How Your Electricity Bill Is Calculated in Pakistan: Units, Slabs and Taxes (2026)

Every Pakistani household has had the month the bill arrived double and nobody could explain why. The explanation is almost never a mystery: an electricity bill is units consumed, priced by slab, then wrapped in a stack of adjustments and taxes that most people never read. Learn the anatomy once and you can audit any LESCO, GEPCO or other DISCO bill in five minutes — and catch the errors that are more common than anyone admits.

Units and slabs: the core charge

The core line is simple: units consumed multiplied by a rate. What complicates it is the slab system — consumption is billed in bands, where the first band of units costs one rate and each higher band costs more. The bands are revised through NEPRA determinations and government notifications, so today’s exact slabs should always be read off your own bill or your DISCO’s latest schedule rather than an old screenshot circulating on WhatsApp. The structural point never changes: the more units you consume, the more every additional unit costs. That is why two households using 300 and 320 units can see bills that differ far more than the raw 6–7% — the top units dragged the whole billing structure upward.

The add-ons around the core

Around that core sits a stack of lines worth knowing by name. The fuel price adjustment (FPA) passes monthly fuel-cost changes through to consumers and can swing a bill noticeably after an expensive fuel month. Electricity duty runs around one and a half percent of the usage charge. General sales tax at 18% applies to the taxable amount — and 18% of a large bill is not small change. Add the TV licence fee, meter rent for some categories, and the surcharges and financing-cost adjustments that come and go with notifications, and the difference between “units cost” and “bill payable” can easily reach a third of the total. None of these lines are optional, but all of them are readable — every bill lists them line by line, and every one of them deserves a glance before payment.

A worked example on 300 units

Here is the shape of it with round numbers. A household uses 300 units in a month at an average effective rate of Rs. 60 — slabs mean the real rate is a blend across bands, but the blended average works fine for estimation. The usage charge is 300 × 60 = Rs. 18,000. An 18% GST on the taxable portion of that adds about Rs. 3,240, and then electricity duty, any FPA for the month, and fixed charges stack on top according to that month’s notifications. The final payable lands well above the units cost — which is exactly the gap people find shocking, and exactly why reading the lines matters.

Audit your own bill

Reading the meter settles most disputes. Note the reading printed on the bill, compare it with the meter in front of you, and watch one full day of consumption if a reading looks impossible. Estimated bills — marked as estimates — are the classic error source: if the reading was estimated, the next actual reading trues it up, but you are entitled to submit a correct reading and have the bill revised rather than pay in advance and wait. Keep two months of bills side by side; a unit jump with no lifestyle change deserves a complaint to the DISCO before payment, not after it.

Cutting the bill structurally

Reduction beats dispute anyway. The slab structure means shaving the top units pays double: dropping from 320 to 290 units saves those units’ cost and may pull the whole bill into a cheaper band. Inverter ACs, LED lighting and phantom-load discipline move the needle within a single season. For a structural fix, run your numbers through the electricity bill estimator to see today’s picture, then the solar panel savings calculator to see what ending the dependence actually pays back — for most 400-plus unit households, the answer is uncomfortable for the utility and comfortable for you.