If your electricity bill keeps surprising you, the culprit is almost never the meter — it is the slab system.
Most people learn the formula once in school and never touch it again — until life forces them to. If your electricity bill keeps surprising you, the culprit is almost never the meter — it is the slab system.
Bill = (units × slab rate) + fuel adjustment + taxes + fixed charges
NEPRA divides consumption into tiers (e.g. 1–100, 101–200, 201–300 units). Each tier has its own rate. The higher you climb, the more per unit.
Households consistently under 200 units enjoy a heavily subsidised rate. One month over the limit pushes you into the unprotected category for the next six months.
Charged a month or two in arrears to recover the actual fuel cost of generation. Sometimes it doubles your line-item bill.
Phantom loads (chargers, set-top boxes), AC thermostat (each degree cooler ≈ 6% more usage), tube-light to LED, water-heater on a timer.
Why is my bill higher than my neighbour's? Different connection type (single-phase vs three-phase), tariff slab, or someone is tapping your line. Compare meter reading to bill kWh.
Are solar net-metering savings real? Yes — but payback in Pakistan averages 3–5 years. The math hinges on net-metering tariff and panel quality.
Bookmark the calculator linked above — you will need it more often than you think. Try the How Your Electricity Bill Is Calculated linked above to put these numbers to work right now.