GST Registration explained: this guide covers what it 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.
Every person who is liable to be registered under Section 22 or 24 of the CGST Act 2017 must apply for GST registration within 30 days of becoming liable. Registration is done online at the GST portal (gst.gov.in) using Form REG-01.
Who Must Register for GST?
| Category | Threshold / Condition |
|---|---|
| Goods supplier (regular states) | Aggregate turnover > Rs.40 lakh |
| Service provider (regular states) | Aggregate turnover > Rs.20 lakh |
| Special category states (Mizoram, Manipur, etc.) | Rs.10–20 lakh |
| Inter-state supplier | Mandatory regardless of turnover |
| E-commerce operators | Mandatory regardless of turnover |
| Casual taxable person | Before making any supply |
Documents Required
Proprietorship
- PAN card of proprietor
- Aadhaar card of proprietor
- Photo of proprietor
- Business address proof (electricity/water bill/rent agreement not older than 2 months)
- Bank account proof (cancelled cheque / bank statement)
Partnership / LLP
- PAN of firm
- Partnership deed / LLP Agreement
- PAN + Aadhaar + Photo of all managing partners
- Authorization letter designating one as authorized signatory
- Firm's address and bank proof
Private/Public Limited Company
- PAN of company
- Certificate of Incorporation
- MOA and AOA
- PAN + Aadhaar + Photo of directors
- Board Resolution for authorized signatory
- Company bank statement/cancelled cheque
Online Registration Process (Form REG-01)
- Visit gst.gov.in → Services → Registration → New Registration
- Select taxpayer type (Regular/Composition/Casual etc.)
- Enter PAN, mobile number, email — OTP verification
- Receive Temporary Reference Number (TRN)
- Complete Part B of REG-01 using TRN: fill business details, add promoters/directors, upload documents
- Aadhaar authentication (OTP to registered Aadhaar mobile)
- Submit using DSC (companies/LLPs) or EVC (others)
- Receive Application Reference Number (ARN)
- GST officer processes: approves (3 days) or seeks clarification via SCN (show cause notice REG-03) → respond in REG-04 within 7 days
- GSTIN issued and GST Certificate (REG-06) downloadable from portal
Understanding GSTIN Structure
Example: 27AABCC1234D1Z5
| Digits | Meaning | Example |
|---|---|---|
| 1-2 | State code | 27 = Maharashtra |
| 3-12 | PAN of taxpayer | AABCC1234D |
| 13 | Entity number (multiple GSTINs same PAN same state) | 1 |
| 14 | Default Z | Z |
| 15 | Check digit | 5 |
Post-Registration Compliance
- Display GSTIN and registration certificate at place of business
- Issue GST-compliant tax invoices (with GSTIN, HSN code, rate, tax amount)
- File GSTR-1 (outward supplies) and GSTR-3B (summary + payment) monthly or quarterly
- File GSTR-9 (annual return) by 31 December each year
- Maintain records for 72 months (6 years) — Section 36 CGST Act
Amendment and Cancellation
- Amendment (REG-14): For changes in address, addition of business place, change in business name — within 15 days of change
- Voluntary cancellation (REG-16): If turnover falls below threshold or business closes — officer decides within 30 days
- Revocation (REG-21): If cancelled by officer and taxpayer wishes to continue — apply within 30 days of cancellation order
Need Expert Help?
Our CA and legal experts at TaxClue are ready to assist you with compliance, filings, and advisory.
Get Free ConsultationKey Facts About GST Registration
- Applies in: All states across India, under the relevant central law.
- Mode: Mostly online via the official government portal.
- Typical timeline: Ranges from a few days to a few weeks depending on the case.
- Non-compliance: May attract penalties, interest or late fees.
- Expert help: TaxClue completes the entire process end to end for you.
How long does GST registration take?
If all documents are in order, registration is granted within 3 working days (Section 22, CGST Act). If clarification is sought, the officer has 21 days; applicant must respond in 7 days.
What documents are required for GST registration?
PAN of business/proprietor, Aadhaar of authorized signatory, address proof (electricity bill/property tax), bank statement with cancelled cheque, business registration proof (MOA/Partnership deed/etc.), photo of proprietor/partners/directors.
Over 90% of compliance penalties in India arise from missed due dates — timely handling can save businesses thousands of rupees each year.
GST Registration: a key compliance topic in Indian tax and corporate law that businesses and individuals must understand to remain compliant.
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Why This Matters
Staying compliant with Indian regulations protects your business from penalties, interest and unnecessary legal trouble. It is always wise to maintain proper records and documentation so that any future scrutiny can be handled smoothly. Rules and thresholds in gst are revised periodically, so it helps to review your obligations at the start of each financial year. Professional guidance from a qualified CA, CS or advocate ensures that filings are accurate and submitted well before the due date.