Changing your GST registration: core vs non-core fields, the 15-day rule and when you need a new GSTIN

Last updated 21 Oct 2026 · India

Short answer. Under Rule 19 of the CGST Rules, apply for amendment in Form GST REG-14 within 15 days of the change. Core fields (legal name, principal or additional place of business, adding or removing partners, directors or similar) need the officer's approval, normally within 15 working days. Non-core fields (for example bank account, goods/services details) are updated without approval. A change of PAN (e.g. proprietorship to company) needs a fresh registration, not an amendment.

Which bucket is your change?

Change	Type	Approval?
Legal name (PAN unchanged), trade name	Core	Officer
Principal / additional place of business address	Core	Officer
Partners, directors, Karta added or removed	Core	Officer
Bank account, HSN/SAC details, authorised signatory	Non-core	None
Email or mobile of primary authorised signatory	Non-core (OTP-verified)	None
PAN / constitution change that changes PAN	Not allowed	New registration

Steps

Services > Registration > Amendment of registration (core or non-core) on the GST portal.
Select the tab, edit, give the date and reason for change, upload proof (rent deed, electricity bill, board resolution).
Sign with DSC or EVC and track the ARN.
Answer any query (REG-03) within the time given.

Common mistakes

Moving office and updating GST months later. The 15-day rule applies, and officers may find you at the old address during verification.
Weak address proof. Mismatched names on rent deeds are the top query.
Trying to amend PAN. It cannot be done; apply afresh and plan the ITC transfer.
Forgetting e-way bill and e-invoice masters after a name or address change.

Checklist

Change date noted; REG-14 filed within 15 days
Core or non-core identified
Proof documents in the right names
ARN tracked; queries answered
Invoices, letterheads and ERP masters updated

Frequently asked questions

What is the time limit to amend GST registration?

Within 15 days of the change, in Form GST REG-14 (Rule 19, CGST Rules).

What are core fields in GST registration?

Legal name, principal and additional places of business, and addition or deletion of partners, directors or similar persons; these need officer approval.

Can I change PAN in GST registration?

No. A change that changes the PAN needs a fresh registration.

How long does the officer take to approve a core amendment?

Normally within 15 working days, by order in Form REG-15.

Official sources

Not tax or legal advice. This is a free explainer of public rules; deadlines and rules can change by notification, so confirm on the official portal or with your CA before you file. Last checked 21 Oct 2026.

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