GST registration is mandatory for businesses exceeding the prescribed turnover thresholds and for specific categories of taxpayers, regardless of turnover. Registration is completed online through the GST portal at no cost. Upon approval, the taxpayer receives a unique 15-digit GSTIN that enables them to collect GST, issue tax invoices, and claim Input Tax Credit. Non-registration when required attracts penalties of 100% of the tax due or Rs. 10,000, whichever is higher.
Who Is Eligible for GST Registration?
Eligibility for GST registration is determined by two factors: the business’s aggregate turnover and the nature of its business activity. Some businesses must register regardless of turnover.
Turnover-Based Registration
| Business Type | General States Threshold | Special Category States Threshold |
| Suppliers of goods | Rs. 40 lakh | Rs.20 lakh |
| Suppliers of services | Rs. 20 lakh | Rs.10 lakh |
| Both goods and services | Rs. 20 lakh (service threshold applies) | Rs.10 lakh |
Aggregate turnover includes the total value of all taxable supplies, exempt supplies, exports, and inter-state supplies of a person having the same PAN. It is computed on a pan-India basis across all business verticals and registrations.
Mandatory Registration Categories (Regardless of Turnover)
Certain businesses must register for GST irrespective of their turnover. These include persons making inter-state taxable supplies (with specific exceptions for handicraft suppliers), casual taxable persons conducting temporary business in a state, non-resident taxable persons conducting business in India, persons required to pay tax under reverse charge mechanism, e-commerce operators and persons supplying through e-commerce platforms, Input Service Distributors, agents of suppliers, persons deducting TDS under Section 51, and persons supplying goods or services on behalf of other taxable persons.
Voluntary Registration
Businesses below the turnover threshold can voluntarily register for GST. Voluntary registration offers several advantages:
• Ability to issue tax invoices and collect GST from customers
• Eligibility to claim ITC on business purchases, reducing effective costs
• Permission to make inter-state supplies without threshold restrictions
• Enhanced business credibility with registered suppliers and buyers
• Access to e-commerce platforms that require GST registration for sellers
However, once voluntarily registered, the taxpayer must comply with all GST obligations, including return filing, ITC reconciliation, and annual return submission. Voluntary registration cannot be cancelled for one year from the date of registration.
Registration Fees
| Component | Fee |
| Government registration fee on the GST portal | Free (Rs.0) |
| Professional fees (if engaging CA/tax consultant) | Rs. 1,000 to Rs. 5,000 (market rate; varies by complexity) |
| Digital Signature Certificate (for companies/LLPs) | Rs. 500 to Rs. 2,000 (from authorised certifying authorities) |
| Aadhaar authentication | Free |
| Biometric verification (where applicable) | Free (at GST Suvidha Kendras) |
The government does not charge any fee for GST registration. All costs associated with GST registration relate to professional assistance, DSC procurement, or document preparation, none of which are government charges.
Understanding the GSTIN
The GSTIN (Goods and Services Tax Identification Number) is a unique 15-digit alphanumeric code assigned to every registered taxpayer.
| Position | Characters | Meaning | Example |
| 1-2 | State code | Two-digit state code as per the Census | 27 (Maharashtra) |
| 3-12 | PAN | 10-character PAN of the entity | AABCT1234F |
| 13 | Entity number | Sequence number for multiple registrations in the same state | 1 (first registration) |
| 14 | Default character | Always “Z” | Z |
| 15 | Check digit | Auto-generated checksum | 5 |
Example GSTIN: 27AABCT1234F1Z5 (Maharashtra, PAN AABCT1234F, first registration).
A single PAN can have multiple GSTINs across different states. Within the same state, multiple registrations are possible for different business verticals.
