TNEB Bill Calculator & Detailed TANGEDCO Tariff Guide
Calculate your TNEB electricity bill easily. Understand the TANGEDCO bimonthly tariff math, the 100 free units deduction, and slab rates for residential connections.
Official Gazette: TNERC • FY 2024-25 & FY 2025-26
Statutory tariff schedule approved by TNERC under Order TNERC Order No. 07/2022 & Suo-Motu 08/2024.
₹900.00
Effective Rate: ₹3.60/unitYour Estimated Bill
At 250 units, your electricity costs about ₹900.
Where is your money going?
How your units are priced
Electricity gets more expensive the more you use. Your first few units are cheap, but your final units are charged at a much higher rate.
Your biggest opportunity
Because you are in the ₹6.25/unit slab, every appliance you turn off saves you money at this highest expensive rate.
* Estimated bill based on published utility tariff filings. (Source: TNERC Order No. 7 of 2022 & TANGEDCO CPI Escalation Lr. No. 2024)
Interactive Scenario Modeling
See how small changes in your monthly electricity consumption impact your total bill.
Regulatory Provenance & Verification Trail
Regulatory Document: TNERC Comprehensive Tariff Order for TANGEDCO (Bimonthly LT-IA)
Source URL: https://tnerc.gov.in/tariff_orders/TANGEDCO_Order_07_2022.pdf
SHA-256: 172bbceca771cbbf63f25d30bc9048a1d7fbe8b50257c7d42cf38be98d755743
Tamil Nadu Generation and Distribution Corp. (TNEB) (TANGEDCO) Citizen Helpdesk
Pay electricity bills directly on the official TANGEDCO government portal with zero hidden convenience fees.
Download duplicate monthly bill copy & tax invoice using your Consumer ID / Account Number / CA Number.
Register power outage, voltage fluctuation, or incorrect meter billing complaints via statutory 1912 helpline or SERC CGRF.
💡 Important Consumer Advisory (बिजली उपभोक्ता सूचना):
BijliWise is an independent statutory electricity tariff intelligence and bill auditing platform. We never ask for bank details, OTPs, or process direct financial payments. Always pay your electricity bills only through verified official DISCOM portals (https://www.tangedco.gov.in) or authorized Bharat BillPay (BBPS) channels.
Quick Answer: To calculate your TANGEDCO (TNEB) electricity bill, you need to understand that billing is done on a bimonthly (once in two months) basis. The first 100 units are entirely free for all domestic consumers. Beyond that, the tariff depends on your total consumption slab (e.g., up to 400 units, 401-500 units, or above 500 units), with rates progressively increasing for higher consumption.
Understanding the TNEB Bill Calculator
Calculating your electricity bill in Tamil Nadu can sometimes feel complex due to the unique bimonthly billing cycle and the telescopic tariff structure implemented by the Tamil Nadu Generation and Distribution Corporation (TANGEDCO), formerly known as TNEB. A reliable TNEB bill calculator helps demystify these charges, enabling consumers to budget their energy expenses accurately. This guide provides an in-depth look at how your electricity charges are computed, detailing the free unit deductions, the different consumption slabs, and fixed charges.
TANGEDCO Bimonthly Billing System Explained
Unlike many other states in India that bill consumers monthly, TANGEDCO follows a bimonthly (once in two months) billing cycle for domestic consumers. This means your meter is read every 60 days, and the bill generated reflects your combined consumption over this period.
While a bimonthly system reduces administrative overhead for the distribution company, it means consumers must be mindful of their consumption over a longer period. Crossing into a higher tariff slab can significantly impact the total bill amount, as the higher rates may apply retroactively to certain portions of your usage depending on the slab structure.
The 100 Free Units Deduction
One of the most significant benefits for domestic electricity consumers in Tamil Nadu is the government subsidy that provides the first 100 units of electricity completely free of charge, regardless of the total consumption. Whether you consume 150 units or 1,500 units in a two-month cycle, the energy charges for the initial 100 units are always deducted from your bill. This initiative aims to provide relief to all households and ensure basic electricity needs are met without financial strain.
