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Tax

GST Calculator — Kolkata (West Bengal SGST) FY 2025-26

For businesses and consumers in Kolkata, West Bengal: intra-state GST splits equally between CGST and West Bengal SGST (each at half the applicable rate), while inter-state supplies attract IGST at the full rate. At 18% GST on a Rs 1L invoice within West Bengal: CGST = Rs 9,000 + West Bengal SGST = Rs 9,000 = total Rs 18,000 GST. GST registration is mandatory above Rs 20L/year for services and Rs 40L/year for goods in West Bengal.

Verified Formula|Source: Income Tax Department, Government of India|Last verified: April 2026Methodology

GST Details

Calculate GST on top of the base amount

Inter-State Supply (IGST)

CGST + SGST applies for intra-state transactions

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Net Price

₹1,00,000

GST Amount

₹18,000

Total Price

₹1,18,000

GST Breakdown

Base Amount₹1,00,000
CGST @ 9%₹9,000
SGST @ 9%₹9,000
Total GST₹18,000
Net Price (Excl. GST)₹1,00,000
Total Price (Incl. GST)₹1,18,000

Price Composition

Common GST Rates — Quick Reference

Item / CategoryGST Rate
Essential food items (rice, wheat, milk)0%
Packaged food, butter, ghee5%
Processed food, mobile phones12%
Electronics, shampoo, AC restaurants18%
Luxury cars, aerated drinks, tobacco28%
Gold, silver, platinum3%
Rough diamonds0.25%

Input Tax Credit (ITC)

Businesses registered under GST can claim Input Tax Credit on GST paid on purchases, effectively reducing the GST liability on their sales. Ensure timely GSTR-2B reconciliation to maximize your ITC claims.

GST in Kolkata: CGST, West Bengal SGST, and IGST — FY 2025-26 Guide

Goods and Services Tax (GST) in Kolkata, West Bengal operates under a dual structure administered jointly by the Government of India and West Bengal state government. Whether you are a business owner in the BBD Bagh / Salt Lake Sector V area, a consumer buying services inKolkata, or a freelancer invoicing clients across India, the applicable GST component — CGST + West Bengal SGST or IGST — depends on whether the supply is intra-state or inter-state. Kolkata is one of the four designated metro cities for HRA (along with Delhi, Mumbai, Chennai), giving residents the 50% basic salary HRA exemption. Yet Kolkata has India's lowest average salary among the six metros at Rs 7.5 lakh, and also the lowest cost of living (index 58 vs Mumbai's 100) — meaning net take-home purchasing power is often comparable to Mumbai.

CGST vs West Bengal SGST vs IGST: How It Works in Kolkata

The fundamental rule:

  • Intra-state supply (supplier and recipient both in West Bengal): GST = CGST (central government) + West Bengal SGST (West Bengal government), each at half the total GST rate. On a Rs 1,00,000 invoice at 18%: CGST Rs 9,000 (9%) + West Bengal SGST Rs 9,000 (9%).
  • Inter-state supply (supplier in West Bengal, 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 Kolkata pays GST to the government. Common for Kolkata's businesses using foreign software, cloud services, or overseas consultants.

GST Rates Applicable to Kolkata's Economy

The four main GST rate slabs apply uniformly across Kolkata:

  • 5% GST: Essential goods and basic services. For Kolkata: 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 Kolkata: 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 Kolkata'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. Kolkata: 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 Kolkata

Kolkata's IT Services sector has specific GST implications that businesses and professionals here must navigate:

  • Professional and consulting services: 18% GST under SAC 9983/9985. Freelancers and consultants in Kolkata billing above Rs 20L/year must register for GST and charge 18% CGST + West Bengal SGST on domestic invoices.
  • Commercial property rent: If annual commercial rent in Kolkataexceeds Rs 20L and the landlord is a GST-registered entity, 18% GST applies. At estimated commercial rents of Rs 37,500/month in Kolkata, annual commercial rent is Rs 4,50,000. Annual commercial rent is below Rs 20L — GST on rent may not apply if the landlord is under threshold.

Input Tax Credit (ITC) for Kolkata Businesses

GST-registered businesses in Kolkata can claim Input Tax Credit on GST paid for goods and services used in their business. ITC rules in West Bengal:

  • CGST paid can offset CGST or IGST liability; West Bengal SGST paid can offset West Bengal 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 Kolkata's MSMEs and large businesses alike.

GST Registration Threshold and Compliance for Kolkata

GST registration is mandatory in West Bengal when aggregate turnover exceeds:

  • Rs 40 lakh/year for goods suppliers (Rs 20L for special category states — not applicable to West Bengal).
  • Rs 20 lakh/year for service providers.
  • Any threshold for inter-state supplies, e-commerce operators, or businesses with taxable supplies despite low turnover.

