Who can apply and when? Only a person whose registration was cancelled by the proper officer on his own motion (under Section 29) can use Section 30. If you voluntarily applied for cancellation, this section does NOT apply to you. You must file the revocation application within 30 days from the date of service of the cancellation order. Miss this window, and you lose the right to apply directly — you'd have to approach the appellate authority instead. The application must be filed in the prescribed manner (Form GST REG-21 on the GST portal).
What happens after you apply? The proper officer reviews your application and must give you a fair hearing before rejecting it — he cannot simply dismiss it without letting you explain your side. He will either: (a) revoke the cancellation and restore your registration, or (b) reject the application with reasons. There's also an important practical rule: the officer will typically insist that all pending returns are filed and dues are paid before revocation — you can't get your registration back while hiding a pile of unfiled returns.
Cross-Act symmetry (sub-section 3): If your SGST or UTGST registration cancellation is revoked, it is automatically treated as revocation under CGST too — and vice versa. This prevents the absurd situation where you're registered under one Act but not the other. This is a favourite 1-mark MCQ point in exams. The proviso about the 22 July 2019 deadline is a transitional/historical provision — ignore it for May 2026 exam purposes.
Example 1 — Timeline Check
Mr. Ramesh runs a small textile trading firm in Surat. The GST officer cancels his registration suo motu on 1 April 2025 (service of order on the same date) because Ramesh had not filed returns for 6 consecutive months.
| Step | Detail |
|---|---|
| Date of service of cancellation order | 1 April 2025 |
| 30-day window ends on | 30 April 2025 |
| Ramesh files revocation application on | 28 April 2025 |
Working: 28 April 2025 is within 30 days of 1 April 2025. ✅ Application is valid and the officer must process it.
Ramesh first files all 6 pending GSTR-3B returns and clears ₹1,20,000 in outstanding tax + ₹18,000 in late fees. The officer, after giving Ramesh a hearing, revokes the cancellation.
Final Answer: Revocation is valid. Ramesh's GSTIN is restored.
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Example 2 — The Cross-Act Rule
Ms. Kavitha operates a boutique in Bengaluru. The Karnataka GST (SGST) officer revokes the cancellation of her SGST registration on 10 March 2025.
Question: Does she need to separately apply to the Central Tax officer to revoke her CGST registration?
Working: As per Section 30(3), revocation under SGST Act = deemed revocation under CGST Act automatically.
Final Answer: No separate application needed. Her CGST registration stands revoked-and-restored automatically. She saves time and avoids duplicate paperwork.
📖 Bare Act text — Section 30, CGST Act 2017
(click to expand)
(1) Subject to such conditions as may be prescribed, any registered person, whose registration is cancelled by the proper officer on his own motion, may apply to such officer for revocation of cancellation of the registration in the prescribed manner within thirty days from the date of service of the cancellation order.
[Provided that the registered person who was served notice under sub-section (2) of section 29 in the manner as provided in clause (c) or clause (d) of sub-section (1) of section 169 and who could not reply to the said notice, thereby resulting in cancellation of his registration certificate and is hence unable to file application for revocation of cancellation of registration under sub-section (1) of section 30 of the Act, against such order passed up to 31.03.2019, shall be allowed to file application for revocation of cancellation of the registration not later than 22.07.2019]
(2) The proper officer may, in such manner and within such period as may be prescribed, by order, either revoke cancellation of the registration or reject the application: Provided that the application for revocation of cancellation of registration shall not be rejected unless the applicant has been given an opportunity of being heard.
(3) The revocation of cancellation of registration under the State Goods and Services Tax Act or the Union Territory Goods and Services Tax Act, as the case may be, shall be deemed to be a revocation of cancellation of registration under this Act.