GST Registration Online – 2026 Guide to GSTIN

Is GST registration right for you?

Not everyone needs it. And some people who don't need it still want it. Here is how to think about it.

You must register if any of these fit:

• Your turnover crossed the threshold this financial year — ₹40 lakh if you sell only goods (in states that adopted the higher limit), ₹20 lakh if you sell services or a mix, ₹20 lakh/₹10 lakh in special-category states like Mizoram, Tripura, Manipur and Nagaland.
• You sell goods or services to customers in another state. Inter-state supply triggers mandatory registration at any turnover — even ₹1.
• You sell through Amazon, Flipkart or any e-commerce operator. Sellers on e-commerce platforms need registration regardless of turnover.
• You are a casual taxable person — you set up a temporary stall, exhibition or seasonal business in a state where you don't have a fixed place.
• You pay tax under reverse charge, deduct TDS under Section 51, or collect TCS under Section 52.
• You are an input service distributor, an agent supplying on behalf of someone else, or a non-resident taxable person.

Consider voluntary registration below the threshold if:

• Your buyers are GST-registered businesses. They prefer — often insist on — buying from registered suppliers, because only then can they claim input tax credit on your invoice. Lose the GSTIN, lose the client. That is the real arithmetic for most B2B sellers.
• You plan to sell online. No GSTIN, no Amazon/Flipkart seller account. No exceptions worth discussing.
• You want to bid for government or large corporate tenders. Most require a GSTIN upfront.

You can reasonably wait if:

• You sell only to end consumers, entirely within your state, below the threshold, with no plans to expand. A neighbourhood bakery or a freelance designer with local clients gains little from registering early — and takes on monthly return filing in exchange.
• Your turnover is borderline and seasonal. Watch the number. The moment aggregate turnover crosses the threshold in a financial year, the 30-day clock starts.

The trade is straightforward: registration buys input tax credit, interstate reach and buyer credibility. It costs monthly compliance — GSTR-1 and GSTR-3B each month (quarterly under QRMP below ₹5 crore turnover), invoice discipline, and reconciling your suppliers' filings. For a growing business the benefits dwarf the costs. For a tiny local operation, the compliance can genuinely outweigh the gain.

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Who must register — the legal position

Section 22 sets turnover-based liability; Section 24 lists categories that must register at any turnover.

Turnover thresholds (Section 22)

The operative phrase is aggregate turnover — all taxable supplies, exempt supplies, exports and inter-state supplies under the same PAN, across India, in a financial year. Not profit. Not one shop's sales. Everything under your PAN, added together.

| Your situation | Normal states | Special-category states | |---|---|---| | You supply only goods | ₹40 lakh* | ₹20 lakh | | You supply services, or goods + services | ₹20 lakh | ₹10 lakh |

\*The ₹40 lakh figure is a notified enhancement (Notification No. 10/2019-Central Tax) for persons exclusively supplying goods — not universal. Excluded: ice-cream, pan masala and tobacco manufacturers, inter-state suppliers, e-commerce sellers and others. Unsure if you qualify as "exclusively goods"? Assume ₹20 lakh until a professional confirms.

Special-category states (Mizoram, Tripura, Manipur, Nagaland and others) apply ₹20 lakh/₹10 lakh. Threshold positions can vary by state notification — confirm yours before relying on the table.

Mandatory registration regardless of turnover (Section 24)

These categories register at any turnover:

1. Inter-state suppliers — anyone making taxable supplies from one state to another. 2. Casual taxable persons — temporary or seasonal businesses without a fixed place (exhibitions, stalls, pop-ups). 3. Non-resident taxable persons — foreign businesses making taxable supplies in India without a fixed establishment here. 4. Persons paying tax under reverse charge — where the buyer, not the seller, pays the GST. 5. E-commerce operators required to collect TCS under Section 52, and persons supplying through such operators. 6. TDS deductors under Section 51 (mostly government bodies and notified persons). 7. Input service distributors — head offices distributing input tax credit to branches. 8. Agents supplying goods or services on behalf of other taxable persons. 9. Suppliers of online information and database access (OIDAR) services from outside India to Indian customers.

If you fall in any of these buckets, the threshold table above is irrelevant to you. Register.

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Regular scheme vs composition scheme — decide before you apply

This is the single most consequential choice in the application, and the portal asks you upfront. Get it wrong and you will be amending the registration later.

Regular scheme (the default). You charge GST on every invoice, file GSTR-1 and GSTR-3B monthly (or quarterly under QRMP), and claim input tax credit on your purchases. This is what most businesses need — especially B2B sellers, inter-state traders, exporters and e-commerce sellers.

