TNEB Bill Calculator
Calculate accurate TNEB/TANGEDCO electricity bills using the latest Tamil Nadu tariff slabs. Customize unit rates, fixed charges and other billing values to match your actual bill.
TNEB (TANGEDCO) Tamil Nadu Electricity Bill Calculator Online
Welcome to the most advanced and easy-to-use TNEB (TANGEDCO) Electricity Bill Calculator, designed specifically for consumers in Tamil Nadu. This tool helps you accurately estimate your household or commercial electricity bill using the latest Tamil Nadu electricity tariff structure.
In Tamil Nadu, electricity generation and distribution are managed by the Tamil Nadu Generation and Distribution Corporation Limited (TANGEDCO), under the Tamil Nadu Electricity Board (TNEB). All electricity tariffs, slab rates, and billing rules are regulated by the Tamil Nadu Electricity Regulatory Commission (TNERC), which defines the official billing structure followed across the state.
Since Tamil Nadu follows a bi-monthly telescopic slab system, calculating electricity bills manually can be complex and time-consuming. Multiple slab rates, fixed charges, and subsidies can significantly affect the final bill, making it difficult for users to estimate their actual monthly cost.
Our TNEB Bill Calculator simplifies this process by automatically applying the latest TNERC-approved tariff, including slab-wise unit rates, fixed charges, subsidies, and applicable surcharges. It also allows users to customize slab rates and billing parameters to simulate different tariff scenarios or updated government revisions.
This calculator is designed for everyone and supports multiple features for better accessibility and usability. It is available in English, Hindi, Bengali, Marathi, Tamil, and Telugu, making it easy for users across India to understand their electricity bill in their preferred language. Additionally, the tool supports a multi-theme interface for a better user experience across devices.
Whether you want to verify your TNEB electricity bill, plan monthly energy usage, compare tariff scenarios, or check your bill before making an online payment, this calculator provides complete transparency, flexibility, and accuracy based on the latest Tamil Nadu electricity tariff system.
TNERC Approved Tariff Rates & Government Subsidy Slabs
Official Government Subsidy Slabs & TNERC Approved LT-IA Domestic Tariff Details
Official TNERC Approved Tariff Structure (LT-IA Domestic)
The table below compares the existing FY 2024–25 tariff with the TNERC-approved tariff effective from 1 July 2025 for LT-IA Domestic consumers. Data has been verified against the official TNERC Tariff Order No. 6 of 2025. Verified official source: TNERC Tariff Order No. 6 of 2025 (LT-IA Domestic) .
| Slab Range (Bi-Monthly) |
Existing Tariff (FY 2024-25) | Approved Tariff (From 1st July, 2025) | ||
|---|---|---|---|---|
| Energy Charges (Rs./unit) |
Fixed Charges (Rs./kW/month) |
Energy Charges (Rs./unit) |
Fixed Charges (Rs./kW/month) |
|
| 0 – 400 kWh | 4.80 | N.A. | 4.95 | N.A. |
| 401 – 500 kWh | 6.45 | N.A. | 6.65 | N.A. |
| 501 – 600 kWh | 8.55 | N.A. | 8.80 | N.A. |
| 601 – 800 kWh | 9.65 | N.A. | 9.95 | N.A. |
| 801 – 1000 kWh | 10.70 | N.A. | 11.05 | N.A. |
| Above 1000 kWh | 11.80 | N.A. | 12.15 | N.A. |
Government of Tamil Nadu Electricity Tariff Subsidy Scheme (LT-IA Domestic)
The subsidy rates below are based on the Government of Tamil Nadu's Provisional Tariff Subsidy Order for FY 2026–27 and are applicable according to bi-monthly consumption slabs for LT-IA Domestic consumers. Sanctioned official source: Order No. 4 of 2026 Provisional Tariff Subsidy Order for FY 2026-27 .
