Registration Is the Tax Identity of the Business
In every merger, amalgamation, demerger, takeover or business transfer, the parties usually examine valuation, assets, liabilities, contracts, employees and input tax credit. However, another equally important issue is the business's GST registration. GST registration is not merely a number on the portal. It is the tax identity through which the business issues invoices, collects tax, files returns, claims input tax credit, generates e-way bills, applies for refunds and receives departmental communications.
When a business changes hands, the GST registration profile must also be examined carefully. The parties must determine who will carry on the business after restructuring, from which date the new person must be registered, whether the existing registration should be amended, and whether the old registration should be cancelled. If this is not handled properly, invoices may be issued under the wrong GSTIN, input tax credit may be disputed, notices may be sent to the wrong person, and the continuity of business operations may be affected.

The legal principle is that GST registration must follow the real business identity. The person actually carrying on the business must be properly registered; the registration profile must remain accurate; and an old registration should not continue when the business has moved to another person. This principle is reflected mainly in Sections 22, 25, 28 and 29 of the CGST Act, 2017.
When the Successor Must Step Into Registration: Section 22(3)
Section 22(3) deals with a business carried on by a registered taxable person which is transferred as a going concern to another person, whether on account of succession or otherwise. In such a case, the transferee or successor becomes liable to be registered with effect from the date of transfer or succession.
The expression "succession or otherwise" is wide. It may cover the sale of a business as a going concern, the transfer of an undertaking, the takeover of a running business, succession after the death of a proprietor, or other arrangements where the business continues in the hands of another person. The focus is not merely on the transfer of assets. The business should move as a going concern so that it can be continued by the transferee or successor.
For example, if Kirti Ltd. transfers its entire manufacturing undertaking to Shreyans Industries Ltd. as a going concern with effect from 1 August 2026, Shreyans Industries Ltd. becomes the person carrying on that business from that date. If Shreyans Industries Ltd. is not already appropriately registered for that business and place of supply, it must obtain registration from the date of transfer. The old registration of Kirti Ltd. does not automatically become the registration of Shreyans Industries Ltd.
This is a practical point of great importance. Under GST, registration is linked to the person and the State. A transferee cannot simply continue to use the transferor's GSTIN after the business has been transferred. If invoices are issued under the wrong GSTIN after the transfer date, customers may face input tax credit issues, and the department may question the correctness of the supplies reported.
Amalgamation and Demerger: The ROC Certificate Becomes Crucial Under Section 22(4)
Section 22(4) specifically deals with the amalgamation and demerger of companies pursuant to a sanctioned scheme or arrangement. It provides that in such cases, the transferee is liable to be registered with effect from the date on which the Registrar of Companies issues a certificate of incorporation giving effect to the order of the High Court, Tribunal or other competent authority.
This provision is important because merger and demerger schemes often include an appointed date that precedes the order date or the ROC certificate date. From an accounting or company law perspective, the scheme may operate from an earlier date. However, for GST registration purposes, Section 22(4) emphasises the date on which the ROC certificate takes effect.
Suppose Anish Ltd. and Harpreet Ltd. amalgamate into Aayra Ltd. under an NCLT-approved scheme. The appointed date in the scheme is 1 April 2026, the NCLT order is dated 20 August 2026, and the ROC certificate is issued on 15 September 2026. For purposes of Section 22(4), the registration liability of the transferee is linked to 15 September 2026. This helps avoid confusion between the appointed date, the order date and the date on which the corporate restructuring is actually recognised for registration purposes.
Section 22(4) should also be read with Section 87. Section 87 preserves the distinct GST identities of the amalgamating companies up to the date of the merger order, for the limited purpose of recognising supplies during the intervening period. Section 22(4), on the other hand, identifies the date from which the transferee becomes liable to registration. Together, these provisions bring practical certainty to retrospective amalgamations and demergers.
The Thirty-Day Clock After Liability Arises: Section 25
Once a person becomes liable to registration under Section 22, Section 25 becomes relevant. Section 25(1) requires every person liable to be registered to apply for registration within thirty days from the date on which he becomes liable to registration.
In an ordinary business transfer covered by Section 22(3), the thirty-day period will run from the date of transfer or succession. In an amalgamation or demerger covered by Section 22(4), the period should be counted from the date on which the ROC issues the certificate giving effect to the scheme. This timing should be incorporated into the transaction's closing checklist.
