GST registration is the process of obtaining a 15-digit Goods and Services Tax Identification Number (GSTIN) so that you can legally collect GST, issue tax invoices and claim input tax credit. You must register if your aggregate annual turnover crosses the prescribed threshold, or earlier if your business falls in a category the law makes compulsory, such as inter-State supply of goods or selling through an e-commerce operator.
What is GST registration?
GST registration links your business to the indirect tax system. Once registered, you receive a GSTIN, a registration certificate in Form GST REG-06, and access to the GST portal for filing returns, generating e-invoices and e-way bills, and claiming refunds. The GSTIN is built from the State code, your PAN, an entity number, a default letter and a check digit, so a business with one PAN needs a separate GSTIN in every State where it has a place of business.
Registration is not just a tax formality. Buyers who are themselves registered can claim credit only on invoices that carry a valid GSTIN, which is why many B2B customers, marketplaces and government departments will not deal with an unregistered supplier. An unregistered person cannot charge GST on invoices and cannot claim input tax credit on purchases.
The law distinguishes between a person who is liable to be registered (section 22 and section 24 of the CGST Act) and one who chooses to register voluntarily (section 25(3)). Getting this classification right matters because it decides your return obligations from day one.
Who needs GST registration?
You should check registration if any one of the following describes your business. Turnover is calculated on an all-India basis for each PAN, and includes taxable, exempt and export supplies but excludes the GST itself.
- Suppliers of goods whose aggregate turnover exceeds ₹40 lakh in a normal-category State, or ₹20 lakh in a special-category State (the State may notify a different limit for goods within the permitted range)
- Suppliers of services whose aggregate turnover exceeds ₹20 lakh in a normal-category State, or ₹10 lakh in a special-category State
- Businesses making inter-State taxable supplies of goods, who generally cannot use the threshold exemption
- Sellers supplying through an e-commerce operator such as a marketplace, who must register irrespective of turnover under section 24
- Casual taxable persons and non-resident taxable persons, for example an exhibitor setting up a temporary stall in another State
- Persons liable to pay tax under reverse charge, input service distributors, and persons who must deduct or collect tax at source
- Suppliers of online information and database access or retrieval (OIDAR) services from outside India to non-registered persons in India
- Anyone who takes over a running business by transfer, succession or amalgamation of a registered business
Benefits of GST Registration
Legal authority to charge GST
Only a registered person may issue a tax invoice and collect GST from customers. Without a GSTIN you absorb the tax cost yourself or risk penalty for collecting tax you are not entitled to.
Input tax credit
Registered businesses can set off GST paid on purchases against GST payable on sales, subject to conditions of the Act. This usually lowers the effective tax burden for traders and manufacturers.
Access to B2B and marketplace sales
Large buyers, government tenders and online marketplaces ask for a GSTIN as a basic onboarding document. Registration therefore widens your customer base.
Inter-State and e-commerce selling
A GSTIN lets you supply goods across State borders and sell on marketplaces without being restricted by the turnover threshold.
Credibility with banks and lenders
Banks often review GST returns while assessing working-capital and business loan proposals, so a clean GST profile supports your credit file.
Eligibility and applicability
Any person carrying on business who meets the criteria below can apply. The following points decide whether registration is compulsory, optional or not available.
