GST Registration for Small Businesses: Limits, Documents and Steps

Most Indian small businesses need GST registration once their annual turnover crosses Rs 40 lakh (for goods) or Rs 20 lakh (for services), with lower limits in a few states, and some businesses must register from day one whatever their turnover. This guide explains the thresholds, the compulsory cases, the documents you need, the step-by-step process on the GST portal, the faster Rule 14A route, and whether the composition scheme is right for you. Registration on the official portal is free.

Do you need GST registration? The turnover thresholds

GST registration becomes mandatory when your aggregate turnover in a financial year crosses the threshold for your state and type of business. Aggregate turnover is calculated on your PAN across India. It includes taxable, exempt and export supplies and inter-state supplies, but excludes the GST itself.

Type of business	Most states	Special category states
Exclusively supplying goods	Rs 40 lakh	Rs 20 lakh in some (such as Telangana and Puducherry); Rs 10 lakh in Manipur, Mizoram, Nagaland and Tripura
Supplying services, or both goods and services	Rs 20 lakh	Rs 10 lakh in Manipur, Mizoram, Nagaland and Tripura

The higher Rs 40 lakh limit, in force since 1 April 2019, applies only if you supply goods exclusively. The moment you also provide a taxable service, even a small one, the Rs 20 lakh limit applies to you. Sources also differ slightly on which smaller states chose the Rs 20 lakh goods limit, so if you operate in the North-East, Uttarakhand, Telangana or Puducherry, confirm the current limit with your state GST department or a tax professional.

Here is a quick illustrative example. A saree shop in Surat that only sells goods and has Rs 32 lakh in annual sales does not have to register. A beauty salon in Jaipur that crosses Rs 20 lakh in service income must. A boutique in Lucknow that sells clothes and also charges for stitching is a mixed supplier, so its limit is Rs 20 lakh.

When you must register whatever your turnover

Section 24 of the CGST Act lists categories that must register even at zero turnover. The ones that affect small businesses most are:

• Inter-state supply of goods. If you ship goods from Gujarat to a customer in Maharashtra, you generally need GST registration. (Service providers making inter-state supplies below the threshold have an exemption.)
• Selling through e-commerce operators that are required to collect tax at source, such as the big marketplaces. Rules for small intra-state sellers on e-commerce platforms have been relaxed in recent years, so check the current position with the platform and your CA.
• Casual taxable persons, for example a Jaipur handicraft seller who takes a stall at a Diwali exhibition in Bengaluru.
• Persons liable to pay tax under reverse charge.
• Non-resident taxable persons, input service distributors, agents supplying on behalf of others, and TDS/TCS deductors.

You can also register voluntarily below the threshold. This often makes sense if your customers are GST-registered businesses who want to claim input tax credit on your invoices, or if you plan to sell online nationally.

Documents you need for GST registration

The GST portal accepts scanned documents in PDF or JPEG, with small file size limits (photographs up to 100 KB, most documents up to 1-2 MB). Collect these first:

Business type	Key documents
Proprietorship	PAN and Aadhaar of the proprietor, photograph, address proof of the business premises, bank account details
Partnership firm or LLP	PAN of the firm, partnership deed or LLP agreement, PAN, Aadhaar and photos of partners, authorised signatory proof, premises proof
Private limited company	PAN of the company, Certificate of Incorporation, PAN, Aadhaar and photos of directors, board resolution appointing the authorised signatory, premises proof

Proof of principal place of business is where most applications get stuck. You need one of: a property tax receipt, municipal khata, or electricity bill for owned premises; a rent or lease agreement plus the owner’s electricity bill for rented premises; or a consent letter with the owner’s ID and a utility bill if you work from a relative’s property. Make sure the address on the proof matches the address you type, word for word.

Step-by-step: new GST registration on the portal

The process below follows the official GST portal user guide for normal taxpayers. Everything is done on gst.gov.in. No government fee is charged.

Part A: get your TRN

1. Go to Services, then Registration, then New Registration.
2. Select “Taxpayer” as the type, and choose your state and district.
3. Enter the legal name of the business exactly as it appears on PAN, then PAN, email and mobile number.
4. Verify the two OTPs sent to the mobile and email. Each is valid for 10 minutes.
5. The portal generates a Temporary Reference Number (TRN). Note it down.

Part B: complete the application within 15 days

Log in again with the TRN and fill the tabs in order:

1. Business details: trade name, constitution, date of commencement, date on which you became liable to register, and whether you want to opt for composition.
2. Promoters or partners: details, photographs and identity of each.
3. Authorised signatory: the person who will sign returns, with proof of appointment.
4. Authorised representative: optional, for example your GST practitioner.
5. Principal place of business: address, contact, nature of possession and the proof document.
6. Additional places of business: godowns, branches in the same state.
7. Goods and services: up to five HSN codes for goods and five SAC codes for services. Pick the ones for your main products.
8. State-specific information: professional tax or state excise details if applicable.
9. Aadhaar authentication: choose OTP or biometric authentication.
10. Verification: sign with DSC (compulsory for companies and LLPs), e-Signature or EVC.

On submission you get an Application Reference Number (ARN) by email and SMS. Track progress under Services, Registration, Track Application Status.

