LESCO Bill Calculator – Estimate Your Electricity Bill

A LESCO bill calculator estimates your monthly electricity cost by applying NEPRA’s approved per-unit tariff to your consumed units, then adding fixed charges, the monthly Fuel Price Adjustment, and GST. It won’t match your final bill exactly — FPA changes every month — but it gets you close enough to budget with confidence.

Who actually sets the rate?

LESCO doesn’t decide what you pay. NEPRA (National Electric Power Regulatory Authority) sets every tariff, and LESCO simply bills accordingly. That’s why every distribution company — MEPCO, FESCO, IESCO, GEPCO — follows the same base structure with only minor local variation in fixed charges.

The February 2026 change most guides missed

NEPRA restructured the domestic tariff this year. Previously, your bill was driven almost entirely by per-unit slab rates. Now it’s a two-part tariff: a fixed monthly charge based on your sanctioned load (the kW capacity approved when your meter connection was first set up), plus the usual variable charge per unit. Lifeline consumers using around 100 units a month stay exempt from this fixed component; consumers in the 101–200 unit range see a smaller version of it added in.

Protected status isn’t a simple slab — it’s a threshold

This is where most calculators mislead people. Slabs mean you pay progressively more per unit as consumption rises within your category. Protected status is different — it’s a six-month rolling average. Stay at or under 200 units for six consecutive cycles and you qualify for subsidised rates. Cross 200 units in even one month, and that entire month can be billed at non-protected rates, not just the units above 200. That’s why a jump from, say, 195 to 210 units can look disproportionate on paper — it isn’t a calculator bug, it’s how the classification works.

What actually sits on top of the energy charge

Once your base energy charge is worked out, three more things get added:

• Fixed charge — tied to your sanctioned load, billed every cycle regardless of usage.
• FPA (Fuel Price Adjustment) — moves monthly with international fuel and gas prices. It’s the single biggest reason your calculator estimate and your real bill won’t match exactly.
• GST and Electricity Duty — statutory taxes applied on top, not part of NEPRA’s energy tariff itself.

Using the calculator properly

Know your consumed units first — current meter reading minus last reading, or the figure from your last issued statement. Select your connection type (domestic, commercial, industrial or agricultural) and your phase (single or three-phase), since fixed charges differ between them. If you’re on a three-phase connection with a Time-of-Use meter, note that peak-hour units are billed noticeably higher than off-peak — shifting heavy appliances like geysers or water pumps to late-night hours genuinely reduces your effective rate.

Why the estimate and your real bill differ

Even a well-built calculator can’t predict FPA before NEPRA notifies it for that month, and it can’t account for arrears, late payment surcharges, or one-off adjustments. Treat the output as a planning figure — then check it against your actual issued statement once it’s available to see how close the FPA-adjusted total landed.

Where to verify rates yourself

Tariff numbers change with NEPRA notifications throughout the year, so any rupee figure printed today can be outdated within months. Always cross-check current per-unit rates directly at nepra.org.pk before making any financial decision based on them.