Pakistan Electricity Slab Rates Explained with Examples

Pakistan's domestic electricity tariff is not a flat rate — it's a staircase. The more units you consume in a month, the higher the rate you pay on the units above each threshold. This progressive structure is called a slab tariff, and understanding exactly how it works is the single most useful thing you can learn about your electricity bill.

The system is designed to protect low-usage households while charging heavy users progressively more. But the math is counterintuitive: a small increase in usage that pushes you across a slab boundary can produce a disproportionately large jump in your bill. This guide explains why — with examples.

What Is a Tariff Slab?

A tariff slab is a consumption band with its own per-unit rate. NEPRA (the National Electric Power Regulatory Authority) sets these rates and reviews them periodically. For domestic (A-1 tariff category) consumers, the slab ladder currently runs from a protected lifeline rate for very low users all the way to the highest rate for consumers who exceed several hundred units in a single billing cycle.

The key principle: the slab rate applies to the units within each band, not to all your units once you cross a threshold. However, NEPRA's current domestic tariff design means that crossing from one major band to the next changes the rate applied to the entire bill — not just the extra units. This is the 'slab jump penalty' that catches many consumers off guard.

Protected vs Unprotected Consumers

Before the slab ladder begins, there is an important distinction: protected (subsidized) versus unprotected consumers. A domestic consumer who has consumed 50 units or fewer every month for at least six consecutive months qualifies as a 'lifeline' consumer and pays a heavily subsidized rate. These consumers are entirely exempt from FPA, GST, and most surcharges.

Once a consumer uses more than 50 units in any single month, they lose lifeline status for that cycle and are billed under the standard domestic slab structure. The transition from lifeline to standard billing is one of the most significant jumps in per-unit cost in the entire tariff schedule.

How the Slab Structure Works — A Worked Example

Consider two households. Household A uses 195 units in July; Household B uses 205 units — just 10 units more. At the slab boundary between the first and second major band, those 10 extra units do not just add a small amount: they can move the entire bill into a higher rate category, meaning every unit in the bill is repriced at the higher rate. The result is that Household B's bill can be 15–25% higher even though their actual consumption was barely different.

This non-linearity is intentional: it creates a strong incentive to stay below the next threshold. If you can reduce your monthly units by even 20–30 units during a billing cycle, the savings may be far larger than a linear calculation would suggest.

• Units 1–100 (approx.): lowest domestic rate, designed for minimal essential use
• Units 101–200: moderate rate, typical for households with fans, lights, and a small fridge
• Units 201–300: higher rate, where one AC running a few hours per day puts most households
• Units 301–700: premium rate, summer billing territory for most urban households
• Above 700 units: highest domestic rate, applies to very heavy consumers

Seasonal Bills and Slab Sensitivity

The slab structure interacts with seasonal usage in a particularly painful way. A household that uses 180 units in January may use 420 units in June due to air conditioning. Not only are 240 extra units added, but all 420 units are billed at the higher slab rate — meaning the June bill is not just 2.3× the January bill, it can be 3–4× higher because of slab repricing.

This is why summer electricity bills in Pakistan feel disproportionately large relative to actual usage increases. If you can keep your June consumption below a slab boundary — say, below 300 units instead of 350 — the savings on your total bill are significantly larger than the cost of those 50 units alone.

FPA, GST, and Surcharges on Top of Slabs

The slab tariff only determines your energy charge. On top of that comes the Fuel Price Adjustment (FPA), which varies month to month based on generation costs. Then GST (currently 18% on the taxable value), the Electricity Duty, a Tariff Rationalisation Surcharge, a TV licence fee, and — for some connections — meter rent. Each of these is calculated on the base energy charge, the FPA, or both.

The combined effect is that your actual per-unit cost is typically 20–40% higher than the bare slab rate alone. This is why comparing your bill's total to a simple 'units × rate' calculation rarely gives the right answer: the additional charges compound on top of the already non-linear slab structure.

How to Use This Information to Lower Your Bill

The most powerful lever is awareness of where you sit in the slab ladder at the mid-point of your billing cycle. If a meter reading on the 15th of the month shows you at 180 units and your typical month ends near 280, you know you will cross into the next slab. Cutting usage for the remaining 15 days — by raising the AC temperature a few degrees, deferring laundry, or reducing overnight standby — can keep you below the threshold and save a disproportionate amount.

Use our monthly usage estimator to project where your cycle is heading from two meter readings taken a week apart. Check your actual slab position using the duplicate bill tool — the bill itself shows your tariff category and the units consumed, which together tell you exactly which slab your charges were calculated at.