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Electricity Suite

Mumbai Electricity Bill Calculator

Mumbai domestic bill comparison tool including wheeling, regulatory asset charges, and 16% electricity duty.

Live 2026 Data
DISCOMs Covered Adani / Tata / BEST
Average Slab Rate ₹4.50 - ₹15.50
Fixed Charges ₹90 - ₹350 / mo
Electricity Duty 16.0% Active

1. Enter Configuration Parameters

Frequently Asked Questions (FAQ)

Can Mumbai consumers choose their electricity distributor?

Yes, consumers in suburban Mumbai can switch between Adani Electricity and Tata Power using open access grid policies, though physical connections are maintained by the distribution licensee.

How is the fixed demand charge calculated?

For residential connections, the fixed capacity charge is based on your sanctioned load (in kW). It is calculated by multiplying your load by the DISCOM's monthly rate per kW (ranging from Rs. 20 to Rs. 145 depending on the state). It remains constant regardless of whether you consume any electricity.

What is a telescopic slab rate, and how does it affect my bill?

A telescopic slab structure means your consumption is divided into blocks (e.g., 0–100 units, 101–200 units), with each block billed at a different per-unit tariff. Consuming even 1 unit above a slab threshold can push you into a higher rate band, causing your bill to increase.

Are there any hidden taxes or duties on my electricity bill?

Yes, state governments levy an electricity duty (tax) ranging from 5% to 16% on your total energy and fixed charges. Additionally, municipal taxes, green energy cesses, and variable surcharges like FPPCA are added to the final amount.

What is FPPCA on my bill, and why does it change?

Fuel Power Purchase Cost Adjustment (FPPCA) is a variable surcharge representing fluctuations in fuel (coal/gas) prices and power purchase costs. It is updated quarterly or monthly by state regulators and typically ranges from 10 paise to 80 paise per unit.

How does installing a rooftop solar panel reduce my DISCOM bill?

Rooftop solar exports power back to the grid under net-metering. Your monthly units are offset by the solar export units. If your 3 kW solar system exports 300 units and you consume 300 units, your net consumption is 0 units, leaving you with only basic fixed charges.

What is the difference between single phase and three phase supply?

Single phase supply is standard for loads up to 5 kW (small homes), while three phase supply is required for larger loads (above 5 kW) to balance heavy appliances like ACs and water pumps. Fixed capacity charges are significantly higher for three phase connections.

About This Calculator

Target Audience: General users looking for fast, accurate calculations

What Does This Calculator Do?

This calculator estimates residential electricity bills for Mumbai customers and compares costs across Adani Electricity, Tata Power, and BEST.

How to Use It

  1. Monthly Consumption: Enter units consumed (kWh).
  2. Sanctioned Load: Enter sanctioned load (kW).
  3. DISCOM: Choose Adani Electricity, Tata Power, or BEST.

The Logic Explained Simply

  • The Concept: Mumbai is one of the few cities in India with multiple competing electricity distributors. Tariffs are multi-part, consisting of base slabs, wheeling charges (recovering network cost), and regulatory asset charges.
  • The Formula:
  • Total Bill = Fixed Charge + (Slab Energy Charge + Wheeling Charge) * Units + Taxes

Real-World Calculation Breakdown

For 250 units consumption under Adani Electricity:

  1. Fixed Charge: Rs. 140.
  2. Energy Charges:
  • 0-100 units: 100 * Rs. 3.55 = Rs. 355
  • 101-250 units: 150 * Rs. 6.80 = Rs. 1020
  1. Wheeling Charges: 250 * Rs. 1.45 = Rs. 362.50.
  2. Taxes & Duties: 16% on bill = Rs. 299.
  3. Total Estimated Bill: Rs. 2,176.

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