How to Calculate Stamp Duty on a Flat in Kolkata (2026): Step-by-Step

1. Kolkata Municipal Areas & Jurisdictions

Buying a residential flat in the Greater Kolkata area spans multiple municipal jurisdictions, each designated as an Urban Area under the West Bengal Stamp Act:

KMC (Kolkata Municipal Corporation): Covers Central, North, and South Kolkata (Alipore, Ballygunge, Garia, Behala, Tollygunge, Kasba, Jadavpur, Salt Lake Bypass).
Bidhannagar Municipal Corporation: Salt Lake (Sectors 1 to 5), Rajarhat Gopalpur, Baguiati, Kaikhali.
NKDA (New Town Kolkata Development Authority): Action Area 1, Action Area 2, and Action Area 3.
Howrah Municipal Corporation (HMC): Howrah City, Shibpur, Bally.

All of these locations fall under the Urban Rate Slab: 6% stamp duty for valuations up to ₹1 Crore, and 7% stamp duty (with the 1% statutory surcharge) for valuations above ₹1 Crore, along with a 1.1% registration fee.

2. The 3-Step Valuation Formula

Under Section 47A of the Indian Stamp Act as applied to West Bengal, you cannot simply calculate stamp duty on what you paid the builder or seller. You must follow the statutory rule:

Rule of Chargeable Market Value:
Chargeable Base = Maximum(Actual Agreement Consideration, IGR Bengal Government Circle Valuation)

The calculation proceeds in three distinct steps:

Calculate Agreement Consideration: Flat Base Cost + Covered Car Parking Cost + Floor Rise Charges + Preferred Location Charges (PLC).
Generate IGR WB Circle Valuation: Built-up area × Circle Rate per sq.ft. for the specific mouza/ward + Government car parking benchmark valuation.
Apply Applicable Percentage: Calculate 6% (or 7% if > ₹1 Crore) Stamp Duty + 1.1% Registration Fee on the larger of the two values.

3. Car Parking & Amenities Valuation

A frequent point of confusion for first-time Kolkata buyers is how car parking spaces are treated during deed drafting:

Covered / Basement Garage: Assessed at a minimum government benchmark (usually between ₹2,00,000 to ₹4,50,000 depending on the ward). If your developer agreement specifies a higher price (e.g. ₹5,00,000), stamp duty is assessed on the higher agreement price.
Open Surface Parking: Assessed at a lower benchmark valuation, but must still be formally included in the e-Assessment form to ensure legal ownership title.

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4. Case 1: ₹40 Lakh 2BHK in Behala (KMC Ward 120)

Suppose you are purchasing a 2BHK apartment in South Kolkata with a covered parking space:

Super Built-up Area: 850 sq. ft.
Agreement Consideration: ₹40,00,000 (including parking)
Official IGR Circle Value: ₹38,20,000
Chargeable Valuation: ₹40,00,000 (Agreement consideration is higher)
Stamp Duty (6%): ₹2,40,000
Registration Fee (1.1%): ₹44,000
Total Statutory Fee: ₹2,84,000 (7.1% total)

5. Case 2: ₹85 Lakh 3BHK in New Town Action Area 1 (NKDA)

Consider a 3BHK flat in New Town where government circle rates in the prime mouza are slightly higher than older builder launch prices:

Super Built-up Area: 1,350 sq. ft.
Agreement Consideration: ₹85,00,000
IGR Circle Rate Valuation: ₹88,50,000
Chargeable Valuation: ₹88,50,000 (Circle rate is higher, so duty is assessed on ₹88.50L)
Stamp Duty (6%): ₹5,31,000
Registration Fee (1.1%): ₹97,350
Total Statutory Fee: ₹6,28,350

6. Case 3: ₹1.75 Crore Luxury Flat in Ballygunge (High-Value Surcharge)

For properties exceeding the ₹1 Crore threshold, the 1% high-value surcharge activates:

Chargeable Valuation: ₹1,75,00,000
Applicable Stamp Duty Rate: 7% (6% Urban base + 1% Surcharge)
Stamp Duty Amount: ₹12,25,000
Registration Fee (1.1%): ₹1,92,500
Section 194-IA TDS (1%): ₹1,75,000 (Deducted by buyer, paid to Income Tax Dept via Form 26QB)
Total Government Outgo: ₹15,92,500 (excluding incidental deed typing/notary costs)

7. Payment via GRIPS Portal (e-Challan)

In West Bengal, physical stamp papers are obsolete for property conveyances. Stamp duty and registration fees are paid online through GRIPS 2.0 (Government Receipt Portal System) on wbifms.gov.in:

Generate your e-Assessment Slip on the IGR West Bengal portal (wbregistration.gov.in).
Note down the Query Number and Query Year.
Proceed to GRIPS online payment via Net Banking, Debit Card, or NEFT/RTGS.
Download and print the official GRN (Government Reference Number) Challan Receipt.
Submit the challan along with the draft deed during your biometrics appointment at the Sub-Registry office (ARA-I, ARA-II, DSR, or ADSR).