Understanding your electricity bill can feel confusing. However, if you understand how Tamil Nadu Electricity Board (TNEB) calculates tariffs and charges, you can accurately predict your bill. This guide explains the new TNEB tariff, slab rates, and shows you a step-by-step calculation chart so you can estimate your bill before it arrives.
By the end of this article, you will understand how the electricity board applies charges based on your consumption and how the billing slabs determine your total amount.
What Is TNEB and Why Does Tariff Matter?
TNEB stands for Tamil Nadu Electricity Board. It supplies power to homes, businesses, and industries across Tamil Nadu. Most residential consumers receive bills every two months (bi-monthly), although billing practices may evolve as smart meters roll out.
The tariff rate per unit (₹/kWh) determines how much you pay for the electricity you use. Tamil Nadu uses a progressive slab system, where rates increase as consumption increases. This system encourages energy conservation and makes basic usage cheaper while charging more for high consumption.
Tamil Nadu New EB Tariff | Tamil Nadu Electricity Bill Calculation Chart
📊 TNEB Domestic Tariff Sample Chart (Bimonthly, Latest 2025)
| Units Consumed | Rate per Unit (₹/unit) | Notes |
|---|---|---|
| 110 | ₹2.35 | Next slab after first 100 units |
| 200 | ₹2.35 | 101–200 units slab |
| 300 | ₹4.70 | 201–400 units slab |
| 400 | ₹4.70 | End of mid slab |
| 500 | ₹6.30 | 401–500 units slab |
| 600 | ₹8.40 | 501–600 units slab |
| 700 | ₹9.45 | 601–800 units slab |
| 800 | ₹9.45 | End of this slab |
| 900 | ₹10.50 | 801–1000 units slab |
| 1000 | ₹10.50 | Completed slab |
| 1200 | ₹11.55 | Above 1000 units slab |
| 1500 | ₹11.55 | Highest tariff slab |
| 2000 | ₹11.55 | Highest tariff slab |
TNEB electricity bill New tariff and Calculation
Revised EB Tariff / Unit in Tamil Nadu
The above chart clearly shows the calculation method that the electricity board follows to derive the unit consumption.
New Electricity Charges in Tamil Nadu
The government-managed TANGEDCO handles electricity distribution entirely in Tamil Nadu. The government regulates the prices and provides considerable subsidies. The above chart Explains the Units Consumption readings and relevant Price as per the date. The electricity board fixes these rates based on the bimonthly reading for domestic consumption.
EB Bill in Chennai / EB Bill in Tamil Nadu
Recently, the electricity board revised the EB tariff in Chennai after a long gap of eight years This Revision come in to effect from 10th September 2022.
- EB Bill is Bimonthly in Tamil Nadu
- Eb Meter Reading Charges are Same Across Tamil Nadu
- The Above EB Bill chart is applicable only for Domestic Consumer, Separate Tariff Chart is available for Commercial Usage.
The Tamil Nadu Electricity Board (TNEB) formed on July 1, 1957, under section 54 of the Electricity (Supply) Act, 1948, in the State of Tamil Nadu as a vertically integrated utility responsible for power generation, transmission, and distribution. Since then, the electricity network has extended to all villages and towns throughout the State. Under the provisions of section 131 of the Electricity Act, 2003, the government restructured TNEB on November 1, 2010, into TNEB Limited, Tamil Nadu Generation and Distribution Corporation Limited (TANGEDCO), and Tamil Nadu Transmission Corporation Limited (TANTRANSCO). This Tariff is applicable for all districts in Tamil Nadu State.
TNEB electricity bill new tariff calculation (2026)
To help you better visualize, here’s a user-friendly chart for domestic consumer tariff:
TNEB Electricity Bill Tariff Chart (Domestic)
| Units Range | Per Unit Rate (₹) | Notes |
|---|---|---|
| 0–100 | ₹ 0.00 | Free units (subsidy) |
| 101–200 | ₹ 2.35 | Lower slab rate |
| 201–400 | ₹ 4.70 | Mid-range slab |
| 401–500 | ₹ 6.30 | Higher slab begins |
| 501–600 | ₹ 8.40 | Additional charges |
| 601–800 | ₹ 9.45 | Progressive tariff |
| 801–1000 | ₹ 10.50 | High consumption |
| >1000 | ₹ 11.55 | Highest domestic slab |
TNEB electricity bill new tariff & calculation Method
The electricity board starts the EB bill process by reading the meter. For most domestic consumers, TANGEDCO officials record electricity consumption every two months. In areas with smart meters, the system captures readings automatically. Officials calculate the total units consumed by subtracting the previous reading from the current one. This consumption data forms the basis for billing, allowing the board to charge each household accurately according to its actual usage.
After calculating the units, the electricity board applies the relevant tariff rates according to the consumption slab. It adds additional charges, such as fixed service fees, taxes, and fuel surcharges, to determine the total payable amount. The board deducts subsidies, like the free first 100 units for domestic users, automatically. Finally, TANGEDCO generates the EB bill and delivers it to the consumer as a physical copy or digitally through online portals and apps. This structured process ensures transparency, accuracy, and timely billing for all consumers.
Frequently Asked Questions (FAQs)
1. How often are bills generated?
The electricity board generates bills every two months (60 days) for most domestic consumers. Authorities are also discussing monthly billing as smart meters are adopted.
2. Why does my bill increase even if my units remain similar?
Your bill may rise if previous readings were estimated incorrectly or if meter readings change. Always compare current and past consumption patterns.
3. Are subsidies applied automatically?
Yes. The electricity board applies subsidies, such as the free first 100 units for domestic users, automatically before generating the bill.
4. Can I view my bill online?
Yes. You can visit the TANGEDCO official portal or mobile app, enter your service number, and view your latest bill digitally.
5. Do industrial or commercial users have the same slabs?
No. Commercial, industrial, and agricultural users have different slabs, fixed charges, and sometimes peak-hour surcharges.
6. How do I calculate my bill manually?
Take your total units consumed, apply each slab rate, and then add fixed charges and applicable taxes to determine the total payable amount.
7. Can I pay my TNEB electricity bill online?
Yes. TANGEDCO accepts payments via net banking, credit/debit cards, UPI, official apps, and authorized third-party portals.
8. How can I check my electricity consumption history?
You can track past consumption by logging into the TANGEDCO portal or mobile app, which helps monitor usage and plan energy-saving strategies.
9. What should I do if my meter shows an incorrect reading?
Immediately contact your local TANGEDCO office. Officials can inspect the meter and make necessary corrections to your bill.
10. Are there any incentives for low electricity consumption?
Yes. TNEB provides subsidies and lower tariff rates for households that consume fewer units, such as the free first 100 units. Reducing monthly consumption helps save money and stay in lower slabs.