- Compulsory registration arises on the date turnover crosses the threshold, and you must apply within 30 days of becoming liable under section 25(1)
- Voluntary registration is allowed below the threshold under section 25(3), but you then take on the full set of returns and compliances
- Registration is State-wise and PAN-based: separate GSTINs are needed for each State, though multiple places of business in one State can fall under one GSTIN
- Persons dealing exclusively in goods or services that are wholly exempt, or agriculturists supplying produce from their own land, are generally not required to register
- A person registered under the Composition Scheme still holds a GSTIN but pays tax at a flat rate and cannot collect GST or claim input credit
- Under Rule 14A (in force from 1 November 2025), small taxpayers whose monthly output tax on supplies to registered persons does not exceed ₹2.5 lakh may opt for simplified registration, one per PAN per State or Union Territory
Documents required
Identity and constitution documents
- PAN of the proprietor, partnership firm, LLP, company or trust
- Aadhaar of the proprietor, partners or directors and the authorised signatory
- Passport-size photographs of the proprietor, partners or promoters
- Certificate of incorporation, partnership deed, LLP agreement or registration certificate, as applicable
- Board resolution or authorisation letter naming the authorised signatory
Principal place of business documents
- Electricity bill, property tax receipt or municipal khata copy for owned premises
- Rent or lease agreement together with the landlord's electricity bill and a no-objection consent for rented premises
- Consent letter from the owner for premises shared with family or others
- Address proof for each additional place of business or godown to be declared
Bank and technical details
- Bank account number, IFSC and a cancelled cheque, passbook first page or bank statement page showing name and address
- Mobile number and email address of the authorised signatory for OTP verification
- Digital Signature Certificate (DSC) for companies and LLPs, since they sign by DSC instead of EVC
- HSN codes for goods and SAC codes for services you will supply
Step-by-step GST registration process
The application is entirely online, in two parts. The sequence below reflects how the portal actually behaves in practice.
Confirm liability and registration type
Check your turnover, the States you will supply to and whether you sell through a marketplace. Decide whether you need regular registration, composition, or the Rule 14A simplified option.
Complete Part A of Form GST REG-01
Enter legal name as per PAN, PAN, email and mobile number. The portal sends separate OTPs to the email and mobile, then issues a Temporary Reference Number (TRN) valid for a limited period.
Fill Part B with business details
Log in with the TRN and enter trade name, constitution, promoter and signatory details, principal and additional places of business, goods and services with HSN or SAC codes, and bank details. Tick the Rule 14A option here only if you are eligible.
Upload documents
Upload the photographs, constitution proof, address proof and bank proof in the formats the portal accepts. Name mismatches between PAN, Aadhaar and documents are the single biggest cause of later queries.
Aadhaar authentication
Promoters or partners and the authorised signatory authenticate their Aadhaar through an OTP sent to the linked mobile. In some cases the system flags the application for biometric Aadhaar authentication and photograph capture at a GST Suvidha Kendra, depending on risk parameters and State.
Sign and submit
Verify the application with an Aadhaar-based e-signature, EVC or DSC. An Application Reference Number (ARN) is generated and you can track status using it.
Respond to any notice in Form GST REG-03
If the officer asks for clarification or documents, you reply in Form GST REG-04 within the time shown on the notice. A weak reply can lead to rejection in Form GST REG-05, so the reply needs to be precise and supported by evidence.
Receive GSTIN and certificate
On approval, the registration certificate in Form GST REG-06 is available on the portal. Download it, display it at the place of business and add your bank account details within the period allowed to avoid suspension of the registration.
Government fees
The GST portal does not charge any fee for filing the registration application, and there is no annual registration fee. Any payment you make to a consultant is professional charges and not a government levy.
| Item | Amount | Note |
|---|---|---|
| Registration application on the GST portal | Nil | No government fee is levied for Form GST REG-01 or for the certificate |
Professional charges are quoted separately after reviewing your case. Government fees are paid directly to the authority.
How long does GST registration take?
Rule 9 of the CGST Rules sets out the statutory sequence: the officer verifies the application and either approves it or issues a notice for clarification within a few working days of the application or Aadhaar authentication, and you get a fixed period to reply. Rule 14A, which came into force on 1 November 2025, is designed to deliver system-based registration within three working days for eligible small taxpayers, though high-risk applications can be diverted to manual verification. The actual time depends on risk scoring, physical verification and the quality of your documents, and cannot be promised by anyone.
| Stage | Typical time |
|---|---|
| Preparing documents and Part A / Part B | 1 to 2 working days |
| Aadhaar authentication and ARN generation | Same day, once all signatories authenticate |
| Officer processing under Rule 9 | Around 7 working days where no query arises |
| Rule 14A simplified route (eligible cases) | Targeted at 3 working days |
| Query and reply cycle (REG-03 / REG-04) | Adds to the above; depends on the notice |
Validity and amendments
A regular GST registration continues until you surrender it or the officer cancels it. Casual and non-resident taxable persons receive a registration for the period stated in the application, up to ninety days, extendable. Changes in the legal name, address, partners, directors or bank details must be reported through an amendment application. Core fields such as the legal name or principal place of business need officer approval, while non-core fields change on the portal itself. If your business closes, you must apply for cancellation and file the final return, otherwise return obligations and late fees keep accruing.
