IESCO Bill Calculator 2026 – Instant Unit-Wise Estimate

An IESCO bill calculator estimates your monthly electricity charges by applying NEPRA’s notified domestic tariff to the units you’ve consumed, then adding fixed charges, fuel price adjustment, electricity duty, GST, and the PTV fee on top. Enter your units and sanctioned load below, and it works out a slab-accurate estimate in seconds — before your actual bill is even generated.

Why your number won’t match the bill to the rupee

Two inputs decide almost everything: total units and whether you’re a protected or non-protected consumer. NEPRA draws that line at 200 units a month — but it’s not just about this month’s reading. Your status is judged on your average usage across the last six billing cycles, and having an AC registered on the meter removes protected status regardless of how little you use.

The gap between the two categories is steep. A protected consumer at 200 units pays roughly Rs 13/unit. A non-protected consumer using the same 200 units pays close to Rs 29/unit — because once you cross into a higher slab, the entire month’s consumption is billed at that slab’s rate, not just the units above the line. Going from 199 to 210 units doesn’t add a small amount to your bill; it can nearly double it.

Fixed charges follow a separate logic. For non-protected connections, IESCO charges per kW of sanctioned load, not a flat fee — so two households using identical units but different load sizes end up with different totals. That’s why the calculator asks for load and phase, not just units.

What actually gets added on top

Energy charges are the base. FPA (Fuel Price Adjustment) is layered over that and changes every single billing cycle based on actual fuel costs, so no calculator — including this one — can lock in a permanent FPA figure; it has to be entered fresh each month. Electricity duty and GST apply after that, and lifeline consumers using 50 units or less are exempt from GST, which most bill estimators skip entirely. A flat PTV license fee closes out the total.

None of this includes arrears, reconnection charges, or late payment surcharge, which only appear if they apply to your specific account. If you want to see what’s actually posted to your account, run your reference number through IESCO’s bill check rather than relying on an estimate alone.

Lifeline vs. protected vs. non-protected

These three get mixed up constantly. Lifeline is the narrowest band — registered consumers using 50 units or fewer, paying close to Rs 4/unit with no fixed charge and no GST. General protected consumers (up to 200 units, no AC, under 5kW load) pay a higher but still subsidised rate with a small fixed charge. Everyone else — AC on the meter, above 200 units, or above 5kW sanctioned load — is non-protected, and stays that way for the following six-month window even if usage drops afterward.

Sanctioned load matters more than people assume

Your sanctioned load isn’t just a number on the meter approval letter — it directly multiplies your fixed charge if you’re non-protected. Households often carry a higher sanctioned load than they use, inflating the fixed portion of the bill without any change in consumption. If your load looks mismatched with your actual usage, it’s worth reviewing before you finalise a new IESCO connection or request a load revision — it changes the math every month after.

What this estimate is for

Treat the number as a planning figure, not a guarantee. It’s built for comparing scenarios — what happens if you add an AC, what changes if you shave 15 units off next month, what a load reduction actually saves you — using the same slab logic NEPRA applies, kept current with each tariff revision.