GST Registration for Startups: When It's Mandatory and How to Apply
Authored by -Souvik Das, Executive at Outsource360
Ask ten founders when a startup has to register for GST and nine will say Rs 40 lakh. It's the most repeated number in Indian small-business content, and for most startups reading this, it is the wrong number entirely.
Rs 40 lakh is the threshold for a business engaged exclusively in the supply of goods. If you sell software, run an agency, consult, design, build websites, or do anything else that is a service in the eyes of the law, your threshold is Rs 20 lakh. Half. And in Manipur, Mizoram, Nagaland and Tripura it is Rs 10 lakh. A quarter.
Here's the part that matters more. For a very large share of startups, turnover is not the trigger at all. Section 24 of the Central Goods and Services Tax Act, 2017 lists eleven categories of person who must register regardless of turnover, and a startup can land in one of them in its first week of trading. Ship a physical product to a customer in another state? Registration required from the first rupee. Pay a foreign contractor or a consultant abroad? Reverse charge applies, and reverse charge is a compulsory-registration trigger. List your goods on Amazon or Flipkart? There's a carve-out, and it is narrower than most sellers assume.
So the honest answer to "when is GST registration mandatory for a startup" is not a number. It is a short sequence of questions asked in the right order, and turnover is the last of them, not the first.
The registration process itself changed on 1 November 2025. Notification No. 18/2025-Central Tax, dated 31 October 2025, inserted two new rules into the CGST Rules. Rule 9A lets the common portal grant registration electronically within three working days, with no officer touching the file, where the applicant's data clears the system's risk parameters. Rule 14A adds an optional simplified route for small applicants whose monthly output tax liability on business-to-business supplies stays under Rs 2.5 lakh. Both are genuinely faster than the old seven-working-day rule. One of them has a ceiling attached that a growing startup should think about before opting in, and a formal exit procedure if it wants out.
And there's a clock most guides mention in passing and then fail to price. Section 25(1) gives you thirty days from the date you become liable. Miss it and your registration takes effect from the date it is granted rather than the date liability arose, which means the input tax credit sitting in your pre-registration stock is gone under section 18(1)(a). That is a real cash cost, not a paperwork inconvenience.
What follows is the decision sequence, the documents, the portal steps as they actually run in 2026, the two new fast-track routes, and the arithmetic of registering late.
GST registration is mandatory for a startup when its aggregate turnover crosses Rs 20 lakh for services or Rs 40 lakh for goods (Rs 10 lakh and Rs 20 lakh respectively in specified states), or, regardless of turnover, when section 24 of the CGST Act applies: inter-state supply of goods, liability under reverse charge, supply through an e-commerce operator, or acting as a casual or non-resident taxable person. Apply within 30 days of becoming liable, in FORM GST REG-01 on gst.gov.in. Registration is normally granted within three to seven working days.
Read that as a checklist rather than a summary. Each line below unpacks one part of it, starting with the number everybody gets wrong.
On this page
The Rs 40 lakh figure is the wrong threshold for most startups
The triggers that ignore your turnover completely
Selling through a marketplace changes the answer again
What changed on 1 November 2025
How to apply for GST registration, step by step
The 30-day clock, and what missing it costs
Registering before you have to
The Rs 40 lakh figure is the wrong threshold for most startups
Section 22(1) of the CGST Act sets the base threshold at Rs 20 lakh, and Rs 10 lakh for special category states. The Rs 40 lakh figure is not in the section at all. It sits in a proviso that lets the Government raise the limit for one specific kind of supplier, and in the notification issued under it.
Two thresholds, and which one a startup is actually on
Notification No. 10/2019-Central Tax, dated 7 March 2019 and effective from 1 April 2019, exempts from registration any person "engaged exclusively in the supply of goods" whose aggregate turnover in the financial year does not exceed Rs 40 lakh. Note the word exclusively. One consulting invoice, one design retainer, one line of service revenue alongside the product, and the exemption stops applying to you.
The statute softens this in exactly one place. The explanation to section 22(1) says a person is still treated as engaged exclusively in the supply of goods even if they also earn interest or discount on deposits, loans or advances. Interest income from a fixed deposit doesn't knock a product company off the Rs 40 lakh threshold. A single paid workshop does.