Delay in obtaining registration can create avoidable problems. The transferee may have to make supplies, issue invoices, generate e-way bills and receive inward supplies immediately after taking over the business. If registration is not in place, the business may face operational disruption. Vendors and customers may also continue using the old GSTIN, leading to mismatch and input tax credit disputes.
In the case of the death of a sole proprietor, CBIC Circular No. 96/15/2019-GST dated 28 March 2019 gives useful guidance. Where the business is continued by a legal heir or successor, the successor must obtain registration from the date of succession. The old registration of the deceased proprietor may be cancelled by the legal heirs, and where unutilised ITC is to be transferred, Form GST ITC-02 should be filed before cancellation of the old registration.
Amendment or Fresh Registration: The PAN Test
One of the most common mistakes in restructuring is assuming that every change can be handled by amending the existing registration. This is not correct. The first practical question is whether the same legal person and the same PAN continue after the restructuring.
If the same PAN continues, an amendment may be sufficient in appropriate cases. For example, a company may change its legal name after an amalgamation but continue to use the same PAN. A business may add an acquired factory as an additional place of business. A company may change its directors, authorised signatory, email address or mobile number after a takeover. These situations can usually be handled by amending registration particulars under Section 28, read with Rule 19 of the CGST Rules, 2017.
However, if the restructuring results in a different legal person or a different PAN, an amendment is not enough. Fresh registration may be required in Form GST REG-01. For example, if a proprietorship business is transferred to a private limited company, the PAN changes. The company must obtain its own registration, and the proprietor's old registration may need to be cancelled. Similarly, where a partnership firm is converted into another legal entity with a new PAN, the old registration cannot simply be amended to become the registration of the new entity.
Keeping the GST Profile Aligned With Reality: Section 28
Section 28 requires every registered person to inform the proper officer of any change in the information furnished at the time of registration or thereafter. Rule 19 of the CGST Rules, 2017prescribes the manner and timing. The registered person must file an amendment application in Form GST REG-14 within fifteen days of the relevant change, along with supporting documents.
This provision is particularly important after mergers, takeovers and internal restructuring. The legal name of the business may change. The principal place of business may shift. Additional places, such as factories, warehouses, or offices, may be added or deleted. Directors, partners or persons responsible for day-to-day affairs may change. The authorised signatory may also change. If these changes are not updated, the GST portal will continue to show an outdated business profile.
Certain key amendments require approval from the appropriate officer. These include changes to the legal name, principal place of business, additional locations, and updates to partners, directors, Karta, managing committee members, trustees, the chief executive officer, or other individuals responsible for daily operations. According to Rule 19(5)(a)of the CGST Rules, 2017, the officer must act within fifteen working days of receiving the application. If a show-cause notice is issued and the taxpayer responds, the officer must decide within seven working days of receiving the reply, as per Rule 19(5)(b)of the CGST Rules, 2017. Once approved, the amendment becomes effective on the date the related business event took place.
Other amendments do not require prior approval and become effective upon submission on the portal. However, even such changes should be made carefully, as GST communications, notices, and system-generated alerts often depend on portal details. In a takeover, failure to update the authorised signatory, email address, or mobile number may result in notices being sent to persons who are no longer responsible for the business.
Retrospective amendment should not be assumed. Rule 19(1A)of the CGST Rules, 2017 provides that registration particulars generally do not stand amended retrospectively from a date earlier than the date of submission of Form GST REG-14. A retrospective amendment may be allowed by the Commissioner for reasons recorded in writing, subject to prescribed conditions. Therefore, if there is a delay in updating the registration after restructuring, the parties may need to examine whether retrospective effect is required and whether it can be properly obtained.
When the Old GSTIN Must Exit: Section 29
Section 29 deals with cancellation or suspension of registration. In restructuring, cancellation may become necessary where the business has been discontinued, fully transferred, amalgamated with another legal entity, demerged or otherwise disposed of. Cancellation may also be required where there is a change in constitution resulting in a new legal person, or where the taxable person is no longer liable for registration.