Aadhaar authentication: do not skip it

If you opt for Aadhaar OTP authentication, links are sent to the promoters and authorised signatory, and each must complete it. If you are asked for biometric authentication instead, you must visit a designated GST Suvidha Kendra within the time allowed. Applications without authentication face more checks and delays.

After approval

Once the officer approves the application, you can download the registration certificate (Form GST REG-06) from the portal and receive your 15-digit GSTIN. Display the certificate at your place of business and print the GSTIN on your name board and invoices. If the officer raises a query, it arrives as a notice on the portal; reply with documents within the time given or the application can be rejected.

The Rule 14A fast track for small B2B suppliers

Since 1 November 2025, Rule 14A of the CGST Rules offers a simplified registration option. It is meant for low-risk small taxpayers whose total output tax on supplies to registered persons does not exceed Rs 2.5 lakh a month. This is the combined CGST, SGST, IGST and cess figure, not Rs 2.5 lakh for each.

• Registration is granted electronically within three working days after successful Aadhaar authentication.
• You can hold only one registration per state under the same PAN under this route.
• If your monthly B2B output tax later exceeds the limit, you must apply to withdraw from the scheme (Form GST REG-32) and move to normal registration.

For a small wholesaler or a freelancer billing a few businesses, this route can save a week or two. As it is new, check the latest conditions on the GST portal or with a CA before you choose it.

Composition scheme: should you opt in?

The composition scheme lets small taxpayers pay GST at a flat low rate on turnover and file fewer, simpler returns. Here is how it compares to regular registration.

Point	Regular GST	Composition scheme
Turnover limit	No upper limit	Rs 1.5 crore for most goods businesses (Rs 75 lakh in special category states); Rs 50 lakh for service providers
Tax rate	As per product or service rate	Typically 1% for manufacturers and traders, 5% for restaurants, 6% for service providers
Input tax credit	Available	Not available
Collect GST from customers	Yes, on tax invoice	No; you issue a bill of supply and pay tax yourself
Inter-state outward supply	Allowed	Not allowed
Returns	Monthly or quarterly returns	Quarterly statement (CMP-08) and an annual return (GSTR-4)

Who should choose composition

Composition suits a business that sells mostly to end consumers within one state, has thin paperwork capacity, and does not need input tax credit. A neighbourhood sweet shop, a small restaurant, or a local hardware store are typical fits.

Who should stay regular

Stay with regular GST if your buyers are businesses (they cannot claim credit on a bill of supply), if you sell to other states or plan to, or if you buy a lot of taxed inputs and want the credit. For example, a small packaging supplier selling to FMCG companies would lose customers under composition.

Mistakes that delay or complicate registration

• Name mismatch with PAN. Use the legal name exactly as on PAN in Part A.
• Weak address proof. A rent agreement without the owner’s utility bill, or an unsigned consent letter, is a common reason for queries.
• Wrong “date of liability”. If you crossed the threshold months ago, give the real date. You are expected to apply within 30 days of becoming liable, and understating it can create tax and interest problems later.
• Picking random HSN codes. Choose codes that match your real products; they affect your rates and invoices.
• Using a consultant’s email and phone. Give contact details that belong to the business. You will need OTPs for every return.
• Forgetting returns after registration. Once registered, you must file returns even for months with no sales. Nil returns missed for months lead to late fees and can lead to cancellation.

Your first 30 days after getting a GSTIN

1. Update your invoice template: GSTIN, HSN or SAC codes, tax rate, and place of supply.
2. Note your return due dates in a calendar or accounting app.
3. Link your GSTIN with your bank account and update it on marketplaces and payment gateways.
4. Add the GSTIN to your Udyam registration if you have one.
5. Check the current rate for each product. GST rates were rationalised in September 2025, so older price lists may show outdated rates.

Frequently Asked Questions

What is the GST registration limit for small businesses in 2026?

For most states it is Rs 40 lakh of aggregate turnover for businesses supplying only goods and Rs 20 lakh for services or mixed supplies. Manipur, Mizoram, Nagaland and Tripura have a Rs 10 lakh limit, and some states kept Rs 20 lakh for goods. Confirm with your state GST department.

Is there a fee for GST registration?

No. There is no government fee for registration on gst.gov.in. You pay only if you hire a professional to file it for you.

How long does GST registration take?

If documents are in order and Aadhaar authentication is done, registration is usually approved within about a week. If the officer asks for physical verification or raises a query, it takes longer. The Rule 14A route promises approval within three working days for eligible small B2B suppliers.

Can I register for GST from home?

Yes. You can use your residential address as the principal place of business with ownership proof, or a rent agreement or consent letter with the owner’s utility bill.

Do I need GST to sell on Amazon or Flipkart?

Traditionally, sellers on marketplaces that collect tax at source had to register regardless of turnover. The rules for small intra-state sellers have been eased in recent years, so check the marketplace’s current seller requirements and speak to a CA.

Can I switch from composition to regular GST later?

Yes. You can opt out by filing the prescribed form on the portal, and you must move out automatically if your turnover crosses the composition limit.

Register once, then stay compliant

Work out your aggregate turnover honestly, check whether any compulsory registration rule applies to you, collect a clean address proof, and file on gst.gov.in in one sitting. GST rules, rates and limits change through notifications and GST Council decisions, so check the official portal or a qualified tax professional before you rely on any figure in this guide.