How Electricity Slab System Works in Pakistan
Pakistan uses a progressive slab system — the more units you consume, the higher the per-unit rate. Crossing a slab boundary (e.g., 200 to 301 units) can cause the higher rate to apply to all your units, not just the excess. This is why small consumption increases sometimes cause large bill jumps.
How the Electricity Slab System Actually Works
Pakistan's electricity pricing isn't a flat rate — it's a tiered system where the per-unit cost increases as your consumption rises. NEPRA (National Electric Power Regulatory Authority) sets these tiers, called "slabs," and DISCOs apply them uniformly. The idea is to subsidize low-consumption households while charging more from heavy users.
The critical mechanism that confuses most consumers: Pakistan's slab system is non-incremental for many consumption levels. This means that when you cross certain slab boundaries, the higher rate may apply to ALL your units, not just the units above the threshold. This is fundamentally different from progressive tax systems where only the income above each bracket pays the higher rate.
Current Approximate Slab Rates
| Slab (Units) | Approximate Rate (Rs/kWh) | Consumer Type | Notes |
|---|---|---|---|
| 0–100 | ~Rs. 8-12 | Protected / lifeline | Lowest rate, subsidized |
| 101–200 | ~Rs. 16-20 | Residential | Moderate rate |
| 201–300 | ~Rs. 22-27 | Residential | Rate jump at this tier |
| 301–700 | ~Rs. 30-38 | Residential | Most urban AC users land here |
| 700+ | ~Rs. 38-45 | Residential | Highest residential rate |
| Commercial | ~Rs. 28-42 | Commercial | Different slab structure |
| Industrial | ~Rs. 22-35 | Industrial | Time-of-use rates apply |
These rates are approximate and change when NEPRA issues tariff notifications. The exact rates in any given month also depend on FPA and QTA adjustments applied on top. Check NEPRA's latest tariff determination at nepra.org.pk for current figures.
Critical understanding: Rates above are the BASE tariff. Your actual per-unit cost is higher after FPA, QTA, taxes, surcharges, and GST. The effective cost per unit can be 40-60% above the slab rate.
Why Bills Jump Dramatically at Slab Boundaries
Here's a real scenario that illustrates the problem: a household consuming 199 units pays the 101-200 slab rate on all units — say Rs. 18/unit, totaling around Rs. 3,582. The same household consuming 201 units crosses into the next slab, and the rate jumps to Rs. 24/unit on ALL 201 units — totaling Rs. 4,824. Those two extra units effectively cost an additional Rs. 1,242, not just Rs. 48.
This cliff effect is the source of enormous consumer frustration. It creates perverse incentives: staying at exactly 199 units saves more money than the electricity from units 200-250 is worth. Some consumers actively monitor their meters mid-cycle and reduce usage in the last week to avoid crossing a slab boundary.
Protected vs Non-Protected Consumer Categories
The slab system treats "protected" and "non-protected" consumers differently:
- Protected consumers: Those consuming up to 200 units monthly. They receive a subsidized rate — sometimes called the "lifeline" tariff. The government partially absorbs the cost difference.
- Non-protected consumers: Those consuming above 200 units. They pay the full unsubsidized rate. The jump from protected to non-protected status at the 200-unit mark is one of the sharpest cliff effects in the system.
For a detailed explanation of protected vs non-protected categories, see our explainer. To calculate your bill based on units consumed, use our electricity bill calculator.
Strategies for Managing Your Electricity Slab
- Know your slab boundaries. If you typically consume 280-320 units, you're right at a slab boundary. Even small reductions (switching to LED bulbs, limiting AC hours) can drop you below the threshold and save thousands of rupees.
- Monitor mid-cycle. Check your meter reading on the 15th of your billing cycle. If you're trending toward a slab boundary, adjust usage in the remaining days.
- Seasonal awareness. Summer AC usage pushes most households from the 200-300 unit range into 400-700 units — a massive slab jump. Pre-summer insulation, efficient ACs (inverter technology), and thermostat discipline can keep you in a lower slab.
- Consider solar. Net metering reduces your grid consumption, potentially dropping you into a lower slab. Even a small 3 kW system can reduce your grid draw by 200-300 units monthly. See how to apply for net metering.
Industrial and Commercial Slabs
Business connections follow a different slab structure with generally higher base rates but different thresholds. Industrial consumers may also have time-of-use (TOU) tariffs where electricity costs less during off-peak hours (night) and more during peak hours (daytime). If you run a factory or commercial operation, understanding TOU tariffs can save significant amounts by shifting energy-intensive operations to off-peak windows.
Electricity Slabs — Reader Questions
There are approximately 5-7 residential slab tiers, ranging from the lifeline/protected rate (0-100 units) to the highest tier (700+ units). Commercial and industrial consumers have separate slab structures. Exact rates are set by NEPRA and updated periodically.
Pakistan's slab system is non-incremental at certain boundaries — crossing a threshold can cause the higher rate to apply to ALL your units, not just the excess. This "cliff effect" is especially sharp at the 200-unit and 300-unit boundaries.
The 0-100 unit slab for protected consumers has the lowest per-unit rate — approximately Rs. 8-12 per unit (before taxes and adjustments). This is essentially a lifeline tariff subsidized by the government for low-income households.
Reduce total units consumed: switch to LED lighting, use inverter ACs, limit standby power drain, and consider solar panels with net metering. Monitoring your meter mid-cycle helps you stay below slab boundaries when you're close to a threshold.
Base slab rates set by NEPRA are uniform across all DISCOs. However, some provincial taxes and surcharges vary by region. The core per-unit tariff for residential consumers at the same consumption level is the same whether you're on LESCO, MEPCO, or PESCO.