Composition scheme (Section 10). A simplified option for small taxpayers. You pay a flat, low rate of tax on turnover, file one quarterly statement (CMP-08) and one annual return (GSTR-4), and skip invoice-level reporting. The price: you cannot claim input tax credit, you cannot make inter-state supplies, you cannot sell through e-commerce operators, and you cannot issue tax invoices (only bills of supply).

Who qualifies, and at what rate:

| Category | Turnover limit | Tax rate | |---|---|---| | Manufacturers and traders (goods) | ₹1.5 crore (₹75 lakh in special-category states) | 1% (0.5% CGST + 0.5% SGST) | | Restaurant services (not serving alcohol) | ₹1.5 crore | 5% | | Service providers | ₹50 lakh | 6% (3% CGST + 3% SGST) |

Excluded from composition entirely: manufacturers of ice cream, pan masala and tobacco products; casual taxable persons and non-resident taxable persons; anyone already excluded from the ₹40 lakh threshold notification.

Composition suits a small local retailer or restaurant serving walk-in customers. It is poison for B2B — your buyers get no input credit on your bills of supply, so they will buy from your competitor instead. Choose with your customer base in mind, not the paperwork.

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Advantages of GST registration

Input tax credit. The big one. GST paid on purchases — raw material, rent, services, equipment — becomes credit offsetting the GST you collect on sales. Unregistered, that tax is a dead cost in your margins. For a manufacturer or trader with real input costs, this alone justifies registering.

Inter-state sales. Selling across state lines without registration isn't just difficult — it's illegal. Registration opens the whole country.

E-commerce access. Amazon, Flipkart and every other operator require a GSTIN before you list a single product.

Buyer credibility. Registered businesses prefer registered suppliers — your tax invoice lets them claim credit. Many companies won't onboard an unregistered vendor at all. A GSTIN often decides B2B contracts.

One PAN, many states. A single PAN gets a GSTIN in each state you operate in — five states means five registrations under one PAN, not five tax identities.

Tenders and government work. Most government tenders and large vendor empanelments list GSTIN as mandatory.

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The honest trade-offs

Monthly compliance is real. GSTR-1 by the 11th, GSTR-3B by the 20th, every month — late fees accrue daily. Under ₹5 crore turnover, QRMP cuts this to quarterly filing with monthly payments.

Your suppliers affect you. Input credit depends on suppliers filing correctly — GSTR-2B builds your available credit from their filings. If they don't file, your credit shrinks. Chasing vendors becomes routine.

Invoice discipline is non-negotiable. Every invoice needs the correct GSTIN, HSN/SAC codes, place of supply and tax breakup. Sloppy invoicing creates mismatches that surface months later in assessments.

E-invoicing at ₹5 crore. Past that turnover in any year since 2017-18, B2B invoices need an IRN from the Invoice Registration Portal. Another system to integrate.

None of this argues against registering when the law requires it. It argues for setting up proper accounting from day one instead of scrambling later.

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Documents required

Have these ready before starting Part A. Most stalled applications trace to a document mismatch discovered at Part B.

For all applicants:

• PAN card of the business (or proprietor, for sole proprietorships). The GSTIN is derived from the PAN — the two are permanently linked.
• Aadhaar card of the proprietor, partners or authorised signatory. Needed for Aadhaar authentication — keep the mobile number linked to Aadhaar active, because the OTP goes there.
• Photograph of the proprietor/partners/directors — recent, passport-size.
• Proof of principal place of business — where most applications trip:

- *Owned:* property tax receipt, sale deed or ownership document. - *Rented:* rent/lease agreement plus owner NOC consenting to business use of the address. - *Shared/family property:* owner consent letter plus their ownership proof. - A recent utility bill for the address strengthens the application.

• Bank account proof — first page of bank statement or a cancelled cheque showing account holder name, account number and IFSC.

Additional for companies and LLPs:

• Digital Signature Certificate (DSC) — Class 2 or 3, of the authorised signatory. Companies and LLPs must sign the application with DSC; Aadhaar e-sign alone is not accepted for these constitutions.
• Certificate of Incorporation, MOA/AOA or LLP agreement.
• Board resolution or authorisation letter naming the authorised signatory.

Additional for partnerships: partnership deed, authorisation letter for the signatory partner.

Names, dates of birth and addresses must match across PAN, Aadhaar and the application. Even an expanded initial ("R. Kumar" vs "Ramesh Kumar") can trigger an officer query. Fix source documents first.

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Step-by-step process

Everything happens on www.gst.gov.in. There is no offline route and no fee.

