FESCO Bill Calculator 2026 – Estimate Your Bill Free

Worried your FESCO bill will be too high this month? You don't have to wait until it arrives. The FESCO Bill Calculator lets you estimate your total electricity bill in seconds — just enter the number of units you consumed, and the tool does the rest.

This free online tool uses the latest NEPRA-approved tariff slab rates and automatically includes all standard charges, including GST, Fuel Price Adjustment (FPA), fixed charges, and surcharges. Whether you're a home user or a shop owner, this guide covers everything you need to calculate and understand your FESCO electricity bill.

What Is the FESCO Bill Calculator and Why Do You Need It?

The FESCO Bill Calculator is a free online tool that estimates your monthly electricity bill based on the units you consumed. It applies the current NEPRA tariff slab rates to your units and automatically adds all the standard charges.

In simple words: you enter your units, and it shows you an estimated bill amount before FESCO officially sends it.

Why Should You Use It Every Month?

Most people are surprised when they receive a high electricity bill. The FESCO Bill Calculator helps you:

• Estimate your bill before the due date so there are no surprises
• Understand slab rates and see exactly how your units are charged
• Control your usage by checking how many more units would push you into a higher slab
• Catch billing errors by comparing your estimate to the printed bill
• Plan your budget, especially in summer when AC usage shoots up

What Information Do You Need to Use the Calculator?

You only need two things:

1. Number of units consumed — the difference between your current and previous meter reading. For example, if your current reading is 1,500 and last month was 1,380, your consumed units are 120.
2. Consumer type — whether you're a residential (protected/unprotected) or commercial consumer.

Optionally, you can also enter your FPA rate (from your last bill) and any previous arrears for a more accurate figure.

How to Find Your Consumed Units from the Meter

Look at your electricity meter and note the current reading. Then subtract the previous month's reading (printed on your last FESCO bill) from it. The result is your units consumed this month.

Example: Current reading 4,350 − Previous reading 4,210 = 140 units consumed

Not sure where your reading and reference number are printed? Our guide on how to check your FESCO bill by reference number shows you exactly where to look.

How to Use the FESCO Bill Calculator — Step by Step

FESCO Electricity Tariff Slab Rates 2026 — Complete Rate Chart

FESCO does not charge a single flat rate per unit. Instead, electricity is priced in slabs — the more units you use, the higher your per-unit rate becomes. Importantly, the rates are applied progressively: if you use 250 units, the first 100 are charged at the lowest rate, the next 100 at a higher rate, and the remaining 50 at the next rate.

Domestic — Lifeline Consumers (up to 100 units)

Domestic — Protected Consumers (≤200 units for 6 months)

Domestic — Unprotected Consumers (above 200 units)

Fixed Monthly Charges (Meter Rent)

In addition to unit charges, FESCO applies a fixed monthly customer charge regardless of how much electricity you use:

The Most Important Slab Boundary — the 200-Unit Warning

This is something most FESCO consumers don't know until it's too late.

If you cross 200 units, you lose your Protected consumer status and jump to Unprotected rates, which are nearly double. This single boundary causes the biggest bill shocks.

The lesson: if you're close to 200 units in any month, reduce usage immediately. Turn off one AC earlier, cut geyser use, or delay a washing-machine run. Staying under 200 units can save you thousands of rupees per month. Our guide on FESCO peak hours timing shows the cheapest hours to run heavy appliances.

What Other Charges Are Added to Your FESCO Bill?

The calculator adds these automatically, but here's what each one means. For a full breakdown, see our dedicated guide on FESCO bill taxes explained.

• Fuel Price Adjustment (FPA): A variable charge that changes monthly with fuel prices — usually Rs. 2–8 per unit. This is the main reason your bill changes even when your units don't.
• GST (General Sales Tax): 17%, applied to your electricity cost (including FPA).
• FC Surcharge: A fixed Rs. 0.43 per unit on all consumers except the lifeline (0–50 unit) category.
• Electricity Duty: A small provincial duty of roughly 1.5% of the energy cost.
• PTV Fee: A fixed Rs. 35 per month on every domestic bill.
• NJ Surcharge: A small per-unit charge that funds the Neelum-Jhelum hydro project.

FESCO Bill Calculation Example — How Your Bill Is Actually Calculated

Both examples below assume single-phase and an FPA of Rs. 3.00 per unit — plug the same numbers into the calculator above and you'll get the same result.

Example 1 — Domestic Consumer Using 100 Units (Protected)

Example 2 — Domestic Consumer Using 250 Units (Unprotected)

This shows how crossing from 200 to 250 units can more than quadruple your bill compared to a 100-unit Protected consumer.

Protected vs Unprotected Consumer — What's the Difference?

Who Is a Protected Consumer in FESCO?

A Protected consumer is a residential user who has consumed 200 units or fewer for the past 6 consecutive months. Protected consumers receive a government subsidy and pay significantly lower per-unit rates.

Who Is an Unprotected Consumer?

If you consume more than 200 units in any month, or haven't consistently stayed under 200 for 6 months, FESCO classifies you as Unprotected. You lose the subsidy and pay the higher rates.

How to Stay Protected and Save Money

• Monitor your units regularly, especially April to August when AC usage is highest
• Set your AC to 26°C — every degree lower increases consumption significantly
• Avoid heavy appliances (geyser, iron, washing machine) during evening peak hours
• Switch to LED bulbs — up to 80% less electricity than traditional bulbs
• If you're near 190–195 units mid-month, cut usage immediately to stay under 200

Why Does My FESCO Bill Change Every Month, Even with the Same Units?

This is one of the most common complaints from FESCO consumers. The real reasons:

• FPA changes monthly — a higher Fuel Price Adjustment raises your bill even at the same usage
• Quarterly Tariff Adjustment (QTA) — NEPRA revises tariffs every quarter
• Slab crossing — a few extra units can push you into a higher slab or from Protected to Unprotected
• Estimated meter reading — an estimated (not actual) reading can inflate one month and lower the next
• Arrears — any unpaid amount from earlier months is added to your current bill

If a bill looks wrong, you can download your duplicate bill to check the exact charges, or file a complaint online.

Frequently Asked Questions

Is the FESCO Bill Calculator 100% accurate?

No calculator gives an exact figure. The estimate may differ slightly from your actual bill due to FPA changes, prior-year adjustments, quarterly tariff revisions, and any outstanding dues. Use it as a close guide, not an exact figure.

Do I need to register or pay to use it?

No. The FESCO Bill Calculator is completely free — no login, no registration, and no hidden charges.

Can I use it on my mobile phone?

Yes. The calculator is fully mobile-friendly and works in any smartphone browser without downloading an app.

What is the minimum FESCO unit rate in 2026?

The lowest rate is Rs. 3.95 per unit for lifeline consumers using up to 50 units per month.

Why is my estimated bill different from the actual FESCO bill?

Differences usually come from FPA fluctuations, outstanding dues, late-payment surcharges, or prior-year adjustments the calculator doesn't include. Always confirm the exact amount on the official FESCO bill check page.

What happens if I go over 200 units?

You move from Protected to Unprotected status. Your per-unit rate nearly doubles and you lose the government subsidy — the single biggest cause of bill shock for FESCO consumers.

Final Words

Related Guides

• FESCO Bill Taxes Explained — GST, FPA & All Charges
• Check FESCO Bill by Reference Number Online
• FESCO Duplicate Bill — Download & Print Free
• FESCO Peak Hours Timing — Save Money on Electricity
• FESCO Bill Complaint Online — File & Track Easily
• How to Change Name on Electricity Bill in Pakistan
• FESCO Online Bill Check — Homepage