Domestic (IA) Upto 500 units
| Slab Range (Bi-Monthly) | Rate |
|---|---|
| 0 – 100 units | Rs. 4.95 / unit |
| 101 – 200 units | Rs. 2.60 / unit |
| 201 – 300 units | Rs. 0.25 / unit |
| 301 – 400 units | Rs. 0.25 / unit |
| 401 – 500 units | Rs. 0.35 / unit |
Domestic (IA) Above 500 units
| Slab Range (Bi-Monthly) | Rate |
|---|---|
| 0 – 100 units | Rs. 4.95 / unit |
| 101 – 200 units | Rs. 0.25 / unit |
| 201 – 300 units | Rs. 0.25 / unit |
| 301 – 400 units | Rs. 0.25 / unit |
| 401 – 500 units | Rs. 0.35 / unit |
| 501 – 600 units | Rs. 0.40 / unit |
| 601 – 800 units | Rs. 0.50 / unit |
| 801 – 1000 units | Rs. 0.55 / unit |
| Above 1000 units | Rs. 0.60 / unit |
Tariff Data Verified from Official TNERC Orders
This TNEB Electricity Bill Calculator is based on the latest official TNERC tariff orders and Government of Tamil Nadu subsidy notifications. For simplicity, the calculator uses effective tariff slabs derived from the official tariff and applicable government subsidy rates, so users do not need to calculate subsidies separately. Fuel Adjustment Charges (FAC), fixed charges, and other applicable charges are then applied to generate an estimated itemized electricity bill.
How does TNEB calculate electricity bills for domestic connections?
The electricity billing system for domestic connections in Tamil Nadu follows a bi-monthly billing cycle, meaning your electricity usage is calculated once every two months (approximately 60 days). The TNEB (TANGEDCO) tariff structure is based on a telescopic slab system regulated by TNERC, where the final bill depends on total energy consumption during the billing period.
One of the most important thresholds in the Tamil Nadu electricity tariff system is 500 units per bi-monthly cycle. If your total consumption is 500 units or below, you fall under the lower subsidy category where the government provides significant benefits, including free units for the initial consumption slabs, helping reduce your overall electricity bill.
However, if your consumption exceeds 500 units even slightly, your billing category shifts to a higher tariff slab (Tier 2). In this category, the subsidy benefits are reduced, and only a limited number of units receive concessional rates. The remaining consumption is charged at higher slab rates, which can significantly increase your final bill amount.
Because of this tier-based structure, even small changes in monthly electricity usage can have a major impact on your total bill. Monitoring your consumption regularly is essential to avoid crossing the higher tariff threshold.
Our TNEB Bill Calculator automatically applies the latest TNERC-approved tariff rules and calculates both Tier 1 and Tier 2 scenarios for better comparison. It also allows users to customize slab rates, unit charges, and subsidy values, making it easy to simulate different billing conditions and understand how tariff changes affect your electricity bill.
TNEB Commercial LT Slabs, Fixed Charges & Surcharges
Commercial Low Tension (LT) electricity consumers in Tamil Nadu, classified under LT Tariff Category V, follow a completely different billing structure compared to residential users. Under the latest TNERC-approved tariff, commercial electricity bills are calculated using a flat energy rate instead of telescopic slab rates.
For commercial connections such as shops, offices, and small businesses, a uniform energy charge of ₹8.80 per unit is applied for all electricity consumed. This makes billing more straightforward but can result in higher total costs depending on usage.
In addition to energy charges, several important components are added to the final commercial electricity bill:
1. Fixed Charges (Demand Charges): Commercial consumers are charged ₹110 per kW of sanctioned load per month. Since billing is done on a bi-monthly basis, this becomes ₹220 per kW per billing cycle, based on your sanctioned load capacity.
2. Electricity Duty: A government tax of 5% is applied to the total energy charges, as per Tamil Nadu electricity regulations.
3. Fuel Adjustment Charge (FAC): An additional surcharge of ₹0.25 per unit is applied on every unit consumed to account for fluctuations in fuel and power generation costs.
Because of these additional charges, commercial electricity bills in Tamil Nadu can increase significantly compared to residential bills. Proper monitoring of both energy consumption and sanctioned load is essential for controlling monthly expenses.
Our TNEB Commercial Bill Calculator helps businesses automatically calculate their electricity bill using the latest TNERC tariff rules. It also allows users to customize unit rates, fixed charges, FAC, electricity duty, and sanctioned load values to simulate different billing scenarios and better manage electricity costs.
The Role of Sanctioned Load in Commercial TNEB Billing
Sanctioned load is the maximum electrical power capacity (measured in kilowatts) approved by TANGEDCO for a commercial electricity connection. It plays a crucial role in determining your fixed charges, regardless of how much electricity you actually consume.
