What’s included, and what’s not

GST registration in Chennai — at a glance

See what’s included first, then choose the registration route that matches your business.

Starting professional fee

₹1,000

For the eligibility review, document review and preparation of your GST application.

Business and turnover review
Taxpayer-type confirmation
A document checklist for your business type, reviewed before filing
Online preparation of your GST application, confirmed with you first

Start with a consultant

Important scope note

Government approval time is separate

The one-working-day estimate applies after complete and valid documents are received. Aadhaar authentication, officer queries and portal processing can change the final approval time.

No surprise work: inclusions, exclusions and any additional charges are agreed with you before we proceed.

Route 1

Normal GST registration

Best when the business needs flexibility, may exceed the Rule 14A B2B output-tax limit, needs another registration in the State, or cannot complete the required authentication.

If an application query is raised, see GST registration query replies.

Route 2 · Optional

Rule 14A simplified registration

May suit an eligible small taxpayer whose monthly output tax on B2B supplies is expected to remain within ₹2.5 lakh and who can meet the Aadhaar and portal conditions.

For approval-route conditions, see fast-track GST registration.

Documents to keep ready

Documents required for GST registration in Chennai

Select the relevant tab below. These records help us review your gst registration requirement; additional evidence may be needed for your circumstances.

01

Proprietorship

Prepare proprietorship identity, business and authorised-signatory records for GST registration.

Proprietor PAN and Aadhaar details

Recent passport-size photograph

Proprietor email address and mobile number

Business name, email and mobile number

Goods or services supplied

Business-address evidence and owner consent, as applicable

Business address proof: a rental agreement, lease agreement or sale deed in the applicant’s or business’s name, with the latest electricity (EB) bill.

Additional documents: the final checklist is tailored to your case, so you only prepare what’s actually needed.

Eligibility and taxpayer type

Is GST registration required for your business?

Turnover generally means aggregate turnover including exempted and taxable turnover linked to the same PAN across India. For Some business activities specifically mentioned, Register GST number even below the turnover limits.

Goods: Register if Sales crosses above ₹40 lakh in Tamil NaduExample: a Tamil Nadu trader selling only goods crosses the usual threshold.

Taxable services: Register if Value of services provided exceeds ₹20 lakhExample: A event Management company turnover is crossing Rs.20 Lakh.

TAKES ABOUT 30 SECONDS

Required, voluntary or not required?

Answer three simple questions to see the likely position. Confirm the facts before relying on the result.

Checks the usual turnover threshold

Checks mandatory-registration situations

Separates voluntary registration from no present requirement

Has your turnover crossed the usual limit for your supply type?

Result

Confirm with a consultant

Your situation	Likely position	Registration type	Next step
Turnover crosses the applicable threshold	Registration generally required	Regular taxpayer	Confirm turnover and apply within the prescribed time.
Turnover is below the threshold, but registration helps B2B trade	Voluntary option	Regular taxpayer	Compare input-tax-credit benefits with return-filing duties.
Business falls under a mandatory-registration category	May be required	Type depends on activity	Check e-commerce, TDS/TCS, ISD, SEZ or non-resident rules.
Below the threshold, no mandatory category and no voluntary need	May not be required now	No registration at present	Monitor turnover and changes in business activity.

Choose the suitable application route

Normal GST registration or Rule 14A?

Rule 14A is optional. Follow the if/else path and use normal registration if any required condition is not met.

Normal registration

Best when flexibility matters

No Rule 14A B2B output-tax ceiling
Suitable when another State registration is needed
Use when mandatory Aadhaar conditions cannot be completed
Officer or portal processing time can vary

Rule 14A simplified route

Best for an eligible small taxpayer

Monthly output tax on B2B supplies expected at ₹2.5 lakh or less
Required Aadhaar authentication can be completed
Only one Rule 14A registration for the PAN in the State
Auto Approval within three working days after ARN, subject to conditions

Will monthly output tax on B2B supplies stay at ₹2.5 lakh or less?

If yes: continue. If no: choose normal registration.

Can the required Aadhaar authentication be completed?

If yes: continue. If no: choose normal registration.

Is this the only Rule 14A registration for this PAN in the State?

If yes: Rule 14A may suit. If no: choose normal registration.

All answers are Yes

Rule 14A may be suitable, subject to authentication, ARN generation and portal conditions.

Any answer is No

Normal registration is the clearer route and offers greater operating flexibility.

18% illustration: At 18%, ₹2.5 lakh of output tax is approximately ₹13.9 lakh of monthly taxable B2B supplies of monthly taxable B2B supplies, assuming all relevant supplies are taxed at 18%. Actual eligibility depends on output tax across applicable rates—not turnover alone.

Withdrawal: for withdrawal applications filed on or after 1 April 2026, all due returns must be filed and at least one GSTR-3B and GSTR-1 must have been filed. No amendment or cancellation application should be pending. Ask our GST consultant to guide the portal withdrawal and approval steps.

Why this is worth doing properly

Benefits of GST registration

Done properly, you’re left with the right outcome and clean records you can use for the next step.

A verifiable GSTIN

Show a registered identity on your invoices that customers can check.

