GST Registration explained: this guide covers what GST Registration means, who it applies to, the step-by-step process, documents required, fees, due dates and penalties in India — so you can stay compliant with confidence and avoid costly mistakes.
What is GST Registration?
GST registration is the process of obtaining a 15-digit Goods and Services Tax Identification Number (GSTIN) from the government. Once registered, a business is legally recognised as a supplier of goods or services under GST, and is entitled to collect GST from customers and claim input tax credit (ITC) on purchases.
GST registration is mandatory for businesses exceeding the prescribed turnover threshold, and for certain categories of businesses regardless of turnover. Operating without GST registration when required is a criminal offence with penalties up to ₹25,000 plus tax evaded.
- Goods suppliers: ₹40 lakh aggregate turnover (₹20 lakh for special category states)
- Service providers: ₹20 lakh aggregate turnover (₹10 lakh for special category states)
- Inter-state suppliers: Mandatory regardless of turnover
- E-commerce operators / sellers on Amazon, Flipkart etc.: Mandatory regardless of turnover
GST Registration Threshold Limit
| Category | Normal States | Special Category States* |
|---|---|---|
| Supplier of Goods | ₹40 lakh | ₹20 lakh |
| Supplier of Services | ₹20 lakh | ₹10 lakh |
| Supplier of Both (Goods + Services) | ₹20 lakh | ₹10 lakh |
| Composition Scheme (Goods) | ₹1.5 crore | ₹75 lakh |
| Composition Scheme (Services/Mixed) | ₹50 lakh | ₹50 lakh |
*Special category states: Manipur, Mizoram, Nagaland, Tripura, Meghalaya, Sikkim, Arunachal Pradesh, Uttarakhand, Himachal Pradesh, J&K (partially), Puducherry.
Who Must Compulsorily Register for GST?
The following categories must register regardless of turnover:
- Inter-state suppliers: Any person making taxable supply across state lines
- E-commerce sellers: Suppliers selling through online platforms (Amazon, Flipkart, Meesho, Swiggy, Zomato, etc.)
- E-commerce operators: Companies running e-commerce platforms
- Casual taxable persons: Non-residents who supply goods/services in India occasionally
- Reverse charge mechanism suppliers: Persons receiving services liable to RCM (e.g., import of services, legal services from advocate)
- TDS deductors under GST (Section 51): Government entities, PSUs, local authorities
- Input service distributors (ISD)
- OIDAR service providers: Foreign businesses providing online services to India
- Non-resident taxable persons
- Persons supplying through agents
Documents Required for GST Registration
For Proprietorship / Individual
| Document | Purpose |
|---|---|
| PAN Card of proprietor | Identity and tax identification |
| Aadhaar Card of proprietor | KYC and address proof |
| Photograph of proprietor | Registration |
| Bank account details (cancelled cheque / passbook) | Financial details |
| Electricity bill / rent agreement of business place | Principal place of business proof |
For Partnership Firm / LLP
- Partnership deed / LLP incorporation certificate
- PAN of firm and all partners
- Aadhaar and photographs of all partners
- Bank account of the firm
- Business address proof
For Private Limited / Public Limited Company
- Certificate of Incorporation (from MCA)
- PAN of company
- MOA and AOA
- PAN, Aadhaar, photograph of all directors
- Board resolution authorising signatory
- Company bank account details
- Registered office address proof
Additional Documents
- HSN codes for goods / SAC codes for services (have a list ready)
- Digital Signature Certificate (DSC) of authorised signatory — mandatory for companies and LLPs
GST Registration Process: Step-by-Step (2025-26)
Step 1: Go to GST Portal
Visit gst.gov.in  Services  Registration  New Registration.
Step 2: Fill Part A of Form GST REG-01
- Select taxpayer type (Regular, Composition, Casual, etc.)
