What Is Compulsory GST Registration?
Compulsory GST registration is a mandatory GSTIN obtained by a business or individual because they fall into a category the CGST Act specifically requires to register — regardless of turnover. This is different from threshold-based registration, which depends purely on annual sales. Even a business earning far below the ₹40 lakh or ₹20 lakh exemption limit must register compulsorily if it supplies goods across state lines, sells through an e-commerce platform, or is liable to pay tax under reverse charge.
Once a business is legally required to register, operating without a GSTIN is treated as non-compliance under Section 22 and Section 24 of the CGST Act, 2017, and attracts financial penalties along with the inability to collect tax or claim Input Tax Credit.
Who Must Register Under GST Compulsorily?
The following categories are required to obtain GST registration irrespective of their turnover, as specified under Section 24 of the CGST Act:
Turnover-Independent Categories
- Persons making inter-state taxable supply of goods or services
- Casual taxable persons undertaking occasional supply
- Non-resident taxable persons operating in India
- Persons liable to pay tax under Reverse Charge Mechanism (RCM)
- Input Service Distributors (ISD)
- Agents supplying goods/services on behalf of another taxable person
Platform & E-Commerce Categories
- Every e-commerce operator (marketplace owner)
- Sellers supplying through Amazon, Flipkart, Meesho and similar platforms
- Persons required to deduct TDS under GST (select government bodies)
- Online Information & Database Access Retrieval (OIDAR) service providers from outside India
- Persons supplying online money gaming from outside India
Penalty for skipping mandatory registration: Section 122 of the CGST Act imposes a penalty of ₹10,000 or 100% of the tax due, whichever is higher, on any person required to register who fails to do so.
Turnover Limits for General (Non-Compulsory) GST Registration
Where compulsory categories above don't apply, registration is still required once annual turnover crosses these limits:
| Business Category | General States | Special Category States |
|---|---|---|
| Supplier of Goods | ₹40 Lakhs per annum | ₹20 Lakhs per annum |
| Supplier of Services | ₹20 Lakhs per annum | ₹10 Lakhs per annum |
| E-Commerce Seller | No threshold — mandatory | No threshold — mandatory |
| Inter-State Supplier | No threshold — mandatory | No threshold — mandatory |
| Casual / Non-Resident Taxable Person | No threshold — mandatory | No threshold — mandatory |
Documents Required for Compulsory GST Registration
For Proprietor / Individual
- PAN Card and Aadhaar Card of the proprietor
- Passport-size photograph
- Active email ID and mobile number
- Business address proof (electricity bill / rent agreement / NOC)
For Company / LLP / Partnership
- PAN of all directors or partners and PAN of the entity
- Certificate of Incorporation or Partnership Deed
- MOA & AOA, board authorisation letter
- Registered office address proof and bank account details
A sample GST compliance document — exporters who register compulsorily can also file a Letter of Undertaking (LUT) to export without paying IGST upfront.
How to Complete Compulsory GST Registration Online
Share Your Business Details
Fill the short application on this page or message our team on WhatsApp with your business type, state, and category of mandatory registration.
Upload PAN, Aadhaar & Address Proof
Send scanned copies of your identity, photograph, and business address documents through our secure upload link or WhatsApp.
CA Reviews & Files Form REG-01
Our Chartered Accountant verifies every document, prepares Form gst reG-01, and submits your application on the GST portal.
OTP Verification & ARN Generation
You verify mobile and email OTPs; an Application Reference Number (ARN) is generated and tracked by our team until approval.
Receive GSTIN, Certificate & Portal Login
Once approved, you get your 15-digit GSTIN, the GST Registration Certificate, and the User ID and Password of the GST portal.
Related GST & Business Compliance Services
Already have a GSTIN, or need something beyond registration? Explore related filings handled by our team:
- Compare all GST registration packages and pricing
- File your monthly GSTR-1 and GSTR-3B returns
- Get expert help filing GSTR-3B on time
- Check if the GST Composition Scheme suits your turnover
- Update details on an existing GSTIN
- Surrender or cancel an existing GST registration
- File a Letter of Undertaking (LUT) for export supplies
- Register your business under Udyam/MSME
- Incorporate a Private Limited Company
- Explore all new business registration options
- Know our CA team behind 50,000+ successful filings
- Talk to our compliance team directly
Frequently Asked Questions
Is GST registration compulsory for everyone?
No. GST registration is compulsory only for specific categories — inter-state suppliers, e-commerce sellers, casual and non-resident taxable persons, reverse charge payers, input service distributors, and agents — regardless of turnover. Other businesses must register only after crossing the ₹40 lakh (goods) or ₹20 lakh (services) turnover threshold.
What happens if I don't register when it's compulsory?
Operating without a mandatory GSTIN attracts a penalty of ₹10,000 or 100% of the tax due, whichever is higher, under Section 122 of the CGST Act, along with possible legal notices and disruption to your business operations.
Do e-commerce sellers need to register even below the turnover limit?
Yes. Any seller supplying goods or services through an e-commerce platform such as Amazon, Flipkart, or Meesho must Register for GST compulsorily, with no minimum turnover exemption.
Is compulsory GST registration required for inter-state supply?
Yes. Any person making a taxable supply of goods or services from one state to another must obtain GST registration compulsorily, even if their total turnover is well below the standard exemption limit.
What documents are needed for compulsory GST registration?
You need PAN and Aadhaar of the proprietor or partners/directors, a passport-size photograph, business address proof, and bank account details. Companies and LLPs additionally need incorporation documents, MOA/AOA, and a board authorisation letter.
How long does compulsory GST registration take?
With complete documents, GSTIN is typically issued within 24 hours to 7 working days. Our CA-assisted service targets 24-hour delivery once all documents and verification are complete.
What do I receive after GST registration is approved?
You receive your 15-digit GSTIN, the official GST Registration Certificate (Form REG-06), and the User ID and Password of the GST portal to file returns and manage your account.
Can a casual or non-resident taxable person register under GST?
Yes, casual taxable persons and non-resident taxable persons are compulsorily required to register before undertaking any supply in India, and this registration is generally valid for 90 days, extendable on request.
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