What Is Required For GST Registration: A 2026 CEO Guide

Key Takeaways

• Turnover threshold: ₹40 lakh for goods suppliers in normal states, ₹20 lakh for service providers in normal states
• Special category states (Manipur, Mizoram, Nagaland, Tripura): ₹20 lakh for goods, ₹10 lakh for services
• Mandatory regardless of turnover: inter state suppliers, e commerce sellers, casual taxable persons, non resident taxable persons, Input Service Distributors
• Application form: GST REG-01 on the GST portal
• Timeline: ARN issued within 3 working days of submission, GSTIN typically within 7 working days if no queries raised
• Penalty for non-registration: 10% of tax due, minimum ₹10,000, or 100% of tax due if deliberate evasion is established
• Aggregate turnover includes all supplies under one PAN across India, even exempt supplies, not just taxable turnover

Who Requires GST Registration — Threshold Limits And Mandatory Categories

The threshold limit for GST is not a single number. It depends on what you supply and where you operate.

For normal category states, the thresholds under Section 22 of the CGST Act are:

• ₹40 lakh: suppliers of goods
• ₹20 lakh: suppliers of services or mixed supplies, goods and services

For special category states (currently Manipur, Mizoram, Nagaland, and Tripura):

• ₹20 lakh: suppliers of goods
• ₹10 lakh: suppliers of services

One important definition to get right: aggregate turnover is not just your taxable revenue. It includes all supplies made under a single PAN across every state in India, taxable, exempt, and zero rated. A Delhi consulting firm billing ₹18 lakh in taxable services and receiving ₹3 lakh from an exempt service still has an aggregate turnover of ₹21 lakh and crosses the threshold.

Who Requires GST Registration Regardless Of Turnover

Section 24 of the CGST Act lists categories where registration is mandatory from the first rupee earned, no threshold applies:

• Inter state taxable suppliers, any business selling goods or services to a buyer in another state
• E commerce operators, platforms like Amazon or Flipkart that collect Tax Collected at Source (TCS) under Section 52
• Sellers on e commerce platforms, if you list products on Flipkart, Amazon, or Meesho, you must register regardless of turnover
• Casual taxable persons (CTP), businesses that occasionally supply in a state where they have no fixed place of business
• Non resident taxable persons (NRTP), foreign businesses supplying taxable goods or services in India
• Input Service Distributors (ISD), entities that receive invoices for services used across multiple branches and distribute the Input Tax Credit
• TDS deductors under Section 51, government departments, PSUs, and certain local authorities

One clarification worth noting: CBIC Notification No. 10/2017-IT provided a carve out for inter state service providers below the ₹20 lakh threshold in some contexts, verify current standing of this notification before relying on it, as GST notifications are periodically updated.

GST Registration Eligibility — What Kind Of Business Can Apply

Almost any entity engaged in economic activity can register for GST. That includes sole proprietors, partnership firms, LLPs, private limited companies, public companies, HUFs, trusts, societies, clubs, and non resident entities.

The legal test under the CGST Act is simple: if you are carrying on any trade, commerce, manufacture, profession, vocation, or supply of goods or services, you are eligible.

Composition Scheme Eligibility

If your turnover is below the mandatory threshold but you still choose to register, or if your turnover is just above it and you want a simpler compliance structure, the Composition Scheme under Section 10 is an option:

• Up to ₹1.5 crore turnover for goods suppliers (₹75 lakh for special category states)
• Up to ₹1.5 crore for restaurants
• Up to ₹50 lakh for service providers (under the 2018 CGST Amendment)
• Tax rates under composition: 1% for traders and manufacturers, 5% for restaurants, 6% for service providers
• Composition dealers cannot collect GST from customers or claim Input Tax Credit

Who Is Exempt From Registration

Not every business needs to register. Two categories are entirely exempt:

1. Persons dealing exclusively in fully exempt goods or services, for example, fresh fruits, vegetables, and certain unprocessed agricultural produce listed under Schedule I exemptions
2. Agriculturists supplying produce grown on their own land (defined under Section 2(7) of the CGST Act)

PAN Linkage And Multi State Registration

Every GSTIN is linked to a PAN. One PAN gets one GSTIN per state. If your business operates in Karnataka, Maharashtra, and Tamil Nadu, you need three separate GSTINs, all linked to the same PAN. A single PAN can hold up to 35 GSTINs across India's states and union territories.

