GST Registration in India: A Complete Step-by-Step Guide (2026)

If you're starting a business in India, GST registration is usually one of the first compliance steps you'll run into. It sounds bureaucratic, but the process itself is fully online and, once you know what's required, fairly quick. Here's what actually matters.

Who needs to register for GST?

Registration is mandatory once your business crosses certain turnover thresholds, though the exact limit depends on what you sell and where you're based:

• Goods suppliers: generally required once aggregate turnover crosses ₹40 lakh (₹20 lakh in special category states).
• Service providers: generally required once aggregate turnover crosses ₹20 lakh (₹10 lakh in special category states).
• Regardless of turnover: e-commerce sellers, businesses making inter-state supplies, and those required to pay tax under reverse charge must register from day one.

Many businesses also register voluntarily below the threshold — it lets you claim input tax credit and issue GST-compliant invoices, which larger clients often expect.

Documents you'll need

• PAN card of the business/proprietor
• Aadhaar card of the applicant
• Proof of business address (electricity bill, rent agreement or NOC from the owner)
• Bank account details (cancelled cheque or bank statement)
• Passport-size photograph of the proprietor/partners/directors
• Digital Signature Certificate (mandatory for companies and LLPs)
• Certificate of incorporation and MOA/AOA (for companies) or LLP agreement (for LLPs)

The registration process

1. Create a GST application on the GST portal with your PAN, mobile number and email — you'll receive an OTP-verified Temporary Reference Number (TRN).
2. Fill Part B of the application using the TRN, uploading the documents listed above along with business details and bank information.
3. Aadhaar authentication — most applicants now complete e-KYC via Aadhaar OTP, which speeds up approval.
4. Verification — a GST officer may seek clarification or, in some cases, conduct a physical verification of the business premises.
5. GSTIN issued — once approved, you receive your 15-digit GST Identification Number and registration certificate (Form GST REG-06).

In practice, straightforward applications with complete documentation are approved within 7 working days; cases flagged for physical verification can take longer.

Common mistakes that delay approval

• Address proof that doesn't match the business name or is older than the portal's accepted window
• Using a personal bank account instead of the business's operating account
• Mismatched name spelling between PAN, Aadhaar and the application
• Selecting the wrong business constitution (proprietorship vs partnership vs company)

After registration: what changes

Once registered, you're required to issue GST-compliant invoices, file periodic returns (monthly or quarterly depending on your scheme), and reconcile input tax credit regularly. Missing return deadlines attracts late fees and interest, even if there's no tax payable — so most businesses prefer to hand off ongoing filing to a GST practitioner rather than manage it in-house.