For a services startup, then, the number is Rs 20 lakh. That is roughly Rs 1.67 lakh of billing a month, or one moderately good client. Most agencies, SaaS companies and consultancies cross it inside the first year without noticing, because founders are watching bank balance rather than aggregate turnover.
Ten places where the Rs 40 lakh figure never applied
The same notification carves out four groups. The exemption does not reach persons required to register compulsorily under section 24, persons supplying ice cream and other edible ice, pan masala, or tobacco and manufactured tobacco substitutes, persons who opt for voluntary registration under section 25(3), and persons making intra-state supplies in ten named states and union territories.
That last list is Arunachal Pradesh, Manipur, Meghalaya, Mizoram, Nagaland, Puducherry, Sikkim, Telangana, Tripura and Uttarakhand. A goods startup in Hyderabad has a Rs 20 lakh threshold, not Rs 40 lakh, because Telangana declined the enhancement. We'd flag that one specifically, because Telangana is not a state most people expect to find on a special-threshold list, and Hyderabad has a lot of early-stage product companies in it.
What counts towards aggregate turnover
Aggregate turnover under section 2(6) is wider than revenue. It takes every taxable supply, every exempt supply, every export and every inter-state supply made by all persons holding the same PAN, computed on an all-India basis. It excludes GST itself and excludes inward supplies on which you pay tax under reverse charge.
Two consequences trip founders up. First, exempt income counts. A company earning Rs 15 lakh from taxable consulting and Rs 8 lakh from an exempt educational service has aggregate turnover of Rs 23 lakh and has crossed the Rs 20 lakh line. Second, it is PAN-wide, not state-wide and not branch-wide. Two offices in two states under one PAN aggregate into a single figure, and once that figure crosses the threshold you register in every state you supply from.
What you supply | Where you supply from | Registration threshold |
Goods only | Most states and union territories | Rs 40 lakh |
Goods only | Arunachal Pradesh, Manipur, Meghalaya, Mizoram, Nagaland, Puducherry, Sikkim, Telangana, Tripura, Uttarakhand | Rs 20 lakh |
Services, or goods and services together | Most states and union territories | Rs 20 lakh |
Services, or goods and services together | Manipur, Mizoram, Nagaland, Tripura | Rs 10 lakh |
Anything, where section 24 applies | Anywhere in India | No threshold, register from the first supply |
Work out which row you are on before you do anything else. It decides how much runway you have, and for a lot of startups the honest answer is that the threshold row is irrelevant because section 24 got there first.
The triggers that ignore your turnover completely
Section 24 opens with the words "notwithstanding anything contained in sub-section (1) of section 22". That is the drafting equivalent of a trump card. If any of its clauses catches you, the Rs 20 lakh and Rs 40 lakh numbers stop being relevant.
Section 24, read in the order a startup usually hits it
The section lists eleven categories plus a residual power to notify more. Four of them account for almost every early-stage case we see.
Persons making any inter-state taxable supply, under clause (i). Read with the services carve-out below, this is the clause that catches product companies first.
Persons required to pay tax under reverse charge, under clause (iii). One qualifying inward supply is enough.
Persons supplying goods or services through an e-commerce operator required to collect tax at source, under clause (ix).
Casual taxable persons, under clause (ii), which covers a founder taking a stall at a trade fair in a state where the business has no fixed premises.
The rest matter less often but do come up: non-resident taxable persons, persons deducting tax under section 51, agents supplying on behalf of another taxable person, Input Service Distributors, e-commerce operators themselves, offshore suppliers of online information and database access or retrieval services, and offshore suppliers of online money gaming.
Section 24 clause | Who it catches | Typical startup trigger |
(i) Inter-state taxable supply | Any supplier crossing a state border | Shipping a product to a customer in another state |
(ii) Casual taxable person | Occasional supply where you have no fixed place of business | Selling at an exhibition or pop-up in another state |
(iii) Reverse charge liability | Recipient, not supplier | Paying a foreign consultant, or a goods transport agency |
(v) Non-resident taxable person | Foreign entity supplying in India | An overseas parent invoicing Indian customers directly |
(vii) Agent supplying on behalf of another | Commission agents, C and F agents | Reselling under a principal's brand as an agent |
(ix) Supply through an e-commerce operator | Marketplace sellers, subject to the 2023 carve-out | Listing on Amazon, Flipkart, Meesho or a services platform |
(x) E-commerce operator collecting TCS | The platform itself | Building a marketplace rather than selling on one |
Inter-state supply treats goods and services differently
This is the single most useful distinction in the whole topic, and most published guides flatten it into one line that says inter-state supply means compulsory registration. That is true of goods. It is not true of services.