Step 1 — Fill Part A of REG-01 and get your TRN

On the portal, go to Services → Registration → New Registration. Select "Taxpayer," choose your state and district, and enter the legal name of the business (exactly as on PAN), PAN, email and mobile number. Verify both with the OTPs sent to you.

On submission, the portal generates a Temporary Reference Number (TRN) — valid for 15 days. Note it down. If the TRN expires before you complete Part B, you start over.

Step 2 — Complete Part B within 15 days

Log back in with the TRN. This is the substantive part — ten sections covering business details, promoter/partner/director particulars, authorised signatory, places of business, goods and services (with HSN/SAC codes), bank accounts and state-specific information. Upload the documents listed above, and choose your registration type carefully: regular or composition, normal taxpayer or special category.

Step 3 — Aadhaar authentication

After submitting Part B, the portal offers Aadhaar authentication for the promoters, partners and authorised signatories. A link goes to their registered mobile and email; they enter the Aadhaar number, validate, and confirm with the OTP.

Complete this within 15 days of submitting Part B (Rule 8(4A)) — without it, no ARN is generated and you may have to restart.

Skipping authentication is allowed, but it routes your application to physical premises verification and stretches approval from 7 working days to 30 days.

Step 4 — ARN generation and officer verification

On successful submission, you get an Application Reference Number (ARN). Track it under Services → Registration → Track Application Status.

A proper officer examines the application. Clean and Aadhaar-authenticated: granted within 7 working days. If clarification is needed, you get REG-03 — reply within 7 working days, and the officer gets a fresh 7 working days from your reply.

Step 5 — Certificate in REG-06

On approval, the Registration Certificate (REG-06) issues electronically with your 15-digit GSTIN. Display it (or a copy) prominently at your principal place of business — the law requires it — and show the GSTIN on every invoice, your signboard and business correspondence.

If the officer rejects your clarification reply, the application is refused in REG-05 with written reasons. Fix the defects and apply afresh.

Deemed approval — the safety net

If the officer takes no action within the prescribed period — 7 working days for Aadhaar-authenticated applications — the application is deemed approved (Rule 9(5)) and the portal generates the registration automatically.

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How long does it take?

| Situation | Typical timeline | |---|---| | Aadhaar authenticated, documents clean | 3–7 working days from ARN | | Officer raises a clarification (REG-03) | +7 working days from your reply | | No Aadhaar authentication (physical verification route) | Up to 30 days | | Officer takes no action at all | Deemed approved on expiry of the prescribed period |

Prepared applicant: under a week. Sloppy one: three to six weeks of back-and-forth. Document quality is the entire difference.

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After registration — your first compliances

The certificate is the beginning, not the end. Put these on your calendar immediately.

Invoicing. Every sale needs a tax invoice (regular) or bill of supply (composition) with GSTIN, HSN/SAC codes, place of supply and correct tax breakup. Get the format right from day one — fixing six months of bad invoices during an assessment is miserable.

GSTR-1 (sales). Due the 11th monthly. Reports every outward supply, invoice by invoice. Your buyers' input credit depends on this filing — file late or wrong and your customers will call you.

GSTR-3B (summary return + payment). Due the 20th of each month. This is where you pay the tax. If your aggregate turnover is up to ₹5 crore, opt into the QRMP scheme — quarterly GSTR-1 and GSTR-3B, with tax paid monthly through a simple challan (PMT-06). It cuts the filing load by two-thirds.

ITC discipline. Claim only what your GSTR-2B shows (auto-generated from suppliers' filings). Reconcile monthly — department notices increasingly start with 2B mismatches.

E-way bills. Moving goods worth over ₹50,000? Generate one on ewaybillgst.gov.in before movement starts. Vehicles without valid e-way bills can be detained.

Display. Show the certificate at your principal place of business; print the GSTIN on your name board and all business documents.

E-invoicing at ₹5 crore. Once your aggregate turnover crosses ₹5 crore, B2B invoices must carry an Invoice Reference Number from the IRP. Plan your billing software upgrade before you hit the threshold, not after.

Annual return. GSTR-9 — and GSTR-9C reconciliation above ₹5 crore turnover — due 31 December following the financial year.

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Common mistakes and rejections

Address proof that proves nothing. The biggest rejection trigger: a rent agreement without the owner's NOC, a utility bill in someone else's name, an address that differs across documents. The officer's first question is always whether the business genuinely operates there. Answer it before they ask.

Skipping Aadhaar authentication. Some applicants skip it thinking it saves time. It does the opposite — it routes you to physical verification and a 30-day timeline. Authenticate unless you have a specific reason not to.