TNEB Tariff Slabs for Domestic Consumers
The TANGEDCO domestic tariff (Tariff IA) is structured telescopically. However, the rates change dramatically based on which overall bracket your total bimonthly consumption falls into. Let's break down the typical slab structures (Note: Official rates are subject to revisions by the Tamil Nadu Electricity Regulatory Commission - TNERC).
1. Consumption up to 400 Units (Bimonthly)
If your total consumption for the two months is 400 units or less, you fall into the lowest tariff bracket.
| Units Consumed | Energy Charge (₹/unit) |
|---|---|
| 0 - 100 units | ₹0 (Free) |
| 101 - 400 units | ₹4.50 |
2. Consumption between 401 and 500 Units (Bimonthly)
If you consume between 401 and 500 units, a different set of rates applies to the units above 400.
| Units Consumed | Energy Charge (₹/unit) |
|---|---|
| 0 - 100 units | ₹0 (Free) |
| 101 - 400 units | ₹4.50 |
| 401 - 500 units | ₹6.00 |
3. Consumption above 500 Units (Bimonthly)
This is where the billing math changes significantly. If your consumption crosses 500 units, you are moved to a higher tariff bracket, and the rates for units between 101 and 400 also increase compared to the lower brackets.
| Units Consumed | Energy Charge (₹/unit) |
|---|---|
| 0 - 100 units | ₹0 (Free) |
| 101 - 400 units | ₹6.00 |
| 401 - 500 units | ₹8.00 |
| 501 - 600 units | ₹9.00 |
| 601 - 800 units | ₹10.00 |
| 801 - 1000 units | ₹11.00 |
| Above 1000 units | ₹11.00+ (Rates may vary) |
Fixed Charges Explained
In addition to the energy charges based on consumption, TANGEDCO levies a Fixed Charge (often billed per kW of connected load or as a flat rate depending on the consumer category). For domestic consumers, fixed charges are generally tiered. Lower consumption brackets might have zero or minimal fixed charges, while those consuming above 500 units might see fixed charges around ₹50 to ₹100 per billing cycle. Always refer to your physical bill for the exact fixed charge applicable to your service connection.
Example TNEB Bill Calculations
Example 1: Consumption of 350 Units
Let's say your bimonthly consumption is 350 units. Since this is under 400 units, you fall into the first bracket.
- First 100 units: ₹0
- Next 250 units (101 to 350): 250 units × ₹4.50 = ₹1,125
- Energy Charges: ₹1,125
- Fixed Charges: ₹0 (assuming exempt for this slab)
- Total Bill: ₹1,125
Example 2: Consumption of 480 Units
Your consumption is 480 units, placing you in the second bracket (401-500).
- First 100 units: ₹0
- Next 300 units (101 to 400): 300 units × ₹4.50 = ₹1,350
- Next 80 units (401 to 480): 80 units × ₹6.00 = ₹480
- Energy Charges: ₹1,350 + ₹480 = ₹1,830
- Total Bill: ₹1,830 + applicable fixed/duty charges.
Example 3: Consumption of 650 Units (The Slab Jump Effect)
If you consume 650 units, you cross the 500-unit threshold. Notice how the rate for units 101-400 jumps from ₹4.50 to ₹6.00.
- First 100 units: ₹0
- Next 300 units (101 to 400): 300 units × ₹6.00 = ₹1,800
- Next 100 units (401 to 500): 100 units × ₹8.00 = ₹800
- Next 100 units (501 to 600): 100 units × ₹9.00 = ₹900
- Next 50 units (601 to 650): 50 units × ₹10.00 = ₹500
- Energy Charges: ₹1,800 + ₹800 + ₹900 + ₹500 = ₹4,000
- Total Bill: ₹4,000 + applicable fixed/duty charges.
Notice the steep increase? Just 170 units more than Example 2 more than doubled the bill because crossing the 500-unit mark retroactively increased the rates for earlier units!
Energy Saving Tips for Tamil Nadu Summers
Given the intense summer heat in Tamil Nadu and the steep tariff hikes for higher consumption slabs, managing your electricity usage is crucial. Here are some effective strategies to keep your bimonthly consumption below the 500-unit threshold:
- Optimize Air Conditioning: Set your AC temperature to 24°C or 25°C. Every degree higher can save up to 6% in electricity. Clean the AC filters regularly to ensure optimal cooling efficiency.
