Every couple of months, the same message shows up in our inbox: “My bill was normal last month, why did it suddenly double?” It’s one of the most common questions we get across every DISCO — LESCO, MEPCO, PESCO, you name it — and in almost every case, the answer isn’t a mistake. It’s one of a handful of predictable reasons. Here’s what’s actually going on.
1. You Crossed the 200-Unit Line
This is, by far, the most common cause of a sudden jump. Pakistan’s domestic electricity tariff treats consumers up to 200 units a month as “protected,” billed at a lower, subsidized rate. Go even slightly over that — say from 195 to 210 units — and your entire month’s bill can be reclassified as “non-protected,” charged at a noticeably higher rate.
The frustrating part is that people expect the increase to apply only to the extra units. It usually doesn’t work that way. A small rise in usage near that 200-unit mark can mean a disproportionately large rise in your total bill. If your usage tends to hover close to that line, it’s worth tracking your meter reading mid-month so you’re not caught off guard.
We go into this in more detail, including how the slab system is structured, in our guide on electricity tariff slabs in Pakistan.
2. Fuel Price Adjustment (FPA)
Even if your consumption is identical to last month, your bill can still change because of the Fuel Price Adjustment — a monthly charge (or occasionally a credit) that reflects the actual cost of fuel used to generate electricity that month. It’s set at the national level, not by your DISCO, and it can shift by a few rupees per unit from one billing cycle to the next. NEPRA publishes these adjustments through its official notifications, which you can check on the NEPRA website if you want to see the current rate for yourself.
3. Seasonal Usage — Especially Air Conditioning
This one’s obvious once you think about it, but it still catches people off guard every summer. Air conditioners are, by a wide margin, the heaviest electricity users in most Pakistani households — running one unit for several hours a day can easily push a household from the protected slab into the non-protected one within a single billing cycle. If your bill spikes specifically in the summer months and drops again in winter, this is almost certainly your answer.
4. An Estimated Reading
If the meter reader couldn’t access your meter that month — a locked gate, no one home, a meter in an inconvenient spot — your DISCO may issue a bill based on an estimated reading rather than an actual one. Estimated bills are sometimes higher than your real usage, and they typically get corrected (up or down) once an actual reading is taken the following month. If your bill mentions “estimated” anywhere, don’t panic — check the next cycle before assuming something’s wrong.
5. A Change in Sanctioned Load vs. Actual Usage
Every connection has a “sanctioned load” — essentially the maximum load your connection is approved for. If your actual usage regularly exceeds that sanctioned load (common when households add air conditioners, additional appliances, or even a small business setup without updating their load), you can be billed extra load charges on top of your normal consumption. This is different from a meter fault — it’s a mismatch between what your connection is registered for and what you’re actually using.
6. A Genuine Meter Fault
Less common than the reasons above, but it does happen. A meter that’s running fast, stuck, or otherwise malfunctioning can produce a reading that doesn’t match your real usage. If your bill looks wildly inconsistent with your actual appliance use — for example, no major change in your household but a bill that’s 2-3x higher — a meter fault is worth ruling out. You can request an inspection through your DISCO’s complaint line; we’ve listed direct complaint numbers on our individual company guides, including LESCO and MEPCO.
7. Missed Payment Surcharges Carried Forward
If a previous bill went unpaid past its due date, a late payment surcharge is added — and if it wasn’t cleared, it can carry into the next bill along with the new charges, making the total look far higher than your actual monthly usage would suggest. Checking your bill’s “arrears” or “previous balance” line will usually confirm whether this is what happened.
How to Actually Check What Changed
Rather than guessing, the fastest way to find your specific answer is to look at your bill’s breakdown side by side with last month’s:
- Compare units consumed first — this rules in or out simple usage increase.
- Check whether your total crossed 200 units, which affects your tariff category.
- Look for the word “estimated” next to your reading.
- Check the arrears/previous balance line for carried-over amounts.
If you haven’t already, our guide on how to understand your electricity bill in Pakistan walks through every section of a typical bill, which makes this comparison a lot easier.
You can check your current bill directly, for any major DISCO, through our online bill checker.
Frequently Asked Questions
Can I get my bill corrected if it was based on an estimated reading? Yes — estimated readings are typically adjusted automatically once an actual meter reading is taken the following cycle. If the correction doesn’t happen, you can raise it with your DISCO’s complaint line.
Does using an AC really make that big a difference? Yes. Air conditioners are among the highest-consumption appliances in a typical home, and running one regularly is one of the fastest ways to push your usage into a higher tariff slab.
Who decides the Fuel Price Adjustment amount? FPA is determined at the national level based on actual fuel costs and applies uniformly — it isn’t something your local DISCO sets on its own.
What should I do if none of these reasons explain my bill? If you’ve checked units consumed, tariff category, estimated-reading flags, and arrears, and the bill still doesn’t make sense, it’s worth requesting a formal review or meter inspection through your DISCO’s complaint channel rather than assuming it will resolve on its own.
This article is intended for general informational purposes to help consumers understand common billing patterns. OnlineBill.pk is an independent platform and is not affiliated with NEPRA or any electricity distribution company — for account-specific issues, always contact your provider directly.
Khurram Shahzad has 5+ years of experience working on electricity billing websites in Pakistan. He is passionate about helping people understand their electricity bills, find ways to reduce them, and access official complaint and payment services without hassle. Through OnlineBill.pk, he aims to make electricity bill information accessible to every household in Pakistan.