GST Multistate Registration: One Master TRN, Separate Registration in Every State

GSTN has introduced a “Multistate Registration” option on the GST common portal, announced in its advisory dated 1 October 2026. A business that needs registration in more than one State or Union territory under the same PAN can now enter its common particulars once, through a Master TRN, instead of keying them into a fresh application for every State. The law on registration is untouched: section 25 of the Central Goods and Services Tax Act, 2017 (CGST Act) still requires a separate registration in each State, and each State still decides its own application. What follows sets out how the facility works, what it leaves exactly where it was, and the points the advisory does not settle.

What the advisory provides

The advisory is short. Its operative part reads:

It is informed that an option for “Multistate Registration” has been introduced. The functionality enables taxpayers to apply for registration in multiple States/UTs simultaneously. Taxpayers seeking GST registration in more than one State/UT under the same PAN can use this functionality. Currently, the functionality is available only for Normal Taxpayers.

The option sits as a “Multistate Registration” tab on the portal’s homepage. Only normal taxpayers are covered for now, so a casual taxable person or a non-resident taxable person applies through the existing route. For a business planning a roll-out across several States, the practical gain is in the first stage of the application, and nowhere else.

How the Master TRN works

The process runs in three stages.

Selecting the States. The applicant picks the States and Union territories in which registration is sought. On that selection the portal generates a Master TRN.

Common Registration Information. Against the Master TRN, the applicant fills in the Common Registration Information (CRI): business details, promoter or partner details, authorised signatory, authorised representative, and goods and services. The advisory states that the Master TRN “is required to be submitted within 15 days”.

State-wise TRNs. Once the CRI is submitted, the portal generates an individual TRN for each State selected. The CRI is auto-populated into each of them and remains editable. The applicant then completes, State by State, the principal place of business, any additional place of business, the State-specific information and Aadhaar authentication.

The saving is real but narrow. A company with several directors now enters their details once rather than once per State, which also means that any typing error is the same in every application instead of different in each. The premises documents for each State, which is where registration applications are usually held up, still have to be arranged and uploaded separately.

What has not changed

Section 25(1) of the CGST Act requires a person liable to registration to apply in every State or Union territory in which it is so liable, within thirty days from the date it becomes liable. Section 25(2) grants a single registration in a State, with a separate registration available for each place of business within it. Section 25(4) treats each registration of the same person, whether in one State or several, as a distinct person for the purposes of the Act.

Against that, the Master TRN is a shared starting point and no more. There is no all-India registration and no common GSTIN. Each State’s application goes to that State’s proper officer, who may raise a query, order physical verification or, if not satisfied, reject it, without regard to how the applications for other States are faring. Aadhaar authentication sits in the State-wise stage of the advisory, so it is done in each State’s application rather than once against the CRI.

Whether registration is needed in a State at all is still a question under sections 22 and 24, answered separately for each State. Selecting a State on the tab because customers are located there, without a liability to register in it, produces a registration with all its compliance for no reason.

The 15 days and the thirty days

The 15 days come from the advisory and apply to the Master TRN. The thirty days come from section 25(1) and run from the date the person becomes liable to registration. The thirty days carry a consequence. Under rule 10 of the CGST Rules, 2017, registration takes effect from the date of liability where the application is submitted within thirty days of that date. Where it is submitted later, the effective date is the date the registration is granted.

The advisory does not say which act counts as “submission of the application” for rule 10: submission of the CRI against the Master TRN, or submission of each State-wise application. Nor does it say when the 15 days begin, or what happens to the Master TRN, or to State-wise TRNs already generated, if the 15 days lapse. A portal timeline cannot shorten or extend the statutory period, but it can decide in practice whether an application gets filed in time. The safer reading is to treat the thirty days as running to the final submission of each State’s application, and to start the Master TRN early enough that every State’s application is in well inside that period.

A business that becomes liable in several States on different dates, for instance by opening branches in stages, has a different thirty-day period for each State. Grouping them under one Master TRN is convenient only where the dates are close.

Points the advisory leaves open

Existing registrants. The advisory refers to taxpayers “seeking GST registration in more than one State/UT under the same PAN”. It does not say whether a business already registered in its home State can use the facility for additional States alone. Most businesses expanding across States are in that position, so a clarification here would matter.

Changes to common information at State level. The CRI remains editable in each State-wise TRN. The advisory does not say whether an edit made in one State’s application flows back to the others. Where a State genuinely needs different particulars, such as a different authorised signatory, the edit is legitimate. Otherwise, changing common fields in one application risks the same PAN carrying different particulars in different States.

A second registration within one State. The facility is framed around selecting States and Union territories. A separate registration for another place of business within the same State is governed by section 25(2) and rule 11, and rule 11 requires a separate application in FORM GST REG-01 for that place of business. The advisory does not deal with that case.

Status of the advisory. The advisory is issued by GSTN to describe a portal functionality. It is not a notification or a circular, and it does not amend the CGST Rules. The rights and time limits that matter in a dispute continue to come from the Act and the Rules.

Before using the facility

The order of work follows from the advisory. The list of States in which registration is required, and the date of liability in each, comes first. The premises documents and State-specific details for every State are best assembled before the Master TRN is generated. The advisory does not say when the 15 days start, and the cautious assumption is that they run from generation. The CRI deserves a careful check before submission, because every State-wise application inherits any error in it. After that, each State-wise TRN and its acknowledgement need tracking on their own: the registrations will be granted, queried or delayed on their own timelines, and each resulting GSTIN is a distinct person with its own compliance from the date its registration takes effect.

This article is intended for educational purposes only and should not be construed as professional advice. It is based on the law as understood on the date of publication; laws and regulations are subject to change, and it may not reflect later developments. Readers are advised to consult a qualified tax professional on their specific situation before taking any action based on it. CA. Mohit Gaba takes no responsibility for any action taken or decision made on the basis of this article.