What is GST Registration?
GST (Goods and Services Tax) is India’s biggest tax reform — a single unified tax that replaced over a dozen central and state taxes like VAT, Service Tax, Excise Duty, and CST. GST Registration is the process of enrolling your business on the GST portal (gst.gov.in) and obtaining a unique 15-digit GSTIN (GST Identification Number).
Simple Explanation: GST Registration is like getting a “tax identity card” for your business. Once registered, you can legally collect GST from customers, claim Input Tax Credit (ITC) on purchases, and file GST returns.
GSTIN
Unique 15-digit GST Identification Number issued to every registered taxpayer
Input Tax Credit
Claim back GST paid on your purchases — reduces your overall tax liability
Tax Invoice
Legally issue GST tax invoices to customers — required for B2B transactions
All India Operations
One registration covers inter-state supply and e-commerce across India
Who Needs GST Registration?
GST registration is mandatory in certain cases and optional (voluntary) in others. Here is a clear breakdown:
Mandatory Registration — Based on Turnover
| Business Type |
Threshold Limit |
Applicable States |
| Goods Supplier |
₹40 Lakhs per year |
Normal category states |
| Service Provider |
₹20 Lakhs per year |
Normal category states |
| Goods Supplier |
₹20 Lakhs per year |
Special category states* |
| Service Provider |
₹10 Lakhs per year |
Special category states* |
*Special category states: Manipur, Mizoram, Nagaland, Tripura, Meghalaya, Sikkim, Arunachal Pradesh, Uttarakhand, Himachal Pradesh
Mandatory Registration — Regardless of Turnover
| Category | Why Mandatory? |
|---|
| Inter-State Supplier | Selling goods/services to another state — must register regardless of turnover |
| E-Commerce Operator | Amazon, Flipkart sellers and operators must register mandatorily |
| Casual Taxable Person | Temporary supplier in a state where not normally registered |
| Non-Resident Taxable Person | Foreign person supplying in India |
| Reverse Charge Mechanism | Businesses receiving supplies subject to RCM |
| TDS/TCS Deductor | Govt. entities and e-commerce operators required to deduct/collect tax |
| Input Service Distributor | Distributing ITC among branches of the same company |
Voluntary Registration — Recommended Even Below Threshold
Even if your turnover is below the limit, voluntary GST registration is beneficial if: you supply to GST-registered businesses (they need your GSTIN for ITC), you want to claim ITC on your purchases, or you want to appear more credible and professional.
GST Tax Rate Slabs — At a Glance
Once registered, you need to charge GST at the correct rate. India has 5 main GST rate slabs:
0%
Nil Rate
Essential food, milk, eggs, fresh vegetables, books
5%
Low Rate
Packed food, footwear <₹1000, transport services
12%
Standard
Computers, mobiles, processed food, business hotels
18%
Standard
Most services (CA, IT, banking), restaurants, AC hotels
28%
High Rate
Luxury cars, tobacco, aerated drinks, casinos
CGST + SGST = GST: GST is split equally between Central and State government. For example, 18% GST = 9% CGST + 9% SGST. For inter-state supply, 18% IGST is charged instead.
Documents Required for GST Registration
The documents required depend on your type of business. Here is a complete checklist:
Proprietorship / Individual
PAN Card of proprietor
Aadhaar Card of proprietor
Address proof of business (electricity bill / rent agreement)
Cancelled cheque / bank passbook
Passport-size photograph
Digital Signature (DSC) — optional for proprietorship
Partnership Firm / LLP
Partnership deed / LLP Agreement
PAN Card of all partners
Aadhaar Card of authorised partner
Principal place of business proof
Bank account details of firm
Photos of authorised partner
Private Limited Company / OPC
Certificate of Incorporation (MCA)
PAN Card of company
MOA & AOA
Aadhaar & PAN of all directors
Registered office address proof
Digital Signature Certificate (DSC) — mandatory
Common for All: Address proof of principal place of business must be either (a) owned — property tax receipt / electricity bill, or (b) rented — rent agreement + NOC from landlord + any utility bill of owner.
Step-by-Step GST Registration Process
The entire GST registration process is done online on the GST portal. Here are the exact steps:
1
Visit GST Portal — gst.gov.in
Go to Services → Registration → New Registration. Select “Taxpayer” as type, choose your state and district.
5 minutes
2
Fill Part A — Get TRN
Enter your PAN number, mobile number, and email address. Verify OTP sent on mobile and email. You will receive a Temporary Reference Number (TRN) valid for 15 days.
10 minutes
3
Fill Part B — Business Details
Login with TRN → Fill complete business details: legal name, trade name, constitution, principal place of business, HSN/SAC codes for your goods/services, bank account details.
30–45 minutes
4
Upload Documents
Upload all required documents (PAN, Aadhaar, address proof, bank details, photos). Documents should be clear, below 1MB in size, in JPG or PDF format.
15–20 minutes
5
Submit Application with DSC / EVC
Companies must submit using DSC (Digital Signature Certificate). Individuals can use EVC (OTP-based Electronic Verification Code) or DSC. Submit the application — Application Reference Number (ARN) is generated.
5 minutes
6
GST Officer Verification
The GST officer reviews your application within 7 working days. They may approve directly or raise a query (GST REG-03 notice) asking for clarification or additional documents.
