Electricity Bill Calculator — NEPRA Slab Rates
Pakistani electricity bills are slab-priced: each block of units costs more than the last, which is why a 350-unit month can cost more than double a 250-unit month. This tool walks your units through the current NEPRA domestic slabs, adds duty, GST, and the PTV fee, and shows the line-by-line build-up the printed bill compresses.
Why did my electricity bill double when my units only went up 30 percent?
Slab escalation. Crossing from the 300-unit slab into the 400-unit slab reprices the marginal units at a much higher rate, and crossing 200 units can cost you protected status entirely — repricing every unit, not just the extra ones. Small consumption changes around slab boundaries produce outsized bill swings.
What is a protected consumer on a Pakistani electricity bill?
A domestic connection that has stayed at or below 200 units for the previous six consecutive months. Protected consumers get heavily subsidised rates on their first 200 units. One month above 200 forfeits the status, and rebuilding it takes another six low-consumption months.
Which charges sit on top of the per-unit energy cost?
Electricity duty (1.5 percent of energy cost), GST at 18 percent, the Rs. 35 PTV licence fee, and — variably — FPA (fuel price adjustment) and QTA (quarterly tariff adjustment), which this estimator excludes because they change monthly and can be negative.
Electricity Bill Calculator
How the slab system actually prices your units
The slab table is marginal, like income tax: your first 100 units bill at the lowest rate, the next 100 at the second rate, and so on. Nobody pays a single flat rate — the "rate" people quote from their bill is an average across slabs. This is also why the jump from 300 to 400 monthly units hurts so much: those hundred extra units all land in a slab priced near the top of the table, and they can drag the protected/non-protected determination with them.
The protected-consumer rule is the single most financially consequential line in the domestic tariff. Two households using identical 190-unit months pay very different bills if one of them spiked to 210 units four months ago — the spiker lost protection and now pays non-protected rates on everything while rebuilding the six-month history.
Using the estimate: budgeting, audits, and dispute prep
The most practical use of this tool is the mid-month check: read your meter, subtract last month’s closing reading from the bill, and run the difference here. If the projection alarms you, half the month remains to change behaviour. The second use is bill auditing — when the printed total diverges wildly from the structural estimate plus the printed FPA/QTA lines, you have the numbers to file a meter-reading complaint with your DISCO rather than a vague objection.
More questions answered
Almost always FPA and QTA — the monthly fuel and quarterly tariff adjustments NEPRA notifies after the fact. These can add Rs. 2–7 per unit in a bad month. The calculator shows the base structure; the adjustments ride on top and are printed as separate lines on the bill.
Base NEPRA slabs are uniform nationally, but K-Electric runs its own tariff determinations that diverge in adjustment charges, and each DISCO’s FPA differs. The structure here matches all DISCOs; the adjustment layer is where bills diverge by region.
Track units mid-month: most meters show a cumulative reading you can photograph on the 1st and 15th. If you’re tracking toward a boundary — especially the 200-unit protected threshold — shifting AC hours, delaying laundry to next month, or running heavy loads on solar hours can hold the line.
Yes — the Rs. 35 fee is collected through electricity bills by law regardless of TV ownership. Court challenges have come and gone; as of 2026 it remains on every domestic bill.
It models domestic single-phase tariffs. Commercial, industrial, and agricultural tariffs use different slab tables and fixed charges — a commercial estimate from this tool will undershoot meaningfully.