You cannot use one GSTIN for registrations in multiple states. If your business is liable to register in more than one state or Union territory, it generally needs a separate, state-specific registration for each. Those registrations use the same PAN, but each is treated as a distinct person under the GST Act. The GST Portal’s TRN is only an application reference—not a GSTIN or proof that registration has been granted.
How multiple state registrations work
Section 25 of the CGST Act provides for registration in each state or Union territory where a person is liable to register. In general, a person has one registration within a state or UT, subject to exceptions in the Act and rules. A registration in one state does not extend to other states.
When a person has more than one registration, section 25(4) says they “shall, in respect of each such registration, be treated as distinct persons for the purposes of this Act.” That distinct-person treatment means the registrations are not simply branches using one GSTIN for all GST compliance. Review the CGST Act on the CBIC website for the applicable statutory text.
Whether you need a registration in a particular state depends on your facts and the law—not simply on having a customer there. For example, CBIC’s FAQ discusses a service supplier registering at the location from which the services are supplied, but that example does not settle every business situation. Check the CBIC GST FAQs and obtain qualified advice for fact-specific or complex cases.
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Make a list of each state or UT where you may be liable to register, and assess the business facts for each location. The GST Portal application is state-specific: the state selected in Part A carries into the state context of the form. You must complete a separate application process for each additional state where registration is required; approval of one does not automatically register the business elsewhere.
Do not confuse this multi-state requirement with the separate question of whether to obtain optional separate registrations for multiple places of business or business verticals within a single state. Those situations are addressed separately under the Act and rules.
What the TRN means—and how long a draft lasts
During Part A, the portal verifies the applicant’s details, including mobile and email OTPs, and displays registrations linked to the PAN. After this verification, it generates a Temporary Reference Number (TRN). Use the TRN to return to and complete the saved Part B application. It is not the final GSTIN and does not show that the application has been approved.
The GST Portal’s normal-taxpayer registration manual says an application draft that is not submitted within 15 days is purged, along with the information saved against that TRN. The manual’s publication date is not stated on the retrieved page, so check the current portal instructions if you are relying on this period.
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How to complete and submit a state registration
- Start Part A: On the GST Portal, choose the applicant type and the state or UT for this application. Enter the PAN and contact details, then complete the requested mobile and email OTP verification.
- Record the TRN: After verification, note the TRN and use it to resume the saved application. Keep the selected state in mind: the form continues in that state’s context.
- Complete Part B: Fill in the applicable sections for the business, people, principal and additional places of business, goods or services, state-specific information, authentication, and verification. Provide the requested supporting details and documents.
- Complete the required authentication and submit: The portal describes PAN validation and, where applicable, Aadhaar authentication. Depending on the applicable route, Aadhaar authentication may involve OTP or a biometric appointment. Follow the method presented for your application rather than assuming every applicant follows the same route.
- Keep the ARN: After the required authentication and final filing steps are completed successfully, the portal issues an Application Reference Number (ARN) as an acknowledgement. Use it to track that application; it is not the granted GSTIN.
- Repeat for each state where required: Start and complete a separate state-specific registration application for each additional state or UT where the business is liable to register.
The portal’s screens and authentication routing may change. Follow the current prompts and instructions on the GST Portal.
What happens after filing: review, clarification and approval
An officer examines the application. Under Rule 9 of the CGST Registration Rules, where the application and accompanying documents are found in order, the rule specifies approval within three working days from submission. This is a conditional statutory period, not a guaranteed total turnaround time for every application.
If information or documents are deficient, or clarification is needed, the rules provide for a notice and response process. A clarification request or verification step can affect how long the application takes. Monitor the application status and respond to any notice through the channel and within the time specified in it. The CBIC registration rules and notifications provide the governing rules; the page’s publication or update date is not stated in the retrieved result.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Track each application separately
Because each required state registration is a separate application, keep its details and status distinct. A simple tracking record can help prevent one state’s ARN, clarification request, or approval from being mistaken for another’s.
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- Whether registration liability applies in that state or UT.
- TRN while the draft is being completed, then ARN after successful filing.
- Any authentication route or physical verification requirement shown for that application.
- Whether an officer has requested clarification, and the response deadline stated in the notice.
Official materials describe the general process but do not establish a universal approval speed across states. Assess liability and any unusual business arrangement under the current law and the facts of your case.
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