Plain-English guides to understanding your electricity bill — from how kWh and units are measured to how tiered slab rates, fixed charges, and taxes shape what you pay each month.
Your electricity bill is calculated from how much energy you use (measured in kilowatt-hours, or units), the rate your utility charges for each tier of usage, and any fixed charges, surcharges, and taxes that apply to your connection.
One unit of electricity equals exactly one kilowatt-hour (1 kWh). Running a 1,000-watt appliance for one hour consumes 1 unit. Your meter reading tracks total units consumed, and the difference between two readings gives your usage for the billing period.
Many utilities use tiered pricing, where the rate per kWh rises as your usage crosses certain thresholds. For example, the first 200 units might be charged at a lower rate, while everything above that is priced higher. This is why two households with different usage can pay very different effective rates per unit.
Beyond energy charges, bills often include fixed charges (a monthly fee regardless of usage), meter rent, fuel adjustment charges (FAC) per unit, and electricity duty (a percentage of energy plus fixed charges). These vary by state, utility, and connection type (domestic or commercial).
Multiply the units consumed in each slab by that slab's rate, add up the energy charges, then add fixed charges, meter rent, fuel surcharges, and applicable taxes. Our calculators do this tier-by-tier for your state so you get an accurate estimate before your bill arrives.
Disclaimer: Guides are for informational purposes only. Actual billing varies by utility company, rate changes, seasonal adjustments, and local taxes. Always verify with your local utility provider before making financial decisions.