Entities without a PAN, like non resident taxable persons or TDS deductors, can use alternative identification documents during registration.

Documents Required For GST Registration — Complete List By Entity Type

This is the section most people get stuck on. Here is the full GST registration requirements list, by entity type.

Common Documents For All Entity Types

• PAN card of the business or entity
• Aadhaar card of the proprietor, partner, director, or Karta, Aadhaar authentication is mandatory since August 2020, linked to Form GST REG-01
• Proof of principal place of business (see below)
• Bank account details, cancelled cheque, or first page of bank passbook, or bank statement showing entity name, account number, and IFSC code
• Photograph, passport size photo of the proprietor, partners, directors, or Karta
• Digital Signature Certificate (DSC) or Aadhaar based e Sign via OTP

Proof Of Business Address (Any One)

• Own premises: property tax receipt, electricity bill, or municipal khata copy
• Rented premises: rent or lease agreement, plus a utility bill in the landlord's name
• Shared or family member premises: a consent letter (No Objection Certificate) from the owner, plus the owner's utility bill
• SEZ units: certificate from the SEZ developer

All documents must be uploaded in JPEG or PDF format. File size limits typically range from 100 KB to 1 MB per document depending on the field.

Documents Required For GST By Entity Type

One thing many founders miss: for companies, LLPs, and partnership firms, the bank account must be in the entity's name, not in the personal name of a director or partner. This is one of the most common rejection triggers.

Voluntary GST Registration — When It Makes Sense Even Below The Threshold

Section 25(3) of the CGST Act explicitly permits voluntary registration even if your turnover is below the mandatory threshold. For many businesses, this is worth doing.

Reasons to register voluntarily:

• Input Tax Credit (ITC): If you are paying GST on office rent, software subscriptions, cloud infrastructure, or professional fees, you cannot recover that tax unless you are registered. A Bengaluru SaaS startup paying ₹18,000 in GST on ₹1 lakh of monthly cloud expenses loses that ₹18,000 permanently without registration.
• B2B supplier credibility: Larger corporates and MNCs cannot claim ITC on purchases made from unregistered vendors. Many will simply not onboard you as a supplier if you are unregistered.
• Exports: If you export goods or services, exports are zero rated under GST. To claim a refund of accumulated ITC on your inputs, or to file a Letter of Undertaking (LUT) so you do not collect GST from foreign clients, registration is mandatory.
• Fundraising and investor due diligence: GSTIN is increasingly expected in due diligence checklists for early stage funding rounds.

The trade off: Once registered, you must comply with all GST obligations, GSTR-1, GSTR-3B, GSTR-9, regardless of your actual revenue. That is a real cost in time or money.

Voluntary registrants must also remain registered for a minimum of one year before they can apply for cancellation under Rule 20 of the CGST Rules.

If you are a founder trying to model whether the ITC benefit actually outweighs the compliance cost at your current transaction volume, Virtual Accounting by AI Accountant can run those numbers for you before you commit.

How To Apply For GST Registration — Step By Step Process And Timeline

All GST registration applications are filed online. There is no physical submission. The process happens entirely on the GST portal.

Step By Step Application Process

Step 1: Go to gst.gov.in, Services, Registration, New Registration

Step 2 (Part A): Enter your PAN, mobile number, and email ID. Verify both with OTP. A Temporary Reference Number (TRN) is generated and sent to your registered email and mobile.

Important: The TRN is valid for only 15 days. If you do not complete Part B within this window, the TRN expires and you must restart the entire application.

Step 3 (Part B): Log in using the TRN. Fill in the complete application, business details, promoter and partner information, place of business, bank account details, HSN or SAC codes for your goods or services, and upload all required documents. Submit using DSC or Aadhaar based e Sign.

Step 4: An Application Reference Number (ARN) is issued within 3 working days of submission.

Step 5: The Proper Officer reviews the application. If no issues are found, your GSTIN is issued typically within 7 working days of the ARN.

Step 6 (if queries arise): The Proper Officer issues Form GST REG-03 seeking additional information. You must respond via Form GST REG-04 within 7 working days of receiving the notice. Missing this deadline results in rejection.

Step 7 (if rejected): Form GST REG-05 is issued with reasons. You can re apply after addressing the issues.

