💡 Tamil Nadu Electricity Bill Calculator
TANGEDCO (Tamil Nadu Generation and Distribution Corporation) - Current slab tariff rates
First 100 units free for all domestic consumers
| Consumption range | Rate per unit |
|---|---|
| 0-100 units | Free |
| 101-200 units | Rs. 1.50/unit |
| 201-500 units | Rs. 3.00/unit |
| 500+ units | Rs. 5.70/unit |
| Fixed charge | No fixed charge for domestic consumers |
100 units
Rs. 0 (free)
approx/month
200 units
Rs. 155
approx/month
300 units
Rs. 455
approx/month
500 units
Rs. 1,055
approx/month
Calculate your Tamil Nadu electricity bill
TNEB / TANGEDCO - First 100 units free for domestic consumers. Rates 2023-24.
Estimated Monthly Bill
₹158
200 units - Avg ₹0.79/unit
Bill breakdown
Monthly bill
₹158
Quarterly
₹474
Annual estimate
₹1,896
Tips to reduce your bill
- - Switch to 5-star BEE-rated appliances - they use 30-50% less electricity
- - Use LED bulbs (7W LED = 60W incandescent in brightness)
- - Set AC to 24-26 degrees C - each degree below 24 increases consumption ~6%
- - Avoid peak hours (6-10 PM) if your DISCOM has time-of-use tariffs
- - A 1kW solar rooftop panel generates ~100-120 units/month in India
Rates are approximate and may vary by consumer category, load sanctioned, and recent tariff orders. Check your DISCOM website or latest electricity bill for exact rates. Electricity duty and other levies vary by state.
Tamil Nadu Electricity - Key Facts
- -Tamil Nadu offers the most generous subsidy - first 100 units free for all households
- -No fixed/demand charge for domestic consumers - bill = pure energy charge
- -TANGEDCO also subsidizes farmers with free/heavily discounted power
- -Solar policy: 1 MW+ installations require TANGEDCO permission; net metering available
- -Chennai, Coimbatore, Madurai, Salem are major TANGEDCO service cities
- -Very high subsidy burden - TN government compensates TANGEDCO Rs. 8,000+ Cr/year
Tamil Nadu electricity bill by units consumed
| Units/month | Energy charge | Approx. total bill |
|---|---|---|
| 50 units | ₹0 | ₹0 |
| 100 units | ₹0 | ₹0 |
| 150 units | ₹75 | ₹75 |
| 200 units | ₹150 | ₹150 |
| 250 units (typical) | ₹300 | ₹300 |
| 300 units | ₹450 | ₹450 |
| 400 units | ₹750 | ₹750 |
| 500 units | ₹1,050 | ₹1,050 |
Computed from TANGEDCO slab rates plus the No fixed charge for domestic consumers fixed charge. Approximate — before electricity duty. A typical 250-unit household pays about ₹300/month, or ₹3,600 a year.
What each appliance costs to run in Tamil Nadu
| Appliance | Units/month | Monthly cost |
|---|---|---|
| 1.5-ton AC (~6 hrs/day, summer) | 270 | ₹810 |
| Refrigerator (double-door) (running 24×7) | 55 | ₹165 |
| Geyser (2 kW) (~45 min/day) | 45 | ₹135 |
| Ceiling fan (×3) (~10 hrs/day) | 60 | ₹180 |
| Washing machine (~5 loads/week) | 20 | ₹60 |
| LED TV + set-top box (~5 hrs/day) | 25 | ₹75 |
Costed at Tamil Nadu's marginal rate of ₹3/unit — the slab most households top out in. Cooling and water heating dominate the bill, so those are where efficiency upgrades pay back fastest.
FAQs - Tamil Nadu Electricity Bill
What are the current electricity tariff slabs in Tamil Nadu?▾
Tamil Nadu (TANGEDCO) residential tariff: 0-100 units: Free, 101-200 units: Rs. 1.50/unit, 201-500 units: Rs. 3.00/unit, 500+ units: Rs. 5.70/unit. Fixed charge: No fixed charge for domestic consumers. Note: First 100 units free for all domestic consumers.
What is a typical monthly electricity bill in Tamil Nadu?▾
In Tamil Nadu, a typical household using 250 units/month pays about ₹300. A smaller 2BHK using ~150 units costs roughly ₹75, while a larger 3BHK using ~350 units runs about ₹600. Over a year, 250 units/month adds up to about ₹3,600. These are estimates before any electricity duty.
How much does it cost to run a 1.5-ton AC in Tamil Nadu?▾
A 1.5-ton AC run about 6 hours a day draws roughly 270 units a month. At Tamil Nadu's marginal rate of ₹3/unit (the slab most households top out in), that adds about ₹810 to your monthly bill. Using a 5-star inverter AC and setting it to 26°C can cut this by 20–30%.
How do I calculate my electricity bill in Tamil Nadu?▾
Apply the slab rates progressively — each rate covers only the units within that band, not all units. Then add the fixed charge (Tamil Nadu has none for domestic consumers), plus electricity duty (usually 5–6%). The calculator above does this automatically for your exact units.
How can I reduce my electricity bill in Tamil Nadu?▾
The biggest levers in Tamil Nadu are cooling and water heating. Move to 5-star inverter appliances, set the AC to 26°C, use a timer on the geyser, and switch to LED lighting. Because first 100 units free for all domestic consumers, staying under the free/subsidised slab makes a big difference. Keeping monthly usage under the next slab threshold avoids the steep higher-slab rates.
Is rooftop solar worth it in Tamil Nadu?▾
For higher-consumption homes in Tamil Nadu, rooftop solar usually pays back in 4–6 years because it offsets units billed at the highest slab rate (₹3/unit here). Solar policy: 1 MW+ installations require TANGEDCO permission; net metering available. The PM Surya Ghar scheme also offers a central subsidy on residential rooftop solar.
Who is the electricity provider in Tamil Nadu?▾
Tamil Nadu electricity is distributed by TANGEDCO (Tamil Nadu Generation and Distribution Corporation). Tamil Nadu offers the most generous subsidy - first 100 units free for all households