GST Registration Online in India: Process, Fees & Documents

GST registration is one of those steps founders either rush into far too early or put off until a customer refuses to raise a purchase order without a GSTIN. Neither is a good place to be making the decision from. The registration itself is an online process and genuinely not difficult — but the parts that go wrong (rejected applications, the wrong business constitution, a principal place of business you cannot document) go wrong before you ever open the portal.

First: do you actually need to register?

GST registration becomes mandatory once your aggregate turnover crosses the prescribed threshold, and that threshold differs depending on whether you supply goods or services, and on which state you operate from — special category states have lower thresholds than the rest of the country. Because these limits have been revised more than once since GST came in, the sensible approach is to confirm the current threshold applicable to your specific supply type and state rather than relying on a figure you read somewhere two years ago.

Turnover, though, is only one trigger. Several situations require registration regardless of how small your revenue is:

• Inter-state supply of goods — supplying goods from one state to another generally brings a registration requirement irrespective of turnover.
• E-commerce operators and sellers on marketplaces — most marketplace platforms will not onboard you without a GSTIN, and specific provisions apply to operators themselves.
• Liability under reverse charge — where the recipient rather than the supplier is liable to pay tax.
• Casual taxable persons and non-resident taxable persons — anyone supplying occasionally in a state where they have no fixed place of business.
• Agents supplying on behalf of another taxable person, and input service distributors.

There is also voluntary registration, which is worth a serious look for startups. If your customers are businesses, they will want to claim input tax credit on what they pay you — and they cannot do that unless you are registered and charging GST. Plenty of early-stage B2B companies register voluntarily well before the threshold simply because it removes a friction point from every enterprise sales conversation.

The threshold tells you when you must register. Your customers usually tell you when you should.

The cost of registering too early

Voluntary registration is not free in practical terms. The moment you hold a GSTIN, the return-filing obligation begins — and it does not pause because you had no sales that month. Nil returns still have to be filed, on time, every period, and late filing attracts late fees that accumulate. Founders who register "just in case" and then forget about it for two quarters usually discover the mistake as a bill, not a notice.

So the honest framing is: registration is cheap, but the compliance that follows it is a standing commitment. If you are going to register voluntarily, have the filing process sorted at the same time — our GST returns and reconciliation service exists precisely because the returns, not the registration, are where the ongoing work lives.

Documents you will need

The exact document set depends on your business constitution — a proprietorship, a partnership, an LLP and a private limited company each produce a slightly different list. Broadly, you should have these ready before you begin:

• PAN of the business — the company or LLP PAN for registered entities, the proprietor's PAN for a proprietorship.
• PAN and Aadhaar of the promoters, partners or directors, along with photographs.
• Proof of constitution — certificate of incorporation for a company or LLP, the partnership deed for a firm.
• Proof of principal place of business — ownership documents, or a rent or lease agreement together with a recent utility bill and, where required, a no-objection certificate from the owner.
• Bank account details — a cancelled cheque, bank statement or passbook page showing the account name, number and IFSC.
• Authorisation letter or board resolution appointing the authorised signatory, plus that person's details.
• Digital signature certificate (DSC) — mandatory for companies and LLPs; proprietorships and partnerships can typically use Aadhaar-based e-verification instead.

If you incorporated recently, most of this already sits in the folder your incorporation produced. If you have not incorporated yet and are still deciding on structure, that decision comes first — our guides to private limited company registration and LLP registration cover how the choice affects everything downstream, GST included.

The registration process, step by step

Registration happens entirely on the GST portal and follows a two-part application.

• Part A — you submit basic details: legal name as per PAN, state, district, email and mobile number. These are verified by OTP, and you receive a Temporary Reference Number (TRN).
• Part B — using the TRN, you complete the substantive application: business details, promoter and partner information, the authorised signatory, principal and additional places of business, the goods and services you supply with their HSN or SAC codes, bank account details, and state-specific information.
• Verification — the application is submitted with a DSC or through Aadhaar-based e-verification, depending on your constitution. Aadhaar authentication of the promoters and authorised signatory is a standard part of the flow and, when completed successfully, generally speeds up processing.
• Processing — the officer either approves the application or raises a query seeking clarification, which is issued as a notice you must respond to within the stipulated window. Unanswered queries lead to rejection, and rejection means starting over.
• GSTIN issued — on approval you receive a 15-digit GSTIN and the registration certificate, downloadable from the portal.

What it costs

There is no government fee for GST registration itself — the application on the portal carries no statutory charge. What you may pay for are the surrounding items: a digital signature certificate if you do not already hold one, professional fees if you have the application prepared and filed for you, and the ongoing cost of return filing thereafter. Anyone quoting you a "government fee" for the registration itself is describing something that does not exist. You can see how we price registration and ongoing compliance work on our pricing page.

Regular scheme or composition scheme?

Small taxpayers below a prescribed turnover limit may opt for the composition scheme, which trades a simpler compliance burden for a significant restriction. The trade-off matters more than founders expect.

For most startups the regular scheme is the right answer almost by default, because the inability to pass on input tax credit makes you structurally more expensive to your business customers than a registered competitor. The composition scheme earns its place in small, local, largely B2C operations where the compliance saving is real and the credit chain does not matter.

Where applications actually go wrong

Rejections are rarely about anything complicated. In practice, the recurring causes are:

• Address proof that does not match the application — a rent agreement in a personal name, an electricity bill in a landlord's name with no NOC, or a co-working space without proper documentation for the address.
• Name mismatches between PAN, the incorporation certificate and the application. The legal name must match PAN exactly.
• Wrong business constitution selected, which then conflicts with the documents uploaded.
• Failed or skipped Aadhaar authentication, which can route the application towards physical verification and a longer timeline.
• Clarification notices left unanswered because nobody was monitoring the registered email — a startlingly common cause of avoidable rejection.

What happens the day after you get your GSTIN

The registration is the beginning of the obligation, not the end of it. From the effective date of registration you must issue GST-compliant tax invoices carrying your GSTIN and the correct HSN or SAC codes, file the applicable returns each period whether or not you had turnover, reconcile input tax credit against what your vendors report, and display your registration certificate at your principal place of business.

The credit reconciliation is the part that quietly compounds. Credit you are entitled to is only usable if your vendor actually reported the invoice — which makes monthly reconciliation against your purchase register the difference between claiming what you are owed and writing it off. That discipline is also what makes the annual return manageable; our post on the GST annual return covers what happens when twelve months of small gaps surface at once.

Keeping the books current underneath all of this is what makes GST compliance a routine rather than a recurring scramble — which is the case for monthly bookkeeping rather than an annual catch-up. And GST rarely arrives alone: TDS, ROC filings and payroll obligations tend to land in the same weeks, which is why we map them together under our compliance service.

The short version

Register when the law requires it, or earlier if your customers need to claim credit on what you charge them. Get the address documentation right before you start, because that is where most applications stumble. Choose the regular scheme unless you are genuinely a small local B2C business. And treat the GSTIN as the start of a monthly commitment rather than a one-time box to tick — because from the day it is issued, the returns clock is running whether you are selling anything or not.