Kolkata 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 Kolkata 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 Kolkata Businesses

Small Kolkata 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 inKolkata's Salt Lake and New Town 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 Kolkata for business-specific compliance guidance.

Frequently Asked Questions — GST in Kolkata

What is the difference between West Bengal SGST and SGST? Is West Bengal SGST the same as SGST?

Yes — West Bengal SGST is the State GST (SGST) for West Bengal. The term "SGST" in the GST framework is referred to by each state's specific name: Maharashtra's SGST is "Maharashtra SGST", Karnataka's is "Karnataka SGST", etc. For Kolkata (West Bengal), all intra-state transactions split GST into CGST (Central GST) and West Bengal SGST (West BengalSGST), each at half the applicable rate. On an 18% intra-state invoice of Rs 1,00,000: CGST = Rs 9,000 andWest Bengal SGST = Rs 9,000.

Do I need to charge GST on my Kolkata freelance income?

You need to register for GST if your annual freelance income exceeds Rs 20 lakh (services threshold for West Bengal) or if you supply services to clients in other states (inter-state supply triggers mandatory registration at any turnover). Once registered, you charge 18% GST (CGST 9% + West Bengal SGST9%) on domestic invoices. If you export services to overseas clients, it's zero-rated with an LUT — no GST charged, but you can claim ITC refunds on inputs. Kolkata's thriving IT Services freelance economy means many consultants hit the Rs 20L threshold quickly — plan your GST registration well in advance to avoid retrospective compliance issues.

What GST applies on restaurant bills in Kolkata?

GST on restaurants in Kolkata depends on the type. Non-AC restaurants (standalone, not in hotels with room tariff above Rs 7,500): 5% GST (CGST 2.5% + West Bengal SGST 2.5%), no Input Tax Credit. AC restaurants or those in 5-star hotels: 18% GST (CGST 9% +West Bengal SGST 9%), no ITC. On a Rs 5,000 dinner: 5% restaurant = Rs 250 GST; 18% restaurant = Rs 900 GST. Restaurant GST cannot be claimed as ITC by the customer — it is a final consumer cost. Zomato/Swiggy delivery orders from restaurants also attract 5% GST (collected by the platform, not the restaurant).

How does GST work for Kolkata businesses buying from another state?

When a Kolkata (West Bengal) business buys goods or services from a supplier in another state, IGST (Integrated GST) applies at the full rate. For example, buying software services from a Bengaluru vendor (if you are in Kolkata, West Bengal): 18% IGST applies. You pay IGST on the invoice, which is deposited with the central government and then apportioned to the consuming state. As a West Bengal registered business, you can claim the IGST paid as Input Tax Credit. ITC utilisation order: first against IGST liability, then CGST, then West Bengal SGST. This seamless cross-state ITC chain is one of GST's major improvements over the pre-GST era when inter-state purchases suffered from cascading VAT and CST costs.

Kolkata's GST landscape is defined by its historical economic character: jute industry (5% GST on raw jute, 5% on jute products), coal and power generation (5% on coal, 18% on electricity — though electricity itself is outside GST currently under state taxation), tea industry (5% on unprocessed tea, 18% on packaged tea, relevant for Kolkata's major tea auction houses), and the Haldia port chemical complex. The city's historic Burrabazar wholesale market, Fancy Market for textile wholesale, and Poddar Court commercial complex create large B2B trading volumes with complex invoice chains. West Bengal's state GST department (WBGST) has been notably active in enforcement — particularly regarding ITC claims by wholesale traders and the invoice matching requirement. Kolkata's jute mill belt in Howrah and Barrackpur creates unique GST situations for natural fibre processing where multiple rate slabs (0% for raw, 5% for processed) coexist. The IT services sector at Salt Lake Sector V (TCS, Infosys, IBM, Wipro) mirrors Bengaluru's export-of-services framework. Kolkata Port Trust services: loading/unloading at Kolkata Port for international cargo is exempt from GST. Film industry: Tollywood (Bengali cinema) at 18% GST for production services. Real estate: under-construction residential at 5%, commercial at 12%.