Notification No. 10/2017-Integrated Tax, dated 13 October 2017, exempts persons making inter-state supplies of taxable services from registration where aggregate turnover stays within Rs 20 lakh (Rs 10 lakh for special category states other than Jammu and Kashmir). The exemption is issued under section 23(2), which is why it can override the section 24 obligation.
Here's what that actually looks like. A Bengaluru design studio billing Rs 9 lakh a year to a client in Mumbai is making an inter-state supply and is not required to register, because services are covered. A Bengaluru hardware startup shipping a Rs 4,000 device to one customer in Mumbai is making an inter-state supply of goods, is not covered, and must register before it dispatches. Same border, same invoice value bracket, opposite answers.
The mistake we see most often is a services founder registering far too early on the strength of a blog post about inter-state supply, then carrying monthly return filing and a professional's fee for two years before there was any obligation at all.
The reverse charge trigger nobody sees coming
Clause (iii) catches recipients, not suppliers, and that inversion is what makes it easy to miss. If your startup is liable to pay tax under reverse charge on anything it buys, you must register, whatever your turnover.
For an early-stage company the usual candidates are import of services, legal services from an advocate or a firm of advocates, sponsorship, services of a goods transport agency, and director's remuneration paid to a non-executive director. Import of services is the common one. Retain a product consultant in Berlin, commission a translation agency in Manila, buy a specialist research report from a firm abroad, and you have received a service from outside India and picked up a reverse charge liability with it.
One important exception keeps most SaaS subscriptions out of this. Where the foreign supplier is providing online information and database access or retrieval services, the obligation to register and charge Indian GST sits with that supplier under section 24(xi), not with you. Which is why an unregistered startup paying for a cloud subscription is usually fine, while the same startup paying an individual consultant abroad is usually not. The line is not the size of the invoice. It is whether the service is automated and delivered over the internet with minimal human intervention.
Worth flagging: reverse charge liability doesn't just force registration. Once registered, you pay the tax in cash, then claim it back as input tax credit in a later return. The credit usually comes back. The working capital gap in between is real.
Selling through a marketplace changes the answer again
Marketplace selling used to mean automatic registration, full stop. Since 1 October 2023 that is only half true, and which half you are on depends on whether you sell goods or services.
Goods through an e-commerce operator: the 2023 carve-out
Notification No. 34/2023-Central Tax, dated 31 July 2023 and effective from 1 October 2023, exempts persons supplying goods through an e-commerce operator from compulsory registration under section 24(ix), provided every one of four conditions holds.
Aggregate turnover, computed all-India, stays within the section 22(1) threshold for the state you supply from.
You make no inter-state supply of goods at all.
You supply from only one state or union territory.
You hold a PAN, declare it and your business details on the common portal, and obtain an enrolment number before making any supply through the operator.
That fourth condition is a hard gate. No enrolment number, no supplies through the platform. And condition two rules out most marketplace sellers in practice, because the whole point of listing on a national marketplace is that a buyer in any state can order. The carve-out fits a seller using a platform to reach their own city, not a seller using it to reach the country.
Services through a platform, and why the carve-out stops short
Notification 34/2023 says goods. It does not extend to services. So a freelance developer taking work through a services marketplace, a designer on a creative platform, a tutor on an education platform, all remain caught by section 24(ix) and must register regardless of turnover.
There is one narrow relief. Where the platform is liable to pay the tax itself under section 9(5) of the CGST Act (the notified categories, which include passenger transport, accommodation below the hotel registration threshold, housekeeping and restaurant supplies through an operator), the underlying supplier is outside clause (ix) and falls back on the ordinary threshold. A cab driver on a ride-hailing app is not required to register. A copywriter on a freelance marketplace is.
Billing clients outside India
Export revenue is the case where founders most often assume the worst and register far earlier than they need to. Exports of services are inter-state supplies under section 7(5) of the Integrated Goods and Services Tax Act, 2017, so the instinct is understandable. The instinct is also usually wrong.