3–7 working days
7
GSTIN Issued — Registration Complete!
Upon approval, your unique 15-digit GSTIN is issued via email and SMS. Download your GST Registration Certificate (GST REG-06) from the GST portal. Display it at your place of business.
Same day as approval
Timeline & Fees
| Item | Details |
|---|
| Government Fee | ₹0 — Completely Free on the GST portal |
| Normal Processing Time | 3–7 working days after complete application |
| If Query Raised (REG-03) | You have 7 days to respond; add 7 more days for re-processing |
| TRN Validity | 15 days from date of TRN generation |
| Certificate Valid From | Date of liability (not date of application) |
| Professional Assistance (TSM) | Starting ₹999 — complete end-to-end service |
Good News: GST Registration is completely free on the government portal. You only pay professional fees if you engage a CA firm like Tax Service Mitra to handle the process for you.
What to Do After GST Registration
Getting your GSTIN is just the beginning. Here is what you must do after registration:
| Compliance | Frequency | Due Date | Penalty if Missed |
|---|
| GSTR-1 (Sales Return) | Monthly / Quarterly | 11th / 13th of next month | ₹50–₹200/day |
| GSTR-3B (Summary Return) | Monthly | 20th of next month | ₹50/day + 18% interest |
| GSTR-9 (Annual Return) | Yearly | 31st December | ₹200/day (max 0.5% turnover) |
| E-Way Bill | Per consignment >₹50,000 | Before goods movement | ₹10,000 or tax amount |
| Display GSTIN | Always | At place of business | May attract scrutiny |
Late Filing Penalty
- Nil return: ₹20/day (₹10 CGST + ₹10 SGST)
- Other returns: ₹50/day (₹25 CGST + ₹25 SGST)
- Maximum: ₹5,000 per return
- Interest on late tax payment: 18% per annum
Non-Filing Consequences
- GSTIN cancellation/suspension
- Blocked Input Tax Credit
- Unable to generate E-Way Bills
- Department notice and scrutiny
Regular vs Composition Scheme — Which is Better?
Small businesses with turnover below ₹1.5 crore (₹75 lakh for services) can opt for the Composition Scheme — a simpler, lower-tax option.
| Feature | Regular Scheme | Composition Scheme |
|---|
| Eligibility | All registered taxpayers | Turnover below ₹1.5 Cr (goods) |
| Tax Rate | Normal GST rates (5/12/18/28%) | 1% to 6% of turnover (flat) |
| Returns Filing | GSTR-1 + GSTR-3B monthly/quarterly | Only 1 quarterly return (CMP-08) |
| Input Tax Credit | ✓ Available | ✗ Not Available |
| Inter-State Supply | ✓ Allowed | ✗ Not Allowed |
| Issue Tax Invoice | ✓ Can issue | ✗ Only Bill of Supply |
| Compliance Burden | High — multiple monthly returns | Low — 1 quarterly return |
| Best For | B2B businesses, large turnovers | Small retailers, restaurants |
Our Recommendation: If you primarily sell to end consumers (B2C) and your turnover is below ₹1.5 crore, the Composition Scheme saves time and compliance cost. If you sell to GST-registered businesses (B2B), stay with the Regular Scheme so your customers can claim ITC.
Frequently Asked Questions
Can I register for GST voluntarily even if my turnover is below the limit?
Yes! Voluntary GST registration is allowed for any business regardless of turnover. It is beneficial if you supply to GST-registered businesses (they need your GSTIN), want to claim ITC on your purchases, or want to appear more professional and credible.
Can one person have multiple GST registrations?
Yes. Each state where you have a business presence requires a separate GST registration. Also, if you have multiple verticals (different business lines) in the same state, you can opt for separate registrations for each vertical.
What happens if I don’t register for GST despite being liable?
Operating without GST registration when mandatory attracts a penalty of 10% of tax due (minimum ₹10,000) or 100% of tax due in case of fraud. You could also face prosecution under GST law. Register immediately if you are above the threshold.
Is Aadhaar authentication mandatory for GST registration?
Yes, from January 2020, Aadhaar-based OTP authentication is required for GST registration. If Aadhaar is not available, physical verification of your business premises will be conducted by the GST officer before registration is granted.
Can I cancel my GST registration if I close my business?
Yes. If your turnover drops below the threshold or you close your business, you can apply for voluntary cancellation of your GSTIN on the GST portal (Form GST REG-16). You must file all pending returns before cancellation. The officer can also cancel your registration for non-filing of returns.
What is the HSN code and is it mandatory?
HSN (Harmonized System of Nomenclature) is a universal code to classify goods. SAC (Services Accounting Code) classifies services. You must mention HSN/SAC on invoices and GST returns. The number of digits required (4, 6, or 8) depends on your annual turnover. Tax Service Mitra helps you identify the correct HSN/SAC for your business.
Need Help with GST Registration?
Our qualified CA team handles end-to-end GST registration — from document collection to GSTIN issuance — accurately and quickly. Starting at just ₹999.
Related Articles
GST Return Filing Guide
GSTR-1, GSTR-3B, GSTR-9 — complete filing guide with due dates
GST Notice — What to Do?
Types of GST notices, how to respond, and how to avoid them
Input Tax Credit (ITC)
How to maximise ITC claims and avoid common mistakes
E-Way Bill Guide
When required, how to generate, and penalty for non-compliance