GST registration in India — the 2026 playbook for new businesses

Direct answer

GST registration in India in 2026 is required for any business with aggregate turnover above ₹40 lakh (goods) or ₹20 lakh (services), any inter-state supplier, any e-commerce operator, and any casual or non-resident taxable person — and the standard approval path takes 3–7 working days via the GSTN portal with all documents in order.

Key takeaways

• GST registration is mandatory for inter-state supply, e-commerce, and turnover above ₹40 lakh (goods) / ₹20 lakh (services).
• Approval typically takes 3–7 working days with all documents in order; Aadhaar-based e-sign is the standard filing path.
• E-invoicing is now mandatory for businesses with ₹5 crore+ aggregate turnover since April 2025.
• Penalties for non-registration are the higher of ₹10,000 or the tax amount due, plus loss of input tax credit.
• Common rejection reasons: address proof mismatch, signatory Aadhaar not linked to mobile, bank account name mismatch.

Main content

If you are starting a business in India in 2026 — whether it’s a private limited company, an LLP, a partnership firm, or a sole proprietorship — GST registration is one of the first compliance steps. The rules changed multiple times between 2017 and 2026; here is the operating playbook that reflects the current state.

Who needs to register

Per Section 22 of the CGST Act, GST registration is mandatory when any of the following apply:

• Aggregate turnover exceeds ₹40 lakh in a financial year for supply of goods (₹20 lakh for services). For special category states (Manipur, Mizoram, Nagaland, Tripura, Meghalaya, Sikkim, Arunachal Pradesh, Uttarakhand, Himachal Pradesh), the threshold is ₹10 lakh for both goods and services.
• You make any inter-state supply, regardless of turnover.
• You operate as an e-commerce seller or aggregator.
• You are a casual taxable person (occasional supplier without fixed place of business).
• You are a non-resident taxable person.
• You are required to deduct or collect tax at source (TDS/TCS).

A common 2026 mistake: assuming the threshold protects you if you only sell B2B. It does not. Any inter-state supply — even a single transaction — triggers mandatory registration.

The 2026 filing path

The standard path is online via the GSTN portal at gst.gov.in. The steps:

1. Generate a GSTIN-enabling temporary ID by verifying your mobile number and email.
2. Fill Part A of the application (PAN, business name, constitution, principal place of business, authorised signatory details).
3. Verify Aadhaar of the authorised signatory via OTP — this replaces the older physical Aadhaar upload for most cases.
4. Fill Part B with business details, promoter/director details, bank account, and primary business activity (HSN/SAC codes).
5. Upload documents — incorporation certificate for companies/LLPs, partnership deed for partnerships, address proof (rent agreement + electricity bill / property tax receipt), cancelled cheque or bank statement, and photographs of promoters.
6. Sign with DSC or Aadhaar e-sign.
7. Await approval — typically 3–7 working days for clean applications.

If your application raises a query (verification notice), you have 7 working days to respond. Cases that go through query resolution can take 15–30 days.

Documents you actually need

The GSTN portal asks for a lot. Here is what is actually required for a private limited company or LLP:

• PAN of the entity
• Aadhaar of the authorised signatory (linked to mobile number)
• Incorporation certificate
• MOA + AOA / LLP agreement
• Address proof of registered office (rent agreement + electricity bill less than 2 months old, or property tax receipt, or property ownership document)
• Cancelled cheque or latest bank statement showing the entity name, IFSC, and account number
• Photographs of all directors / partners / proprietor
• Board resolution authorising the signatory (for companies)

For a proprietorship, you additionally need the proprietor’s PAN and Aadhaar.

Common rejection reasons

Per our internal data from filing GST registrations for SMB clients across Gujarat, Maharashtra, and Karnataka, the top five rejection reasons in 2025–2026 are:

1. Address proof mismatch — the electricity bill name does not match the entity name on PAN. Solution: get the electricity bill reissued in the entity name, or attach a No Objection Certificate from the property owner.
2. Aadhaar mobile mismatch — the signatory’s Aadhaar is linked to a different mobile number than the one used in the application. Solution: update the mobile in Aadhaar at the nearest enrolment centre.
3. Bank account name mismatch — the cancelled cheque shows a name slightly different from PAN. Solution: get a fresh cheque leaf with the exact PAN name, or attach a bank letter confirming the entity operates the account.
4. Incomplete HSN/SAC codes — the portal now requires at least 4-digit HSN codes for goods and SAC codes for services. Solution: list all primary products/services and their codes before starting the application.
5. Signatory not authorised — for LLPs and companies, the signatory on the portal must match the resolution or partner list. Solution: upload the resolution document and ensure the signatory matches.

E-invoicing mandate

Per CBIC Notification 13/2020 and subsequent amendments, e-invoicing is mandatory for businesses with aggregate turnover of ₹5 crore or more from April 2025. This was reduced from the earlier ₹10 crore threshold. If you cross ₹5 crore aggregate turnover during the year, e-invoicing kicks in from the start of the next month.

The operational impact: every B2B invoice must be generated via a GSTN-registered Invoice Registration Portal (IRP) and carry an IRN (Invoice Reference Number). The integration typically goes through your billing software (Tally, Zoho Books, or similar) via API.

Penalties for non-registration

Per Section 122 of the CGST Act, the penalty for failure to register is the higher of ₹10,000 or the tax amount due. Additionally:

• Input tax credit (ITC) cannot be claimed by your buyers on unregistered supplies — which destroys your B2B value proposition.
• The department may issue a show-cause notice and, after hearing, pass an order for registration with back-dated liability.
• Repeat non-registration can attract prosecution under Section 132 in egregious cases (₹1 crore+ tax evasion).

When to register a startup vs. wait

If you are a pre-revenue startup with no commercial activity, you do not yet need GST registration. But:

• If you are raising capital and will issue invoices for any service — register.
• If you are selling through Amazon/Flipkart/Meesho — register immediately (the platforms require it).
• If you are doing B2B SaaS with even one paying customer — register (most enterprise customers require GSTIN on invoices for their ITC).
• If you are building a product with a 12+ month runway before revenue — you can defer, but build the application into your pre-launch checklist.

FAQ

Who needs GST registration in India in 2026?

Any business with aggregate turnover above the state-wise threshold (₹40 lakh for goods, ₹20 lakh for services, ₹10 lakh for special category states), any inter-state supplier regardless of turnover, any e-commerce operator, any casual taxable person, and any non-resident taxable person.

How long does GST registration take in 2026?

For straightforward cases with all documents in order, GST registration is typically approved within 3–7 working days via the GSTN portal, per CBIC guidance. Cases with verification queries can take 15–30 days.

What documents are required for GST registration?

PAN of the entity, Aadhaar of the authorised signatory, photo of the proprietor/partners/directors, business address proof (rent agreement + electricity bill or property tax receipt), bank account statement or cancelled cheque, and incorporation certificate for companies and LLPs.

What is the penalty for not registering under GST when required?

Penalty under Section 122 of the CGST Act is the higher of ₹10,000 or the tax amount due. Additionally, the assessee loses input tax credit and may face registration cancellation for fraudulent non-registration.

Has the e-invoicing threshold changed in 2026?

Per CBIC notification 13/2020 and subsequent amendments, the e-invoicing threshold was reduced to ₹5 crore aggregate turnover from April 2025 onwards. Businesses crossing this threshold must generate e-invoices via the IRP.

Sources

1. CGST Act, Section 22 — Persons liable for registration
2. CBIC Notification 13/2020 — E-invoicing mandate
3. GSTN portal — New registration