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GST Registration in Kolkata: CA-Assisted GSTIN for Every Business

Reviewed by CA and CS Team, Patron Accounting LLP ICAI & ICSI Registered| 15+ Years Experience| Last Updated: 08 April 2026 Verify Credentials →

Documents:: PAN, Aadhaar, business proof, address proof, bank details

Fees:: No govt fee | CA from Rs 2,999 | Timeline: 3-7 working days

Eligibility:: Turnover > Rs 40L goods / Rs 20L services | Mandatory for e-commerce/interstate

Authority:: GST portal (gst.gov.in) | CGST Kolkata | WB Commercial Taxes | State code: 19

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Real Stories from Real People

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“
GSTIN in 5 days. 50+ HSN codes mapped correctly for our wholesale business. Monthly GSTR-1 and 3B filed on time. ITC reconciliation saves us lakhs every year.
RG
Wholesale Trader
Burrabazar
★★★★★
“
SaaS startup GST registration. SAC codes for IT consulting mapped correctly. Interstate invoicing set up from Day 1. ITC on office rent and cloud services claimed properly.
AD
Founder, SaaS Startup
Salt Lake Sector V
★★★★★
“
Restaurant on Park Street. Patron advised Composition scheme - 5% with simpler returns. Perfect for our intrastate-only operations. Quarterly CMP-08 filed without hassle.
KM
Restaurant Owner
Park Street
★★★★★
“
Export company at Kolkata Port. Patron registered GST, filed LUT same day. IGST refund on exports tracked. E-way bill generation set up for all shipments. Extremely knowledgeable team.
PB
Director, Export Co
Kolkata Port
★★★★★
“
E-commerce seller on Amazon. Patron registered GST before we listed. TCS compliance set up. Monthly returns with ITC from inventory purchases. Biometric verification coordinated same week.
SB
E-Commerce Seller
New Town
★★★★★

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GST Registration in Kolkata: Overview

📌 TL;DR - GST Registration Services at a Glance

GST registration in Kolkata obtains a 15-digit GSTIN via gst.gov.in under CGST Act 2017 and WBGST Act 2017. Mandatory when turnover exceeds Rs 40L (goods) or Rs 20L (services). E-commerce, interstate, and reverse charge must register regardless. No govt fee. Aadhaar biometric verification mandatory. State code 19 (West Bengal).

Kolkata is eastern India's commercial capital - Burrabazar wholesale trading, Salt Lake IT, New Town startups, Dalhousie BFSI, Park Street hospitality, Taratala manufacturing, and Netaji Subhas Dock exports. Every business reaching the threshold needs GSTIN. Learn more about GST Registration across India.

GST filed on gst.gov.in using REG-01. CGST Commissionerates (North/South/Central) handle central tax. WB Commercial Taxes handles SGST. CA ensures Aadhaar biometric, HSN/SAC mapping, and return setup. Same CA handles Pvt Ltd, LLP, and accounting.

Content is reviewed quarterly for accuracy.

What Is GST Registration?

GST registration is the process of obtaining a 15-digit GSTIN from the GST portal under the CGST Act, 2017 and WBGST Act, 2017, enabling a business to collect tax, claim input tax credit, file returns, and conduct interstate trade.

Regular registration or Composition Scheme (up to Rs 1.5 Cr goods / Rs 50L services with lower rates but no ITC). Filed via gst.gov.in with Aadhaar biometric verification. No government fee.

For Kolkata: Burrabazar wholesale traders, Salt Lake IT companies, Park Street restaurants, Taratala manufacturers, Kolkata Port exporters, and e-commerce sellers all need GSTIN with correct HSN/SAC codes mapped to their product/service categories.

Key Terms for GST Registration:

  • GSTIN: 15-digit GST Identification Number starting with 19 (WB)
  • REG-01: GST registration application form on gst.gov.in
  • HSN/SAC: Product codes (HSN) and service codes (SAC) with GST rates
  • GSTR-1: Outward supply return (monthly/quarterly)
  • GSTR-3B: Summary return with tax payment (monthly/quarterly)
  • ITC: Input Tax Credit on purchases - claimed via GSTR-2B reconciliation
  • Composition: Lower rates (1%/5%/6%) but no ITC, no interstate
  • WB PT: Professional Tax (Rs 110-200/month) via wbcomtax.gov.in
GST 19XXXXX GSTR-1 | 3B | ITC CGST+WBGST GST Registration
CGST + WBGST 2017 GST Registration

Who Needs GST Registration in Kolkata?

