GST Amendment: Core vs Non-Core Fields Explained 2026

👉 Get your GST amendment filed correctly, first time → — our CA reviews your core/non-core classification before filing, so your application doesn't bounce back with a REG-03 query.

Every field in your GST registration falls into one of two buckets: core fields, which need a GST officer's approval before the change goes live, and non-core fields, which update the moment you submit them. Filing the wrong type — or treating a core-field change as routine — is the single biggest reason GST amendment applications get delayed or rejected.

Quick Answer: Core fields in GST registration are the legal business name (without PAN change), principal/additional place of business (within the same state), and addition or removal of partners/directors — these need GST officer approval within 15 working days. Non-core fields, like bank details, authorized signatory, or trade name, are auto-approved the moment you submit them, with no officer review at all.

What Is a Core Field in GST Registration?

A core field is a registration detail that defines your business's legal identity, so any change goes to a jurisdictional GST officer for verification before it takes effect. As per Rule 19 of the CGST Rules, 2017, the following are core fields:

1. Legal name of the business — only if the PAN itself doesn't change.

2. Principal Place of Business — any change other than moving to a different state.

3. Additional Place of Business — any change other than moving to a different state.

4. Addition or deletion of Partners/Directors/Karta/Managing Committee/CEO or other persons responsible for the day-to-day affairs of the business.

Core-field changes are filed using Form GST REG-14. Once submitted, a jurisdictional officer has 15 working days to approve it or issue a clarification notice in Form GST REG-03. If the officer takes no action within that window, the amendment is deemed approved automatically. Approval arrives as Form GST REG-15, and your updated registration certificate becomes downloadable from your dashboard.

One detail that trips people up: the amendment's effective date is the date you submitted REG-14, not the date the officer eventually approves it.

What Is a Non-Core Field in GST Registration?

A non-core field is any registration detail that isn't listed above — it updates automatically on submission, with zero officer review and no waiting period. Common non-core fields include:

• Trade name (as opposed to legal name)

• Mobile number and email ID of the authorized signatory (OTP-verified, but not officer-reviewed)

• Bank account details

• Addition, deletion, or modification of authorized signatory

• Modification of existing stakeholder details (other than adding/removing a partner or director)

• Nature of business activity / goods and services details (HSN/SAC additions)

If your change falls in this list, you'll typically see it reflected on your GST certificate within minutes of filing. Check your current status anytime on our GST Filing Status page.

Core vs Non-Core Fields: Quick Comparison

What Can't Be Amended At All?

PAN, the state/UT of registration, and any constitution-of-business change that alters the PAN cannot be amended — these require a fresh registration instead.

• PAN — since your GSTIN is derived from PAN, a PAN change means a brand-new GST registration.

• State or Union Territory of registration — GST is state-wise, so relocating your principal place of business to another state means surrendering the old GSTIN and registering fresh in the new state.

• Constitution of business, if it results in a new PAN (e.g., converting a proprietorship into a partnership or private limited company).

If you're in one of these situations, don't file a REG-14 that's guaranteed to get rejected. Start a fresh application on our GST Registration page, or talk to our team about sequencing the surrender and new registration correctly.

How Do I File a GST Amendment Online?

File a GST amendment by logging into the GST portal, opening the Core or Non-Core Fields amendment section, editing the relevant tab, and submitting with DSC/EVC verification. Here's the full sequence:

1. Log in to the GST portal and go to Services > Registration > Amendment of Registration Core Fields (or Non-Core Fields, depending on what you're changing).

2. Open the relevant tab and edit the details.

3. For core-field changes, enter the date of amendment and the reason for amendment — vague reasons are a common cause of REG-03 queries.

4. Upload supporting documents (see below).

5. Verify using DSC or EVC and submit. You'll get an ARN (Application Reference Number) — the tracking ID for your application — by SMS and email.

6. Track your application anytime using our GST ARN Status Check tool.

What Documents Are Required for a GST Amendment?

The documents needed depend on what you're changing: proof of the new detail (a rent agreement or electricity bill for a new address, a board resolution for a new director), ID and address proof of any newly added stakeholder, and a photograph of the new authorized signatory where applicable.

Why Do GST Amendments Get Rejected?

GST amendments most often get rejected for wrong core/non-core classification, address proof mismatches, missing board resolutions, or an unanswered REG-03 query. In detail:

• Wrong classification — treating a core-field change as non-core, or vice versa, and filing the wrong workflow.

• Address proof mismatch — the document doesn't match the exact address entered, or is older than 2 months.

• Missing board resolution when adding or removing a director/partner.

• No response to REG-03 within the stipulated time — an unanswered clarification query leads to automatic rejection.

• Filing a second core-field amendment while another is still pending — the portal won't accept a new one until the first ARN is resolved.

If your application has already been rejected once, check our GST Notices page for how to respond to a rejection or clarification notice correctly, so the resubmission doesn't fail for the same reason.

FAQs

What is the difference between core and non-core fields in GST registration?

Core fields — legal name, principal/additional place of business, and partner/director changes — need a GST officer's approval and can take up to 15 working days. Non-core fields, like bank details or authorized signatory, update automatically the moment you submit them.

How many days does a core field amendment take to get approved?

The jurisdictional officer has 15 working days to approve the application or raise a clarification in Form REG-03. If no action is taken in that window, the amendment is deemed approved automatically under Rule 19 of the CGST Rules, 2017.

Can I change the state on my GST registration through an amendment?

No. A change of state or union territory cannot be done through the amendment process. You need to surrender your existing GSTIN and apply for a fresh registration in the new state.

Is there a government fee for filing a GST amendment?

No, the GST portal does not charge any government fee for filing an amendment application, whether core or non-core.

What happens if I don't respond to a REG-03 clarification notice on time?

The amendment application is rejected if you don't respond within the time given in the notice. You'd then need to file a fresh REG-14 application, restarting the approval clock.

Can I file a non-core amendment while a core-field amendment is still pending?

Yes, non-core field amendments can generally still be filed while a core-field ARN is pending — but if the pending core amendment affects the same section, the portal may ask you to confirm before proceeding.

 

Work out whether your change is core or non-core before you touch the GST portal — it decides the form workflow, whether an officer reviews it, and how long you'll wait. Get the classification wrong and you're looking at a rejected ARN and a restart. If you'd rather not risk it, our CA team reviews every amendment before filing — start your GST amendment here → and get it right the first time.