Under Rs 20 lakh, the export itself doesn't force registration
Notification 10/2017-Integrated Tax applies to exports the same way it applies to a supply from Bengaluru to Mumbai. Services are services. A two-person studio in Pune invoicing Rs 14 lakh a year to clients in the United States is making inter-state supplies of taxable services, is inside the Rs 20 lakh aggregate turnover limit, and is not required to register.
But watch the aggregate turnover definition again, because export revenue counts towards it in full. A studio at Rs 14 lakh of export billing plus Rs 8 lakh of Indian client work is at Rs 22 lakh and has crossed. Founders frequently exclude export revenue from the calculation on the theory that it is zero-rated. Zero-rated is a rate, not an exclusion.
Over the line, file the LUT before you invoice
Once registered, exports are zero-rated under section 16 of the IGST Act, and you have two ways to handle them. Pay IGST on the export invoice and claim a refund afterwards, or furnish a Letter of Undertaking in FORM GST RFD-11 and export without paying the tax at all.
For a cash-constrained startup, the LUT wins every time. It is free, it is filed online, it generates an Application Reference Number immediately with no approval to wait for, and it removes the refund cycle entirely. The catch? It runs for one financial year, 1 April to 31 March, and has to be filed fresh before each new year starts. Let it lapse and your first export invoice of April is legally an IGST-bearing supply, which is an expensive way to learn the renewal date.
What changed on 1 November 2025
Registration used to be a seven-working-day wait at best, and thirty days if anything about the application drew attention. Notification No. 18/2025-Central Tax, dated 31 October 2025, brought in the Central Goods and Services Tax (Fourth Amendment) Rules, 2025 and rewrote the timeline for applicants who fit.
Rule 9A and the three-working-day grant
Rule 9A allows the common portal to grant registration electronically, without any officer verifying the application, within three working days of submission. Eligibility is decided by the system rather than by a person: it runs data analysis and risk parameters over PAN and Aadhaar validation, the address proof, and the applicant's and promoters' compliance history.
The baseline in rule 9 hasn't gone anywhere. Where rule 9A doesn't apply, the proper officer still has seven working days to approve or to issue a notice in FORM GST REG-03, and the applicant then has seven working days to reply in REG-04. Where the applicant hasn't completed Aadhaar authentication, or has been flagged by the portal for physical verification of the place of business, or the officer decides physical verification is warranted, the window stretches to thirty days. Rule 9(5) still deems the registration approved if the officer does nothing at all within the applicable period.
Rule 14A: a fast lane with a ceiling on it
Rule 14A is the opt-in route, and it's aimed squarely at small businesses. Choose it in FORM GST REG-01 and you get the three-working-day electronic grant, on two conditions.
Your total monthly output tax liability on business-to-business supplies (CGST, SGST or UTGST, IGST and compensation cess together) will not exceed Rs 2,50,000.
Aadhaar authentication is completed, by OTP or biometric, for the primary authorised signatory and at least one promoter or partner, unless you are in a category notified as exempt under section 25(6D).
Only one registration per PAN per state or union territory can sit under rule 14A. And the Rs 2.5 lakh figure is a tax number, not a revenue number, so translate it before you decide. At the standard 18 per cent rate it corresponds to roughly Rs 13.9 lakh of monthly B2B supply value, or a run rate near Rs 1.7 crore a year. That is a lot of headroom for a seed-stage company and no headroom at all for one that is about to close a Series A.
The better approach, in our view, is to look at your next twelve months rather than your last three before ticking the box. Rule 14A is a genuine convenience if you'll stay well under the ceiling. If you expect to blow through it inside a year, the ordinary route under rule 9A may still give you the three-day grant without the exit paperwork.
Getting back out of Rule 14A
Leaving is a formal process, not a portal toggle. Withdrawal is applied for in FORM GST REG-32, with the approval order issued in REG-33, and the conditions are specific.
You must have filed all returns due from the effective date of registration, plus a minimum filing history: at least three months of returns if the application is made before 1 April 2026, and at least one tax period if made on or after that date. No proceedings for cancellation under section 29 can be pending. Aadhaar authentication is required again for the primary authorised signatory and at least one promoter or partner, and the draft application and that authentication have to be completed within fifteen days. While the withdrawal is being processed, core and non-core amendments and self-cancellation are all blocked.