- Enter state and district
- Enter legal name of business (as per PAN)
- Enter PAN number
- Enter email ID and mobile number (will receive OTPs)
- Submit — you get a Temporary Reference Number (TRN)
Step 3: Fill Part B Using TRN
Login again using TRN + OTP and fill Part B (within 15 days of getting TRN):
- Business details: trade name, business commencement date
- Promoters/partners/directors details
- Authorised signatory details
- Principal place of business address + proof
- Additional places of business (if any)
- Goods and services (add HSN/SAC codes)
- Bank account details
- State-specific information (for some states)
Step 4: Aadhaar Authentication
The authorised signatory (and proprietor/partners/directors) must authenticate using Aadhaar OTP or biometric verification. This step is mandatory from 2020 onwards.
- If Aadhaar is linked with mobile: OTP authentication
- If not linked: In-person biometric verification at GST Suvidha Kendra
Step 5: Submit Application (ARN Generated)
After uploading all documents and completing Aadhaar authentication, submit the application using:
- DSC (for companies and LLPs)
- EVC (Electronic Verification Code via Aadhaar OTP) — for individuals, proprietors, partners
- You receive an Application Reference Number (ARN)
Step 6: Verification by GST Officer
The GST officer reviews the application:
- If Aadhaar-authenticated: GSTIN is issued within 3 working days without site visit
- If not Aadhaar-authenticated: Officer may conduct physical verification — GSTIN issued within 30 days
- If officer needs clarification: Notice in Form GST REG-03 issued within 3 days; reply must be submitted within 7 days
Step 7: GSTIN Certificate Issued
Upon approval, you receive Form GST REG-06 — the GSTIN certificate with your 15-digit GSTIN. Download from GST portal. The registration is valid indefinitely (until cancelled or surrendered).
Understanding Your GSTIN
A GSTIN has 15 digits with a specific structure:
| Position | Digits | Meaning |
|---|---|---|
| 1–2 | 2 | State code (e.g., 07 = Delhi, 27 = Maharashtra) |
| 3–12 | 10 | PAN of the taxpayer |
| 13 | 1 | Entity number (1 = first registration in that state) |
| 14 | 1 | Always "Z" |
| 15 | 1 | Check digit (numeric or alphabetic) |
Example: 27AABCU9603R1ZM — Maharashtra-based company with PAN AABCU9603R, first registration.
Voluntary GST Registration
Businesses below the threshold can voluntarily register for GST. Benefits include:
- Claim input tax credit on purchases (reduce costs)
- Issue GST invoices — required by large corporate clients
- Expand to inter-state markets without legal issues
- Participate in government tenders (many require GSTIN)
- Build business credibility
Downside: Regular GST return filing compliance (GSTR-1, GSTR-3B monthly/quarterly). Evaluate before voluntarily registering.
Composition Scheme Registration
Small businesses with turnover up to ₹1.5 crore (goods) or ₹50 lakh (services) can register under the Composition Scheme:
- Pay GST at lower flat rates: 1% (traders), 2% (manufacturers), 5% (restaurants), 6% (services)
- File quarterly return (CMP-08) instead of monthly GSTR-3B
- Cannot issue tax invoice or collect GST from customers
- Cannot claim input tax credit
- Cannot make inter-state supply
GST Registration Fee
GST registration is completely free — no government fee. Professional/CA fees for assisted registration: ₹500 – ₹3,000 depending on complexity.
GST Registration for Specific Sectors
| Business Type | Registration Required? | Notes |
|---|---|---|
| Freelancer / consultant (services) | If turnover > ₹20L | Voluntary if below threshold but inter-state clients |
| Amazon / Flipkart seller | Mandatory — any turnover | Even ₹1 of sales requires GSTIN |
| Food delivery (Swiggy/Zomato) | Mandatory for restaurants | Platform collects TCS; restaurant must be registered |
| Export of goods/services | Mandatory — any turnover | GST on exports is zero-rated; refund of ITC available |
| Doctor / healthcare professional | Only if turnover > ₹20L | Healthcare services are exempt from GST |
| Real estate developer | Mandatory for construction | Under-construction properties are taxable |