Daily · Free tool
Electricity Bill Calculator
State-wise domestic slab tariffs. Adds fixed charge and electricity duty/cess. Approximate — actual bill may vary by city tariff, time-of-day rates and FPPCA.
Approximate — excludes time-of-day premium, FPPCA and meter rent.
How slab tariff billing works
State DISCOMs charge a telescopic (slab) tariff: the first 100 units (kWh) at one rate, the next 100 at a higher rate, and so on. The total energy charge is the sum across slabs. On top of that, you pay a fixed charge per kW of sanctioned load (sometimes per connection) and electricity duty (a state tax of roughly 5–16%). Finally a Fuel and Power Purchase Cost Adjustment (FPPCA) shows up monthly — this is the variable cost the DISCOM passes through.
Worked example
A Mumbai (MSEDCL) flat consuming 400 units/month pays: 0–100 at ₹4.71, 101–300 at ₹10.29, 301–500 at ₹14.55 — energy ₹471 + ₹2,058 + ₹1,455 = ₹3,984. Add fixed charge ₹128 and ~16% electricity duty ≈ ₹658. Total ≈ ₹4,770 (excluding FPPCA). Same 400 units in Bengaluru on BESCOM cost ~₹3,400 because Karnataka subsidises the first 50 free units under Gruha Jyothi for eligible households. Same 400 units in Delhi (BSES Rajdhani) cost ~₹1,000 after the 200-unit free + 50% subsidy on 201–400.
When to use this
- Comparing rent across cities — electricity is the second-biggest utility after rent itself
- Sizing a rooftop solar plant — you want to cover slabs 3 and 4 first because they're costliest
- Deciding between an inverter AC and an old window AC — the slab jump from 300 to 500 units matters
- Checking if your DISCOM bill matches the tariff order on the SERC website
Pair this with cooler vs AC and AC tonnage / BTU calculator to estimate the new bill before you buy.
FAQ
Why does my actual bill look higher than this calculator?
We model: slabs + fixed charge + duty/cess. Real bills also include FPPCA (Fuel & Power Purchase Cost Adjustment, varies monthly), meter rent, time-of-day premium for AC use, and occasional one-time levies. Our number is base — actual is 10-20% higher typically.
Are tariffs same across a state's discoms?
Mostly yes within a state. Maharashtra has MSEDCL, Tata Power and Adani Electricity (Mumbai) — slightly different rates by area. Karnataka has BESCOM/MESCOM/HESCOM — tariffs are state-uniform.
Does solar net metering reduce my slab?
Yes. Net consumption (units drawn − units fed back) determines your slab. With rooftop solar, you can drop two slabs. Net metering settlement is monthly or annual per discom rules.