After withdrawal, output tax liability above Rs 2.5 lakh is reportable from the first day of the following month, and you can't backdate the change. So the practical sequence for a company that outgrows the ceiling is: notice it early, file the withdrawal in the month before you cross, and don't discover the problem while raising the invoice that breaches it.
How to apply for GST registration, step by step
The application is free, it runs entirely on gst.gov.in, and it splits into two parts filed under one temporary reference number. Most rejections come from mismatched documents rather than from anything substantive, so the preparation matters more than the form filling.
What to have ready before you open the portal
Every applicant needs a PAN, because section 25(6) makes it a precondition for the grant of registration. Beyond that the set varies by entity type, and the address proof is where applications most often stall.
Document | Sole proprietor | Partnership or LLP | Private limited company |
PAN | Individual PAN | Firm or LLP PAN, plus partners' PAN | Company PAN, plus directors' PAN |
Identity and address proof of promoters | Aadhaar and PAN of the proprietor | Aadhaar and PAN of every partner | Aadhaar and PAN of every director |
Constitution of business | Not applicable | Partnership deed, or LLP incorporation certificate | Certificate of incorporation, memorandum and articles |
Principal place of business proof | Latest electricity bill, property tax receipt or municipal khata for owned premises; rent or lease agreement plus the owner's ownership proof and a no-objection certificate for rented premises | ||
Bank account proof | Cancelled cheque, bank statement or first page of the passbook, in the name of the business | ||
Authorisation | Not required | Letter of authorisation for the authorised signatory | Board resolution appointing the authorised signatory |
Photograph | Proprietor | All partners and the authorised signatory | All directors and the authorised signatory |
Coworking desks and virtual offices are accepted, but they attract scrutiny, so carry the full chain: the agreement in your entity's name, the operator's own ownership or lease proof, a no-objection certificate, and a recent utility bill for the building. A gap anywhere in that chain is the most common reason a REG-03 notice lands.
Part A and the temporary reference number
Part A of FORM GST REG-01 asks for PAN, mobile number, email address and state. Each is verified by OTP, and the PAN is validated against the Income Tax database. Get it right first time, because the explanation to rule 9(2) specifically excludes PAN, state, mobile number and email address from what can be corrected later by way of clarification. Those four fields are effectively locked once submitted.
The portal then issues a Temporary Reference Number, valid for fifteen days. Part B has to be completed inside that window or the TRN lapses and you start again.
Part B, and the fields that get applications flagged
Part B runs across ten tabs: business details, promoters and partners, authorised signatory, authorised representative, principal place of business, additional places of business, goods and services, state-specific information, Aadhaar authentication and verification.
Two of them deserve more care than they usually get. Under goods and services, you declare the HSN codes for goods and SAC codes for services you'll supply, up to five of each. Pick them to match what you actually invoice, because the codes here set expectations that your returns will be read against later. Under business details, the date of commencement of business and the date on which liability to register arose are separate fields, and it's the second one that drives your effective date of registration. Enter the date you crossed the threshold or the date the section 24 trigger fired, not the date you decided to fill in the form.
Aadhaar authentication, and what happens if you skip it
Aadhaar authentication under rule 8(4A) is technically optional and practically essential. Complete it and you are in line for the seven-working-day route, or the three-working-day route under rule 9A or 14A. Decline it and rule 9's proviso applies: the application goes to physical verification of your premises and the timeline moves to thirty days.
Authentication is by OTP to the Aadhaar-linked mobile, or by biometric verification at a designated GST Suvidha Kendra where the portal routes you there on risk grounds. Biometric routing has expanded across states progressively, so treat an in-person slot as a possibility rather than an exception, and book it promptly when the link arrives. Under rule 14A the authentication isn't optional at all.
After submission
You get an Application Reference Number and then one of four outcomes. Automatic electronic grant within three working days under rule 9A or 14A. Approval by the proper officer within seven working days. A notice in REG-03 seeking clarification, which you answer in REG-04 within seven working days. Or, where Aadhaar authentication is missing or the portal has flagged you for physical verification, a thirty-day process with a visit to your premises.