Key Insight — Kolkata

Kolkata's defining GST insight is the jute industry's unique GST exemption-to-taxable transition and its ITC consequences — where a jute miller purchasing raw jute (exempt, zero GST on purchase) and manufacturing jute sacks (5% GST on sale) faces an inverted ITC situation because the manufacturing inputs (machinery at 18%, electricity outside GST, labour) don't generate GST ITC that can offset the 5% output GST on jute sacks. The input GST problem for jute millers: Machinery maintenance: 18% GST. Packaging materials: 12-18% GST. Transport: 5% GST. Professional services: 18% GST. But the primary input — raw jute — is EXEMPT (no GST). So the jute miller cannot accumulate significant ITC from raw material, yet pays 5% GST on output jute sacks. In theory, ITC from machinery/services partially offsets the 5% output. In practice, jute mills have significant ITC accumulation from machinery and overhead but relatively small offset from the nil-GST raw material. The result: jute manufacturers can claim refund for ITC accumulated on capital goods and services used in jute production (Section 54(3)(ii) — inverted duty structure refund is available for jute goods). The West Bengal GST department has been engaged with jute industry associations on the refund process. For Kolkata's Howrah jute mills: optimizing ITC refund claims requires detailed input attribution — which ITC is attributable to 5% jute output vs 12% carpet output vs exempt raw jute. The attribution methodology under Rule 42 determines refund quantum.

Kolkata's Financial Context and GST Calculator

West Bengal SGST: 9% (CGST 9% + WBGST 9% = 18% standard). GST registration: Rs 20L threshold. Jute industry GST: raw jute (HSN 5303): exempt. Jute yarn/twine: 5%. Jute sacks, woven fabric: 5%. Jute carpets, rugs: 12%. Tea industry: tea (HSN 0902) in bulk/loose: 5%. Packaged tea (branded): 18%. Tea leaves in packet: 5%. Kolkata tea auction houses (J Thomas, M/s Dharampal Satyapal): tea auction transactions attract 5% GST. Coal: 5% GST on coal, briquettes, ovoids. Electricity: OUTSIDE GST — electricity distribution is under state taxation (state electricity duty). Power generation fuel (coal) at 5% → ITC chain up to power generation, but electricity itself is not GST. Chemical complex (Haldia): chemicals vary 12-18% depending on HSN. Port-related services: loading/unloading at Kolkata Port, Haldia Port → exempt if provided to shipping company for international cargo. Customs house agent (CHA) services: 18% GST. Freight forwarding: 18% GST. Cold storage (Kolkata's large cold chain for fish, vegetables): cold storage rental of agricultural produce → exempt from GST. Cold storage for non-agricultural goods → 18% GST. Salt Lake IT: 18% on services, zero-rated on exports. Restaurant GST: 5% (no ITC). Commercial rent: 18%.

Kolkata's Tea Auction Industry — GST on Tea Transactions and Broker Services

Kolkata's tea auction market (one of world's largest, managing Darjeeling, Assam, and Dooars tea) creates a specific GST compliance ecosystem involving planters (producers), auction companies, brokers, buyers, and blenders. GST rate hierarchy in the tea supply chain: Tea planter (estate level): tea leaves and unmanufactured tea → exempt from GST (agricultural produce). Planter sends to factory: green leaf processing (withering, rolling, drying) → manufactured tea (bulk). Manufactured bulk tea (not in retail packaging): 5% GST. Auction house commission: J Thomas & Co., M/s Dharampal → 18% GST on brokerage/commission from buyers and sellers at auction. Tea buyer (blender or exporter): purchases tea at auction, receives 5% GST invoice → claims ITC. Blender processes and packages tea → retail branded tea in packets: 18% GST if branded retail sale. Export of tea by Kolkata exporters: zero-rated under LUT → full ITC on 5% input tea + packaging (18%) + freight (5%) → ITC refund available. The auction house's GST: on Rs 50Cr tea sold through auction at 5% brokerage: Rs 2.5Cr brokerage × 18% GST = Rs 45L GST on brokerage. Buyer and seller share brokerage → respective parties claim ITC. Tea board exports benefit: MEIS/RoDTEP scheme additionally provides refund on tea exports. Tea blender in Kolkata (processing Rs 100Cr bulk tea): Input GST (5% on Rs 100Cr) = Rs 5Cr ITC. Output GST (18% on Rs 120Cr branded pack retail): Rs 21.6Cr. Net GST payable: Rs 16.6Cr. Significant value-added, ITC efficient.