Compliance after registration
- Add your bank account details on the portal within the period allowed after registration, or before filing the first GSTR-1, whichever is earlier, so the GSTIN is not suspended
- Issue proper tax invoices, and e-invoices where your turnover crosses the notified limit, and generate e-way bills for goods movement as applicable
- File GSTR-1 and GSTR-3B on time, even when there are no sales; see our guide to GST return filing
- Display the GSTIN certificate at the principal place of business and the GSTIN on the name board
- Reconcile purchases with GSTR-2B before claiming input tax credit
- Apply for amendment when any registration detail changes, and for cancellation when the business ceases
- Look after your other registrations in step, for example MSME Udyam registration, FSSAI licence or Import Export Code, so addresses and names match
Regular vs Composition vs Rule 14A registration
| Point | Regular registration | Composition scheme | Rule 14A simplified route |
|---|---|---|---|
| Who it suits | Most businesses crossing the threshold, or needing input credit | Small suppliers of goods who opt for a flat rate | Small taxpayers with monthly output tax on supplies to registered persons up to ₹2.5 lakh |
| Collect GST from customers | Yes | No | Yes |
| Input tax credit | Available | Not available | Available |
| Processing target | Rule 9 timelines | Rule 9 timelines | System-based, 3 working days |
| Limit per PAN per State | One GSTIN per State, with additional places of business | Choose for the whole PAN in the State | One Rule 14A registration per PAN per State or UT |
Common mistakes and rejection reasons
Name or address mismatch
The legal name must match PAN exactly, and the premises address must match the proof uploaded. A different spelling on the electricity bill or an old address in the rent deed is a routine reason for a REG-03 notice.
Incomplete rent documents
A rent agreement without the owner's ownership proof, or a consent letter without the owner's identity document, invites a query. Where the premises are in a family member's name, attach a clear consent letter.
Wrong constitution or signatory
Choosing proprietorship when the business is actually run by a firm, or naming an authorised signatory who has no authority letter, creates mismatches that officers reject.
Skipping Aadhaar authentication
Registration cannot move forward until the required persons authenticate. If authentication is skipped or the Aadhaar-linked mobile is not accessible, the application is held up and the timeline lengthens.
Missing HSN or SAC mapping
Declaring generic goods or services descriptions, or mapping the wrong HSN code, can cause problems later in invoicing and returns. Pick codes with the actual supply in mind.
Registering too late
Waiting until a buyer or marketplace demands a GSTIN means you may already have crossed the threshold and supplied without charging tax, creating a liability you must pay from your own pocket.
Penalties for not registering
If you are liable to register but do not, the department can assess tax for the period of non-registration with interest, and impose a penalty under section 122 of the CGST Act. Where the default is not fraudulent, the penalty can be ten per cent of the tax due, subject to a minimum of ₹10,000; where it involves fraud or deliberate evasion, the penalty can extend to the full amount of tax. A person who is not registered also cannot claim input tax credit for the unregistered period.
| Default | Consequence | Provision |
|---|---|---|
| Failure to obtain registration when liable (non-fraud) | 10% of tax due, minimum ₹10,000 | Section 122 CGST Act |
| Failure to obtain registration with intent to evade tax | Up to 100% of the tax evaded | Section 122 CGST Act |
Practitioner tips
- Before filing, put the PAN card, Aadhaar, electricity bill and rent deed side by side and check that the name and address read identically. Fixing it before submission saves the query cycle.