- Upgrade to BLDC Fans: Brushless Direct Current (BLDC) ceiling fans consume up to 60% less energy compared to traditional induction fans. Given that fans run almost 24/7 in TN households, this is a significant saving.
- Switch to LED Lighting: Replace all CFLs and incandescent bulbs with energy-efficient LED lights. They last longer and consume a fraction of the power.
- Unplug Idle Appliances: "Vampire power" or standby power consumed by TVs, computers, and chargers when turned off but still plugged in can add up over a two-month cycle. Unplug devices when not in active use.
- Energy-Efficient Appliances: When purchasing new refrigerators, washing machines, or ACs, look for 4-star or 5-star BEE (Bureau of Energy Efficiency) ratings.
How to Check and Pay Your TANGEDCO Bill
We are an independent informational platform and not the official TANGEDCO portal. To check your official bill or make payments, please follow these steps:
- Visit the official TANGEDCO billing website (tangedco.org or tnebbillstatus.tn.gov.in).
- Enter your Consumer Number (with the region code) and your registered mobile number.
- View your current bill amount, due date, and download your bill receipt.
- Proceed to pay using Net Banking, UPI, Credit/Debit cards, or official Bharat BillPay apps like GPay or PhonePe.
Frequently Asked Questions (FAQs)
1. Is the 100 free units subsidy available every month?
No. Since TANGEDCO bills bimonthly, the 100 free units are provided once per billing cycle (i.e., 100 free units every two months).
2. What happens if I consume exactly 500 units?
If you consume exactly 500 units, you are charged according to the 401-500 slab. The rate hike for the 101-400 slab only applies if you consume 501 units or more.
3. How is my consumer number formatted?
Your TNEB consumer number usually includes a region code, section code, distribution code, and service number. Ensure you enter the full combination when checking your bill online.
4. Why is my bill suddenly so high this cycle?
If your consumption crossed the 500-unit mark for the two-month period, the tariff structure changes, applying higher rates even to your lower consumption slabs (units 101 to 400). This "slab jump" is the most common reason for a sudden spike in TNEB bills.
5. Are there extra charges for late payment?
Yes. TANGEDCO levies Belated Payment Surcharge (BPSC) for bills paid after the due date. It is highly recommended to pay before the due date to avoid these penalties and potential disconnection of service.
6. Does TANGEDCO offer smart meters?
TANGEDCO is currently in the process of rolling out smart meters across Tamil Nadu in phases. Once installed, smart meters will allow consumers to track their daily usage and may eventually pave the way for monthly billing or prepaid metering systems in the future.
How Electricity Billing Works in TANGEDCO (Tamil Nadu Generation and Distribution Corp. (TNEB))
Approved Tariff Schedules, Connection Regulations & Consumer Guidelines issued by the TNERC.
1. Domestic LT-1 Consumption Slabs & Energy Charges
The active residential record below is rendered directly from its verified versioned tariff data. Rates and slab boundaries are specific to this utility and category.
2. Fixed Monthly Connection Charges & State Electricity Taxes
Every monthly electricity bill issued by TANGEDCO includes fixed infrastructure charges and government duties alongside your variable energy consumption:
- Sanctioned Load Fixed Charge: Charged per kilowatt (kW) or per connection per month to maintain local sub-stations and transformer distribution networks.
- State Electricity Duty: Tax collected on behalf of the Tamil Nadu State Government, calculated as a percentage on the net energy bill.
- Fuel Adjustment Surcharges (FPPCA / FAC): Fluctuating fuel cost adjustments approved periodically by TNERC.
3. Checking Your TANGEDCO Bill & Online Payment Options
To check your live bill or pay your outstanding balance online, use your unique 10 to 12-digit Consumer Number (CA Number / Account ID) printed on your bill statement:
4. Consumer Grievance Redressal Mechanism
If your TANGEDCO bill exhibits erroneous meter readings, disputed arrears, or uncredited subsidy payments, you can register a formal complaint with the Consumer Grievance Redressal Forum (CGRF) or call the centralized consumer helpline at 1912.