If you are about to start selling goods, offering services, or listing products on a marketplace in India, understanding the GST registration process is usually one of the first compliance steps you need to get right. A registration done with the wrong documents or an incomplete application can mean weeks of delay, rejected applications, and missed opportunities to invoice B2B customers who expect a valid GSTIN.
This guide walks through who needs to register, the documents you should keep ready, the step-by-step online process, and what changes for your business once the GSTIN is issued.
Who needs to register for GST
Businesses are generally required to register for GST once their aggregate turnover crosses a specified threshold, and the threshold itself differs depending on whether you supply goods or services, and which state you operate from. Because these limits are revised from time to time, always confirm the current threshold applicable to your business category on the official GST portal (www.gst.gov.in) before deciding whether registration is mandatory.
Separately from the turnover-based rule, certain categories of businesses are typically required to register regardless of turnover, including:
- Businesses making inter-state taxable supplies
- Sellers supplying goods or services through e-commerce operators
- Casual taxable persons and non-resident taxable persons
- Persons required to pay tax under reverse charge
- Input service distributors and certain agents
Many businesses also choose voluntary registration even before crossing the threshold, usually because B2B buyers want a valid GSTIN on the invoice to claim input tax credit, or because a marketplace will not onboard an unregistered seller.
Documents you will need
The exact document list depends on your business constitution. The table below summarises what is commonly requested.
| Business type | Typical documents |
|---|---|
| Proprietorship | PAN and Aadhaar of proprietor, photograph, business address proof, bank account proof |
| Partnership / LLP | Partnership deed or LLP agreement, PAN of firm, PAN and Aadhaar of partners, authorised signatory letter, address and bank proof |
| Private Limited / OPC | Certificate of incorporation, PAN of company, MOA/AOA, board resolution authorising signatory, director KYC, address and bank proof, digital signature for the authorised signatory |
Address proof for your principal place of business
Depending on whether the premises are owned, rented, or shared, you may need an electricity bill or property tax receipt, a rent or lease agreement along with the owner's consent, or a No Objection Certificate. Keep a recent document - old utility bills are a common reason officers raise a query.
Bank account proof
A cancelled cheque, the first page of a bank passbook, or a bank statement showing the account holder's name, account number, and IFSC is usually acceptable. This can typically be added once the account is opened, even shortly after the GSTIN is granted.
Step-by-step GST registration process
- Part A - generate a TRN: On the GST portal, provide PAN, mobile number, and email to receive OTPs and generate a Temporary Reference Number.
- Part B - fill business details: Using the TRN, complete details of the business, promoters/partners/directors, principal and any additional places of business, goods and services (HSN/SAC), bank account, and the authorised signatory.
- Aadhaar authentication: Most applicants are prompted to complete Aadhaar e-KYC for the authorised signatory, which can speed up approval.
- Submit with DSC or EVC: Companies and LLPs typically must submit using a digital signature certificate; other entities can use an electronic verification code (OTP-based).
- ARN generation: Once submitted, an Application Reference Number is generated so you can track status.
- Officer verification: A tax officer reviews the application and supporting documents, and may schedule physical verification of the premises in some cases.
- GSTIN issued or query raised: If everything is in order, the GSTIN and registration certificate are issued. If the officer needs clarification, a query is raised and you get a window to respond with additional information.
Responding to a registration query
If a query is raised, read it carefully - it usually points to a specific document or field, such as an address proof that does not match the application or a photograph that is not clear. Respond within the window given, because an unanswered query can lead to rejection and force you to reapply from scratch.
Common reasons applications get delayed or rejected
- Address proof that does not match the address entered in the application
- Blurry or partially cropped scanned documents
- Name mismatch between PAN and the application
- Principal place of business category (own/rented/shared/consent) not matching the proof uploaded
- HSN/SAC selection that does not reflect the actual business activity
What changes once you are registered
Once your GSTIN is active, you are expected to issue GST-compliant tax invoices for every taxable supply - see our guide on how to create a GST-compliant invoice for the mandatory fields. You will also need to file periodic returns on a schedule; our GST return filing calendar lays out what is typically due and when. As transaction volume grows, tools like GSTR-1 automation can help convert your sales records into a return-ready format instead of building it manually every period.
If you plan to sell on marketplaces
If you intend to list on Amazon, Flipkart, Meesho, or similar platforms, remember that e-commerce sellers are generally required to be GST-registered irrespective of turnover, and the marketplace will typically ask for your GSTIN during seller onboarding. Once registered, platforms like OneBooks GST can help pull in your marketplace sales reports and prepare your GSTR-1 filing, and our accounting software can help you keep invoice records organised from day one.
Displaying your GSTIN and registration certificate
Once issued, your registration certificate and GSTIN are not just paperwork to file away. You are generally expected to display your GSTIN and registration certificate at your principal place of business, and to quote the GSTIN on every tax invoice, e-way bill, and other prescribed document you issue. Many first-time registrants also forget that additional places of business need to be added to the same registration through an amendment rather than left undeclared - if you open a second warehouse or office in the same state, update your registration details rather than operating from an address that isn't on record.
Keeping registration details current
Details like your authorised signatory, bank account, or additional place of business can change as your business grows. Most of these changes can be updated through an amendment application on the portal, and some take effect immediately while others require officer approval. Treat registration details as living information that needs periodic review, not a one-time setup step.
Frequently asked questions
Is GST registration free?
The government does not charge a fee for GST registration through the portal. You may still incur costs if you engage a professional to prepare and file the application on your behalf.
How long does GST registration take?
Timelines vary based on document quality and whether a query or physical verification is required. Keep documents accurate and complete to avoid avoidable delays, and check current processing timelines on the GST portal.
Can I register voluntarily even if I am below the threshold?
Yes, voluntary registration is available for businesses below the applicable threshold, and many choose it to claim input tax credit or to satisfy B2B buyers and marketplaces that require a GSTIN.
What is an ARN and how do I use it?
The Application Reference Number is generated after you submit your registration application and lets you track its status on the GST portal until a GSTIN is issued or a query is raised.
Do I need a separate GSTIN for each state I operate in?
Generally yes - GST registration is state-wise, so a business with a place of business in more than one state usually needs a separate GSTIN for each state.
What happens if I operate without registering when it is required?
Operating without a required registration can expose you to penalties and interest, and can complicate matters like claiming input tax credit or invoicing B2B customers correctly. If you are unsure whether registration applies to you, verify your specific situation on the GST portal or with a tax professional.
Using OneBooks GST for this workflow
Once the source files are in hand, OneBooks GST imports sales data, prepares GSTR-1, parses bank statements, and exports to Tally XML, Miracle, Profit NX, Excel and CSV.
Reviewing the output in OneBooks GST before it leaves the system is the step that catches period, GSTIN and tax-rate errors while they are still easy to fix.