Wrong constitution. Registering as a proprietorship when you're a partnership, or vice versa. The GSTIN is built on the PAN, so fixing this means cancellation and fresh registration.

PAN-Aadhaar name mismatches. "Vijay R" on PAN, "Vijay Raghavan" on Aadhaar. The portal flags it, the officer queries it, and you lose a week. Align the source documents first.

Applying from the wrong state. Registration belongs to the state where you make the taxable supply. Businesses operating in multiple states need a separate registration in each — one GSTIN per state, all under the same PAN.

Missing the 30-day window. Once you cross the threshold or trigger Section 24, the 30-day clock starts. Late applicants can still register, but liability and penalty exposure run from the date they became liable — not the application date.

Composition scheme regret. Opting for composition to save paperwork, then landing a B2B client who needs a tax invoice. Switching back to regular is possible but takes effect prospectively — the intervening period's lost input credit doesn't come back.

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Penalties for not registering

Section 122(1)(viii). A taxable person who fails to obtain registration despite being liable faces a penalty of ₹10,000 or the tax evaded, whichever is higher. This applies per offence — it is not a one-time slap.

Best-judgment assessment (Section 62). If you were liable and didn't register or file, the officer can assess your tax liability to the best of their judgment — and you can assume their judgment will not flatter you. You then get 30 days to file the returns and the assessment is withdrawn; miss that, and it stands.

Interest. Tax paid late carries interest under Section 50 — currently 18% per annum on the net cash liability. It runs from the day after the due date until payment.

No input credit for the unregistered period. Even if you register late, you cannot claim input tax credit for the period before registration. That credit is gone permanently — for a business with heavy input costs, this often hurts more than the penalty.

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How we help

Eligibility check first. We examine your turnover, business model and customer base and tell you plainly whether you must register, should register or can wait — and whether regular or composition fits. If registration doesn't help you, we say so.

Document review before filing. We check PAN, Aadhaar, address proof and bank documents for the mismatches that trigger officer queries — before anything reaches the portal.

End-to-end filing. Part A, TRN, Part B, uploads, HSN/SAC selection, Aadhaar authentication, ARN tracking and query follow-up. You answer our questions once; we handle the portal.

Post-registration setup. Invoice format, GSTR-1/3B calendar, QRMP evaluation, e-way bill process and e-invoicing readiness — so compliance doesn't quietly lapse while the certificate sits in your downloads.

Government charges: nil. Registration is free. Our professional fee is quoted in writing before we start, as a single fixed number.

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FAQ

Frequently asked questions

21 answers from our consultants.

Why does it cost ₹999 when the government fee is free or nil?+

It's not just our fee — there are real third-party costs in every incorporation: name approval, PAN/TAN application, and Digital Signatures for the directors. Those add up to roughly ₹6,000. Our professional fee is only the amount above that — it covers document checking, SPICe+ filing, MCA follow-ups, and getting your certificate without you having to figure out the process yourself.

I just crossed ₹20 lakh in turnover this month. When exactly do I need to register?+

Within 30 days of the day you crossed it — not the month-end, not "when I get around to it." Liability and penalty exposure run from the date you became liable, not the date you apply.

Is GST registration really free? What's the catch?+

The government charges nothing — no application or certificate fee. The real cost is the compliance that follows: monthly returns, invoice discipline, reconciliation. That's a time cost, not a money cost. Anyone quoting a "government fee" for GST registration is misleading you.

I'm a freelancer selling services only to Indian clients, turnover around ₹12 lakh. Should I register?+

No. You're below the ₹20 lakh services threshold, selling intra-state to end clients — registration buys you monthly filing in exchange for nothing. The one exception: GST-registered clients who need your tax invoice for their credit. Then it's a business decision, not a legal one.

I sell handmade soaps on Instagram and ship across India. Turnover is only ₹8 lakh. Do I need GST?+

Yes — two independent triggers. Shipping across state lines is inter-state supply, which mandates registration at any turnover under Section 24. Listing on a marketplace is a second trigger. The ₹8 lakh figure is irrelevant once either applies.

What's the difference between the TRN, ARN and GSTIN? The portal keeps throwing acronyms at me.+

TRN (Temporary Reference Number): from Part A, valid 15 days, just lets you log back in for Part B. ARN (Application Reference Number): from successful Part B submission — your tracking number during verification. GSTIN: the final 15-digit number on your certificate. TRN expires, ARN is history, GSTIN endures until cancellation.