- If you operate from a rented space, ask the landlord for a recent electricity bill and a signed consent letter on day one. These two documents are the usual bottleneck.
- Do not pick an authorised signatory who will be unavailable for OTPs. The Aadhaar-linked mobile number must be in the hands of someone who can respond within hours.
- Check whether your State uses biometric Aadhaar authentication at a GST Suvidha Kendra for flagged applications, and keep original identity documents ready if you are called.
- Sellers on marketplaces should register in each State where they store stock in the marketplace warehouse, because stock transfers create a place of business there.
How Lawgical Guru helps
Liability and type assessment
We review your turnover, supply pattern and States of operation to tell you whether registration is compulsory, optional, or better done under composition or Rule 14A.
Document review
We check names, addresses and proofs against each other before the application is filed, which is where most queries originate.
Application filing
We prepare Parts A and B of REG-01, map your HSN and SAC codes and coordinate the Aadhaar authentication and signing steps with your signatories.
Query handling
If a REG-03 notice arrives, we draft the REG-04 reply and the supporting annexures within the response window.
After-registration set-up
We help you add the bank account, set up invoicing and calendar your first GSTR-1 and GSTR-3B.
GST Registration: frequently asked questions
What is the GST registration limit?
For goods, registration is needed if aggregate turnover exceeds ₹40 lakh in normal-category States or ₹20 lakh in special-category States. For services the limits are ₹20 lakh and ₹10 lakh. Inter-State sellers, e-commerce sellers and other mandatory categories must register irrespective of turnover.
Is GST registration free?
Yes. The GST portal charges no government fee to apply for or obtain a GSTIN. If you use a consultant, you pay professional charges separately. Be cautious of any offer that describes a portal fee for registration, because none exists.
How long does GST registration take?
Under Rule 9, registration is generally processed within about seven working days where documents are in order, and Rule 14A targets three working days for eligible small taxpayers. Queries, physical verification or biometric authentication extend this. No consultant can promise an exact date.
What is Rule 14A simplified GST registration?
Rule 14A is an optional route, in force from 1 November 2025, for small taxpayers whose monthly output tax on supplies to registered persons does not exceed ₹2.5 lakh. It aims at system-based registration in three working days, with Aadhaar authentication. Only one such registration is allowed per PAN in a State or Union Territory.
Is Aadhaar authentication compulsory for GST registration?
Aadhaar authentication of the promoters or partners and authorised signatory is a standard step under section 25 of the CGST Act, subject to limited exceptions. If you skip it, the application is not processed in the ordinary way and may go to physical verification. Biometric authentication may be required in flagged cases.
Can I get GST registration without a shop or office?
You need a principal place of business, but it can be your residence if you have the owner's consent and a valid utility bill. Some e-commerce and service businesses operate from home addresses. The address must be real and verifiable, because physical verification can follow.
Do e-commerce sellers need GST registration even with low turnover?
Yes. Under section 24 of the CGST Act, persons supplying goods through an e-commerce operator that collects tax at source must register irrespective of turnover. Check your marketplace's conditions as well, since some require registration in the State where inventory is stored.
Can I register voluntarily below the threshold?
Yes, section 25(3) allows voluntary registration. You gain the ability to charge GST and claim input tax credit, but you must file all returns and follow invoicing rules. Think about this before applying, because surrendering the registration later is also a formal process.
What happens if I do not register when required?
The department can raise a demand for tax with interest for the period of default and levy a penalty under section 122. You also lose input tax credit for that period. It is much cheaper to register on time than to regularise a default later.
Can a person have more than one GST registration?
A PAN holder can have one registration per State for regular business, and separate registrations for distinct business verticals in the same State if the rules allow. For a business operating in several States, a separate GSTIN is needed for each State where it supplies from a place of business.
Related guides
Reviewed by Satyam Gupta, Company Secretary (CS) & Advocate
8+ years of industry experience. This page was last reviewed on 16 October 2026 against the official sources below. Rules and fees change — confirm on the official portal before you apply.