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Authentication of Aadhaar number under the GST Act

By Annapoorna


Updated on: Apr 11th, 2023


12 min read

The Central Board of Indirect Tax and Customs (CBIC) had issued a notification on 23rd March 2020, about Aadhaar authentication for GST registration from 1st April 2020.

The same has been amended vide notification 62/2020 dated 20th August 2020 to be made optional. The aadhaar authentication for GST registration is not required for non-residents, persons other than citizens of India and persons who have already been registered under GST.

Latest Updates on GST registration

31st March 2023
1. CBIC notified that those who opted for Aadhaar authentication should complete the same while submitting the GST registration application. Also, earlier of the below shall be considered the date of submission of the application:
  - The date of Aadhaar authentication or 
  - 15 days from the submission of Part B of Form GST REG-01

2. Also, the department notified risk-based biometric aadhaar authentication for Gujarat via CGST notification 05/2023 with effect from 26th December 2022. 

21st December 2021 
From 1st January 2022, CBIC made the aadhaar authentication mandatory to apply for revocation of cancelled GST registration under the CGST Rule 23 in REG-21. 

29th August 2021 
Taxpayers can get extended time up to 30th September 2021 to revoke cancelled GST registration if the last date for the same falls between 1st March 2020 and 31st August 2021. It applies if the GST registration is cancelled under Section 29(2) clause (b) or (c) of the CGST Act via CGST notification number 34/2021 dated 29th August 2021. 

28th May 2021 
Due date to file application for revocation of cancellation of registration falling between 15th April 2021 up to 29th June 2021 is 30th June 2021.  

1st May 2021 
The time limit to take actions, reply or pass orders as given under Rule 9 of the CGST Rules, 2017 that falls between 1st May 2021 and 31st May 2021 has been extended up to 15th June 2021. 

5th March 2021 
The Search ARN Functionality for Registration, post-TRN Login has been enhanced for the taxpayers. 

What is Aadhaar Authentication?

Aadhaar authentication is a process by which the Aadhaar number along with other biometric details of the Aadhaar holder are submitted to the Central Identities Data Repository (CIDR) for verifying the user for his desired action. The CIDR verifies the correctness of data on the basis of information available with it.

The main purpose behind the Aadhaar authentication is to create an online platform wherein the identity of Aadhaar holders can be validated anytime anywhere. This will keep a check on the malpractices happening, in this case, under the Goods and Services Tax law.

GST law on Aadhaar Authentication for GST registration

At the time of GST registration, every applicant can opt for the Aadhaar authentication. The exceptions are persons exempted by the Central government under the CGST Act or those who must mandatorily undergo the Aadhaar authentication under section 25(6C) of the CGST Act, listed down in the next section.

The rule to opt-in or not for Aadhaar authentication will be applicable for applications made on or after 21st August 2020. However, between 1st April 2020 and 20th August 2020, all the applicants submitting registration application under GST had to mandatorily undergo Aadhaar authentication for obtaining registration.

The applicants who opt for it must submit the Aadhaar number along with the application for registration under GST. After this, they need to e-verify the same on the GST portal using the authentication link sent to the mobile number and email ID linked to the Aadhaar. It consists of an OTP that must be entered on the portal and it gets e-validated. Aadhaar authentication of the primary authorised signatory and at least one promoter or partner is necessary.

Note that in the cases of company/LLP/foreign company/AOP/Society/ Trust/Club, Aadhaar authentication of only the primary authorised signatory would be sufficient.

After this, whenever a taxpayer files his returns or uses any services on the GST portal, an OTP will be sent on the mobile number and email ID, which is linked to its Aadhaar number. Only after entering this OTP, a taxpayer can proceed to file the return.

If a person fails to do an Aadhaar authentication when opted or has not opted for it, proceed to file the application without the Aadhaar authentication steps given above. The registration will be granted only after a physical verification is done of the principal place of business by the GST officer. The officers can instead verify the e-KYC documents of the primary authorised signatory and any one of the promoters/partners on obtaining permission from the officer, not below the rank of Joint Commissioner and in writing.

In such cases, a notice in form GST REG-3 within 30 days from the date of submitting the application. The date of submission of the application is earlier than the below two:

  • Date of Aadhaar authentication
  • Date after counting 15 days from the submission of Part B of Form GST REG-01, being the registration application.

The assessee must reply within 7 working days from the date of receipt of notice in form GST REG-4. Once he replies, the officer must verify within the next 7 working days to approve the grant of registration. If the reply is not received within 7 working days from the applicant or he is not satisfied with the reply received, then the GST officer can reject the grant of registration in REG-05. If the officer fails to act within the timelines, the registration is deemed to be granted.

