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You apply for GST registration online through the GST Common Portal in two stages: complete Part A to verify your PAN, email and mobile number, then use the temporary reference number (TRN) to complete Part B of FORM GST REG-01, upload the required documents, complete the Aadhaar step shown by the portal, and submit. The proper officer generally has three working days to approve an application that is in order; if clarification is requested in REG-03, you normally have seven working days to reply in REG-04.
This guide explains the standard online process. It cannot determine whether your particular business must register or which taxpayer category applies; that depends on turnover, supplies, business structure, location and other facts under current GST law.
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What FORM GST REG-01 is—and what it does not decide
FORM GST REG-01 is the online application used to apply for GST registration in India. It is a two-part process rather than a single upload-and-submit screen:
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- Part A: identifies the applicant and verifies the PAN, primary authorised signatory’s email address and mobile number.
- Part B: captures the business, people, premises, goods and services, state-specific information, Aadhaar authentication and final verification details.
Submitting REG-01 does not by itself establish that registration is mandatory. Whether you should register, whether voluntary registration is appropriate, and which taxpayer type to select depend on your legal facts. Turnover, the nature and location of supplies, the constitution of the business and other statutory conditions can change the answer. Check the current eligibility rules or obtain advice from a qualified GST professional before selecting a category.
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Before you start: information and documents to have ready
Preparation prevents the most common interruptions: mismatched PAN data, an email or phone that cannot receive an OTP, and incomplete proof for the principal place of business. Gather the following for the applicant and the business.
Identity and contact details
- The legal name exactly as it appears in the PAN records.
- The PAN of the person or entity applying.
- The primary authorised signatory’s working email address and mobile number. Both must be available for separate OTP verification.
- Details of the business constitution, such as proprietorship, partnership, company, trust or another applicable form.
- Promoter, partner, director or other responsible-person details that the form asks for.
Premises evidence
The documents depend on how you occupy the principal place of business. Keep clear, legible copies and use the category that reflects the real arrangement.
| Premises arrangement | Evidence identified in the portal guidance | Important qualification |
|---|---|---|
| Owned premises | Property-tax receipt, municipal khata or electricity bill | Use an ownership document that clearly establishes the applicant’s right to the premises. |
| Rented or leased premises | Valid rent or lease agreement plus evidence of the lessor’s ownership | Ensure the agreement and ownership evidence relate to the same premises and parties. |
| Consent, shared or other permitted use | Consent letter plus evidence of the consenter’s ownership | The consent arrangement and ownership evidence must support the address being declared. |
The exact list can vary with the business and premises. CBIC’s Instruction No. 03/2025-GST says that, for ownership evidence, “any one of the documents mentioned in the said list or any similar document such as water bill or any other document prescribed under the State or the local laws which clearly establishes the ownership of the premises submitted by the applicant should suffice.” That does not make every document interchangeable in every case: use the provision that matches your arrangement and the current form’s instructions.
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Other records to organize
- Details of the principal and additional places of business.
- A description of the goods and services supplied, including the relevant classification information requested by the portal.
- Authorised representative information, if one is appointed.
- State-specific information and any documents required for the selected business type.
- A device and browser that can open downloaded acknowledgements and upload readable files.
How to apply online through Part A
- Open the GST Common Portal. Go to
gst.gov.inand choose Services > Registration > New Registration. The portal may also present a Register Now route. - Select the applicant category and location. Choose the taxpayer type offered for your case, then select the relevant State or Union Territory and district. Do not choose a category merely because it is the first option; the correct category depends on your business facts.
- Enter the legal name and PAN. Type the legal name exactly as recorded against the PAN. A spelling, punctuation or entity-name mismatch can prevent validation or create later corrections.
- Enter the primary authorised signatory’s email and mobile number. Use contact details that can receive messages immediately. The rules provide for separate online verification of the mobile number and email address.
- Complete both OTP checks. Enter the OTP sent to the mobile phone and the OTP sent to the email address when prompted. If a message does not arrive, confirm the number or address, check spam or message blocking, and use the portal’s resend option rather than opening multiple applications.
- Save the temporary reference number. After successful Part A verification, the portal issues a temporary reference number (TRN). Record it securely with the date and contact details used. You need the TRN to return to the unfinished application and complete Part B.
How to complete Part B with the TRN
Return to the registration service and use the TRN to open the saved application. The portal guide presents a series of tabs. Complete the tabs that apply to your business; do not add people, premises or activities that are not part of the application.
