TNEB Bill Calculator 2026 – Calculate Your EB Bill Instantly
Tamil Nadu got a new government recently, and one big promise is finally real — free electricity for households. Domestic consumers now get 200 units free every two months, but only if your total usage stays under 500 units in that cycle. This saves good money for many families, but the calculation has also changed a bit from before. To make it easy, you can use our free TNEB Bill Calculator — we keep it updated with the latest TANGEDCO rates and subsidy rules so you get the exact amount instantly.
TNEB Bill Calculator 2026
TANGEDCO (TNEB) Domestic Electricity Bill & Subsidy Calculator 2026-27
What is the TNEB Bill Calculator 2026?
TNEB Bill Calculator is a free online tool to check your domestic electricity bill in Tamil Nadu. It works out your exact charges as per the latest TANGEDCO tariff rates and the new 200 units free subsidy scheme. You just need to enter your consumer category and units consumed, and the tool will show you a slab-wise breakdown along with the final payable amount. No manual calculation needed, everything is instant and accurate.
How Your Domestic EB Bill Amount is Calculated?
TNEB bill comes bimonthly, which means the meter reading is taken once every two months and your bill is calculated on that basis. Now here is an important thing to understand: the free units subsidy is not fixed, it actually depends on your total consumption. If your bimonthly usage is 500 units or less, you get the full 200 units free. But if your consumption goes above 500 units, the free units get reduced to just 100, and on top of that, the rates for the remaining slabs also go up. So crossing 500 units is not just a small slab jump, it is actually a double loss you get fewer free units and you also end up paying a higher rate. In the table below, you can see the exact rate structure for both cases (500 and under, and above 500), along with a few calculation examples so the whole process becomes clear.
| Bimonthly Slab Range | Rates (500 Units or Less) | Rates (Above 500 Units) |
|---|---|---|
| 0 – 100 units | Free (Subsidy) | Free (Subsidy) |
| 101 – 200 units | Free (Subsidy) | ₹4.95 / unit |
| 201 – 400 units | ₹4.95 / unit | ₹4.95 / unit |
| 401 – 500 units | ₹6.65 / unit | ₹6.65 / unit |
| 501 – 600 units | N/A (Max 500 limit) | ₹8.80 / unit |
| 601 – 800 units | N/A (Max 500 limit) | ₹9.95 / unit |
| 801 – 1000 units | N/A (Max 500 limit) | ₹11.05 / unit |
| Above 1000 units | N/A (Max 500 limit) | ₹12.15 / unit |
Step-by-Step Calculation Examples
Understand how the telescopic calculations are processed under both bimonthly slabs:
500 Units or Less
- First 200 units (Free)
200 × ₹0.00 = ₹0.00 - Next 150 units (201 – 350)
150 × ₹4.95 = ₹742.50 - Total Payable Bill
₹742.50
Above 500 Units
- First 100 units (Free)
100 × ₹0.00 = ₹0.00 - Next 300 units (101 – 400)
300 × ₹4.95 = ₹1,485.00 - Next 100 units (401 – 500)
100 × ₹6.65 = ₹665.00 - Next 100 units (501 – 600)
100 × ₹8.80 = ₹880.00 - Total Payable Bill
₹3,030.00
How to Use the TNEB Bill Calculator
Using this calculator is very simple, you don’t need to do any manual math. Just follow these steps:
1
Select Consumer Category
Click the category dropdown and choose your connection type (mostly Domestic Home).
2
Enter Your Units Consumed
Check your latest EB reading, and type your bimonthly consumed units in the input box.
3
Click Calculate Bill
Hit the “Calculate My Bill” button. The tool will process it instantly using current slabs.
4
Check Slab Breakdown
A detailed report overlay opens with slab breakdown and final payable billing charges.
The 500-Unit “Saving Cheat Code” You Must Know!
Have you noticed how your EB bill suddenly jumps up if your reading goes even 1 unit above 500 (like 501 units)? This happens because crossing 500 units triggers two penalty rules together, and most people don’t realise this until they see their bill.
⚠️ Crossing 500 Units Penalty Breakdown:
1. Reduced Free Subsidy
The moment you hit 501 units, your free units subsidy drops from 200 to just 100. You lose 100 free units instantly.
2. Higher Slabs Triggered
Your units above 500 get charged at much higher tiers, from ₹8.80 up to ₹12.15 per unit instead of the base rates.
5 Practical EB Saving Habits to Keep Usage Under 500 Units
Since crossing 500 units drastically increases your bill, it’s smart to keep your bimonthly usage somewhere around 450–490 units. Here are 5 easy habits that actually help:
Set AC temperature to 24°C–26°CRunning AC at 18°C forces the compressor to run non-stop. Keeping it at 24°C combined with ceiling fans saves up to 25% energy.
Check your White EB Card mid-cycleTake your own reading around day 30. If you are already past 230 units, cut down on AC and geysers to prevent crossing 500 on day 60.
Switch to LED bulbs completelyReplace old incandescent bulbs. A 9W LED bulb provides the equivalent brightness of a 60W bulb but draws 85% less power.
Unplug idle appliances (Vampire Loads)TVs, microwaves, and chargers on standby draw small, constant current. Shut off main sockets when they are not actively in use.
Get heavy appliances serviced yearlyScaling in geysers and dust on AC filters forces them to draw higher current. Regular servicing prevents scaling and high bills.
Frequently Asked Questions (FAQ)
Got some quick questions about domestic EB billing, telescopic slabs, or the free electricity subsidy? Here are direct answers to the most common ones:
Yes, but only if your total bimonthly consumption is 500 units or less. In that case, the first 200 units are completely free. If your usage goes above 500 units, the free units reduce to 100.
For usage above 500 units, TANGEDCO applies a telescopic rate structure where different unit ranges are charged progressively higher rates, and your free units subsidy shrinks from 200 to 100 units.
Yes, the subsidy is linked directly to the domestic service connection and total consumption slab, regardless of whether the home is occupied by the owner or a tenant.
If your bimonthly consumption is exactly 500 units, you are categorized under the “500 units or less” slab, qualifying you for the full 200 free units subsidy.