How to gstin number
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Last updated: April 4, 2026
Key Facts
- GSTIN is a 15-digit alphanumeric number.
- It is mandatory for businesses with an annual turnover exceeding ₹40 Lakhs (₹20 Lakhs for special category states) to register for GST.
- The registration process is entirely online via the GST portal (www.gst.gov.in).
- Key documents required include PAN card, proof of business registration, identity and address proof of proprietor/directors, and bank account details.
- GSTIN helps in tracking tax liabilities, claiming Input Tax Credit (ITC), and ensuring compliance with tax laws.
What is a GSTIN?
The Goods and Services Tax Identification Number (GSTIN) is a unique identification number assigned to entities registered under India's Goods and Services Tax (GST) regime. It is a 15-digit alphanumeric code that serves as a cornerstone for tax administration, enabling the government to track transactions, manage tax collection, and ensure compliance. Every registered taxpayer under GST is issued a GSTIN, which must be quoted on all tax invoices, credit notes, debit notes, and other relevant documents issued by the business.
Why is GSTIN Important?
The GSTIN is crucial for several reasons:
- Tax Compliance: It enables businesses to file their GST returns accurately and on time, ensuring they meet their tax obligations.
- Input Tax Credit (ITC): Registered businesses can claim ITC on taxes paid on their purchases, which helps in reducing the overall tax burden. The GSTIN is essential for this process.
- Business Legitimacy: Possessing a GSTIN signifies that a business is legally recognized and compliant with tax regulations, enhancing its credibility with suppliers, customers, and financial institutions.
- Interstate Transactions: For businesses involved in interstate trade of goods or services, GST registration and the corresponding GSTIN are mandatory.
Who Needs to Register for GST and Obtain a GSTIN?
Generally, any business engaged in the supply of goods or services in India needs to register for GST and obtain a GSTIN if their aggregate annual turnover exceeds certain thresholds:
- For Suppliers of Goods: The threshold is ₹40 Lakhs (approximately USD 50,000) in most states.
- For Suppliers of Services: The threshold is ₹20 Lakhs (approximately USD 25,000) in most states.
- Special Category States: Some states, known as special category states (e.g., the North-Eastern states), have a lower threshold of ₹20 Lakhs for goods and ₹10 Lakhs for services.
Additionally, certain categories of businesses are required to register regardless of their turnover, including:
- Those making inter-state taxable supplies of goods or services.
- Casual taxable persons.
- Non-Resident taxable persons.
- Those liable to pay tax under reverse charge.
- E-commerce operators.
- Persons supplying goods or services through an e-commerce operator who is required to collect TCS.
- Input Service Distributors.
- Persons required to deduct tax at source (TDS) or collect tax at source (TCS) under GST.
How to Obtain a GSTIN: The Registration Process
The process for obtaining a GSTIN is primarily online and can be completed through the official GST portal of India (www.gst.gov.in). Here’s a step-by-step guide:
Step 1: Visit the Official GST Portal
Go to the official Goods and Services Tax portal: www.gst.gov.in.
Step 2: Navigate to the Registration Section
On the homepage, find and click on the 'Services' tab, then select 'Registration', and finally choose 'New Registration'.
Step 3: Fill in Basic Information
You will be asked to select your taxpayer type (e.g., Regular, Composition, etc.), state, district, legal name of the business (as per PAN), PAN of the business, email address, and mobile number. You will receive an OTP (One-Time Password) on your registered email and mobile number for verification.
Step 4: Temporary Reference Number (TRN) Generation
Upon successful verification, a Temporary Reference Number (TRN) will be generated. You will need this TRN to log in and continue with the application.
Step 5: Complete the Registration Form
Log in to the GST portal using your TRN and OTP. You will need to fill out various sections of the registration application form, which include:
- Business Details: Trade name, constitution of business (proprietorship, partnership, company, etc.), date of commencement of business.
- Promoter/Partners/Directors Details: Personal information, address, identity proof, and address proof of the promoters, partners, or directors.
- Principal Place of Business: Address of the main business location, proof of address (e.g., property tax receipt, electricity bill, lease agreement), and a photograph of the premises.
- Additional Places of Business (if any).
- Goods and Services: Details of the goods and services your business deals with (HSN/SAC codes).
- Bank Account Details: Bank account number, IFSC code, and type of account. You will need to upload a cancelled cheque leaf or a bank statement.
- State Specific Information: Depending on the state, additional details might be required.
Step 6: Document Upload
Upload scanned copies of all the required documents. Common documents include:
- PAN Card of the business entity.
- Proof of Principal Place of Business (e.g., latest property tax receipt, municipal corporation tax receipt, electricity bill, rent agreement, ownership deed).
- Identity proof of proprietor/partners/directors (e.g., PAN card, passport, driving license, Aadhaar card).
- Address proof of proprietor/partners/directors.
- Bank account details (cancelled cheque or bank statement).
- Proof of business registration (e.g., Certificate of Incorporation for companies, Partnership Deed for firms).
Step 7: Verification and Submission
After filling all details and uploading documents, you need to verify the application using a Digital Signature Certificate (DSC) for companies and LLPs, or through an EVC (Electronic Verification Code) via Aadhaar OTP for others. Submit the application.
Step 8: Application Reference Number (ARN)
Upon successful submission, an Application Reference Number (ARN) will be generated. You can track the status of your application using this ARN.
Step 9: Verification by Tax Authorities
The GST department will review your application and documents. They may ask for clarification or additional documents. In some cases, a physical verification of the business premises might be conducted.
Step 10: GST Certificate and GSTIN Issuance
Once the tax authorities are satisfied with the application, your GST registration will be approved. You will receive your GST Certificate, which contains your unique 15-digit GSTIN. This process typically takes a few business days to a couple of weeks, depending on the complexity and completeness of the application.
What if Information Changes?
If there are any changes in the business details (e.g., change in name, address, directors, constitution of business), you must report these changes to the GST authorities through amendments in your registration details on the GST portal within a specified period.
Conclusion
Obtaining a GSTIN is a fundamental step for businesses operating in India to ensure legal compliance, facilitate smooth transactions, and leverage the benefits of the GST regime. The online registration process, while requiring careful attention to detail and documentation, is designed to be efficient and transparent.
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