Burrabazar Wholesale Market — B2B Invoice Chains and WBGST Enforcement

Kolkata's Burrabazar, Fancy Market, and Metiabruz wholesale textile, plastic, and sundry goods markets generate enormous B2B invoice volumes with complex multi-tier distribution chains. WBGST enforcement has been particularly active in identifying 'fake ITC' scenarios — where downstream buyers claim ITC but the upstream supplier never pays GST. The Burrabazar GST compliance challenge: (1) Small supplier network: Many Burrabazar wholesale suppliers have turnover between Rs 20-40L and may be newly registered or unregistered (if <Rs 20L/Rs 40L threshold for goods). Buying from unregistered supplier: buyer must pay GST on RCM (Reverse Charge Mechanism) for certain notified goods and services — but RCM for trading goods from unregistered suppliers is currently not universally applicable post-2018 suspension. (2) GSTR-2B verification: All ITC claims must reconcile with GSTR-2B auto-populated from supplier's GSTR-1. If supplier doesn't file GSTR-1 or files incorrectly: buyer's ITC is suspended. WBGST audit frequently checks GSTR-2B vs ITC claimed. (3) E-way bill compliance: Every consignment above Rs 50,000 in value requires e-way bill for inter-state movement. Burrabazar supplies to Bihar, Jharkhand, Odisha frequently: e-way bill mandatory. Intra-WB movement above Rs 1L: e-way bill mandatory. (4) Cash sales in wholesale: Large cash transactions without invoice are GST violations. WBGST anti-evasion has conducted Burrabazar inspections, seizing goods without proper documentation. Compliance recommendation: Burrabazar traders should ensure every purchase has valid GST invoice, GSTR-2B is reconciled monthly, and e-way bills are pre-generated before goods leave godown.

More Questions — GST Calculator in Kolkata

I'm a Kolkata jute exporter (Rs 50Cr export revenue, zero-rated). My inputs: Rs 30Cr raw jute (exempt, no GST), Rs 8Cr machinery maintenance and consumables (18% GST), Rs 3Cr packaging (12% GST). How much ITC refund?

Jute exporter ITC refund calculation: Total ITC available: Machinery maintenance: Rs 8Cr × 18% = Rs 1.44Cr ITC. Packaging: Rs 3Cr × 12% = Rs 36L ITC. Raw jute: EXEMPT → zero ITC. Total ITC: Rs 1.44Cr + Rs 36L = Rs 1.8Cr. Output GST: Rs 50Cr export × 0% (zero-rated, LUT) = zero output GST. No domestic sales → zero output GST. Net ITC accumulation: Rs 1.8Cr (no output to offset). Refund claim under Section 54(3)(i) — accumulated ITC on account of export: eligible for full refund of Rs 1.8Cr. Formula check: Net ITC refund = ITC × (zero-rated turnover / total turnover). If 100% export: Rs 1.8Cr × 100% = Rs 1.8Cr refund eligible. File monthly RFD-01 application: export turnover + LUT reference + GSTR-2B ITC details → provisional refund 90% = Rs 1.62Cr within 7 days. Balance 10% after officer verification within 60 days. Required documents: LUT acknowledgment, bank realization certificates (BRC) from bank confirming USD receipts, shipping bills (for goods export), export invoices, GSTR-1 with export details, GSTR-2B showing input ITC. Timeline for Rs 1.8Cr annual refund (Rs 15L/month): if timely BRC submission: monthly refund = Rs 15L. Annual refund total: Rs 1.8Cr. This is critical working capital for your jute export business — efficient BRC filing is paramount. Engage CA experienced in IGST refund for goods exporters.

My Kolkata Salt Lake IT company (Rs 4Cr revenue, all domestic B2B at 18%) wants to start exporting services to a Singapore client. Do I need a new GSTIN or just update existing?

Adding export services to existing GST registration: No new GSTIN needed — your existing GSTIN covers all supplies (domestic and export) from the same business entity. Steps to start exporting services: (1) File Letter of Undertaking (LUT) for the current financial year: Go to GST portal → Services → User Services → Furnish Letter of Undertaking (LUT) → Form RFD-11. Select 'Export of services without payment of integrated tax'. Submit online — acknowledgment immediately. (2) Update your GSTR-1 to include export invoices: When you raise the Singapore invoice, classify it as 'Export' in GSTR-1. Export invoice must show: client's name, country, invoice amount in foreign currency, currency type. No GSTIN of foreign client required. (3) Raise zero-GST invoice to Singapore client: Invoice in INR or USD (commonly USD for Singapore). Amount: USD X without adding any Indian GST. Payment: Singapore client remits in USD to your India bank account → bank issues FIRC/BRC (Foreign Inward Remittance Certificate). (4) Maintain BRC for refund purposes: Submit BRC to GST department when filing export ITC refund (if ITC accumulated). (5) Your domestic ITC from Rs 4Cr domestic revenue: Rs 4Cr × 18% = Rs 72L output GST. Input ITC: office rent 18%, software subscriptions 18%, other services 18% — say Rs 20L ITC. Net GST payable (domestic): Rs 52L. Export ITC: additional inputs used for Singapore project → proportional ITC. If no refund needed (domestic GST absorbs all ITC): no refund application. If export grows significantly (Rs 3Cr export, Rs 1Cr domestic): ITC refund needed → file RFD-01 monthly.

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