GST Registration in Chennai — CA-Verified, 24-Hour Filing

GST registration documents for Chennai businesses: (1) PAN card of business owner/Pvt Ltd company (mandatory); (2) Aadhar card with mobile-linked OTP — Aadhar authentication is mandatory on GSTN portal, ensure your Aadhar is linked to your current mobile number before applying; (3) Proof of principal place of business in Chennai — TNEB (Tamil Nadu Electricity Board) electricity bill or Bescom bill or latest property tax receipt from Greater Chennai Corporation; if rented, include NOC from property owner on ₹20 stamp paper and rent agreement; (4) Bank account proof — cancelled cheque or bank statement not older than 3 months, first page of passbook; (5) Photograph of applicant (JPG, less than 100KB); (6) PAN of Pvt Ltd company separately from director PAN. Process: (1) Create GST portal login at gstn.gov.in; (2) Fill Part A (PAN + mobile + email for OTP) — get TRN (Temporary Reference Number); (3) Fill Part B (all 10 sections including business details, HSN/SAC codes, bank details, authorized signatory) within 15 days of TRN; (4) Submit with Aadhar OTP or DSC; (5) ARN (Application Reference Number) generated immediately; (6) GST officer may raise query within 7 working days; (7) GSTIN issued within 3–7 working days if no query. LegalKarobar.com files GST applications same day — documents received before 2 PM are submitted by 5 PM.

Chennai IT companies on OMR (Old Mahabalipuram Road), Sholinganallur, Perungudi, and Tidel Park have specific GST compliance: (1) Mandatory GST registration regardless of turnover — any IT company making interstate supply (software export to foreign clients) must register for GST; (2) LUT (Letter of Undertaking) filing — Chennai IT software exporters must file Form GST RFD-11 (LUT) before the start of each financial year to supply services without paying IGST; LUT filing on GST portal is free and must be renewed by April 1st each year; (3) GSTR-1 must correctly report zero-rated export supplies with place of supply as outside India; (4) FIRC/BRC (Foreign Inward Remittance Certificate / Bank Realization Certificate) must be maintained for each export invoice — reconciled monthly in accounts; (5) RCM (Reverse Charge Mechanism) on imported services — Chennai IT companies pay 18% GST under RCM on cloud services invoices (AWS Mumbai, Google Cloud, Microsoft Azure), foreign software subscriptions, and international consultant fees; RCM must be paid by 20th of following month and ITC can be simultaneously claimed; (6) STPI Chennai units have additional SOFTEX form filing requirements. LegalKarobar.com handles all these for OMR and Sholinganallur IT companies.

Chennai automobile dealers: Mandatory GST registration regardless of turnover for all registered automobile dealers — vehicles attract 28% GST plus cess; ITC on GST paid on purchase of vehicles is available for dealer businesses; the supplier (Hyundai, BMW, Ashok Leyland) issues tax invoice so dealer must be GST-registered to claim ITC. Annual limit is irrelevant for automobile dealers — even a new dealership selling one car must register. For accessories, spare parts, and workshop services — separate HSN/SAC codes must be set up. For Chennai e-commerce sellers (Amazon, Flipkart, Meesho, Myntra): Mandatory GST registration regardless of turnover — Section 24 of CGST Act mandates e-commerce sellers to register for GST even if annual turnover is below ₹20 lakh. Tamil Nadu sellers on any e-commerce marketplace must register and furnish GSTIN to the marketplace. However, exempt services suppliers (e.g., unregistered restaurant sellers on Swiggy/Zomato below ₹20 lakh) are exempt under DPIIT notification. LegalKarobar.com processes Chennai e-commerce GST registrations same-day.

GST registration threshold for Chennai businesses: Regular taxpayer — mandatory registration if aggregate turnover exceeds ₹20 lakh in Tamil Nadu in a financial year (services or goods). The ₹20 lakh limit applies to the complete financial year cumulative turnover. Special cases requiring mandatory registration regardless of turnover: (1) Inter-state supply of taxable goods or services; (2) E-commerce sellers; (3) Casual taxable persons; (4) Non-resident taxable persons; (5) Persons liable to pay tax under RCM. For Chennai textile and garment traders: cotton yarn, fabric, and readymade garments (up to ₹1,000 per piece) attract 5% GST; garments above ₹1,000 attract 12% GST. Textile manufacturers at Ambattur, Perambur, and Villivakkam who supply to Tamil Nadu wholesale dealers and retail exporters must register. LegalKarobar.com advises Chennai textile businesses on voluntary registration benefits (ITC on capital goods, credibility with buyers) even before mandatory threshold.

GST registration timeline in Chennai: Normal processing is 3–7 working days from ARN generation. The GST officer assigned to your application (CGST Chennai North or South, or Tamil Nadu State GST) may raise a query (notice in Form GST REG-03) within 7 working days — you must respond within 7 days of receiving the notice. If no query, GSTIN is issued within 3 working days. LegalKarobar.com's average Chennai GST registration time: 3–4 working days. Common rejection causes in Chennai GST applications: (1) Electricity bill not in business owner's name — solution: upload NOC from landlord plus rent agreement; (2) Aadhar OTP failure due to unlinked mobile — must visit Aadhar Seva Kendra to update mobile before re-applying; (3) Bank account name mismatch with business name — use a current account opened in business name; (4) Invalid HSN/SAC code selected — particularly common for Chennai IT companies misclassifying services; (5) Digital signature mismatch — Class 3 DSC required for companies, Individual/Class 2 DSC for proprietorship; (6) Residential address uploaded instead of commercial premises in Chennai — TNEB commercial connection required for commercial registration. LegalKarobar.com pre-validates all documents to ensure zero rejection.

Most GST registrations for Chennai-based businesses are completed within 24 hours of us receiving complete, valid documents. The official government processing window is typically 3–7 working days, and our team tracks your ARN and follows up proactively so nothing stalls.

Tamil Nadu's GST state code is 33, so every GSTIN issued to a business based in Chennai begins with '33'. This code determines your home tax jurisdiction — sales within Tamil Nadu attract CGST + SGST, while inter-state sales attract IGST. Getting this right from day one avoids invoicing errors later.