TNEB Tariff Details 2026
Check the complete, updated TNEB/TANGEDCO electricity unit charges, telescopic domestic subsidies, and commercial load demand charges in Tamil Nadu.
Introduction to TNEB/TANGEDCO Slabs 2026
The electricity billing system in Tamil Nadu is regulated by the Tamil Nadu Electricity Regulatory Commission (TNERC) and executed by the Tamil Nadu Generation and Distribution Corporation (TANGEDCO). To calculate your utility bills accurately, you must understand the current TNEB Tariff Details 2026. TANGEDCO divides consumers into Low Tension (LT) and High Tension (HT) categories based on the voltage level and the contracted load of the connection.
The tariff rates currently prevailing in 2026 incorporate the structural adjustments from the latest TNERC tariff orders, including the updated bimonthly telescopic slab calculations and the revised 200 units free domestic subsidy. Understanding these slabs allows you to plan your household or commercial energy consumption better to stay within a lower billing bracket.
Official TNEB Tariff Sheet 2026 (HT & LT Connections)
The revised electricity rates and demand charges payable by various consumers in Tamil Nadu are listed below. These rates match the backend code of our calculator tools:
| Tariff Code | Connection Category & Slabs | Energy Charges (₹/Unit) | Fixed / Demand Charges |
|---|---|---|---|
| I. High Tension (HT) Supply (11kV / 22kV / 33kV / 110kV) | |||
| HT I-A | Industries, Factories, IT Services and Data Centers | ₹7.50 / Unit | ₹589 / kVA / Month |
| HT II-A | Government Educational Institutions, Government Hospitals, Railways, CMRL | ₹7.75 / Unit | ₹589 / kVA / Month |
| HT II-B | Lift Irrigation Cooperative Societies | ₹0.00 (Fully Subsidized) | ₹0.00 |
| HT III | Private Educational Institutions, Hostels and segregated Medical Colleges | ₹8.25 / Unit | ₹589 / kVA / Month |
| HT V | Miscellaneous Categories (Temporary / Commercial High Load) | ₹13.25 / Unit | ₹608 / kVA / Month |
| II. Low Tension (LT) Supply (230V Single-Phase / 415V Three-Phase) | |||
| LT I-A |
Domestic Connections (Households & Multi-tenements): • If Bi-Monthly Usage is ≤ 500 Units: – First 200 Units: FREE (₹0) – 201 to 400 Units: ₹4.95 / Unit – 401 to 500 Units: ₹6.65 / Unit • If Bi-Monthly Usage is > 500 Units (Telescopic Slabs): – First 100 Units: FREE (₹0) – 101 to 400 Units: ₹4.95 / Unit – 401 to 500 Units: ₹6.65 / Unit – 501 to 600 Units: ₹8.80 / Unit – 601 to 800 Units: ₹9.95 / Unit – 801 to 1000 Units: ₹11.05 / Unit – Above 1000 Units: ₹12.15 / Unit |
₹0.00 ₹4.95 / Unit ₹6.65 / Unit ₹0.00 ₹4.95 / Unit ₹6.65 / Unit ₹8.80 / Unit ₹9.95 / Unit ₹11.05 / Unit ₹12.15 / Unit |
₹0.00 (Fixed Charges Exempted) |
| LT I-A | Handlooms in Residence (First 300 Units bi-monthly are FREE, excess charged at Domestic rates) | 0 to 300 Units: ₹0.00 Excess: Domestic Slabs |
₹0.00 |
| LT I-B | Huts (Fully Subsidized by Government) | ₹0.00 (Free) | ₹0.00 |
| LT I-C | Bulk Supply (Single Point Metering for Defense, colonies, etc.) | ₹8.80 / Unit | ₹110 per kW / 2 Months |
| LT I-D | Common Facilities in Multi-tenements (lifts, common pump, lobby lighting) | ₹8.80 / Unit | ₹110 per kW / 2 Months |
| LT I-E | Common Facilities in small Multi-tenements (<=10 residents, <=3 floors, no lift) | ₹8.80 / Unit (Payable: ₹5.75) | ₹110 per kW / 2 Months |
| LT II-A | Public Lighting & Water Supply by Local Bodies / Government | ₹8.80 / Unit | ₹110 per kW / 2 Months |
| LT II-B(1) | Government Educational Institutions, Government Hostels, Government Hospitals | ₹8.80 / Unit |
• 0 to 50 kW: ₹110 / kW • 50 to 112 kW: ₹359 / kW • >112 kW: ₹608 / kW / Month |
| LT II-B(2) | Private Educational Institutions & Hostels | ₹9.40 / Unit | |
| LT II-C | Places of Public Worship (Temples, Churches, Mosques): • 0 to 120 Units • Above 120 Units |
₹6.40 / Unit ₹7.75 / Unit |
₹110 per kW / 2 Months |
| LT III-A(1) | Cottage & Micro Industries (Approved limit <= 12 kW load): • 0 to 500 Units • Above 500 Units |
₹4.95 / Unit ₹7.15 / Unit |
₹77 per kW / 2 Months |
