Use this TNEB Bill Calculator to instantly estimate your Tamil Nadu electricity bill based on the latest tariff slabs announced by TANGEDCO.
TNEB Bill Calculator 2026
Estimate your TANGEDCO electricity bill
Note: This calculator is updated as per the July 2024 tariff revision and follows the official telescopic slab system, helping domestic consumers understand why their EB bill increases when usage crosses certain limits like 400 or 500 units.
Tamil Nadu electricity bills are calculated using a slab-wise telescopic method, which means unit rates vary based on total consumption.
Here’s how this calculator works
- Enter your total bi-monthly consumed units from your bill or meter reading.
- The calculator applies the applicable tariff slabs.
- Government subsidy is applied automatically 200 free units for consumers using ≤ 500 bi-monthly units, or 100 free units for those above 500 units.
- A clear slab-wise cost breakdown is displayed.
Note: This calculator is intended for Domestic (LT–IA) connections only.
⚠️ Estimation only — not an official bill. This tool is an independent, unofficial calculator for reference purposes only. It is not affiliated with TANGEDCO, TNEB, or the Government of Tamil Nadu. Results are approximate and do not include fixed charges, FSA, meter rent, or taxes. Always verify your actual payable amount on the official TANGEDCO website.
Understanding TANGEDCO Tariff Slabs (2024–2026)
Tamil Nadu follows a telescopic tariff structure. When consumption exceeds a threshold (like 500 units), earlier units are also charged at higher rates, which often leads to bill shock.
Domestic Electricity Tariff Rates
For consumers using 500 units or below (New Scheme – 200 free units)
| Units Consumed (Bi-monthly) | Rate Per Unit |
|---|---|
| 1 – 200 units | ₹0 Free (New Scheme — 200 units) |
| 201 – 400 units | ₹4.70 per unit |
| 401 – 500 units | ₹6.30 per unit |
For consumers using above 500 units (Existing Tariff – 100 free units)
| Units Consumed (Bi-monthly) | Rate Per Unit |
|---|---|
| 1 – 100 units | ₹0 Free (100 units subsidy) |
| 101 – 400 units | ₹4.70 per unit |
| 401 – 500 units | ₹6.30 per unit |
| 501 – 600 units | ₹8.40 per unit |
| 601 – 800 units | ₹9.45 per unit |
| 801 – 1000 units | ₹10.50 per unit |
| Above 1000 units | ₹11.55 per unit |
📋 Note: Tariff rates shown are based on TNERC Tariff Order No. 6 of 2024, effective July 01, 2024. Updated May 2026 to reflect the Tamil Nadu CM’s 200 free units announcement for consumers using ≤ 500 bi-monthly units. Rates are subject to change by TNERC at any time. This site is not affiliated with TANGEDCO or any government body – tariff data is sourced from publicly available TNERC orders for consumer reference only.
Want to understand exactly how these slabs work with worked examples?
→ Read the full TANGEDCO Tariff Slabs guide
How the Free Electricity Scheme Works (Updated 2026)
- Usage ≤ 200 units (and total consumption ≤ 500 units) → ₹0 bill under the new scheme
- Usage 201–500 units → Charges apply only from the 201st unit onwards
- Usage > 500 units → Old 100-unit subsidy applies; first 100 units free, charges from the 101st unit
This calculator focuses on energy charges only. Fixed charges and surcharges may appear on official bills.
Tips to Reduce Your TNEB Electricity Bill
- Use 5-Star rated appliances for ACs and refrigerators.
- Replace CFLs with LED bulbs.
- Try to keep bi-monthly usage at or below 500 units to qualify for the new 200 free units scheme and avoid the higher telescopic slab rates that kick in above 500 units.
- Set AC temperature to 24°C for efficiency.
- Unplug devices when not in use to avoid standby power loss.
5 Common TNEB Billing Mistakes to Avoid
Many billing problems are avoidable. These are the most common mistakes Tamil Nadu consumers make with their TANGEDCO electricity bill.
