GST in Chennai: CGST, Tamil Nadu SGST, and IGST — FY 2025-26 Guide
Goods and Services Tax (GST) in Chennai, Tamil Nadu operates under a dual structure administered jointly by the Government of India and Tamil Nadu state government. Whether you are a business owner in the OMR IT Corridor / T. Nagar area, a consumer buying services inChennai, or a freelancer invoicing clients across India, the applicable GST component — CGST + Tamil Nadu SGST or IGST — depends on whether the supply is intra-state or inter-state. Chennai is one of only four cities in India designated as 'metro' for HRA purposes under the Income Tax Act — residents get the 50% basic salary HRA exemption. Tamil Nadu has India's highest stamp duty at 7% (vs 5% in Karnataka), making Chennai one of the most expensive states for property registration. Tamil Nadu residents collectively buy over 40% of India's annual gold demand.
CGST vs Tamil Nadu SGST vs IGST: How It Works in Chennai
The fundamental rule:
- Intra-state supply (supplier and recipient both in Tamil Nadu): GST = CGST (central government) + Tamil Nadu SGST (Tamil Nadu government), each at half the total GST rate. On a Rs 1,00,000 invoice at 18%: CGST Rs 9,000 (9%) + Tamil Nadu SGST Rs 9,000 (9%).
- Inter-state supply (supplier in Tamil Nadu, recipient in another state, or vice versa): GST = IGST at the full rate. Same Rs 1,00,000 invoice at 18%: IGST = Rs 18,000 (18%), all to central government (then apportioned to destination state).
- Import of services: IGST under Reverse Charge Mechanism (RCM) — the recipient in Chennai pays GST to the government. Common for Chennai's businesses using foreign software, cloud services, or overseas consultants.
GST Rates Applicable to Chennai's Economy
The four main GST rate slabs apply uniformly across Chennai:
- 5% GST: Essential goods and basic services. For Chennai: non-AC restaurant meals (no ITC for restaurant), economy hotel stays (room rate below Rs 7,500/night), packaged foods with certain HSN codes, economy air travel (excluding fuel surcharge), electric vehicles, and textile goods below Rs 1,000.
- 12% GST: Mid-range goods and services. Relevant for Chennai: hotel stays Rs 7,500–12,000/night, processed food, computers and laptops (with exceptions), smartphones above Rs 20,000 category, business class air travel, construction of affordable housing.
- 18% GST: Most services and manufactured goods. This is the dominant GST rate for Chennai's IT Services sector — IT services, consulting, financial services, insurance (excl. life insurance), telecom, steel, chemicals, paints, AC restaurants, hotel stays above Rs 12,000/night.
- 28% GST: Luxury and demerit goods. Chennai: automobiles (plus cess), luxury hotels, tobacco products, gambling and racing activities, luxury cement. Plus additional cess on many 28% items.
IT Services Sector GST in Chennai
Chennai's dominant IT Services sector — represented by employers like TCS, Cognizant, Infosys — operates primarily under 18% GST for domestic B2B service invoices. Key GST considerations for Chennai IT businesses:
- Software services export (zero-rated): IT exports from Chennaito overseas clients are zero-rated with a Letter of Undertaking (LUT). No GST is charged on the invoice, and businesses can claim refund of Input Tax Credit on inputs used. Filing monthly LUT for exports is critical for Chennai IT exporters.
- Domestic IT B2B invoices: 18% GST applies. On a Rs 10L monthly invoice to a Tamil Nadu client: CGST Rs 90,000 + Tamil Nadu SGST Rs 90,000 = Rs 1.8L total GST. This is fully recoverable as Input Tax Credit by the recipient if they are GST-registered.
- SaaS and software products: 18% GST on perpetual licences, 12% on some packaged software. Cloud-based SaaS services are 18% regardless of how subscription is structured.