Business details
Enter the trade name, constitution, commencement and other business information requested. Keep the legal name, PAN and constitution consistent with the supporting records. Where the form asks whether registration is based on a particular statutory reason or is voluntary, select the answer supported by your circumstances rather than guessing.
Promoters, partners and other responsible persons
Add the people required for the selected constitution. Check names, PAN details, addresses and roles before saving. A company, partnership, trust and proprietorship do not use the same person fields, so follow the labels displayed for your category.
Authorised signatory
Identify the primary authorised signatory and provide the requested contact and identity information. The signatory should be able to complete OTP, Aadhaar and verification actions and respond to any notice.
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Authorised representative
Complete this tab only when the business has an authorised representative. Enter the representative’s details exactly as supported by the authorization arrangement and upload any document the current portal requests.
Principal and additional places of business
Enter the full address of the principal place first, then add each additional place that belongs in the registration. Select the premises type accurately—owned, rented or leased, consent/shared, or another applicable arrangement—and upload evidence for that selection.
Goods and services
List the principal goods and services and the classifications requested by the portal. Use descriptions that match what the business actually supplies. Omitting a major line of business can create avoidable amendments; adding unrelated activities can create questions during verification.
State-specific information
Some fields and documents are specific to the selected State or Union Territory. Complete the fields shown for your location and read any on-screen instructions before proceeding.
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Review every tab, confirm the declaration and use the verification method made available for the applicant. Check that names, addresses, PAN details and uploaded files are internally consistent before submitting.
Choosing and proving the principal place of business
Address evidence is one of the most frequent reasons an application is held for clarification. The officer needs evidence that the declared premises exist and that the applicant is entitled to use them for the business. Match the document to the arrangement instead of uploading a generic bill.
Owned property
Use one document from the prescribed list—such as a property-tax receipt, municipal khata or electricity bill—or a similar locally prescribed document that clearly establishes ownership. CBIC’s 2025 processing instruction says one satisfactory ownership document should generally suffice; an officer should not unnecessarily demand a bundle when the submitted document establishes ownership.
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Rented or leased property
Upload a valid rent or lease agreement and evidence of the lessor’s ownership. Check that the address, lessor, lessee and term are readable and consistent. If the lease is unregistered, the 2025 CBIC instruction describes cases in which the lessor’s identity proof is also relevant; follow the applicable paragraph and the current portal request rather than assuming that every unregistered lease has identical requirements.
Consent, shared or other premises
Use a consent letter from the person entitled to permit use, together with evidence of that person’s ownership. For shared premises or cases without a conventional lease, the consent and ownership records should explain why the applicant may use the address. CBIC’s instruction also discusses evidence for certain arrangements without a lease. Keep the documents tied to the actual relationship and premises.
When a document is not accepted
- The bill or receipt is for a different address, owner or unit.
- The agreement has expired, is illegible or does not identify the parties.
- The consent letter does not identify the premises or the consenting owner.
- The document proves occupancy but not the ownership or permission relevant to the selected category.
- The upload is incomplete or unreadable.
If the portal or officer asks for clarification, provide the document that addresses the specific gap. Do not substitute unrelated documents simply because they are easier to obtain.
Aadhaar authentication: OTP or biometric route
The portal may send an applicant through Aadhaar authentication. The GSTN portal guidance describes both OTP-based and biometric routes, and the route can depend on the case. Follow the prompt assigned to the application instead of assuming that an OTP option will always be available.
OTP-based authentication
Where the portal offers OTP authentication, use the Aadhaar-linked mobile number and enter the OTP within the displayed validity period. Make sure the person whose Aadhaar is being authenticated is the person identified in the application.
Biometric authentication
Where biometric authentication is assigned, follow the portal’s instructions for the designated centre or appointment process and carry the identity documents it specifies. Do not treat a pending biometric step as a completed application step.
Watch the 15-day link expiry
The GSTN FAQ states that the Aadhaar link must be used within 15 days of submitting Part B or it expires. The portal may show the applicable deadline and next action. Complete the link promptly and check the live instructions if the link has expired, because operational procedures can change.
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Submit the application and keep the evidence
- Finish the review and verification tabs in Part B.
- Submit using the authentication method displayed by the portal.
- Save the acknowledgement, application reference and any downloadable receipt.
- Record the submission date, TRN and contact details used for alerts.
- Continue checking the portal for status changes, acknowledgements and notices.
