Last updated: 4 July 2026 · Rates reviewed after every NEPRA notification

FESCO Bill Calculator 2026 – Estimate Your Bill from Units

Enter the units shown on your meter and get an instant estimate of your FESCO electricity bill — energy cost, surcharge, duty, GST and PTV fee, all broken down line by line. Free, no signup, works on any phone.

This is an estimate. Your actual bill also carries the monthly Fuel Price Adjustment (FPA), quarterly adjustment, any arrears or installments, and TOU peak rates if you have a time-of-use meter — none of which can be known in advance. Use the estimate for planning; the printed bill is always final. To see your real issued bill, use the bill checker on our homepage.

How This Calculator Works

The calculator applies the same slab logic FESCO’s billing system uses. Your units are split across consumption slabs and each portion is charged at its own rate — the first 100 units at the lowest applicable rate, the next 100 at a higher one, and so on. On top of the energy cost it adds the Financing Cost (FC) surcharge per unit, Electricity Duty for the provincial government, General Sales Tax, and the flat PTV fee that appears on every domestic bill. The result table shows each line separately, so you can see exactly where the money goes instead of just a single mystery total.

Two automatic protections are built in. If you select Lifeline but enter more than 100 units, the tool recalculates on protected rates, because lifeline pricing legally applies only to very small consumers. If you select Protected but enter more than 200 units, it recalculates on unprotected rates — exactly what FESCO’s system would do, since crossing 200 units removes protected status.

How FESCO Actually Calculates a Bill

  1. Meter reading: the reader records your present reading; present minus previous equals the units billed.
  2. Slab pricing: units are priced slab by slab at NEPRA-notified rates for your category.
  3. Adjustments: the monthly FPA (positive or negative) and the quarterly tariff adjustment are applied to reflect real fuel and capacity costs.
  4. Duties and taxes: Electricity Duty, GST, the PTV fee and — on commercial or high-value bills — advance income tax are added.
  5. Balances: arrears, installments or subsidies from previous months adjust the final payable figure, and a separate higher amount is printed for payment after the due date.

Worked Example

Suppose an unprotected domestic consumer uses 300 units. The first 100 units bill at the lowest unprotected rate, the next 100 at the second slab, and the final 100 at the third slab. Add the FC surcharge on all 300 units, then duty, GST and the PTV fee, and the estimate lands in the range of roughly Rs 12,500–13,000 before FPA. Run the same numbers in the calculator above to see the exact line-by-line arithmetic at the current configured rates.

Reading the Result Wisely

  • Slab jumps are expensive. Going from 195 to 210 units doesn’t add “15 units of cost” — it can move the whole bill to unprotected pricing. Try both figures in the calculator and compare.
  • FPA swings both ways. Some months it adds to the bill, in cheaper-fuel months it subtracts. That is the main reason two identical consumption months can produce different bills.
  • TOU meters change the math. Peak-hour units carry a premium; the calculator assumes a single rate, so heavy peak users should expect their real bill somewhat higher than the estimate.

And if an issued bill is far above what the slabs justify, don’t just pay it — our FESCO helpline & complaint guide shows how to dispute a wrong reading before the due date.

Calculator FAQs

Why is my actual FESCO bill different from the estimate?
The estimate excludes the monthly Fuel Price Adjustment, quarterly adjustment, arrears, installments, subsidies and TOU peak pricing, because these vary month to month and per connection. The slab arithmetic itself matches FESCO’s method.
Which rates does this calculator use?
NEPRA-notified base slab rates for domestic consumers, reviewed after every notification. Rates change during the year, so treat the output as a close planning figure rather than a guaranteed amount.
Can I calculate a commercial or industrial bill here?
This version is tuned for domestic (A-1) connections, which cover the vast majority of consumers. Commercial and industrial tariffs use different structures, fixed charges and tax treatment, so their estimates would mislead more than help.
How do I find my units before the bill arrives?
Read your meter and subtract the “previous reading” printed on last month’s bill from the number on the display. Enter that difference as units — checking mid-month helps you stay under a slab boundary.
Does the calculator store what I type?
No. All calculation happens inside your own browser; nothing is sent to any server, stored or shared. You can even use it offline once the page has loaded.
What are protected and unprotected rates?
Stay at or below 200 units for six consecutive months and you are billed on cheaper protected slabs. Cross 200 units once and the next six months are billed on higher unprotected slabs — the single biggest cost trap for small households.