Required Documents
| Document Category | Specific Documents | Entity Type |
| Identity proof | PAN card of the business/applicant | All |
| Address proof of business. | Electricity bill (< 2 months old), rent agreement, property tax receipt, or NOC from owner | All |
| Photographs | Passport-size photographs of promoters/partners/directors | All |
| Bank details | Cancelled cheque, bank statement first page, or passbook | All |
| Constitution document | Partnership deed | Partnership firms |
| Constitution document | Certificate of incorporation, MOA, AOA | Companies |
| Constitution document | LLP agreement, certificate of incorporation | LLPs |
| Constitution document | Trust deed | Trusts |
| Authorisation | Board resolution or authorisation letter | Companies, LLPs |
| Digital signature | Valid DSC of authorised signatory | Companies, LLPs (mandatory) |
Penalties for Non-Registration
| Violation | Penalty Under the CGST Act | Legal Provision |
| Conducting business without mandatory GST registration | 100% of tax due or Rs. 10,000 (whichever is higher) | Section 122(1)(xi) |
| Collecting GST without being registered | 100% of tax collected or Rs. 10,000 (whichever is higher) | Section 122(1)(i) |
| Issuing a tax invoice without registration | Rs. 25,000 per invoice | Section 122(1)(ii) |
| Not applying for registration within 30 days of becoming liable | Interest on tax liability from the date the liability arose | Section 25(3) |
| Furnishing false information in a registration application | Cancellation of registration + penalty | Section 29 |
Operating without registration when required is a serious offence. The business cannot legally collect GST, issue valid tax invoices, or allow its buyers to claim ITC on purchases made from it.
Registration Certificate (Form REG-06)
Upon approval, the tax officer issues the registration certificate in Form REG-06 containing the GSTIN, legal name and trade name, principal place of business and additional places, effective date of registration, type of registration (regular, composition, ISD, etc.), and the validity period (permanent for regular; specified period for casual/non-resident).
The certificate is available for download from the GST portal under Services> Registration> Registration Certificate. It should be displayed prominently at the principal place of business.
Key Terms
• GSTIN: The unique 15-digit Goods and Services Tax Identification Number assigned to every registered taxpayer, based on the state code and PAN
• Aggregate Turnover: The total value of all supplies (taxable, exempt, exports, interstate) computed on a pan-India basis for all registrations under the same PAN
• Voluntary Registration: Registration obtained by businesses below the turnover threshold to access ITC, inter-state supply, and e-commerce selling privileges
• Form REG-06: The GST registration certificate issued by the tax officer upon approval, containing the GSTIN and registration details
• Section 122: The CGST Act provision prescribing penalties for various GST offences, including operating without registration and collecting tax without authorisation
Need to Register for GST?
Ensure your registration application is complete with all required documents. Use WFYI resources to check eligibility, prepare documents, and complete registration without delays.
| Disclaimer: This article is for informational purposes only and does not constitute legal or tax advice. Consult a qualified tax professional for advice specific to your situation. |
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Frequently Asked Questions
Q1: Is there any fee for GST registration?
No. GST registration through the official government portal gst.gov.in is completely free. There are no government charges. Professional fees for CA or consultant assistance, if engaged, are separate and vary by market.
Q2: How long does GST registration take?
With Aadhaar authentication, registration is typically processed within 3 working days. With biometric verification (required in some states), it takes about 7 working days. Without Aadhaar authentication, physical verification can extend the process to 21-30 days.
Q3: Can I register voluntarily if my turnover is below Rs. 40 lakh?
Yes. Voluntary registration allows businesses to issue tax invoices, claim ITC, make inter-state supplies, and sell on e-commerce platforms. However, once registered, all compliance obligations, including return filing, become mandatory. Registration cannot be cancelled for one year.
Q4: What is the penalty for not registering for GST?
Operating without mandatory registration attracts a penalty of 100% of the tax due or Rs. 10,000, whichever is higher, under Section 122 of the CGST Act. Additionally, the business cannot legally collect GST or issue valid tax invoices.
Q5: Can I have multiple GST registrations?
Yes. Separate registrations are required for each state where you have a place of business. Within the same state, additional registrations can be obtained for different business verticals under specific conditions prescribed in the CGST Rules.