Rule 20of the CGST Rules, 2017, prescribes the procedure for cancellation on application. The registered person is required to file Form GST REG-16 electronically, generally within thirty days of the event warranting cancellation. In the event of the registered person's death, the legal heirs may file the application. In the case of a transfer, merger, or amalgamation, particulars of the transferee or the new entity are also relevant.
Cancellation should be coordinated with fresh registration, amendment and transfer of ITC. If the old registration is cancelled before Form GST ITC-02 is filed and accepted, transfer of unutilised ITC may become difficult. If the transferee has not obtained registration before the old registration is cancelled, business continuity may suffer. Therefore, the old GSTIN should not be cancelled mechanically. It should be exited only after the successor's registration and credit transfer requirements have been properly planned.
For example, if Kirti Ltd. transfers its entire business as a going concern to Shreyans Industries Ltd. and will no longer carry on taxable business, Kirti Ltd. may apply for the cancellation of its registration. However, Shreyans Industries Ltd. should have the appropriate registration in place, vendors and customers should be informed of the new GSTIN, and any eligible ITC transfer under Section 18(3) should be addressed before cancellation is completed.
Suspension and Retrospective Cancellation: Risks That Affect the Deal
Section 29(2) also empowers the proper officer to cancel registration for defaults such as contravention of prescribed provisions, non-filing of returns for the prescribed period, non-commencement of business after voluntary registration, or registration obtained by fraud, wilful misstatement or suppression of facts. During the pendency of cancellation proceedings, registration may also be suspended.
Suspension can be commercially serious. During suspension, the registered person cannot make taxable supplies, issue tax invoices or charge tax. Refunds of unutilised credit may also be affected in specified cases. In a takeover or merger, a suspended GSTIN can disrupt invoicing, e-way bills, customer credit and business continuity. Therefore, due diligence should not be limited to whether the target has a GSTIN. The acquirer should verify whether the registration is active, suspended, cancelled, or subject to cancellation due to return defaults, allegations of fake invoices, ITC irregularities, or mismatch issues.
Retrospective cancellation is another serious risk. Section 29(2) permits cancellation from a retrospective date, but such power must be exercised with reason. Courts have held that registration cannot be mechanically cancelled from the original date merely because returns were not filed for a later period. Retrospective cancellation may affect past invoices; customers' input tax credit and the validity of transactions reported under that GSTIN. In acquisition due diligence, the history of cancellation notices and orders should therefore be examined carefully.
Cancellation Is Not a Tax Clearance Certificate
Section 29(3) makes it clear that cancellation of registration does not affect liability to pay tax or other dues for any period prior to cancellation. Such liability may be determined before or after cancellation. This is a very important principle in restructuring.
The cancellation of the transferor's registration does not wipe out past GST exposure. Audits, investigations, notices, demands, interest, penalty, input tax credit disputes and return obligations for the pre-cancellation period may still continue. Therefore, transaction documents should allocate responsibility for pre-cancellation liabilities. The buyer should not assume that cancellation of the seller's old GSTIN means that the tax history of that business has ended.
Section 29(5) also creates a financial consequence on cancellation. A registered person whose registration is cancelled may be required to pay an amount linked to input tax credit on inputs held in stock, inputs contained in semi-finished or finished goods, and capital goods or plant and machinery on the day immediately preceding cancellation, or the output tax payable on such goods, whichever is higher. The final return in Form GSTR-10 under Section 45 also becomes relevant after cancellation. In business transfers, stock, capital goods, ITC transfer and final return liability should therefore be reconciled before the old registration is closed.
Final Word: The GSTIN Must Follow the Business Reality
GST registration is the operational identity of a business. In a restructuring transaction, the question is not only whether tax is payable or credit is transferable. The more basic question is whether the correct person is registered as of the correct date and whether the portal records reflect the actual business position.
The law should therefore be applied as a connected registration framework. The successor's liability to register, the time for making the application, the need to amend existing particulars, and the cancellation or suspension of the old registration must all be examined together. These consequences arise principally under Sections 22, 25, 28 and 29 of the CGST Act.
The practical message is clear. In every merger, demerger, takeover, slump sale, succession, or business transfer, GST registration should be planned before closing, not after invoices start failing. The correct GSTIN, timely amendment, proper cancellation, preservation of past records and coordination with ITC transfer can protect business continuity and prevent avoidable GST disputes.