Under the latest TNERC commercial tariff rules, fixed charges are calculated based on the sanctioned load and billing cycle. Since commercial billing in Tamil Nadu follows a bi-monthly cycle, the formula used is: Fixed Charges = Sanctioned Load (kW) × ₹110 × 2.
For example, if your shop or office has a sanctioned load of 5 kW, your fixed charges alone will be ₹1,100 per billing cycle, even if your electricity consumption is zero units. This makes sanctioned load one of the most important factors in controlling commercial electricity costs.
If a consumer consistently exceeds the approved sanctioned load, TANGEDCO may apply penalty charges or require an official load upgrade, which can further increase monthly expenses. Therefore, it is important for commercial users to keep their sanctioned load optimized according to their actual peak electricity usage.
Our TNEB Commercial Bill Calculator includes a dedicated sanctioned load input that automatically calculates fixed charges along with energy charges, electricity duty, and fuel adjustment charges (FAC). It also allows users to customize tariff values, demand charges, and load settings to simulate different billing scenarios and better manage electricity expenses.
Practical Tips to Reduce Your TNEB Electricity Bill
Reducing your bi-monthly consumption can help you stay below critical slab thresholds like 500 units and save thousands of rupees. Here are some highly effective and actionable tips:
Monitor your meter readings regularly. If you consume 500 units, your bill will be much lower than if you consume 501 units. Crossing the limit shifts you to Tier 2, costing you 100 free units and charging higher rates.
Traditional incandescent bulbs waste about 90% of their energy as heat. Replacing them with 5-star rated LED lights can reduce your lighting power consumption by up to 80%.
Air conditioners consume the most power. Set your AC to a comfortable 24°C - 26°C. Every degree higher can save up to 6% of the energy consumed by the unit. Clean the filters monthly.
TV sets, chargers, micro-ovens, and computers draw small amounts of power even when turned off but kept plugged in. Switch off at the wall socket to prevent standby consumption.
Understanding Key Billing Terms of TNEB
Understanding your TNEB electricity bill can sometimes be confusing due to technical terms and multiple charge components. To make it easier, here is a simple breakdown of the key elements used in the TNERC-approved Tamil Nadu electricity tariff.
Energy Charges: This is the main part of your bill and represents the cost of electricity actually consumed. It is calculated by multiplying your total units (kWh) with the applicable slab rates under the Tamil Nadu tariff system.
Fixed Charges / Demand Charges: These are charges collected for maintaining the electricity distribution infrastructure. For domestic consumers, fixed charges are generally minimal or ₹0.00 in certain slabs, while commercial users are billed based on their sanctioned load under TANGEDCO rules.
Meter Rent: This is a small fee charged for using the electricity meter. In most cases, domestic consumers in Tamil Nadu are exempt from meter rent, while commercial connections may include it depending on the tariff category.
Electricity Duty: This is a government-imposed tax calculated as a percentage of the energy charges. Typically, it is around 5% for commercial consumers, while domestic users may be exempt depending on usage slab and tariff rules.
Fuel Adjustment Charge (FAC): This is a variable surcharge added to compensate for fluctuations in fuel and coal costs used in power generation. For commercial LT connections, it is commonly applied at ₹0.25 per unit consumed.
Our TNEB Bill Calculator automatically applies all these components based on the latest TNERC tariff regulations and provides a clear, itemized bill breakdown. It helps users easily understand how their electricity bill is calculated and ensures complete transparency between consumption and final billing amount.
Recent TNEB Tariff Revisions and TNERC Guidelines
The electricity tariff in Tamil Nadu, managed by TANGEDCO, is periodically revised by the Tamil Nadu Electricity Regulatory Commission (TNERC) to reflect changes in fuel costs, inflation, and infrastructure development expenses. These revisions ensure a stable and reliable power supply across the state while maintaining financial sustainability of the electricity distribution system.
Recent tariff updates have focused on restructuring domestic slab categories and adjusting commercial electricity rates. These changes directly impact how your TNEB electricity bill is calculated, especially in terms of unit rates, slab limits, and fixed charges under different consumer categories.
For consumers, staying informed about the latest TNERC tariff revisions is essential for accurate budgeting and energy planning. Even small changes in unit rates or slab structures can significantly affect your monthly electricity bill, particularly for high-usage households and commercial users.