1. Not checking the meter reading on your bill
Always compare the “Present Reading” on your bill with an actual photo of your meter on reading day. One misread digit can inflate your bill by hundreds of rupees.
2. Ignoring the 500-unit threshold
Many families are unaware that crossing 500 units triggers telescopic repricing. Staying just under 500 units can save ₹400–₹800 per cycle.
3. Not verifying arrears before paying
Arrears can appear even after a previous bill was fully paid due to processing delays. Always verify on the TANGEDCO portal before assuming arrears are correct.
4. Leaving meter inaccessible on reading day
If the meter reader can’t access your premises, TANGEDCO issues an estimated bill — often inaccurate — leading to a large correction bill later.
5. Waiting too long to dispute a wrong bill
Pay the disputed bill first to avoid disconnection, then raise a complaint. Delaying can result in disconnection while the dispute is being resolved.Complete TNEB Electricity Guides for Tamil Nadu ConsumersLooking for more detailed information about your TANGEDCO electricity connection? Explore our in-depth guides covering everything from reading your bill to filing a complaint:
Frequently Asked Questions
Is this the official TNEB / TANGEDCO website?
No. This is an independent, unofficial estimation tool created for consumer convenience. Official billing is handled by TANGEDCO (Tamil Nadu Generation and Distribution Corporation). For official bill payments, complaints, or account details, visit the official TANGEDCO portal at tangedco.gov.in.
Does this calculator include fixed charges?
No. This calculator estimates energy charges only – the portion based on units consumed. Your actual TANGEDCO bill will also include fixed charges (₹30–₹100), meter rent (₹10–₹30), electricity tax, Fuel Surcharge Adjustment (FSA), and any arrears. Add approximately ₹80–₹200 to the estimated amount to get closer to your actual total.
Why does my bill increase sharply after 500 units?
Because Tamil Nadu uses a telescopic tariff system. When bi-monthly consumption crosses 500 units, the rates for lower slabs (101–400 units) are restructured at higher rates – not just the units above 500. This repricing of earlier units causes a disproportionate jump in the total bill amount.
What is the Fuel Surcharge Adjustment (FSA) on my bill?
FSA is a variable per-unit charge that TANGEDCO revises quarterly to recover its fuel procurement costs (coal, gas used in power generation). It is applied to your total units consumed and can range from ₹0.05 to ₹0.50 per unit. This is why your bill can increase even if your consumption stays the same from one cycle to the next.
How does the free electricity scheme work in Tamil Nadu?
Tamil Nadu has two active subsidy tiers depending on your bi-monthly consumption. If you use 500 units or below, the new 200 free units scheme (announced by Chief Minister Vijay, effective May 2026) applies – your first 200 units are completely free and charges begin only from the 201st unit. If you use above 500 units, the older 100-unit subsidy continues – your first 100 units are free and charges begin from the 101st unit. No separate application is needed for either scheme; it is applied automatically to all domestic (LT–IA) consumers.
How do I find my TANGEDCO consumer number?
Your consumer number (9–11 digits) is printed at the top of every electricity bill you receive. It is also on a sticker on your electricity meter box. You need it for online payments, complaints, and checking bill history on the TANGEDCO portal.
How accurate is this TNEB Bill Calculator?
This calculator is highly accurate for energy charges – the largest component of most domestic bills. It uses the exact TANGEDCO tariff slabs effective from July 2024 and correctly applies the telescopic structure. Typical variance from the actual bill is ₹80–₹250 due to FSA, fixed charges, and taxes which this calculator does not include.
Can I pay my TNEB bill through this website?
No. This website is a bill estimation tool only – it does not process payments. To pay your TANGEDCO electricity bill, use the official TANGEDCO portal (tangedco.gov.in), or payment apps like PhonePe, Google Pay, or Paytm by selecting TANGEDCO as the electricity provider.