| LT III-A(2) | Power Looms (First 1000 Units bi-monthly are FREE): • 0 to 1000 Units • Above 1000 Units |
₹0.00 (Free) ₹8.25 / Unit |
₹110 per kW / 2 Months (Above 1000 Units usage) |
| LT III-B | General Industries, Factories, and IT Services | ₹8.25 / Unit |
• 0 to 50 kW: ₹84 / kW / Month • 50 to 165 kW: ₹165 / kW / Month • >165 kW: ₹608 / kW / Month |
| LT IV | Agriculture & Allied Activities (Fully Subsidized) | ₹0.00 (Free) | ₹0.00 |
| LT V |
Commercial Establishments (Shops, Offices, Hotels): • If Bi-Monthly Usage is ≤ 100 Units (All units rate) • If Bi-Monthly Usage is > 100 Units (Flat rate) |
₹6.65 / Unit ₹10.45 / Unit |
• 0 to 50 kW: ₹110 / kW / Month • 50 to 112 kW: ₹332 / kW / Month • >112 kW: ₹608 / kW / Month |
| LT VI | Temporary Connections & Construction Activities | ₹13.25 / Unit | ₹608 per kW / Month |
| LT VII |
Public Electric Vehicle (EV) Charging Stations: • Peak Hours (06:00-09:00 & 18:00-22:00) • Daytime Hours (09:00-16:00) • Off-Peak Night Hours |
₹9.75 / Unit ₹6.50 / Unit ₹8.10 / Unit |
• 0 to 50 kW: ₹55 / kW / Month • 50 to 112 kW: ₹165 / kW / Month • >112 kW: ₹304 / kW / Month |
Connection categories HT I, HT II-A, HT II-B, HT III and LT … Tariffs HT I, HT II-A, HT II-B, HT III and LT II-B(1), LT II-B(2), LT III-B, and LT V are subject to a **25% surcharge** on energy charges for consumption recorded during official Peak Hours (06:00 to 10:00 and 18:00 to 22:00). Conversely, a **5% rebate (discount)** is applicable for consumption recorded during Off-Peak Night Hours (22:00 to 05:00).
Deep Dive: TNEB Domestic Slabs (LT-I-A)
The domestic tariff category LT-I-A covers residential houses, apartments, and multi-tenement corridors. The billing cycle for this category is strictly bi-monthly (once every 2 months). The actual electricity rate per unit depends on whether your total consumption crosses the critical threshold of 500 units.
1. Bi-Monthly Consumption ≤ 500 Units
If your total consumption for the two-month period is 500 units or less, you benefit from the expanded government subsidy scheme:
- 0 to 200 Units: Billed at ₹0.00 per unit (100% FREE).
- 201 to 400 Units: Billed at ₹4.95 per unit.
- 401 to 500 Units: Billed at ₹6.65 per unit.
Example Calculation: If your home consumes 350 units bi-monthly, the first 200 units are completely free. The remaining 150 units (350 – 200) are billed at ₹4.95. Your total energy charge is 150 × ₹4.95 = ₹742.50.
2. Bi-Monthly Consumption > 500 Units (Telescopic Billing)
If your total consumption crosses 500 units by even a single unit, the billing structure shifts to telescopic slabs, and your free units subsidy is reduced from 200 units to 100 units:
- 0 to 100 Units: Billed at ₹0.00 per unit (FREE).
- 101 to 400 Units: Billed at ₹4.95 per unit.
- 401 to 500 Units: Billed at ₹6.65 per unit.
- 501 to 600 Units: Billed at ₹8.80 per unit.
- 601 to 800 Units: Billed at ₹9.95 per unit.
- 801 to 1000 Units: Billed at ₹11.05 / Unit.
- Above 1000 Units: Billed at ₹12.15 / Unit.
Example Calculation: If your home consumes 600 units bi-monthly, the calculation is: 100 units free (₹0) + 300 units (101 to 400) @ ₹4.95 (₹1,485) + 100 units (401 to 500) @ ₹6.65 (₹665) + 100 units (501 to 600) @ ₹8.80 (₹880) = ₹3,030.00.
Deep Dive: TNEB Commercial Slabs (LT-V)
Low Tension Tariff V applies to commercial connections, including retail shops, showrooms, private schools, colleges, private offices, hotels, restaurants, and warehouses. Unlike domestic connection categories, commercial billing does not receive any free units.
The billing rates are structured as follows:
- Bi-Monthly Consumption ≤ 100 Units: Billed at a flat rate of ₹6.65 per unit for all units.
- Bi-Monthly Consumption > 100 Units: Billed at a flat rate of ₹10.45 per unit for all units (not telescopic!).
Commercial Fixed Demand Charges
In addition to the energy consumption rate, commercial connections pay a monthly or bi-monthly fixed charge based on their sanctioned load capacity in kW:
- 0 to 50 kW: ₹110 per kW / Month (₹220 per kW for a bi-monthly cycle).
- 50 to 112 kW: ₹332 per kW / Month (₹664 per kW for a bi-monthly cycle).