Wholesale Traders (Burrabazar): Grains, spices, textiles, FMCG. Cross Rs 40L quickly. HSN mapping critical. E-way bills for goods movement.

IT/SaaS (Salt Lake / New Town): Register once services > Rs 20L. Many register voluntarily for ITC on rent, cloud, equipment. SAC 998314. Interstate.

Restaurants/Hotels (Park Street / Esplanade): Register if > Rs 20L. Regular (18% with ITC) or Composition (5% no ITC). KMC Trade License parallel.

Manufacturers (Taratala / Howrah): > Rs 40L goods. HSN per product. ITC on raw materials. E-way bills for dispatch.

Exporters (Kolkata Port / Netaji Subhas Dock): Mandatory interstate registration. Zero-rated exports. LUT filing. IGST refund or bond.

E-Commerce Sellers: Mandatory regardless of turnover. Amazon, Flipkart, Meesho. TCS compliance. Registration before listing.

GST Registration Services Included

ServiceWhat We Do
GST Type AssessmentRegular vs Composition based on turnover, supply type, interstate/intrastate operations
REG-01 FilingComplete application on gst.gov.in. Business, promoter, premises, HSN/SAC, bank details. DSC/EVC signing
Aadhaar Biometric CoordinationPost-2025 mandatory. Appointment at designated Kolkata centre. CA coordinates scheduling
HSN/SAC Code MappingEvery product/service mapped to correct code and GST rate. Critical for Burrabazar multi-commodity traders
GSTIN Certificate DownloadREG-06 with 15-digit GSTIN (19XXXXX). Displayed at Kolkata premises as required
WB Professional Tax AdvisoryPTRC/PTEC registration via wbcomtax.gov.in GRIPS. Rs 110-200/month slab
Return Filing SetupGSTR-1, GSTR-3B, GSTR-9 calendar. E-way bill. IGST refund for exporters. QRMP option
ITC OptimisationMaximum eligible ITC on rent, utilities, equipment. GSTR-2B reconciliation configured
Our Process

GST Registration Process in Kolkata

From type assessment to REG-01 filing, biometric verification, and GSTIN - here's how Patron registers your Kolkata business.

Step 1

Determine GST Registration Type

CA assesses turnover, supply type, and interstate operations. Regular vs Composition (1% mfg, 5% restaurants, 6% services). Composition: no ITC, no interstate. CA advises optimal scheme for Kolkata business.

Type determined Scheme selected
REGULARCOMPOSITIONASSESS
Type Selected01
Step 2

Collect Documents and Prepare Application

PAN, Aadhaar, photographs, business proof (COI/partnership deed), Kolkata premises proof (KMC tax/rent+NOC+electricity), bank details. HSN/SAC codes mapped to products/services with correct rates.

Documents ready HSN/SAC mapped
HSN / SAC5% 12% 18% 28%
Application Ready02
Step 3

File GST REG-01 on Portal

CA files on gst.gov.in. TRN generated. Part B completed: business details, promoter details, Kolkata premises, goods/services with codes, bank account. Documents uploaded. DSC/EVC signed.

REG-01 filed TRN generated
REG-01gst.gov.inFILED
Filed03
Step 4

Aadhaar Biometric Verification

Mandatory post-2025. Applicant visits designated Kolkata centre. CA coordinates appointment scheduling. Timely completion critical for ARN generation and approval.

Biometric done ARN active
AADHAARBIOMETRICVERIFIED
Verified04
Step 5

GSTIN Issuance (REG-06)

GST officer processes in 3-7 days. Physical verification if triggered (rented premises). CA ensures originals available. 15-digit GSTIN (19XXXXX) issued. Certificate downloaded and displayed.

GSTIN issued Certificate ready
GSTIN19XXXXX15-DIGIT
Registered05
Step 6

Post-Registration: Bank, Returns, ITC

Bank details updated within 30 days (mandatory). GSTR-1/3B calendar set. E-way bill configured. WB PT registered. ITC reconciliation. For exporters: LUT filed before first shipment.