Understanding Your GSTIN

Your GSTIN is a 15 digit alphanumeric code:

• First 2 digits: state code, for example, 29 for Karnataka, 27 for Maharashtra
• Next 10 digits: your PAN
• 13th digit: entity number in that state, 1 for the first registration, 2 for the second, and so on
• 14th digit: Z by default
• 15th digit: a check digit

Your GST Registration Certificate (Form GST REG-06) must be displayed at your principal place of business.

Aadhaar Authentication

Since August 2020, if you opt for Aadhaar authentication during registration, processing is significantly faster, approval within 3 working days is the norm. If you skip Aadhaar authentication, the application may be routed for physical verification, which takes longer.

Casual Taxable Persons: Special Rules

If you are a Bengaluru based brand setting up a pop up stall at a trade fair in Delhi, you qualify as a Casual Taxable Person (CTP). Rules:

• Apply at least 5 days before you commence business in that state
• Registration is valid for 90 days and is extendable
• You must deposit an advance equal to your estimated tax liability for the registration period at the time of application

GST Registration Requirements List — Key Compliance After You Get Your GSTIN

Getting registered is step one. What follows is a set of standing obligations that begin immediately.

Display your registration certificate. Rule 18 of the CGST Rules requires you to display the GST registration certificate at your principal place of business. Non compliance attracts a penalty.

Issue GST compliant tax invoices from the date of registration under Section 31. You cannot retroactively issue compliant invoices for a period before your registration date.

Return Filing Schedule (Regular Taxpayer, FY 2026 27)

E Invoicing

If your aggregate turnover in any preceding financial year exceeded ₹5 crore, e invoicing is mandatory. Every invoice must generate an Invoice Reference Number (IRN) through an Invoice Registration Portal (IRP) before it is issued to the buyer.

ITC Matching And Vendor Compliance

Input Tax Credit is available only on invoices that appear in your GSTR-2B. If a vendor files their GSTR-1 late or incorrectly, your ITC claim is at risk. Keep a regular check on vendor compliance, this matters from your very first month as a registered taxpayer.

Penalties For Late Filing

• Regular returns: ₹50 per day (₹25 CGST + ₹25 SGST)
• Nil returns: ₹20 per day
• Late fees are capped per return type, but they add up fast across multiple returns

Cancellation

If your turnover drops below the threshold, you can apply for cancellation in Form GST REG-16. A Proper Officer can also cancel your registration suo motu if you fail to file returns for 6 consecutive months (regular taxpayer) or 3 consecutive quarters (composition taxpayer).

Common Mistakes That Delay Or Reject GST Registration

• Wrong PAN category selected. The PAN type in your application must match your entity type exactly. An LLP's PAN is categorised differently from a company's PAN. A mismatch triggers an immediate flag.
• Address proof mismatch. The name or address on your utility bill does not match what you entered in the application. This is the single most common rejection reason. If your office lease is in the company's name but the electricity bill is still in the landlord's personal name, attach both documents and a rent agreement.
• Bank account in a personal name. For companies, LLPs, and partnership firms, the bank account used in the registration must be in the entity's name. A director's personal savings account will not be accepted.
• Aadhaar PAN name or date of birth mismatch. If the name or date of birth on your Aadhaar does not match PAN records, Aadhaar authentication will fail. This must be corrected directly with UIDAI before you can proceed.
• Incorrect HSN or SAC codes. Using the wrong commodity or service code does not cause immediate rejection but creates downstream compliance problems, wrong tax rates, mismatched e invoices, and ITC disputes. As of current rules: 4 digit HSN is mandatory for turnover between ₹1.5 crore and ₹5 crore, 6 digit HSN is required above ₹5 crore, services use SAC codes.
• Incomplete Board Resolution for companies. The Board Resolution authorising the signing authority must match MCA records. An unsigned resolution, an outdated one, or one that names a director no longer on the MCA register will be flagged.
• Incorrect NOC format for shared premises. If your office belongs to a family member or a co tenant, you need a consent letter on plain paper, signed by the owner, with their utility bill attached. A WhatsApp message or verbal confirmation will not work.
• TRN expiry. The TRN generated in Part A is valid for only 15 days. If you collect all documents and return on Day 16, you restart from zero.

GST Registration For Special Cases — E Commerce, Startups, And Multiple States

E Commerce Sellers

If you sell on Amazon, Flipkart, Meesho, or any other marketplace, GST registration is mandatory under Section 24(ix), regardless of whether your turnover is ₹1 or ₹1 crore. The e commerce operator collects TCS at 1% (0.5% CGST and 0.5% SGST or IGST) on the net value of your taxable supplies. This TCS appears in your GSTR-2B each month and can be claimed as a credit against your output tax liability.