- Above 112 kW: ₹608 per kW / Month (Billed monthly).
Furthermore, commercial and industrial connections are subject to a **5% State Electricity Tax (E-Tax)** which is applied to the total energy charges.
Time of Day (TOD) Tariff & Peak Hour Charges
To manage grid demand during high-load hours, TANGEDCO implements **Time of Day (TOD)** billing for HT connections and specific LT commercial/industrial lines (LT-II-B, LT-III-B, and LT-V).
Under this billing system, the energy charges are divided into three distinct time zones:
- Peak Hours (06:00 to 10:00 and 18:00 to 22:00): Billed at 25% extra on top of your normal unit energy rate.
- Off-Peak Night Hours (22:00 to 05:00): Eligible for a 5% discount (rebate) on your energy rate.
- Normal Hours (Remaining time periods): Billed at the standard energy slab rate.
Commercial users with high power consumption during morning and evening peak hours can significantly reduce their bills by shifting high-load tasks (such as water pumping, heavy machinery operation, or thermal processes) to daytime or late-night off-peak hours.
How to Reduce Your TNEB Electricity Bill?
In Tamil Nadu, TANGEDCO utilizes a telescopic slab billing system. Crossing certain consumption brackets (especially the 500-unit threshold for domestic accounts) suddenly inflates your unit charges. Apply these simple, practical habits to lower your monthly power consumption:
A standard 9W LED bulb provides equivalent brightness to an old 60W incandescent bulb while consuming 85% less power. Replacing all household lighting cuts your monthly lighting bill significantly.
Setting your air conditioner to 18°C forces the compressor to run continuously. Locking the temperature at 24°C allows the compressor to switch off and rest, reducing AC power draw by up to 20%.
Do not leave televisions, laptops, chargers, or microwave ovens on standby. Switch them off directly at the wall socket to prevent leakage current, which can silently add units over time.
Refrigerators and air conditioners older than 10 years operate on outdated, heavy-load compressors that draw 2-3 times more power. Switch to new BLDC-motor fans and 5-star inverter refrigerators.
Check Our Other Free TNEB Utilities
Check your bills or perform rooftop solar calculations instantly using our specialized free tool variants:
Domestic Calculator
Calculate household bimonthly bills and residential subsidies.
Commercial Calculator
Calculate business/shop bills, industrial rates, and demand charges.
Solar Bill Calculator
Analyze solar generation, net billing credits, and network charges.
Power Cut Today
Verify live scheduled substation maintenance outages today.
Shutdown Tomorrow
Check tomorrow’s announced TANGEDCO power cut areas and times.
Chennai Power Cuts
Verify live scheduled today & tomorrow power cuts in Chennai neighborhoods.
Frequently Asked Questions (FAQ)
1. How can checking TNEB Tariff Details help me save money?
Knowing the precise tariff slab thresholds is the best way to plan your energy usage. In Tamil Nadu, residential charges escalate sharply if your bi-monthly usage crosses the 500-unit mark (due to reduced subsidies). By tracking your meter regularly and checking the tariff details, you can adjust usage to stay in a lower slab.
2. Will switching to LED bulbs really reduce my bill?
Yes. A 9W LED bulb replaces a traditional 60W bulb, reducing lighting energy consumption by up to 85%. Over a bi-monthly cycle, this swap saves considerable units, helping you stay below critical slab boundaries.
3. Does keeping my air conditioner at 24 degrees really lower consumption?
Setting the AC to 18°C forces the compressor to run continuously without stopping. Setting the temperature to 24°C-26°C cools the room comfortably while allowing the compressor to cut off, reducing AC electricity consumption by up to 20%.
4. Why is it necessary to turn off appliances directly at the wall socket?
Turning off devices like TVs or computers via remote control puts them on standby. In standby mode, they draw small amounts of power (phantom loads). Switching them off at the wall socket cuts this leakage current entirely.
5. Is installing a Solar Water Heater cost-effective?
Electric geysers are high-wattage appliances that draw heavy current. Switching to a solar water heater cuts geyser consumption entirely, saving up to 100-200 units over a bi-monthly cycle.
6. Are these tariff rates updated with the latest TANGEDCO CPI indexed orders?
Yes, all listed rates are 100% updated according to the latest TANGEDCO/TNERC tariff orders for 2026. They are fully aligned with the calculation engines in our calculator tools.
7. What is the difference between LT and HT connections in Tamil Nadu?
Low Tension (LT) supply is for consumers drawing power at low voltage levels (single-phase 230V or three-phase 415V), such as standard homes, shops, and small industries. High Tension (HT) supply is for bulk consumers who draw power directly at high voltages (11kV, 22kV, 33kV, or 110kV), such as large factories, IT parks, and major commercial complexes.
8. How is the 5% electricity tax calculated for non-exempt categories?
For commercial (LT-V), industrial (LT-III-B), and educational connections, a 5% State Electricity Tax (E-Tax) is applied directly on the total energy unit charge amount. This tax does not apply to fixed charges. Domestic (LT-I-A) and agricultural (LT-IV) connections are completely exempt from this tax.