On approval, the certificate of registration is issued in FORM GST REG-06 and your fifteen-digit GSTIN is generated: two digits for the state code, ten for the PAN, one entity code, one blank and one check digit. Login credentials follow, and the first return obligation starts from the tax period in which registration takes effect.
The 30-day clock, and what missing it costs
Section 25(1) requires the application within thirty days from the date on which you become liable to be registered. Casual taxable persons and non-resident taxable persons apply at least five days before commencing business. Those two sentences are where the money is, and almost every guide reproduces them without saying why they matter.
Your effective date moves
Rule 10(2) says that where the application is submitted within thirty days of becoming liable, registration takes effect from the date liability arose. Rule 10(3) says that where it is submitted late, registration takes effect from the date it is granted.
Read those together. Apply on time and the state treats you as registered from the day you crossed the line, so the supplies you made in the intervening weeks sit inside your registration. Apply late and there's a gap in which you were legally required to be registered, were not, and were still supplying. You'll owe the tax on those supplies. What you won't have is a clean way to recover it from customers who were invoiced without GST months earlier.
The credit you forfeit
Section 18(1)(a) is the clause that turns lateness into a number. A person who applies within thirty days and is granted registration is entitled to input tax credit on inputs held in stock, and inputs contained in semi-finished and finished goods held in stock, on the day immediately preceding the date liability arose. The claim is made in FORM GST ITC-01.
That entitlement is conditional on the thirty days. Miss the window and the credit on that opening stock is simply gone. For a product startup holding, say, Rs 12 lakh of inventory bought at 18 per cent, that's roughly Rs 1.8 lakh of credit written off because a form went in five weeks late. Services businesses lose less here, since the relief covers goods in stock rather than past service inputs, which is worth knowing before you assume the risk is symmetric.
The penalty, and who else notices
Section 122(1) of the CGST Act sets the penalty for a person liable to be registered who fails to obtain registration at Rs 10,000 or the amount of tax evaded, whichever is higher. On a genuine oversight the Rs 10,000 floor usually governs. On a business that has been trading unregistered for a year, the tax figure governs, and it is the larger number by a wide margin.
The officer can also register you without your involvement. Section 25(8) allows registration in the prescribed manner where a person liable to register fails to do so, which in practice follows a survey, an enquiry or data the department already holds from your customers' returns. Getting registered by the department is a worse starting position than registering yourself, because the effective date, the assessed liability and the penalty are all determined without your input.
Registering before you have to
Plenty of startups register voluntarily under section 25(3) while they're nowhere near any threshold. Sometimes that's right. Often it's a habit picked up from an accountant who registers everyone by default.
Voluntary registration is a one-way door
Section 25(3) is short and its consequence is not: once registered voluntarily, "all provisions of this Act, as are applicable to a registered person, shall apply to such person". Every one of them. Monthly or quarterly GSTR-1 and GSTR-3B, the annual return where applicable, e-invoicing once you cross its threshold, and late fees on nil returns filed late exactly as on returns with tax on them.
There's also a hard stop worth knowing about. Returns can no longer be filed after three years from their original due date, so a dormant registration left unfiled doesn't stay quietly fixable. And exiting requires cancellation under section 29 plus a final return in GSTR-10, which is its own small project.
The B2B client argument, and when it holds
The strongest genuine reason to register early is that your customers are registered businesses. A B2B buyer can't claim input tax credit on your invoice if you have no GSTIN, which makes your price effectively 18 per cent more expensive than a registered competitor's for the same work. On a Rs 5 lakh engagement, that is Rs 90,000 of credit the client forfeits by choosing you. Many procurement teams won't onboard an unregistered vendor at all.
So the test is who pays your invoices. Selling to registered businesses, register early and treat it as a cost of being in the market. Selling to consumers, individuals or exempt entities, nobody downstream is claiming credit, registration adds compliance without adding competitiveness, and the threshold is there to be used.
Composition scheme, if your buyers are consumers
Where you do have to register but sell mainly to end customers, section 10 offers a lighter regime. Goods suppliers and restaurants with aggregate turnover up to Rs 1.5 crore (Rs 75 lakh in specified north-eastern states and Uttarakhand) can opt in; service providers and mixed suppliers can opt in up to Rs 50 lakh under the parallel scheme notified in 2019, at 6 per cent.
