Peak Hours: Who Actually Pays More

Everyone repeats the 7-11 PM rule, but it only means anything for your bill if you're actually on a Time-of-Use meter — and most domestic connections in Pakistan aren't. The flat-rate A-1 tariff is what covers the vast majority of homes, and under it a unit costs identically whether you draw it at 8 AM or 8 PM. TOU pricing exists mainly for commercial (C2/C3) and industrial connections running three-phase meters at higher sanctioned loads, not for the average household.

Check the Tariff Code Before You Worry About the Clock

The fastest way to know is to look at your bill, not a wall clock. A tariff code reading A-1 or A-1(01)/A-1(02) means single-phase domestic flat-rate billing, full stop — the 7-11 PM window has no bearing on what you owe. A genuine TOU meter shows two separate numbers on the bill, 'peak units' and 'off-peak units,' instead of one combined consumption figure. One number on your bill means one rate applies to all of it.

A handful of newer smart-meter rollouts have started offering optional domestic TOU plans on specific feeders, but that's still a limited pilot, not something assigned to residential consumers by default.

For Those Actually on TOU: The Evening Window Is Where the Rate Bites

Commercial and industrial C2/C3 consumers on a TOU tariff pay their peak rate from 7:00 PM to 11:00 PM, when national demand peaks and the grid leans harder on costlier thermal generation to cover it. Everything from 11 PM to 7 PM the next day bills at the cheaper off-peak rate. For a business on this tariff, moving production runs, water pumps, or heavy machinery outside that four-hour block is the one lever that actually changes next month's total — it shows up as a smaller number specifically in the peak-units line.

Flat-Rate Bill or Not, the Window Still Matters

Skip TOU pricing entirely and the 7-11 PM window still carries a cost, just an indirect one: it's when load-shedding risk and voltage sag both climb across many feeders, because every household's AC, iron, and pump are pulling current at once. None of the following changes your per-unit rate on a flat tariff — but it eases the load on your local transformer, which is worth something on its own.

• Pre-cool rooms before 7 PM so the compressor isn't working as hard during the evening surge
• Move ironing and laundry to the morning or early afternoon
• Put water pumps and geysers on timers set to avoid the 7-11 PM block
• Charge UPS batteries during daylight hours when grid load is lighter

Confirm Your Own Tariff Code

Your reference number pulls up the official bill, tariff code included, so you can settle this in under a minute rather than guessing from the 7-11 PM rule of thumb. Running a shop, workshop, or small factory and wondering whether a TOU commercial tariff would actually save you money? Ask your DISCO's commercial office for a load and usage-pattern review before applying — switching usually means a meter change, so it's worth confirming the math first.