Tamil Nadu
State / UT
TNEB
Utility Board
₹2.25/unit
1 Unit Rate
4 covered
Categories
Tariff by Connection Category
Domestic (Residential)
| Slab Range (kWh) | Rate/Unit |
|---|---|
| 0–100 | ₹2.25 |
| 101–200 | ₹3.50 |
| 201–500 | ₹4.80 |
| 501–above | ₹6.40 |
Detailed Charges
Commercial
| Slab Range (kWh) | Rate/Unit |
|---|---|
| 0–100 | ₹6.65 |
| 101–above | ₹10.45 |
Detailed Charges
SOURCED (secondary) — TANGEDCO LT Commercial (General Purpose) category, per tneb.billcalculator.in/tneb-tariff-rates/ and tnebbillcalculator.com/tneb-tariff-details/ (two independent calculator sites, cross-checked, matching figures) citing TNERC's CPI-indexed tariff order. Bimonthly total consumption up to 100 units billed at Rs.6.65/unit, above 100 units at Rs.10.45/unit — this appears to be a NON-TELESCOPIC (whole-bill-at-one-rate) structure rather than incremental slabs, so representing it as telescopic slabs here may understate bills; not independently verified against a primary TNERC order PDF. Fixed charge steps up above 50kW (to Rs.332/kW then Rs.608/kW) — not modelled. 5% State Electricity Tax applies on the energy charge. Pending primary TNERC order cross-check.
Industrial
| Rate | Rate/Unit |
|---|---|
| All units | ₹8.25 |
Detailed Charges
SOURCED (secondary) — TANGEDCO LT-IIIB Industries & IT category, per tneb.billcalculator.in/tneb-tariff-rates/ and tnebbillcalculator.com/tneb-tariff-details/ (cross-checked, matching figures): flat rate Rs.8.25/unit + Rs.84/kW fixed charge (0-50kW band; steps up to Rs.165/kW and Rs.608/kW at higher loads, not modelled). Separate lower-rate sub-categories exist for cottage/micro industries (~Rs.4.95-7.15/unit) and power looms — not modelled. 5% State Electricity Tax applies. Pending primary TNERC order cross-check.
Agriculture
| Rate | Rate/Unit |
|---|---|
| All units | ₹0.00 |
Detailed Charges
SOURCED (secondary) — TANGEDCO LT-IV Agricultural category, per tneb.billcalculator.in/tneb-tariff-rates/ and tnebbillcalculator.com/tneb-tariff-details/: fully subsidised/free supply for agricultural (pump-set) connections, exempt from electricity tax. Pending primary TNERC order cross-check.
Tamil Nadu Tariff Structure Explained
Tamil Nadu 1 Unit Rate
For domestic electricity consumers in Tamil Nadu, the initial 1 unit rate starts at ₹2.25 per kWh for consumption within the first slab per bi-monthly billing cycle.
Tariff Categories
The tariff schedule for Tamil Nadu covers 4 consumer categories shown above (Domestic (Residential), Commercial, Industrial, Agriculture). Each category has its own energy rates and fixed charges designed for domestic, commercial, industrial or agricultural usage.
Fixed Charges and Other Charges
In addition to unit energy rates, TNEB electricity bills include fixed charges a fuel cost adjustment of ₹0.35/unit, and (where applicable) meter rent based on connection parameters.
Electricity Bill Calculation
To estimate your electricity bill for Tamil Nadu, multiply your bi-monthly energy consumption in kilowatt-hours (units) by the applicable slab rates, add fixed charges, and include applicable taxes or duties. You can compute your estimated bill instantly using our TNEB electricity bill calculator.
Applicable Electricity Board
These electricity tariff rates are applicable for consumers in Tamil Nadu served by TNEB.
State / UT
Tamil Nadu
Electricity Board
TNEB
Last Updated
29 August 2026
Frequently Asked Questions
What are the latest electricity tariff rates in Tamil Nadu?
The latest verified tariff rates for Tamil Nadu are structured by connection category (Domestic (Residential), Commercial, Industrial and Agriculture) as shown in the tables above, sourced from Tamil Nadu Generation and Distribution Corporation (TANGEDCO)'s published tariff schedule effective 1 April 2026.
How do I calculate my Tamil Nadu electricity bill online?
Use our dedicated TNEB bill calculator — enter your units consumed and connection type for an itemised, slab-by-slab estimate including fixed charges and electricity duty.
Why is my Tamil Nadu electricity bill higher than the energy charges alone?
In addition to per-unit slab rates (energy charges), your bill includes other components such as fixed/demand charges, meter rent, a fuel cost adjustment surcharge, and electricity duty (tax).
How often are these electricity tariff rates updated?
Electricity tariff rates in India are typically revised periodically by the respective State Electricity Regulatory Commission (SERC). We update our tariff data as soon as new orders are verified — see the "last verified" date on each category card above.
What is the price of 1 unit of electricity in Tamil Nadu?
The rate for the first slab of Domestic electricity in Tamil Nadu is ₹2.25 per unit. This rate may increase as consumption moves into higher slabs — see the Domestic (Residential) table above for the full slab structure.
Does TNEB offer a separate tariff for Commercial or Industrial connections?
Yes — see the Commercial, Industrial and Agriculture categories above for their own slab rates and fixed charges, distinct from the Domestic tariff.