Startups With No Revenue Yet

You can register for GST before your first invoice. If you are a Mumbai D2C brand in pre launch mode but already paying GST on packaging vendors, design agencies, and warehousing, registering early means that GST paid on inputs accumulates as ITC and offsets your future liability. Prospective registration is explicitly permitted.

Multiple State Operations

If your business has offices, warehouses, or agents in multiple states, you need a separate GSTIN for each state. A Delhi consulting firm with a branch office in Hyderabad needs two GSTINs. Section 2(85) of the CGST Act defines place of business broadly, it includes warehouses, branches, and even an agent's premises.

One PAN can support up to 35 GSTINs. All are linked by PAN and aggregate turnover is calculated across all of them.

IT And Service Businesses Exporting To Foreign Clients

If your Bengaluru SaaS company is invoicing clients in the US or UK, those supplies are exports and are zero rated under GST. You need a GSTIN to file a Letter of Undertaking (LUT), Form RFD-11, filed annually on the GST portal before the start of the financial year, so you can export without collecting GST from your foreign clients and without posting a bond. Without LUT, you would need to either collect GST, which no foreign client wants, or pay it out of pocket and claim a refund.

FAQ

What Is The Current Turnover Threshold For GST Registration In 2026?

₹40 lakh for goods suppliers and ₹20 lakh for service providers in normal category states. For special category states, Manipur, Mizoram, Nagaland, Tripura, the thresholds are ₹20 lakh for goods and ₹10 lakh for services.

Is GST Registration Mandatory For A Business Selling Only Within One State?

Not if your turnover is below the applicable threshold and your supplies are not in a mandatory category. Once you cross the threshold, or if you start selling inter state, registration becomes mandatory.

Can I Register For GST Before My Business Starts Earning Revenue?

Yes. Section 25(3) of the CGST Act allows prospective voluntary registration before your first supply. This is particularly useful if you are incurring GST on setup costs and want to claim ITC. If you want a done for you application with document readiness, portal filing, and Aadhaar e sign, Virtual Accounting by AI Accountant can handle it end to end.

What Documents Do I Need If I Am A Sole Proprietor Registering For GST?

Your personal PAN, Aadhaar, a passport size photograph, proof of your business address, bank account details in the business name or your name, and any two of: bank statement, electricity bill, ITR, or MSME certificate.

How Long Does GST Registration Take?

An ARN is issued within 3 working days of submission. GSTIN is typically issued within 7 working days if no queries are raised. If you receive a Form GST REG-03 query notice, you have 7 working days to respond, which extends the overall timeline.

What Happens If I Do Not Register For GST When I Am Required To?

The penalty is 10% of the tax due, with a minimum of ₹10,000. In cases of deliberate evasion, the penalty rises to 100% of the tax due. You may also face liability for past tax with interest and potential seizure during enforcement.

Do I Need Separate GST Registrations For Each State I Operate In?

Yes. GST registration is state specific. If you have a place of business in multiple states, including warehouses and branches, you need a separate GSTIN for each state. For multi state onboarding, documentation, and monthly compliance across GSTINs, Virtual Accounting by AI Accountant can centralise the workflow for your finance team.

What Is The Difference Between A Casual Taxable Person And A Regular Registered Taxpayer?

A Casual Taxable Person, CTP, has no fixed establishment in a state but makes taxable supplies there temporarily, such as at a trade fair. CTP registration is valid for 90 days, requires advance tax payment equal to estimated liability, and must be obtained at least 5 days before commencing business in that state. A regular taxpayer has an ongoing place of business and files returns on the normal cycle.

Can An E Commerce Seller Below ₹20 Lakh Turnover Avoid GST Registration?

No. E commerce sellers are in the mandatory registration category under Section 24 of the CGST Act. Turnover thresholds do not apply to them.

What Is Aggregate Turnover And Why Does It Matter For GST Registration?

Aggregate turnover is the total value of all supplies under one PAN across India, including taxable supplies, exempt supplies, exports, and inter state supplies. It is the figure used to determine whether you cross the registration threshold, so even businesses with modest taxable revenue can become liable to register once exempt supplies are counted.