My Aadhaar mobile number is an old one I don't use anymore. Will this block my registration?+

Yes — the OTP goes to the mobile linked with Aadhaar, not the one in your application. Update it at an Aadhaar centre or via UIDAI first. Don't start the GST application until that's done, or you'll burn the 15-day Part B window.

I chose not to do Aadhaar authentication. What happens now?+

Your application goes for physical verification — an officer visits to confirm you operate there. Timeline stretches to 30 days. Not a punishment, just the slower route. Genuine, accessible premises: no problem beyond the wait. A friend's address you've never visited: expect trouble.

Can I use my home address as the principal place of business?+

Yes. You'll need ownership proof — or a family member's consent letter plus their ownership proof — and ideally a utility bill. The officer may still verify physically, so keep the place presentable and ensure someone can receive them with basic business records.

I have one PAN but businesses in three states. One registration or three?+

Three — one GSTIN per state under the same PAN. Registration is state-specific because SGST belongs to the supply state. Same portal, same PAN, separate applications; the registrations are distinct.

What is aggregate turnover, exactly? Does it include my exempt sales?+

Yes — aggregate turnover adds up taxable supplies, exempt supplies, exports and inter-state supplies for everyone under the same PAN, across India. Excluded: inward supplies under reverse charge, and the taxes themselves. The common trap: ₹25 lakh in taxable sales plus ₹20 lakh in exempt sales is ₹45 lakh aggregate turnover — well past the threshold.

I'm on the composition scheme but just got a big B2B order. Can I issue a tax invoice for it?+

No — only bills of supply, and your buyer gets no input credit. If B2B work is growing, switch to regular. The switch is prospective only; input credit on existing stock gets complicated. Get advice before accepting the order, not after promising a tax invoice.

How does the QRMP scheme actually work? Is it worth opting in?+

Up to ₹5 crore turnover, QRMP lets you file GSTR-1 and GSTR-3B quarterly while paying tax monthly via challan PMT-06 — either 35% of last quarter's liability or your self-assessed amount. Four filings a year instead of twenty-four, no real downside.

My supplier hasn't filed GSTR-1 for two months. How does this hurt me?+

Your credit appears in GSTR-2B only from invoices your suppliers actually file. No filing from them, no credit for you — even with the invoice in hand and tax paid. You end up paying that tax again in cash via GSTR-3B. Vet suppliers for filing discipline before large orders; chasing vendors becomes a monthly ritual.

What is GSTR-2B and why does everyone keep telling me to reconcile it?+

GSTR-2B is your auto-generated input credit statement, built from suppliers' GSTR-1 filings — effectively the department telling you what credit it will allow. Claim more than 2B shows and expect a notice. Monthly reconciliation (your purchase register vs 2B) prevents most GST disputes.

I missed the 30-day window and registered two months late. What now?+

Register immediately — late beats never by a wide margin. Liability runs from the date you crossed the threshold, so you'll owe tax plus 18% interest for the gap, and Section 122 penalty exposure exists. But voluntary compliance now is far cheaper than detection later. Pre-registration input credit is permanently lost — don't delay further.

Do I need a DSC for GST registration?+

Only for companies and LLPs — they must sign with a Class 2 or 3 DSC of the authorised signatory. Proprietors, partnerships and HUFs can use Aadhaar e-sign or EVC (OTP). If incorporating, sort the DSC during incorporation so it doesn't hold up GST filing.

Can my GST registration be cancelled? What happens to my input credit?+

Yes — apply in REG-16 on closure or permanent fall below thresholds; the officer can also cancel suo moto for non-filing or fraud. On cancellation, reverse input credit on remaining stock and capital goods (Section 18(4)), and file GSTR-10 within three months.

I'm an NRI starting a business in India. Anything different for me?+

Same process, two watch-outs. The Indian authorised signatory needs valid PAN and Aadhaar for authentication. And if you're a non-resident taxable person (no fixed establishment in India), register in that category — it needs an advance tax deposit, lasts 90 days maximum (extendable once), and carries different obligations.

E-invoicing — does it apply to me? My turnover just crossed ₹5 crore.+

Yes, for B2B supplies. Once aggregate turnover exceeds ₹5 crore in any financial year since 2017-18, B2B and export invoices need an IRN from the Invoice Registration Portal before issue — without it, the invoice isn't valid. B2C is exempt. Upgrade billing software now; manual IRN generation for hundreds of invoices will break your dispatch cycle.

I supply both goods and restaurant services. Can I take composition for one and regular for the other?+

No — one PAN, one scheme per state. If any part is ineligible for composition, the whole state registration is regular. The service-provider composition (₹50 lakh, 6%) is itself a single scheme for mixed suppliers. Structure accordingly before applying.

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