Collect GST correctly

Charge GST on taxable sales where the law requires it.

Claim eligible input tax credit

Recover eligible GST paid on business purchases, subject to the conditions.

Work with B2B customers

Meet the invoicing and vendor-onboarding requirements of larger businesses.

Support growth

Enables interstate supplies, exports and imports where applicable; some separate requirements may still apply.

Five clear stages

How we complete GST registration — five clear stages

1

Eligibility and route review

We review your business activity, turnover and State to assess registration requirements and whether the normal or Rule 14A route is appropriate.

2

Document check

We check PAN, entity records, business-address evidence and signatory details, and give you a clear list of anything missing.

3

Online application

We enter the business and applicant details on the GST portal, share them for your confirmation and submit the application with supporting documents.

4

Authentication and tracking

You complete the applicable authentication or verification. We track the application reference and assist with document queries within the agreed scope.

5

Certificate and next steps

After approval, we share the registration certificate and explain the immediate actions for bank details, invoices, record keeping and return filing.

Keep the process smooth

Before and after GST registration

Before applying

Confirm liability, taxpayer type and State of registration
Check the legal name and PAN against entity records
Verify premises evidence and signatory authorization
Keep the applicant available for portal authentication

The documents guide explains GST registration documents.

After registration

Check the registration certificate and effective date
Set up compliant invoices and required certificate display
Provide bank details and other post-registration information as required
Track return filing, payments and changes needing amendment

Common filing calendar

GST return due dates and late charges

We will inform the appliable GST filing due dates and other compliances required after the GST registration is approved.

Return	Who usually files	Usual due date	Purpose
GSTR-1 monthly	Monthly regular filers	11th of the next month	Outward-supply details
GSTR-3B monthly	Monthly regular filers	20th of the next month	Summary return and tax payment
GSTR-1 under QRMP	Eligible quarterly filers	13th after the quarter	Quarterly outward-supply details
GSTR-3B under QRMP	Eligible quarterly filers	22nd or 24th after the quarter	Quarterly summary and payment
CMP-08	Composition taxpayers	18th after each quarter	Quarterly payment statement
GSTR-4 annual	Composition taxpayers	30 April after the financial year	Annual composition return
GSTR-9 / 9C	Taxpayers to whom applicable	31 December after the financial year	Annual return and reconciliation

Late fee: delayed GSTR-3B commonly attracts ₹50 per day, or ₹20 per day for a nil return, subject to notified limits, reductions or waivers.

Interest: delayed tax payment can attract interest at the notified rate, generally 18% per year, from the day after the payment due date.

Questions people ask us most

GST registration FAQs

When should I apply after becoming liable?

Apply within the prescribed period—generally 30 days from becoming liable due to mandatory condition or crossing the turnover. For example if your current turnover is Rs.39.75 Lakhs and you are going to bill for another 50 thousand to your customer, then within 30 days from the date of billing or receiving advance crossing 20 lakhs u should apply for GST registration.

Can I register voluntarily below the turnover limit?

Yes, where permitted. Compare B2B and input-tax-credit benefits with the ongoing return-filing and record-keeping duties. Once registered you will be treated as regular dealer and GST should be charges on sales.

Is Aadhaar authentication required for Rule 14A?

Yes, The primary authorized signatory and at least one director or partner must complete the applicable authentication.

What if the officer asks for more documents?

Reply within 7 working days with clear documents and an explanation, and officer will approve or reject the GST application within 7 working days after submitting the response to show cause notice.

Must I file returns when there are no sales?

Yes. File the NIL returns on time even where there is no sales in the period. Continuous defaults in filing GST returns may trigger GST number suspension followed by the show cause notice for suo-moto cancellation of GST registration by the GST department.

Can one GST registration cover business locations in different States?

GST registration is State-specific. Registration may be needed in each State from which taxable supplies are made, based on the facts and applicable rules. If you are making only exempted supply in some states then GST registration is not required in that specific state.

Time required for GST registration approval in normal mode ?

Aadhaar authenticated Normal GST registration application will be checked by the GST officer with in 7 working days and GST number will be approved if the officer is satisfied with the documents submitted. Else Query will be raised through GST registration Show cause notice requiring additional information and documents.

Time required for GST registration Auto approval under Rule 14A?

Now small dealers are given benefit of quick GST registration approval if they have opted as small dealer whose tax liability is up to rupees 2.5 lakhs per month. Once application is auto verified and ARN is generated the GST registration number will be approved in less than 3 days. As per our experience GST number will be allotted in 1-2 hours immediately after Aadhaar authentication.

What will happen if Aadhaar authentication is not successful ?

For normal GST registration application, If Aadhaar authentication is not successful Physical verification will be assigned and department has 30 days to complete the physical verification and respond to the GST application.

For Rule 14A Fast Track GST registration application the application will not be further processed by the system.

Official references: GST Portal · GST Council Rule 14A update · CBIC registration rules. Rules, thresholds, return dates and portal conditions can change; confirm the current position before filing.

Content reviewed: August 2026.

GST registration in Chennai, with the right route for your business