GST Registration in India: Process, Documents, Fees & Threshold Explained

Goods and Services Tax (GST) is India's unified indirect tax. If your business crosses the turnover threshold or sells across states, GST registration isn't optional — it's the law. Here's everything you need to know.

Who needs to register for GST?

You must register if:

• Your turnover exceeds ₹40 lakh for goods (₹20 lakh for services) in most states.
• You make inter-state supplies of goods.
• You sell through e-commerce marketplaces.
• You're a casual or non-resident taxable person.

Many businesses also register voluntarily to claim input tax credit and sell to GST-registered buyers.

Documents required

• PAN of the business and proprietor/directors
• Aadhaar of the proprietor or authorised signatory
• Proof of business registration or incorporation
• Address proof of the principal place of business
• Bank statement or cancelled cheque
• Photographs and a Digital Signature Certificate (for companies/LLPs)

The registration process

1. File application REG-01 on the GST portal with your details and documents.
2. Complete Aadhaar authentication.
3. An Application Reference Number (ARN) is generated.
4. The department verifies and, if satisfied, issues your GSTIN and certificate.

Fees and timeline

There's no government fee for GST registration. Professional handling at Big4India starts at ₹1,990 (excluding GST), and registration typically completes in 3–7 working days.

After registration

Once registered, you must file returns — usually GSTR-1 and GSTR-3B monthly or quarterly, plus the annual GSTR-9. Missing deadlines attracts late fees and 18% interest, and can block your input credit.

Note: Thresholds and rules differ for special-category states and specific sectors. When in doubt, confirm your obligation before you start invoicing.

Getting your GSTIN right — and filing on time every month — keeps your input credit flowing and your business penalty-free.