TNEB Tariff Rates 2026-27 (Complete Domestic & Commercial Slab Details)
Looking for the latest electricity rates in Tamil Nadu? TANGEDCO/TNEB bills are calculated based on CPI-indexed tariffs approved by the TNERC. To help you understand your billing structure, we have compiled the complete list of slab-wise charges, fixed demand fees, and subsidy policies for domestic, commercial, and industrial consumers below.
TNEB Tariff Rates 2026-27
TANGEDCO (TNEB) Domestic & Commercial Tariff Slabs & Charges
| Consumer Category (LT) | Consumption Slabs | Energy Rate (₹/kWh) | Fixed Charge (₹/month) |
|---|---|---|---|
| Domestic / Home (LT-IA) Bimonthly billing. 100/200 units free bimonthly subsidy applies. |
0 - 400 units | ₹4.95 | Free (₹0.00) |
| 401 - 500 units | ₹6.65 | ||
| 501 - 600 units | ₹8.80 | ||
| 601 - 800 units | ₹9.95 | ||
| 801 - 1000 units | ₹11.05 | ||
| Above 1000 units | ₹12.15 | ||
| Handlooms (LT-IA) | First 300 units free bimonthly | Standard LT-IA rates after free tier | Free (₹0.00) |
| Huts (LT-IB) | Fully Subsidized | Free (₹0.00) | Free (₹0.00) |
| Bulk Supply (LT-IC) | All units | ₹8.80 | ₹110.00 |
| Common Facilities (LT-ID & IE) | All units | ₹8.80 | ₹110.00 per kW |
| Agriculture (LT-IV) | Fully Subsidized | Free (₹0.00) | Free (₹0.00) |
| Consumer Category (LT) | Consumption Slabs | Energy Rate (₹/kWh) | Fixed Charge (₹/kW/month) |
|---|---|---|---|
| Commercial / Gen Purpose (LT-V) Bimonthly billing. |
0 - 100 units (Total bill ≤ 100 units) | ₹6.65 | 0 - 50 kW: ₹110.00 50 - 112 kW: ₹332.00 Above 112 kW: ₹608.00 |
| All units (Total bill > 100 units) | ₹10.45 | ||
| Industries & IT Services (LT-IIIB) | All units | ₹8.25 | 0 - 50 kW: ₹84.00 50 - 112 kW: ₹165.00 Above 112 kW: ₹608.00 |
| Private Education & Hostels (LT-IIB2) | All units | ₹9.40 | 0 - 50 kW: ₹110.00 50 - 112 kW: ₹359.00 Above 112 kW: ₹608.00 |
| Govt Education & Hospitals (LT-IIB1) | All units | ₹8.80 | 0 - 50 kW: ₹110.00 50 - 112 kW: ₹359.00 Above 112 kW: ₹608.00 |
| Places of Worship (LT-IIC) | 0 - 120 units bimonthly | ₹6.40 | ₹110.00 |
| Above 120 units | ₹7.75 | ||
| Cottage & Micro Industries (LT-IIIA1) | 0 - 500 units bimonthly | ₹4.95 | ₹77.00 |
| Above 500 units | ₹7.15 | ||
| Power Looms (LT-IIIA2) | 0 - 500 units bimonthly | ₹7.15 (1000 units free) | ₹110.00 |
| Above 500 units | ₹8.25 (1000 units free) | ||
| Public EV Charging (LT-VII) | Average rate (Off-Peak) | ₹8.10 | 0 - 50 kW: ₹55.00 50 - 112 kW: ₹165.00 Above 112 kW: ₹304.00 |
| Construction & Temporary (LT-VI) | All units | ₹13.25 | ₹608.00 |
| Consumer Category (HT) | Consumption Slabs | Energy Rate (₹/kWh) | Demand Charge (₹/kVA/month) |
|---|---|---|---|
| HT-I - Industries & IT Services | All units | ₹7.50 | ₹608.00 |
| HT-IIA - Govt Institutions, Railways & CMRL | All units | ₹7.75 | ₹608.00 |
| HT-IIB - Private Educational Institutions | All units | ₹8.25 | ₹608.00 |
| HT-III - Commercial & Miscellaneous | All units | ₹9.40 | ₹608.00 |
| HT-IV - Construction & Temporary | All units | ₹13.25 | ₹608.00 |
| HT-V - Public EV Charging (HT) | All units | ₹8.10 | ₹304.00 |
* Tariff rates are based on the latest approved TNERC Suo-motu order (effective July 1, 2025 with CPI revisions for FY 2026-27). 5% electricity tax applies to commercial and industrial categories.
Overview of TNEB Tariff Rates 2026-27
Electricity tariff rates in Tamil Nadu are regulated by the Tamil Nadu Electricity Regulatory Commission (TNERC). Since 2022, TNERC has implemented a CPI-indexed tariff system where slab rates are reviewed and updated annually around July 1st based on inflation trends (capped at a maximum of 6% increase per year). This ensures that billing rates stay aligned with utility operational costs while providing a predictable framework for consumers.
Domestic (LT-IA) Billing & Subsidy Rules
For household domestic connections, TNEB operates a telescopic slab system combined with government-funded subsidies. Here are the core rules that govern your household bill:
1
200 Free Units Subsidy
If your bimonthly consumption is 500 units or less, the first 200 units are completely free (₹0.00).
2
100 Free Units Penalty
If your consumption crosses 500 units (even by 1 unit), the free units subsidy drops to just 100 units.
3
Telescopic Slabs
Units consumed in higher ranges are charged progressively higher rates rather than a flat fee.
Commercial (LT-V) & Industrial Billing Rules
Shops, offices, warehouses, and factories follow a different, more strict billing structure without telescopic step subsidies:
📊 Key Commercial Billing Rules:
1. Flat Rate System
If your bimonthly consumption crosses 100 units, a flat rate of ₹10.45 per unit applies to ALL units. There is no step-wise slab benefit.
2. Sanctioned Load Charges
Mandatory fixed demand charges are applied monthly based on sanctioned load capacity (e.g. ₹110 per kW per month for loads ≤50 kW).
Low Tension (LT) vs High Tension (HT) Connections
TANGEDCO divides consumers into two major categories based on load demands and supply voltage:
Low Tension (LT) ConnectionsDesigned for households, shops, and small industries. Electricity is supplied at standard low voltage (single-phase 230V or three-phase 415V) for loads usually below 112 kW.
High Tension (HT) ConnectionsReserved for heavy industries, commercial complexes, colleges, and factories with sanctioned loads exceeding 112 kW. Electricity is supplied at high voltages (11kV, 22kV, 33kV, or 110kV).
Frequently Asked Questions (FAQ)
Got some quick questions about Tamil Nadu electricity tariffs, slabs, or updates? Here are direct answers to common queries:
Tariff rates are reviewed annually. Under TNERC guidelines, CPI-linked tariff indexation takes effect on July 1st of every financial year, using consumer price inflation indicators (capped at a maximum of 6%).
No. For domestic connections (LT-IA), there are no fixed monthly demand charges or service charges. You only pay for the actual energy units consumed bimonthly.
Domestic, agricultural, and small commercial connections are billed bimonthly (every two months). High Tension (HT) connections and large industrial LT connections are billed monthly.
Yes, but only for commercial, industrial, and HT categories (normally 5% of energy consumption charges). Domestic household bills are fully exempt from electricity tax.