You pay a flat rate on turnover, file quarterly in CMP-08 with one annual return in GSTR-4, and issue a bill of supply rather than a tax invoice. What you give up is the right to collect GST from customers, the right to claim input tax credit, and the ability to make inter-state outward supplies at all. For a neighbourhood retailer that trade is usually worth it. For anything B2B it rarely is, because your customers get no credit from you either way.
One more thing, since it comes up constantly: recognition by the Department for Promotion of Industry and Internal Trade changes nothing here. DPIIT recognition brings the section 80-IAC income tax holiday, IPR fee rebates and self-certification under labour and environment laws. It brings no GST threshold relief, no exemption and no concessional rate. A recognised startup registers on exactly the same triggers as anyone else, and the rate restructuring that took effect on 22 September 2025, which collapsed the old six-slab structure into 5 per cent and 18 per cent with a 40 per cent demerit rate, applies to it identically.
GST also isn't the only clock running. If you've just incorporated, the annual ROC compliance calendar starts at the same time, INC-20A falls due within 180 days, and the choice you made between a private limited company, an LLP and an OPC changes which of those filings apply. Founders who registered the business recently tend to treat GST as the next isolated task. It works better as one line in a single compliance calendar.
If the registration itself is straightforward but keeping up with the monthly returns is what worries you, that is the part worth handing off. Outsource360 runs tax registration and compliance alongside outsourced bookkeeping, so the GSTR-1 and GSTR-3B cycle runs off books that are already closed. Book a consultation if that is the trade you want to make.
Frequently asked questions
Is GST registration mandatory for startups in India?
Only when a trigger applies. A startup must register once aggregate turnover crosses Rs 20 lakh for services or Rs 40 lakh for goods (Rs 10 lakh and Rs 20 lakh respectively in specified states), or immediately, regardless of turnover, if section 24 of the CGST Act applies. There is no blanket exemption for startups and no special startup threshold.
What is the GST registration limit for a startup in 2026?
Rs 40 lakh of aggregate turnover for a business supplying goods exclusively, Rs 20 lakh for services or for any mix of goods and services. The goods limit drops to Rs 20 lakh in Arunachal Pradesh, Manipur, Meghalaya, Mizoram, Nagaland, Puducherry, Sikkim, Telangana, Tripura and Uttarakhand. The services limit drops to Rs 10 lakh in Manipur, Mizoram, Nagaland and Tripura.
Does a service-based startup get the Rs 40 lakh threshold?
No. Notification No. 10/2019-Central Tax applies only to a person engaged exclusively in the supply of goods. A single service invoice takes you outside it and puts you on the Rs 20 lakh threshold for the whole financial year.
Do I need GST registration to sell to clients in another state?
For goods, yes, from the first supply, under section 24(i). For services, not until aggregate turnover reaches Rs 20 lakh, because Notification No. 10/2017-Integrated Tax exempts inter-state suppliers of taxable services below that limit.
Do I need GST registration if all my clients are outside India?
Not by reason of the export alone. Export of services is an inter-state supply, but the same Notification 10/2017-Integrated Tax exemption applies, so a service exporter within Rs 20 lakh of aggregate turnover need not register. Export revenue counts in full towards that Rs 20 lakh.
Is GST registration mandatory for selling on Amazon or Flipkart?
Usually yes. Notification No. 34/2023-Central Tax exempts small goods sellers, but only if they stay within the state threshold, make no inter-state supply, supply from a single state, and obtain an enrolment number on the portal first. National marketplace selling breaks the inter-state condition almost immediately. Sellers of services through a platform are not covered by the exemption at all.
Does paying a foreign consultant or freelancer trigger GST registration?
Yes, in most cases. Import of services attracts tax under reverse charge, and section 24(iii) makes anyone liable under reverse charge register regardless of turnover. Automated online services in the OIDAR category are the exception, because there the foreign supplier is the one required to register in India.
How long does GST registration take in 2026?
Three working days where the application qualifies under rule 9A or rule 14A and clears the portal's risk parameters. Seven working days on the ordinary route in rule 9. Thirty days where Aadhaar authentication was not completed, or the portal flags the application for physical verification of the place of business.
What is Rule 14A of the CGST Rules?
