Goods and Services Tax (GST) is the backbone of indirect taxation in India, and registering under it is a legal requirement for millions of businesses. Yet many entrepreneurs remain confused about when GST registration becomes mandatory, what documents they need, and how long the process actually takes. Getting it wrong can mean penalties, blocked input tax credit, or lost B2B contracts.
This guide breaks down the entire GST registration process in India - the turnover thresholds, who must register, the documents you will need, the fees involved, and a clear step-by-step walkthrough of the online application on the GST portal. By the end, you will know exactly how to get your GSTIN without unnecessary delays.
What is GST registration?
GST registration is the process by which a business is recognised under the GST law and issued a unique 15-digit Goods and Services Tax Identification Number (GSTIN). Once registered, a business can legally collect GST from customers, claim input tax credit on purchases, and file GST returns.
A GSTIN is essential for:
- Issuing tax-compliant invoices
- Claiming input tax credit (ITC)
- Selling on e-commerce platforms
- Winning contracts with larger, GST-registered clients who require compliant vendors
Who needs GST registration?
GST registration becomes mandatory once your business crosses the prescribed turnover threshold, or if it falls into a specific category regardless of turnover.
Turnover-based thresholds (standard):
- Rs 40 lakh aggregate annual turnover for businesses supplying goods (Rs 20 lakh in special category states).
- Rs 20 lakh aggregate annual turnover for businesses supplying services (Rs 10 lakh in special category states).
Mandatory registration regardless of turnover applies to categories such as:
- Inter-state suppliers of goods
- E-commerce operators and sellers supplying through e-commerce platforms
- Businesses liable to pay tax under reverse charge
- Casual taxable persons and non-resident taxable persons
- Input service distributors and agents supplying on behalf of others
Even if you are below the threshold, you can opt for voluntary registration to claim input tax credit and appear more credible to business clients.
Documents required for GST registration
The exact documents depend on your business structure. Below is a quick reference.
| Business type | Key documents required |
|---|---|
| Sole proprietor / individual | PAN and Aadhaar of proprietor, photograph, bank details, business address proof |
| Partnership firm / LLP | Partnership deed / LLP agreement, PAN of firm, partners' PAN & Aadhaar, address proof |
| Private limited / company | Certificate of Incorporation, PAN of company, MOA & AOA, directors' PAN & Aadhaar, board resolution |
| All types | Proof of principal place of business, bank account proof, digital signature (for companies/LLPs) |
Common address and bank proofs include:
- Electricity bill, property tax receipt, or rent agreement with NOC for the business premises
- Cancelled cheque, bank statement, or first page of passbook
- Passport-size photographs of the proprietor, partners, or directors
GST registration fees
The government does not charge a fee for GST registration on the official portal - it is free of cost. However, most businesses engage a Chartered Accountant or GST practitioner to ensure the application is filed correctly the first time, in which case a professional service fee applies. This is often money well spent, because a rejected or clarification-flagged application can delay your GSTIN by weeks.
Step-by-step GST registration process (online)
The entire process is completed online through the official GST portal. Here is how it works.
Step 1: Generate a Temporary Reference Number (TRN). Visit the GST portal and select New Registration under the Services tab. Enter your PAN, mobile number, and email. After OTP verification, you receive a Temporary Reference Number (TRN) to continue the application.
Step 2: Fill Part B of the application. Log in with the TRN and complete the detailed application form. This covers business details and constitution, promoter/partner/director information, authorised signatory details, principal and additional places of business, goods and services supplied (with HSN/SAC codes), and bank account details.
Step 3: Upload documents. Upload the required documents in the prescribed format and file size - identity proofs, address proofs, bank details, and photographs.
Step 4: Verify via DSC or EVC. Submit the application using a Digital Signature Certificate (DSC) - mandatory for companies and LLPs - or through Electronic Verification Code (EVC) / e-Sign for other business types.
Step 5: Aadhaar authentication. Aadhaar authentication of the promoter or authorised signatory helps speed up approval. If you skip Aadhaar authentication, the department may conduct physical verification of your premises, which can extend the timeline.
Step 6: ARN generation and GSTIN allotment. After submission, you receive an Application Reference Number (ARN) to track status. Once the officer verifies and approves the application, your GSTIN and registration certificate (Form GST REG-06) are issued and can be downloaded from the portal.
Timeline for GST registration
With successful Aadhaar authentication and complete documents, GST registration is typically approved within a few working days (commonly 7 working days). If Aadhaar authentication is not opted for, or the officer raises a query, the process can take longer due to physical verification or the need to respond to a notice seeking clarification. Responding promptly and accurately to any query keeps things moving.
Common reasons for rejection
Avoid these frequent mistakes that lead to delays or rejection:
- Mismatch between PAN details and the name entered
- Blurred or incorrectly formatted document uploads
- Address proof that does not match the declared place of business
- Missing NOC from the property owner for rented premises
- Not responding to the department's clarification notice in time
Frequently Asked Questions
What is the turnover threshold for GST registration?
For most states, registration is mandatory when aggregate turnover exceeds Rs 40 lakh for goods suppliers and Rs 20 lakh for service providers. Special category states have lower limits of Rs 20 lakh and Rs 10 lakh respectively.
Is GST registration free?
Yes, the government charges no fee for GST registration on the official portal. You may pay a professional service fee if you engage a CA or GST practitioner to file on your behalf.
How long does GST registration take?
With Aadhaar authentication and complete documents, approval usually happens within a few working days (commonly around 7 working days). Without Aadhaar authentication, physical verification may extend the timeline.
Can I register for GST voluntarily below the threshold?
Yes. Voluntary registration lets you claim input tax credit and improves credibility with B2B clients who prefer GST-compliant vendors, even if your turnover is below the mandatory limit.
What happens if I do not register when required?
Operating without registration when it is mandatory can attract penalties, interest, and denial of input tax credit. You may also lose contracts with clients who require GST-compliant invoices.
Why choose Regikart
GST registration looks simple until a small document error stalls your application for weeks. At Regikart, our in-house Chartered Accountants handle the entire GST registration process for you - verifying documents, filing the application correctly, managing Aadhaar authentication, and responding to any departmental queries.
Once you have your GSTIN, the returns start. Our GST return filing guide explains GSTR-1 and GSTR-3B, and our team can handle those filings for you too. With offices in Kolkata, Delhi, Gurugram, and Pune and clients across India, we help you get your GSTIN quickly and stay compliant thereafter. Focus on your sales; we will keep your indirect tax compliance airtight.
About the author
Rohit
Senior Advisor at Regikart. Want to discuss this in the context of your business?
