How to Calculate Your Electricity Bill Yourself

Most Pakistani consumers simply pay whatever is printed on the bill without checking whether the calculation is correct. But with a few numbers and the current tariff schedule, you can verify the key line items yourself in under ten minutes — and catch errors before they become arrears disputes.

Step 1: Find Your Units Consumed

Units consumed is the starting point for every calculation. On your bill it is listed as the difference between the current meter reading and the previous reading. One unit = 1 kWh (kilowatt-hour). If your current reading is 4,580 and the previous was 4,330, you consumed 250 units this month.

To double-check, read your physical meter today and subtract the 'previous reading' on your bill. The result should approximate your consumed units so far this billing period (not a perfect match since the billing cycle ended on the meter-read date, not today, but a large mismatch warrants a call to your DISCO).

Step 2: Identify Your Tariff Category

Your tariff category is printed on the bill — most households are A-1(01) (domestic protected) or A-1(02) (domestic unprotected). The category determines which slab rates apply to your units. NEPRA publishes the current applicable rates for each category on its website (nepra.org.pk) under tariff determinations — always use the most current published rates since these are revised periodically.

Step 3: Apply the Slab Rates to Your Units

Pakistan's domestic tariff applies progressively — each slab has its own per-unit rate. For a consumer using 250 units in a month under A-1(02) unprotected rates (using illustrative 2026 rate bands):

• Units 1–100: charged at the lowest slab rate (e.g., Rs. 10.50/unit) → Rs. 1,050
• Units 101–200: charged at the next slab rate (e.g., Rs. 17.50/unit) → Rs. 1,750
• Units 201–250: charged at the 201–300 slab rate (e.g., Rs. 26.00/unit) → Rs. 1,300
• Total energy charges: Rs. 1,050 + Rs. 1,750 + Rs. 1,300 = Rs. 4,100
• Note: use the actual NEPRA-published rates for your category; the figures above are illustrative

Step 4: Add FPA (Fuel Price Adjustment)

FPA is a per-unit monthly surcharge approved by NEPRA. Each month's FPA rate is announced and published (usually in PKR per kWh). Multiply the FPA rate by your total units consumed. If the FPA rate is Rs. 2.80/unit and you consumed 250 units: FPA = 250 × Rs. 2.80 = Rs. 700. Protected consumers (A-1(01)) are generally exempt from FPA on the first 50 units.

Step 5: Add Fixed Charges and Surcharges

On top of energy charges and FPA, several fixed and percentage-based items appear on every Pakistani electricity bill:

• Meter rent: a small fixed monthly fee (typically Rs. 15–35 depending on meter type)
• GST (General Sales Tax): a percentage of energy charges + FPA (rate set by the federal government)
• Electricity Duty: a provincial levy, percentage of energy charges
• PTV Fee: a flat per-month fee (currently Rs. 35 for domestic consumers)
• Financing Cost (FC) Surcharge: per-unit charge (multiply by your units consumed)
• Tariff Rationalization (TR) Surcharge: per-unit charge (multiply by your units)
• Late Payment Surcharge (LPS): a percentage applied if you pay after the due date (avoid this)

Step 6: Total It Up and Compare

Add all components: energy charges + FPA + meter rent + GST + electricity duty + PTV fee + FC surcharge + TR surcharge = your expected bill total. Compare this with the amount on your actual bill from CheckBills.net. A discrepancy of a few rupees is normal (rounding, tiny fixed charges); a discrepancy of hundreds of rupees warrants a closer look at each line item and possibly a call to your DISCO.

The most common source of errors is FPA applied to units that should be FPA-exempt (protected consumers' first 50 units), slab-rate miscoding (wrong tariff category), and estimated readings that are higher than actual usage. Having the calculation in hand gives you a concrete basis for a complaint if something does not add up.