Our TNEB Bill Calculator is continuously updated according to the latest official TNERC tariff notifications and government gazettes. It ensures that you always receive an accurate and up-to-date bill estimate, whether you are calculating your current bill or planning future electricity expenses under revised tariff conditions.
Who is this Online Tamil Nadu Bill Calculator for?
Why use our Online TNEB Bill Calculator?
Calculating TNEB electricity bills manually is tedious and prone to errors due to shifting subsidies, free units, and fixed rates. Our calculator provides:
About TNEB (TANGEDCO) – Tamil Nadu Electricity Board
The Tamil Nadu Generation and Distribution Corporation Limited (TANGEDCO), operating under the Tamil Nadu Electricity Board (TNEB), is the state-owned electricity generation and distribution utility of Tamil Nadu. It is responsible for providing uninterrupted and reliable power supply to millions of residential, commercial, and industrial consumers across the state. All electricity tariffs and billing structures are regulated by the Tamil Nadu Electricity Regulatory Commission (TNERC), ensuring a standardized electricity pricing system throughout Tamil Nadu.
It is important to understand that our TNEB Bill Calculator is an independent, third-party online tool designed to help users estimate their electricity bills based on the latest TNERC-approved tariff structure. This calculator is not affiliated with, endorsed by, or an official website of TANGEDCO or TNEB. For official services, consumers should always refer to the authorized government portals.
You should use the TNEB Bill Calculator when you want to quickly estimate your electricity bill, verify the accuracy of your official TANGEDCO bill, simulate different consumption scenarios, or test customized slab rates and tariff values. It provides an instant and transparent breakdown of your electricity charges before making any payment or planning your monthly budget.
Common Services Offered by TANGEDCO
TANGEDCO provides several essential online and offline services for electricity consumers in Tamil Nadu, including:
- TNEB Bill Payment: Pay your electricity bills online using UPI, net banking, debit/credit cards, or authorized payment centers.
- New Electricity Connection: Apply for new domestic, commercial, or industrial power connections.
- Complaint Registration: Register complaints related to power failure, voltage issues, or billing discrepancies.
- Outage Information: Check scheduled maintenance updates and power cut notifications in your area.
- Tariff Details: View the latest TNERC-approved tariff rates, slab structures, fixed charges, and subsidy updates.
You can visit the official TANGEDCO portals for bill payment, account details, complaint registration, and customer support services.
For electricity-related emergencies or customer support, consumers can contact the official TANGEDCO helpline at 1912, which operates as a nationwide electricity grievance and support number. Local section offices can also be contacted for faster resolution of service-related issues.
Frequently Asked Questions (FAQs) - TNEB Billing
Detailed Real Examples of TNEB Calculations
To help you understand how the bi-monthly telescopic slabs and domestic tiers work in practice, here are two detailed examples:
Since the total consumption is 450 units, the first 100 units are provided free under the applicable tariff. The remaining 350 units are charged as follows:
- First 100 units: Free (100 × ₹0 = ₹0.00)
- 101 to 400 units (300 units): 300 × ₹4.70 = ₹1,410.00
- 401 to 450 units (50 units): 50 × ₹6.30 = ₹315.00
- Total Energy Charges: ₹1,410.00 + ₹315.00 = ₹1,725.00
- Fixed Charges & Surcharges: ₹0.00
Total Bill Amount: ₹1,725.00
Since the total consumption (550 units) exceeds 500 units, you fall into Tier 2. In this tier, the subsidy is reduced, and only the first 100 units are free. The remaining 450 units are charged as follows:
- First 100 units: Free (100 * ₹0 = ₹0)
- 101 to 400 units (300 units): 300 * ₹4.70 = ₹1,410.00
- 401 to 500 units (100 units): 100 * ₹6.30 = ₹630.00
- 501 to 550 units (50 units): 50 * ₹8.40 = ₹420.00
- Total Energy Charges: ₹1,410 + ₹630 + ₹420 = ₹2,460.00
- Fixed Charges & Surcharges: ₹0.00
Total Bill Amount: ₹2,460.00
Notice that consuming just 100 more units (550 vs 450) nearly doubles the bill amount due to the loss of 100 free units and the activation of higher tier slabs.
State/UT Wise Links
Select your electricity board to calculate bills using state-specific tariffs