Returns setup ITC optimised
GSTR-1 ✓GSTR-3B ✓ITC ✓E-WAY ✓
Fully Operational06

Documents Required

  • PAN: Of business entity (company/LLP/partnership/individual)
  • Aadhaar: Of all promoters/partners/directors (biometric verification)
  • Photographs: Of promoters/partners/directors
  • Business Proof: COI, partnership deed, LLP agreement
  • Address Proof: KMC property tax receipt or rent agreement + NOC + electricity bill
  • Bank Details: Statement or cancelled cheque (update within 30 days of GSTIN)

Kolkata-Specific Tip: Rented premises in Burrabazar and Park Street may trigger physical verification by GST officer. Ensure rent agreement address exactly matches utility bill. Patron's CA verifies address consistency before filing to minimise verification triggers.

Common Challenges in Kolkata

ChallengeImpactHow Patron Accounting Solves It
Biometric Verification DelaysLimited appointment slots during peak periodsCA schedules biometric immediately after application
Physical Verification (Rented)Address mismatch, absent proprietor during visitCA ensures address consistency and coordinates presence
HSN/SAC Code ErrorsWrong codes = wrong GST rate = notices during scrutinyCA maps every product/service to correct code before filing
Bank Non-Updation (30 Days)Non-updation triggers GST suspension - no returns, no e-wayCA updates bank details immediately after GSTIN issuance
Multi-State Registration ConfusionUnnecessary registrations in other statesCA advises correct strategy - single WB GSTIN for intra-state

GST Registration Fees in Kolkata

Fee ComponentAmount
Government FeeNIL (no govt charge for GST registration)
Professional Fee (Patron CA)Rs 2,999-5,999 (REG-01, HSN/SAC, biometric coordination)
DSC (for companies/LLPs)Rs 800-1,500 (Class 2/3 for authorised signatory)
WB Professional TaxIncluded in advisory (separate govt fee via GRIPS)
GST Return Filing (ongoing)Rs 1,500-5,000/month (GSTR-1, GSTR-3B, GSTR-9)
Total (Registration)Rs 2,999-7,500 one-time estimated

All fees and charges listed are indicative only and do not constitute a binding offer. Final amounts may vary depending on the volume of work and the complexity involved.

Professional service charges for drafting, filing, and representation are separate from the statutory fees. The exact fee depends on the complexity of the case, disputed amount, and number of hearings required. Contact us for a detailed quote.

Get a free GST Registration consultation - Call +91 945 945 6700 or WhatsApp us. No-obligation assessment.

Registration Timeline

StageEstimated Timeline
Document CollectionDay 1-3 (CA verifies all documents)
REG-01 Filing on gst.gov.inDay 3-4 (TRN generated, Part B completed)
Aadhaar Biometric VerificationDay 4-7 (appointment at designated centre)
GST Officer ProcessingDay 7-14 (3-7 days; physical verification if triggered)
GSTIN Issuance (REG-06)Day 7-14 (certificate downloaded)
Bank Update + Returns SetupDay 14-20 (within 30 days mandatory)

Kolkata Processing Note: GST registration is 100% online via gst.gov.in. Aadhaar biometric requires one centre visit. Physical verification may apply for rented premises. CA files query-proof applications and coordinates biometric promptly for fastest GSTIN issuance.

Key Benefits

Why Choose Patron for GST in Kolkata?

HSN/SAC Code Expertise

Every product and service mapped to correct code and GST rate. Critical for Burrabazar multi-commodity traders and Salt Lake IT companies.

Biometric + Verification

Aadhaar biometric coordinated promptly. Premises verification managed - address consistency ensured. Fastest GSTIN issuance.

4-Office Authority

Offices in Pune, Mumbai, Delhi, Gurugram. Multi-state businesses get coordinated GST across all locations.

Returns + ITC from Day 1

GSTR-1/3B/9 calendar set. E-way bill. ITC optimisation. WB PT registered. Exporters: LUT filed. Zero compliance gaps.