An optional simplified registration route introduced by Notification No. 18/2025-Central Tax with effect from 1 November 2025. It grants registration electronically within three working days to applicants whose monthly output tax liability on business-to-business supplies stays within Rs 2.5 lakh, subject to Aadhaar authentication, with one such registration per PAN per state.
How do I withdraw from the Rule 14A scheme?
By filing FORM GST REG-32 on the portal. You need all returns filed from the effective date of registration, plus at least three months of returns if applying before 1 April 2026 or at least one tax period if applying on or after that date, no pending cancellation proceedings under section 29, and fresh Aadhaar authentication of the primary authorised signatory and one promoter or partner.
How many days do I have to apply for GST registration?
Thirty days from the date you become liable, under section 25(1). A casual taxable person or non-resident taxable person applies at least five days before commencing business.
What happens if I register late?
Registration takes effect from the date it is granted rather than the date liability arose, under rule 10(3). You lose the section 18(1)(a) credit on stock held before registration, you still owe tax on supplies made in the gap, and section 122(1) provides a penalty of Rs 10,000 or the tax evaded, whichever is higher.
What documents are needed for GST registration?
PAN of the business and of promoters, Aadhaar for authentication, proof of constitution such as the certificate of incorporation or partnership deed, proof of the principal place of business, bank account proof in the business name, photographs of promoters and the authorised signatory, and a board resolution or letter of authorisation appointing that signatory.
Can I get GST registration with a virtual office or coworking address?
Yes, provided the documentation chain is complete: an agreement in your entity's name, the operator's ownership or lease proof, a no-objection certificate and a recent utility bill for the premises. Incomplete address proof is the most frequent cause of a REG-03 clarification notice.
Do DPIIT-recognised startups get a GST exemption?
No. Startup India recognition carries income tax benefits under section 80-IAC, IPR fee concessions and self-certification relief under labour and environment laws. It confers no GST threshold relief, exemption or concessional rate.
Should a startup register for GST voluntarily?
It depends on who pays your invoices. If your customers are registered businesses, register early, because they cannot claim input tax credit on an unregistered supplier's invoice and your price is effectively 18 per cent higher to them. If you sell to consumers, voluntary registration under section 25(3) adds full return-filing obligations without a commercial gain.
What is the penalty for not registering under GST?
Rs 10,000 or the amount of tax evaded, whichever is higher, under section 122(1) of the CGST Act. The officer may also register you on their own motion under section 25(8) following a survey or enquiry, with the effective date and liability determined without your input.
References
Central Goods and Services Tax Act, 2017: sections 2(6), 9(5), 10, 18(1)(a), 22, 23, 24, 25, 29 and 122.
Integrated Goods and Services Tax Act, 2017: sections 7(5) and 16.
Central Goods and Services Tax Rules, 2017: rules 8, 9, 9A, 10, 14A and 25.
Notification No. 10/2019-Central Tax, dated 7 March 2019, exempting persons engaged exclusively in the supply of goods with aggregate turnover up to Rs 40 lakh from registration, effective 1 April 2019.
Notification No. 10/2017-Integrated Tax, dated 13 October 2017, exempting persons making inter-state supplies of taxable services below the threshold from registration under section 23(2).
Notification No. 34/2023-Central Tax, dated 31 July 2023, effective 1 October 2023, exempting specified suppliers of goods through an electronic commerce operator from compulsory registration.
Notification No. 18/2025-Central Tax, dated 31 October 2025, notifying the Central Goods and Services Tax (Fourth Amendment) Rules, 2025 and inserting rules 9A and 14A with effect from 1 November 2025.
Recommendations of the 56th GST Council meeting, 3 September 2025, on rate rationalisation, given effect from 22 September 2025.
Central Board of Indirect Taxes and Customs, CBIC GST law repository, for the current text of the Acts, Rules and notifications cited above.
Goods and Services Tax Network, gst.gov.in, for FORM GST REG-01 and the registration, LUT and withdrawal workflows.
Disclaimer
This article is for educational and general business information purposes only and does not constitute professional legal, financial, or tax advice. GST thresholds, notifications, rules and forms change frequently, and whether a particular startup is required to register depends on its state, its entity type, what it supplies, who it supplies to and what it buys. Consult a qualified chartered accountant, GST practitioner or advocate before acting on any threshold, trigger, date or form set out here.
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