HAZECO Tariff & Unit Rates Explained – How Electricity Units Are Charged
Understanding tariff slabs and unit rates is essential to know why your HAZECO electricity bill increases or decreases each month. Many users assume higher bills always mean more usage, but in reality, tariff changes and slab rates play a major role.
This guide explains HAZECO electricity tariffs and unit rates in simple terms, so you can understand how your bill is calculated and how to manage consumption better.
What Is an Electricity Tariff?
An electricity tariff is the pricing system used to calculate how much you pay per unit (kWh) of electricity.
HAZECO applies tariffs based on:
- Type of connection
- Monthly electricity consumption
- Government-approved rate slabs
Each tariff category has different unit rates.
What Is a Unit (kWh)?
A unit, measured in kilowatt-hour (kWh), represents electricity consumption.
Example:
- A 1000-watt appliance used for 1 hour = 1 unit
Your bill calculates:
Total Units Consumed × Applicable Unit Rate
Common HAZECO Tariff Categories
Your tariff category is printed on your bill. Common categories include:
Domestic Tariff
Used for:
- Residential houses
- Apartments
- Personal household use
Domestic tariffs usually follow slab-based pricing, meaning:
- Lower units = lower rate
- Higher units = higher rate
Commercial Tariff
Used for:
- Shops
- Offices
- Small businesses
Commercial unit rates are higher than domestic and may include fixed charges.
Industrial Tariff
Used for:
- Factories
- Manufacturing units
- Heavy machinery users
Industrial tariffs vary based on:
- Load
- Supply type
- Consumption pattern
How Slab-Based Unit Rates Work
Most domestic connections follow slab-based tariffs.
This means electricity units are divided into ranges (slabs), and each slab has a different unit rate.
Example (illustrative):
| Units Consumed | Unit Rate |
|---|---|
| 1–100 units | Low rate |
| 101–200 units | Medium rate |
| 201+ units | Higher rate |
When consumption crosses into a higher slab, only the units in that slab are charged at the higher rate, not all units.
Understanding tariff slabs helps you know why your bill increases, but the easiest way to see how tariffs affect your bill is to calculate it.
You can use our HAZECO bill calculator to estimate your electricity charges based on units consumed and tariff slabs.
Why Your Bill Suddenly Increases
A sudden increase often happens due to:
Slab Change
Crossing into a higher slab increases the per-unit cost.
Seasonal Usage
Fans, heaters, air-conditioners increase usage.
Fuel Price Adjustment (FPA)
Government-approved adjustments added monthly.
Tariff Revision
Unit rates may change due to policy updates.
Additional Charges That Affect Unit Cost
Your bill may include extra charges beyond basic unit rates:
Fuel Price Adjustment (FPA)
Adjusts bills based on fuel cost changes used for electricity generation.
Quarterly Adjustments
Recover or refund past cost differences.
Fixed Charges
Applied even if usage is low.
Electricity Duty & Taxes
Government-mandated charges.
These charges are not controlled by HAZECO alone and may vary monthly.
How to Find Your Tariff & Unit Rate on the Bill
On your HAZECO bill, look for:
- Tariff Category
- Units Consumed
- Energy Charges Section
This section shows how unit rates were applied.
How to Reduce Your Electricity Bill
Understanding tariffs helps reduce bills:
- Stay within lower slabs when possible
- Use high-power appliances efficiently
- Avoid peak usage hours
- Monitor monthly unit consumption
- Compare current units with previous months
Estimated Readings & Tariff Impact
If a bill is based on estimated readings, unit consumption may be higher than actual usage.
In such cases:
- Compare meter reading with the bill
- Request correction if needed
- File a complaint if the estimate is incorrect
What to Do If Tariff or Charges Seem Incorrect
If you believe tariff or unit charges are wrong:
- Recheck your bill details
- Compare with previous months
- Verify meter readings
- Register a complaint with your reference number
Why Knowing Tariffs Is Important
Understanding tariffs and unit rates helps you:
- Predict monthly bills
- Identify overbilling
- Avoid slab jumps
- Control electricity costs
- Make informed usage decisions
Final Words
Electricity tariffs are not random. They follow defined rules, slabs, and adjustments.
By understanding HAZECO tariff categories and unit rates, you gain control over your electricity expenses and avoid surprises on your bill.
If you haven’t checked your bill yet, use the HAZECO Online Bill Check to view your latest bill and understand how tariffs apply to your usage.
What is a tariff in an electricity bill?
A tariff is the pricing category and rate structure used to calculate your electricity charges. It defines how much you pay per unit (kWh) based on your connection type (e.g., domestic or commercial) and your monthly usage.
What is a unit (kWh) and how is it charged?
A unit is measured in kilowatt-hours (kWh). Your bill is calculated by applying the tariff rate (often slab-based) to the number of units you consume in a billing month.
Why does my bill increase even when I use only a few extra units?
Electricity bills can increase sharply if your usage crosses into a higher tariff slab. When that happens, the units in the higher slab may be charged at a higher rate, increasing the total bill.
What are tariff slabs and how do they work?
Tariff slabs are usage ranges (for example, 1–100, 101–200 units) that may have different unit rates. Slab-based billing means the per-unit cost can change as monthly consumption increases.
How can I find my tariff category on the HAZECO bill?
Your tariff category is usually printed in the consumer or billing details section of your bill. It may appear as a tariff code or category name (such as domestic or commercial).
What is Fuel Price Adjustment (FPA) and why is it added?
Fuel Price Adjustment (FPA) is an adjustment that may be added to reflect changes in power generation fuel costs. It can vary month to month and can affect your final payable amount.