Trusted by Kolkata Businesses

10,000+ Businesses Served | 4.9 Google Rating | 50,000+ Documents Filed | 15+ Years

"Patron got our GSTIN in 5 days. HSN codes for 50+ product categories mapped correctly. Monthly GSTR-1 and 3B filed on time. ITC reconciliation saves us lakhs every year."

- Wholesale Trader, Burrabazar

With offices in Pune, Mumbai, Delhi, and Gurugram, Patron serves Kolkata through a digital-first CA team.

Regular vs Composition GST for Kolkata

FeatureRegular GSTComposition Scheme
Turnover LimitNo upper limitRs 1.5 Cr goods / Rs 50L services
Tax Rate5%/12%/18%/28% per HSN/SAC1% mfg, 5% restaurants, 6% services
Input Tax CreditCan claim ITCCannot claim ITC
Interstate SupplyAllowedNot allowed - intrastate only
ReturnsGSTR-1 + GSTR-3B (monthly/quarterly)CMP-08 quarterly + GSTR-4 annual
Tax InvoiceFull tax invoice with GST breakupBill of supply only
Ideal For KolkataBurrabazar exporters, Salt Lake IT, interstate manufacturersSmall retailers, local restaurants, neighbourhood services

Related Services

Legal and Compliance Framework

  • CGST Act, 2017 | WBGST Act, 2017 | IGST Act, 2017
  • Section 22 - registration | Section 24 - compulsory | Section 25 - procedure
  • Section 10 - Composition | Section 29 - cancellation | Section 122 - penalties
  • GST portal: gst.gov.in | WB Commercial Taxes: wbcomtax.gov.in
  • CGST Commissionerates: Kolkata North, South, Central

Key Forms: REG-01 (application) | REG-06 (certificate) | GSTR-1 | GSTR-3B | GSTR-9 | CMP-08 | RFD-11 (LUT exporters)

Penalties: No registration when mandatory: Rs 10,000 or tax evaded | Late returns: Rs 50/day | 6 months non-filing: cancellation

FAQs - GST Registration in Kolkata

Common questions about GSTIN, turnover threshold, biometric, HSN/SAC, Composition, and returns for Kolkata businesses.

Quick Answers

GST registration kya hai? GSTIN - 15-digit number. Tax invoice, returns, interstate trade ke liye zaroori. Kolkata state code 19.

Kolkata mein GST kaise banwayein? Patron se call karein +91 945 945 6700. CA gst.gov.in pe REG-01 file karta hai. 3-7 din mein GSTIN.

Turnover limit? Goods Rs 40L. Services Rs 20L. E-commerce aur interstate mandatory.

Don't Wait - Get Your GSTIN Today

Operating without GST when mandatory = Rs 10,000+ penalty under Section 122. Bank details must be updated within 30 days of registration. GSTR-3B non-filing for 6 months = cancellation. E-commerce sellers must register before listing. Start with CA-managed registration today.

Get Started with GST Registration in Kolkata

GST registration in Kolkata provides GSTIN for tax collection, ITC, returns, and interstate trade under CGST/WBGST Act 2017. Filed online at gst.gov.in with Aadhaar biometric verification.

Kolkata businesses across Salt Lake, Burrabazar, Dalhousie, Park Street, Taratala, Howrah, and Netaji Subhas Dock benefit from CA-managed HSN/SAC mapping, biometric coordination, and integrated WB PT, return filing, and ITC optimisation.

Patron Accounting LLP has served 10,000+ businesses, filed 50,000+ documents, and maintained a 4.9 Google rating across 15+ years of chartered accountancy practice.

Book a Free Consultation - No Obligation.

GST Registration Across India

CA-assisted GSTIN in 8 cities.

Pune
Maharashtra
Mumbai
Maharashtra
Delhi
Delhi NCR
Gurugram
Haryana
Bangalore
Karnataka
Hyderabad
Telangana
Chennai
Tamil Nadu
Kolkata
West Bengal
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Content Created: 08 April 2026  |  Last Updated: 08 April 2026  |  Next Review: 08 October 2026  |  Reviewed By: CA & CS Team, Patron Accounting LLP

This content covers GST registration in Kolkata including CGST/WBGST Act 2017, gst.gov.in, HSN/SAC, Aadhaar biometric, Regular vs Composition, WB PT, and return filing. Reviewed semi-annually. Freshness Tier 2.

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