An IESCO bill calculator estimates your monthly electricity bill from three inputs: units consumed, your tariff category, and the current NEPRA rates. It exists for one reason — Pakistani bills are hard to predict by hand, and a surprise bill in August is a budgeting problem you could have seen coming in July.

How to Use This Calculator

1. Enter your units. Take today’s reading from your meter’s kWh screen and subtract last month’s final reading. Enter the difference — not the full meter display.
2. Pick your category. Lifeline, Protected, Un-Protected, or Commercial. It’s printed near the top of any old bill. Wrong category is the most common reason estimates come out wrong.
3. Calculate. The tool applies the current tariff slabs, then adds FPA, GST, electricity duty, fixed charges, and the TV fee — the same layers your official bill has.

What Is IESCO?

The Islamabad Electric Supply Company (IESCO) distributes electricity across northern Punjab and the federal capital. It was carved out of WAPDA when Pakistan’s power sector was restructured, and today it handles the distribution network, meter readings, and billing for its region. Among all DISCOs, IESCO consistently posts some of the best recovery rates and lowest line losses in the country. If you want the company’s full background, we’ve covered what IESCO stands for in Pakistan separately.

Areas served: Islamabad, Rawalpindi, Attock, Jhelum, and Chakwal. If your bill carries the IESCO logo, you’re in one of these five districts.

The WAPDA confusion, settled: WAPDA no longer bills anyone — it runs hydroelectric generation projects. IESCO handles your bill. People still search “WAPDA bill calculator IESCO” out of habit, and that habit is decades old, but the company on your bill is IESCO and this calculator uses its (NEPRA-notified) rates.

How the Calculation Works

The estimate is built the same way your official bill is:

1. Units × slab rates. Your units are split across the tariff slabs — cheaper rates for the first units, steeper rates as consumption grows.
2. FPA. The month’s Fuel Price Adjustment is added per unit. This figure changes monthly, which is why estimates and bills rarely match to the rupee.
3. Fixed charges. Un-protected, commercial, and industrial connections pay a monthly fixed fee based on sanctioned load.
4. Duties and taxes. Electricity duty on the energy cost, 18% GST on the taxable total, and the Rs. 35 TV fee on domestic accounts. [VERIFY]
5. Total. Everything is compiled into a line-by-line breakdown — read the lines, not just the total, because the lines tell you where to cut.

Want the current per-unit brackets in detail? See the IESCO tariff rates page.

Worked Examples on IESCO Rates

These use the current residential tariff — rerun them in the calculator above whenever NEPRA revises rates: [VERIFY all figures]

• 100 units (Protected): billed at the lowest base rate of Rs. 10.54 per unit. This is the cheapest electricity in the system.
• 200 units (Protected): the first 100 units at Rs. 10.54, the next 100 at Rs. 13.01. Notice the household is still protected — staying at 200, not crossing it, is the whole game.
• 500 units (Un-Protected): slab benefits are gone; the volume is billed at Rs. 38.95 plus a Rs. 500 monthly fixed charge. Compare this against the 200-unit case in the calculator — the difference is not 2.5x, it’s far worse.
• 1000 units: crossing 700 units triggers the top tier of Rs. 47.20 across consumption, plus a Rs. 675 fixed charge. At this level, the solar panel calculator is not optional reading.

For the mechanics behind these jumps — slab boundaries, protected status, FPA timing — our complete bill guide walks through each one with scenarios you can run yourself.

Protected vs Un-Protected: the 200-Unit Line

Cross 200 units once and you restart the six-month clock at un-protected rates. If your usage hovers near 200, read your meter around the 20th of each month — it’s the highest-value habit an IESCO consumer can have.

Commercial Connections

Shops, offices, and retail units are billed on commercial tariffs: a higher base rate (or Time-of-Use split registers above 5 kW sanctioned load), plus capacity-based fixed charges. Select the Commercial category in the calculator above for business estimates. What moves a commercial bill most: operating during evening peak hours on a ToU meter, and continuously running cooling. If your connection is three-phase, the IESCO peak and off-peak timings page shows the current windows.

Why Your Estimate Won’t Match the Bill Exactly

Four honest reasons: the month’s FPA (announced after the fact), arrears or instalments carried from previous bills, mid-cycle tariff changes, and the meter-reading date — a late reading stuffs extra days into one billing month and can push you into a higher slab through no fault of your own. The estimate’s job is to get you close and show the structure; the official bill is the binding figure. If your bill looks wrong rather than just different — units far above the same month last year — the IESCO complaint number page covers how to dispute a reading.

Quick Fixes for Common Calculator Mistakes

• Estimate absurdly high? You probably entered the meter’s full display instead of the monthly difference. Subtract last month’s reading first.
• Estimate lower than your bills usually are? Check your category — if you’ve crossed 200 units any time in the past six months, you’re un-protected, not protected.
• Numbers close but never exact? That gap is FPA and arrears. See the reasons above.

Check, Don’t Just Estimate

The calculator predicts; your actual bill is one lookup away. Use the IESCO online bill check (14-digit) with the reference number from any old bill, or pull a copy via IESCO duplicate bill check online if the paper bill went missing. Setting up a new property? The IESCO new connection guide covers the ENC process — and if you’re planning solar, registering net metering during the connection phase saves a second round of paperwork.

During outages, the IESCO load shedding schedule page tracks current timings.

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FAQ

Conclusion

Your IESCO bill is not random — it’s slabs, status, and adjustments, and all three are visible before the bill arrives if you look. Run your units through the calculator above once a month, watch the 200 and 300-unit boundaries, and the “bill shock” months stop being surprises. For everything beyond IESCO — reading the bill line by line, reduction tactics that save thousands, solar math — start with the complete guide on our main calculator page.