LESCO Bill Calculator – Slab Rates, Protected & 3-Phase
Enter the units on your meter and this calculator returns an estimated LESCO bill: energy charges worked out slab by slab, fixed charges for your slab, fuel price adjustment, electricity duty, GST at 18%, and the TV licence fee. It handles protected and non-protected domestic rates, three-phase peak and off-peak metering, and commercial connections. Rates follow the uniform tariff NEPRA notified for FY 2025-26.
Where to get the units figure
Two ways, depending on whether you want a past bill or the month in progress.
From a bill: the Units field in the Meter Info block. Use that and the calculator will closely track what you were charged.
From the meter, mid-month: read the display today, subtract the Present Reading from your last bill, and that is your consumption so far. If the MF on your bill is not 1, multiply the difference by it. Doing this around the 15th is the point — you still have two weeks to change the outcome. To pull your latest reading, check your bill first.
Which rates apply to you
Your per-unit rate depends on a category, not just a number.
Protected domestic consumers have averaged 200 units or less across the last six billing cycles. Lifeline covers the lowest usage, assessed over twelve months. Everyone else is non-protected, and new connections start there by default — protected status is earned through billing history, not applied for.
The gap is large enough to matter more than any habit change:
| Slab | Protected | Non-protected |
|---|---|---|
| 1–100 units | Rs 10.54 | Rs 22.44 |
| 101–200 units | Rs 13.01 | Rs 28.91 |
At 150 units, a protected consumer pays roughly Rs 1,705 in energy charges; a non-protected consumer pays roughly Rs 3,690 for identical consumption.
Above 200 units the non-protected ladder continues, and fixed monthly charges enter from the 301-unit slab upward:
| Slab | Rate | Fixed charge |
|---|---|---|
| 201–300 | Rs 33.10 | — |
| 301–400 | Rs 37.99 | Rs 200 |
| 401–500 | Rs 40.20 | Rs 400 |
| 501–600 | Rs 41.62 | Rs 600 |
| 601–700 | Rs 42.76 | Rs 800 |
| Above 700 | Rs 47.69 | Rs 1,000 |
Lifeline sits well below all of it: Rs 3.95 up to 50 units, Rs 7.74 from 51 to 100.
Three-phase and time-of-use connections
If your meter number starts 3-P and your tariff code ends in T, your units split into two priced registers rather than one. Residential time-of-use runs at Rs 46.85 for peak units and Rs 40.53 off-peak, with a Rs 1,000 monthly fixed charge.
Switch the calculator to three-phase and it asks for both figures separately. Take them from the two rows in your Meter Info block — one row is the peak register, the other off-peak. Entering a combined total on a time-of-use connection will understate the bill, because peak units cost roughly 15% more than off-peak.
Commercial connections are calculated on a flat rate rather than slabs.
What the calculator adds on top
Energy charges are usually about two thirds of the final figure. The rest:
- Fuel price adjustment — a per-unit amount NEPRA notifies monthly, and the reason two identical months produce different bills. Enter the FPA rate from your last bill; through 2026 it has ranged from roughly Rs 1.91 to Rs 6.80 per unit.
- Surcharge — a per-unit levy, raised substantially during 2026 from its long-standing Rs 0.43.
- Electricity duty at 1.5% of energy charges
- GST at 18%
- TV licence fee — Rs 35 flat
Quarterly tariff adjustment can move either way. When NEPRA notifies relief, it lands as a credit rather than a charge.
Why the estimate will not match your bill exactly
Three reasons, all of them normal.
- Arrears and instalments sit outside the calculation entirely. If you carry unpaid amounts, your payable figure will be far higher than any estimate of this month’s electricity. Subtract arrears from the total before comparing.
- FPA is charged against an earlier month. Your bill applies the adjustment to units you used roughly two cycles ago, not the units you are entering here. Using last bill’s FPA rate is the closest available approximation, not a match.
- Rates move. The base tariff changes when NEPRA notifies a revision, FPA changes monthly, and quarterly adjustments arrive on their own schedule. Treat the output as a planning figure — accurate enough to tell you whether you are heading past 200 units, not precise enough to dispute a charge with.
Estimating before the meter tells you
If you want to plan rather than measure, work forward from appliances. Multiply wattage by hours used per day, divide by 1,000, and multiply by days in the month.
A 1.5-ton inverter air conditioner running six hours a day accounts for a large share of a Lahore summer bill on its own. A conventional ceiling fan running eighteen hours draws close to double a modern DC fan over the same period. Neither figure is precise for your household, but both are usually enough to explain where the units went.