- Gold and jewellery: 3% GST on gold (fine gold, ornaments, bars). On Rs 5,00,000 worth of gold: GST = Rs 15,000. Making charges on jewellery attract 5% GST: on Rs 50,000 making charges, GST = Rs 2,500.
- No ITC on gold: Jewellers cannot claim Input Tax Credit on gold purchased — making accurate job work and valuation critical for Chennai's jewellery trade.
- Capital goods: 18% GST on machinery, equipment, and industrial inputs — fully claimable as ITC for manufacturing businesses in Chennai's industrial areas. Proper tracking of capital goods ITC over 5 years (reversed if sold before) is critical.
- Raw material inputs: GST rate varies by HSN code — 5% for textiles, 12% for some chemicals, 18% for metals and engineering goods. ITC chain must be maintained.
- Professional and consulting services: 18% GST under SAC 9983/9985. Freelancers and consultants in Chennai billing above Rs 20L/year must register for GST and charge 18% CGST + Tamil Nadu SGST on domestic invoices.
- Commercial property rent: If annual commercial rent in Chennaiexceeds Rs 20L and the landlord is a GST-registered entity, 18% GST applies. At estimated commercial rents of Rs 50,000/month in Chennai, annual commercial rent is Rs 6,00,000. Annual commercial rent is below Rs 20L — GST on rent may not apply if the landlord is under threshold.
Input Tax Credit (ITC) for Chennai Businesses
GST-registered businesses in Chennai can claim Input Tax Credit on GST paid for goods and services used in their business. ITC rules in Tamil Nadu:
- CGST paid can offset CGST or IGST liability; Tamil Nadu SGST paid can offset Tamil Nadu SGST or IGST; IGST can offset any GST liability (IGST first, then CGST, then SGST).
- Conditions for ITC: Valid tax invoice, goods/services received, GST filed by supplier (reflected in GSTR-2B), and payment made to supplier within 180 days.
- ITC blocked items: Motor vehicles (for personal use), employee-related food and beverages, club memberships, health insurance for employees (unless mandatory under law), works contract for immovable property.
- ITC reconciliation: GSTR-2B (auto-populated) vs your purchase register must be reconciled monthly. Mismatch can lead to ITC disallowance and penalty — a critical compliance task for Chennai's MSMEs and large businesses alike.
GST Registration Threshold and Compliance for Chennai
GST registration is mandatory in Tamil Nadu when aggregate turnover exceeds:
- Rs 40 lakh/year for goods suppliers (Rs 20L for special category states — not applicable to Tamil Nadu).
- Rs 20 lakh/year for service providers.
- Any threshold for inter-state supplies, e-commerce operators, or businesses with taxable supplies despite low turnover.
Chennai freelancers and consultants in the IT Services sector who provide services to clients in other states must register for GST irrespective of turnover — even a single inter-state invoice triggers mandatory registration. Return filing: GSTR-1 (monthly/quarterly for outward supplies) + GSTR-3B (monthly summary + tax payment) + GSTR-9 (annual reconciliation). Businesses in Chennai with turnover above Rs 5 crore must file GSTR-1 monthly. Below Rs 5 crore, quarterly GSTR-1 filing is available under the QRMP scheme.
Composition Scheme: For Small Chennai Businesses
Small Chennai businesses with annual turnover below Rs 1.5 crore (goods) or Rs 50 lakh (services) can opt for the Composition Scheme — pay a fixed percentage of turnover as GST (1% for goods, 6% for services including restaurants) without ITC. Composition dealers cannot raise a tax invoice or collect GST from customers, and cannot supply inter-state. This suits small retailers, restaurants, and service providers inChennai's OMR and Velachery local markets who do primarily local business.
Disclaimer
GST rates and rules are based on notifications effective as of FY 2025-26. Specific HSN/SAC codes may attract different rates. Special economic zone (SEZ) supplies are zero-rated. E-invoicing is mandatory above certain turnover thresholds. Consult a GST practitioner or Chartered Accountant in Chennai for business-specific compliance guidance.