Earlier, the registration would be granted only on physical verification of principal place of business within 60 days from the date of application.

If the Aadhaar number is not allotted to a particular individual applying for registration under GST, then an alternate means of identification is made available to him like physical verification of place of business as per the CGST Rules.

Mandatory Cases of Aadhaar Authentication

As per Section 25(6C) of the CGST Act, the Aadhaar authentication is mandatory for the following class of individuals as per Rule 8 of the CGST Act in order to become eligible for the GST registration:

  • Authorised signatory of all types
  • Managing/authorised partners of a partnership firm
  • Karta of a Hindu Undivided Family


The only exception is if an individual is not a citizen of India or he is a person other than the one mentioned below: 

  • Individual
  • Authorised signatory of all types
  • Managing/authorised partners of a partnership firm
  • Karta of a Hindu Undivided Family

Biometric-based Aadhaar Authentication

The government amended Rule 8 (4A) of the CGST Rules via Notification No.27/2022 released on 27th December, 2022, providing for biometric-based Aadhaar authentication for granting GST registrations, starting with a pilot run in the state of Gujarat. This will be carried out together with a risk-based physical verification for persons identified on the GST portal, based on data analysis and risk parameters.

Now, the department notified the risk-based biometric Aadhaar authentication in Gujarat via CGST notification 05/2023.

Cases of Deemed approval of GST registration application

The application is deemed to be approved by the officer if that officer fails to take action within the timelines given against the following cases:

The person who has successfully completed Aadhaar authentication or 
the person is exempted from the Aadhaar authentication requirement.
3 working days from the date of submitting an application
The person who has opted but failed to complete Aadhaar authentication21 working days from the date of submission of the application to send the notice in form REG-3
The person has not opted for Aadhar authentication21 working days from the date of submitting an application
The person who has opted but failed to complete Aadhaar authentication, notice is issued in form GST REG-3 and the person has replied in REG-47 working days from the date of receipt of the response, information or the required documents

Steps for Aadhaar Authentication in GST Registration

The following steps must be followed to authenticate the aadhaar number at the time of applying for GST registration for the primary authorised signatory and any one of the promoters/partners mentioned on the application.

Step 1: While filling up Part-B of the application, go to the Aadhaar authentication tab and select ‘Yes’ as follows:

aadhaar authentication

If you select ‘No’, then a window appears as given below. You have to click the ‘OK’ button and upload e-KYC documents of the signatory and one promoter/partner. Proceed with the verification to complete the filing of the application.

aadhaar authentication

aadhaar authentication

aadhaar authentication

Step 2: The authentication link shall be sent to the registered mobile number and email ID mentioned in the application of both the primary authorised signatory and the particular promoter or partner, as the case may be. The link is valid for the next 15 days only.

Click on the link. A window opens up where the user must enter the aadhaar number and the OTP received on the mobile number and the email.

aadhaar authentication

A confirmation message will be displayed for successful authentication.

The user can get the authentication link once again anytime later by visiting the GST portal. Go to My Saved Applications> Aadhaar Authentication Status> RESEND VERIFICATION LINK to obtain the new link.

aadhaar authentication

Steps for Aadhaar Authentication for existing Taxpayers

Step 1: Login to the GST portal. Navigate to the “MY PROFILE” page. Go to Aadhaar Authentication Status. Two options appear.

aadhaar authentication

Step 2: Choose one of the two options – Send Aadhaar authentication link or upload e-KYC documents.

If the former is chosen, check the links received on the email ID and mobile number of the signatory and the particular promoter or partner, complete the OTP verification.

aadhaar authentication

aadhaar authentication

If the latter is chosen, the documents can be approved or rejected by the tax officer. The taxpayer will be considered e-KYC Authenticated and not Aadhaar Authenticated.

type of e-KYC document

aadhaar authentication

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About the Author

I preach the words, “Learning never exhausts the mind.” An aspiring CA and a passionate content writer having 4+ years of hands-on experience in deciphering jargon in Indian GST, Income Tax, off late also into the much larger Indian finance ecosystem, I love curating content in various forms to the interest of tax professionals, and enterprises, both big and small. While not writing, you can catch me singing Shāstriya Sangeetha and tuning my violin ;). Read more


Quick Summary

CBIC initially made Aadhaar authentication mandatory for GST registration but later amended it to be optional. The process involves submitting biometric details to CIDR. Exceptions include non-residents and certain individuals already registered under GST. Aadhaar authentication is mandatory for specific individuals but now includes biometric-based verification. Failure to authenticate may require physical verification by GST officers.

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