How to calculate your electricity bill in Pakistan
Your electricity bill starts with units: this month's meter reading minus last month's. Those units are priced by the residential tariff - protected homes pay low rates with the benefit of the previous slab, unprotected homes pay one slab rate on every unit - plus a fixed charge per kilowatt of sanctioned load, with fuel adjustments and taxes added on top.
The short version
- Find your units. Current reading minus previous reading. 12,600 − 12,450 = 150 units.
- Check whether you are protected. Protected means 200 units or fewer in each of the last six months.
- Find the slab you land in. 150 units is in the 101-200 slab.
- Price the units. Unprotected: all units at the landing slab's rate. Protected: the first 100 at the 1-100 rate and the rest at the 101-200 rate.
- Add the fixed charge. Sanctioned load in kW × the slab's fixed rate. Taxes and adjustments come on top.
Skip the arithmetic. The free Electricity Bill Calculator Pakistan does this for you, shows the formula and the working with your own numbers, and runs in your browser - nothing you type is uploaded. Also useful: Unit Converter, Percentage Calculator.
The 2026 residential slabs
Under S.R.O. 279(I)/2026 (NEPRA's decision of 11 February 2026), residential connections below 5 kW pay these energy rates per unit, plus a fixed charge per kW each month:
| Units | Protected | Unprotected |
|---|---|---|
| 1 - 100 | 10.54 | 22.44 |
| 101 - 200 | 13.01 | 28.91 |
| 201 - 300 | - | 33.10 |
| 301 - 400 | - | 36.46 |
| 401 - 500 | - | 38.95 |
| 501 - 600 | - | 40.22 |
| 601 - 700 | - | 41.85 |
| Above 700 | - | 47.20 |
Fixed charges run from Rs 200 to Rs 300 per kW for protected homes and from Rs 275 to Rs 675 per kW for unprotected homes, depending on the slab.
Worked examples
- 150 units, protected, 1 kW: 100 × 10.54 + 50 × 13.01 = 1,704.50, plus 300 fixed = Rs 2,004.50.
- 150 units, unprotected, 2 kW: 150 × 28.91 = 4,336.50, plus 600 fixed = Rs 4,936.50.
- 200 vs 201 units, unprotected, 2 kW: 200 × 28.91 + 600 = Rs 6,382, but 201 × 33.10 + 700 = Rs 7,353.10. One extra unit costs almost Rs 1,000 because every unit moves to the higher rate.
Units from your appliances
One unit is one kilowatt-hour. Units = watts × hours a day × days ÷ 1,000. A 1,500 W air conditioner running 8 hours a day for 30 days uses 360 units on its own; three 100 W fans for 10 hours a day add 90. Fridges cycle on and off, so count about a third of the day for them. Adding up your appliances shows which ones push you over a slab.
Why the real bill is higher
The printed bill adds items this method leaves out: the monthly fuel price adjustment, quarterly adjustments, sales tax, electricity duty and other charges. Use the slab calculation to compare months and plan usage, and the bill itself for the amount to pay.