Choose your state and enter the units from your bill. Your estimate and its full breakdown will appear here.
Estimated amount payable
Energy charge by slab
Seasonal estimate, January to June
Assumes summer cooling lifts usage in April to June. Most states revise tariffs each April, so later months may be priced differently.
Ten old bulbs swapped for LEDs typically trims 20 to 30 units a month, which can be enough to keep you out of the next slab.
Each degree warmer cuts compressor work. Going from 18°C to 24°C can save close to a quarter of the AC's consumption.
A 3 kW rooftop system covers most of a typical home's usage, and PM Surya Ghar Muft Bijli Yojana offers a subsidy of up to ₹78,000.
Use the breakdown above to see which slab your last units fall in. Shifting a few units can change the rate on everything above the threshold.
How it works
How your electricity bill is worked out
Every DISCOM in India follows the same four steps. Only the rates and rules change from state to state.
Split units into slabs
Your units are divided into bands, for example the first 100, the next 100 and so on. Each band has its own price per unit, and it usually rises as you go up.
Add the fixed charge
A monthly amount tied to your sanctioned load or to how much you used. It is payable even in a month with zero consumption.
Add adjustments and taxes
Fuel or power purchase adjustment, electricity duty set by the state government, meter rent and any special surcharges.
Subtract subsidies
Free-unit schemes and state subsidies, such as Delhi's 200 free units or Bihar's 125, come off at the end.
A worked example: 250 units in Tamil Nadu
The first 100 units are free. The next 100 cost ₹4.70 each and the remaining 50 cost ₹6.30 each, so the energy charge is 100 × 4.70 + 50 × 6.30 = ₹785.
Add the ₹20 fixed charge, 20 paise per unit fuel adjustment (₹50) and 5% duty on energy plus fixed (₹40.25), and the bill comes to ₹895.25. Try it in the calculator above to see the same breakdown.
Compare
Residential tariffs across India
Compare electricity tariff by state: the lowest and highest slab rate for a home connection, plus what a 200-unit month at 3 kW actually costs once every charge is included.
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“Verified” means the slabs and charges were checked against that state's published tariff order; “Indicative” states use typical rates and are being verified. Rates exclude monthly fuel adjustments you may need to add from your bill. Where a state has urban and rural or several DISCOM variants, the default (urban or first listed) is shown.
Reading your bill
What each line on the bill means
Energy charge
Units multiplied by the slab rates. This is normally the largest part of a household bill.
Fixed or demand charge
Covers the cost of keeping your connection live. Usually priced per kW of sanctioned load, sometimes by usage band or as a flat amount.
Fuel / power purchase adjustment
Called FAC, FSA, FPPCA, FPPPA or FPPAS depending on the state. Passes changes in fuel and power purchase cost through to consumers and is revised monthly or quarterly.
Electricity duty
A state government levy, usually a percentage of energy (and sometimes fixed) charges. It ranges from nothing in some states to 16% in Maharashtra; Telangana charges it per unit instead.
Meter rent
A small monthly rental for the meter the DISCOM installed, typically ₹6 to ₹20 for a single-phase home meter.
Surcharges and late fees
Pension trust and deficit recovery surcharges (Delhi), true-up instalments (Karnataka), and a delayed payment surcharge if you pay after the due date.
FAQ
Common questions
Units consumed are split into slabs and each slab is priced at its own rate. A fixed charge based on sanctioned load is added, then any fuel adjustment charge, electricity duty, meter rent and surcharges. Subsidies are deducted at the end.
One unit is one kilowatt-hour (kWh): a 1,000-watt load running for one hour, or a 100-watt load running for ten hours.
Some states change the whole rate structure once you cross a threshold. Telangana, Kerala and Rajasthan pick a different set of slab rates depending on total monthly usage, and the fixed charge can step up too, so a few extra units can raise the bill noticeably.
They are names for a fuel and power purchase cost adjustment. The regulator lets the distribution company pass changes in coal, gas and power purchase cost on to consumers, usually revised monthly or quarterly, either per unit or as a percentage.
Utilities that read meters every two months, such as in Tamil Nadu and Kerala, bill two months of consumption together. Choose the period that matches your bill and enter the units shown on it.
It uses the slab rates, fixed charges and duties from each state's latest published tariff order where verified, and indicative rates elsewhere. Your actual bill can differ because of arrears, monthly fuel adjustments, rounding, meter reading dates and local levies.
This calculator gives an estimate only. It is not affiliated with any electricity distribution company or regulator. Always check the final amount on your official bill or with your DISCOM.
Running billing for a utility or ISP?
The slab, tier and surcharge logic behind this calculator is the kind of pricing OpenBRM's rating engine handles at scale, on an open platform you control.
