Electricity Bill Calculator Pakistan

Why a Few Extra Units Can Jump Your Bill by Thousands

Pakistani residential tariffs are non-telescopic — unlike a progressive/slab-wise system where only the units above a threshold cost more, IESCO (and every other ex-WAPDA DISCO, since NEPRA notifies one uniform schedule) bills your entire month's consumption at the rate of whichever slab your total falls into.

For an Unprotected residential consumer, 300 units at Rs 33.10/unit costs roughly Rs 12,320 in energy + fixed charges before duty/GST — but 301 units, crossing into the next slab at Rs 36.46/unit, jumps to roughly Rs 13,627. One extra unit adds over Rs 1,300, because the higher rate applies retroactively to all 301 units, not just the one that crossed the line.

How Protected / Unprotected / Lifeline Status Works

This isn't something you choose or that a single month's reading determines. Under the current tariff:

• Lifeline: 12-month average consumption ≤100 units — the lowest rates (Rs 3.95–7.74/unit), exempt from fixed charges, but no slab benefit if you exceed 50 units in a month.
• Protected: 6-month average consumption ≤200 units — subsidised rates (Rs 10.54–13.01/unit) with the benefit of one previous slab.
• Unprotected: everyone else — full tariff rates from Rs 22.44/unit up to Rs 47.20/unit above 700 units.

IESCO tracks your consumption history and prints your assigned category directly on your bill — this calculator can't work that out for you, so select whichever category actually appears on your bill.

What Else Gets Added to the Bill

• Fixed Charge: billed per kW of sanctioned load (residential Protected/Unprotected use the full load; Time-of-Use residential uses 50% of load; Commercial/Industrial/Agriculture kW-based tariffs use 25% of load or actual maximum demand, whichever is higher) — or a flat per-consumer amount for smaller commercial/industrial categories.
• FPA (Fuel Price Adjustment): a monthly per-unit true-up of actual vs. assumed fuel cost — can be negative (a credit) when fuel prices fall.
• QTA (Quarterly Tariff Adjustment): a separate quarterly true-up for capacity, O&M and other system costs, revised every three months.
• Electricity Duty: a provincial tax on the subtotal, typically around 1.5% but varies by province — check your bill for the exact figure.
• GST: 18% general sales tax applied to the subtotal.
• TV Fee: a flat PTV licence fee (commonly Rs 35) included on most domestic bills.

How to Use This Calculator

• Step 1 — Category: pick the exact category printed on your bill (Lifeline, Protected, Unprotected, Time-of-Use, Commercial, Industrial or Agriculture).
• Step 2 — Units: enter the kWh figure from your last meter reading.
• Step 3 — FPA: enter the Fuel Price Adjustment figure from your last bill — it changes monthly and can be negative.
• Step 4 — Fine-tune: open "Customize" to adjust GST, Electricity Duty, QTA or TV Fee if your bill shows different values.

The Slab Cliff in Numbers — Protected vs Unprotected

Estimated total bill (1 kW sanctioned load, default GST/duty/TV fee, FPA excluded) at each unit level:

*The Protected tariff table only defines slabs up to 200 units — a real Protected consumer averaging over 200 units for 6 months would be reclassified as Unprotected, so these rows are illustrative of the rate structure, not a realistic bill for that consumer. Notice the Unprotected jump from 300→301 units: about Rs 1,308 for one extra unit, purely from the slab-cliff mechanic.

Frequently Asked Questions