Under the registration rules, an electronic acknowledgement is issued in REG-02. Keep the acknowledgement with the submitted documents; it is the clearest record of when the application entered the process.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How long GST registration takes and what happens next
The Central Goods and Services Tax Rules set out different paths after submission.
| Situation | Portal or rule action | Applicant deadline |
|---|---|---|
| Application and documents are found in order | The proper officer should approve the grant of registration within three working days from submission. | No response is required unless the portal asks for one. |
| Clarification or additional documents are needed | The officer may issue a notice in REG-03 within three working days. | Reply in REG-04 within seven working days after receiving the notice. |
These are rule-based working-day periods, not a promise that every case will finish in the same elapsed number of calendar days. Monitor the portal and the registered email and mobile number. Missing a REG-04 deadline can leave the application unresolved or expose it to an adverse decision under the applicable rules.
What to include in a REG-04 reply
- Answer each question in REG-03 separately and in the same order.
- Upload the exact missing or corrected document, not a duplicate that leaves the issue unresolved.
- Explain any address, name or ownership difference briefly and attach supporting evidence.
- Submit within seven working days of receiving the notice and save the submission proof.
Common problems and practical fixes
PAN validation fails
Recheck the PAN, legal name and constitution against the PAN records. Avoid using a trade name where the form asks for the legal name. If the PAN itself is incorrect or inactive, resolve that issue through the appropriate authority before restarting the application.
OTP does not arrive
Confirm network access, the phone number and email spelling, and the spam or blocked-message folders. Use the portal’s resend control after the timer permits it. Do not create several Part A applications with different contact details unless you intend to abandon the earlier TRN.
The TRN is lost
Use the portal’s TRN retrieval or saved-application option if available, using the same verified contact details. Keep screenshots or a written record of the TRN when Part A is completed.
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Identify whether the problem is ownership, permission to use the premises, an expired agreement, a mismatch in address or poor readability. Replace the file with the document that proves the missing element. For rented, shared or consent premises, provide the agreement or consent and the connected ownership evidence required for that arrangement.
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Aadhaar authentication expires
Check the application status and the current portal instructions. The GSTN FAQ’s 15-day rule applies to using the Aadhaar link after Part B submission; an expired link may require the portal’s stated re-initiation step.
A REG-03 notice arrives
Open the notice promptly, list every requested clarification, and submit a complete REG-04 response within seven working days. A partial answer can lead to another delay even when the original issue was narrow.
Final pre-submission checklist
- Legal name and PAN match the PAN records exactly.
- Primary authorised signatory’s email and mobile can receive OTPs.
- The selected taxpayer type and State or Union Territory fit the business facts.
- Promoters, partners, directors and signatory roles are complete and accurate.
- Principal and additional premises are entered with the correct occupancy category.
- Ownership, lease, consent and related evidence is legible and internally consistent.
- Goods and services reflect the business’s actual activities.
- State-specific fields and required uploads are complete.
- The Aadhaar route shown by the portal is completed or scheduled within the displayed deadline.
- TRN, acknowledgement and submission evidence are saved.
Key points to remember
REG-01 begins with verified identity and contact details in Part A and continues through the TRN into the detailed Part B application. The quality of your premises evidence matters as much as the data entry: owned, rented, leased, shared and consent arrangements call for different supporting records. Complete the Aadhaar step shown by the portal, use the link before its displayed expiry, and monitor for REG-02 or a REG-03 notice. If a notice is issued, the rules give seven working days for the REG-04 reply.
For eligibility, category selection or an unusual premises arrangement, rely on the current official GST rules and portal instructions or consult a qualified GST professional. The online form can process an application; it cannot decide the legal facts for you.
Frequently Asked Questions
How do I apply for GST registration online?
Start at gst.gov.in under Services > Registration > New Registration, complete Part A and its PAN, email and mobile OTP checks, save the TRN, then return to complete Part B, upload the applicable documents, follow the Aadhaar route shown by the portal and submit.
What documents are needed for GST registration?
You need identity and business details plus premises evidence suited to the arrangement: an ownership document for owned premises, a valid rent or lease agreement with the lessor’s ownership evidence for rented premises, or a consent letter with the consenter’s ownership evidence for consent or shared premises. The portal may request additional documents for the business type or State.
How long does GST registration take?
If the application is found in order, the proper officer should approve it within three working days under the registration rules. If REG-03 clarification is issued, submit REG-04 within seven working days of receiving the notice; the total elapsed time can therefore be longer.
Is Aadhaar authentication compulsory for every applicant?
The portal assigns the applicable route and may use OTP-based or biometric Aadhaar authentication depending on the case. Follow the prompt shown for your application and use the Aadhaar link within 15 days of Part B submission, as stated in the GSTN FAQ.
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