TNEB Bill Calculator (May 2026 Updated Tariff)
Instantly calculate your TNEB / TANGEDCO electricity bill online with updated 2026 tariff slabs, bi-monthly billing cycle, and 200 units free subsidy for domestic consumers in Tamil Nadu.
• > 500 Units: First 100 Units FREE.
• Fixed Charges: ₹0.00 (Domestic LT-1A)
Slab-wise Tariff Calculation Breakdown:
| Consumption Slab | Units Used | Rate (₹/Unit) | Amount (₹) |
|---|
What is a TNEB Bill Calculator
A TNEB bill calculator is a simple online tool that tells you how much your TANGEDCO electricity bill will be, before the actual bill lands in your hand or your inbox. You enter the number of units your meter shows for the current bi-monthly cycle, and the tool applies the correct TNEB slab rate 2026, the 200 units free subsidy, and any fixed charges that apply to your connection type (LT-1A domestic).
Tamil Nadu’s electricity billing is not flat-rate. TANGEDCO charges different rates depending on how much power you use in two months, and the rate changes as you cross each slab. This is what shows up when people search for the TNEB tariff details 2026 or the TNEB tariff list PDF 2026, they’re trying to understand why their bill isn’t just units multiplied by one fixed number. On top of that, the state government’s free electricity scheme gives the first 200 units at zero cost if your total consumption is under 500 units, or 100 units free if you cross 500. Most people don’t sit and calculate this manually every two months, and honestly, doing it by hand is easy to get wrong because the slabs don’t work like a simple multiplication. Each block of units is charged at a different rate.
This TNEB bill calculator does that slab-by-slab math for you and shows the final number, along with how much subsidy you saved.
How to Use the TNEB Bill Calculator (Step-by-Step Guide)
Calculating your Tamil Nadu electricity bill takes less than 30 seconds. Follow these 5 simple steps to get an instant, accurate slab-wise breakdown for your home or residential connection:
Look at your digital TNEB electricity meter. Wait until the display cycles to the cumulative kWh (kiloWatt-hour) reading. Subtract the previous reading shown on your last TANGEDCO bill from the current meter reading (Current Units − Previous Units = Consumed Units). If you already know your unit total, simply use that number.
Click the connection category dropdown above. For standard houses, villas, and independent apartments, keep it set to Domestic / Home (LT-1A). If you are calculating for residential handlooms, huts, agriculture, or common apartment services (LT-1D/1E), pick your specific category so the correct tariff rules apply.
Type your bi-monthly unit count into the Units Consumed (kWh) field. You can also click any of our quick-preset chips (such as 100, 200, 300, 450, 500, 600, 800) to check common household consumption scenarios with a single click.
Click the green Calculate Bill button (or just type your units; the calculator updates dynamically in real-time). The tool instantly processes your consumption through TANGEDCO’s official bi-monthly tariff algorithms.
Check the results panel on the right. You’ll see your Total Payable Amount in big bold text, your Government Subsidy Savings badge (up to ₹990 saved), and a complete transparent slab table showing exactly how many units were billed at ₹0.00, ₹4.95, or ₹6.65+.
Pro-Tip for Maximum Subsidy Savings:
Tamil Nadu electricity billing operates on a bi-monthly (60 days) cycle. If your meter reading is nearing the 500-unit threshold (e.g., around 480–495 units) with a few days left before the assessor visits, keeping your consumption strictly under 500 units ensures you keep the full 200 free units subsidy. Crossing just 501 units cuts your free subsidy to 100 units and instantly adds over ₹900 to your bill!
Why You Need to Use This Tool
Here’s a real situation. Say your meter reading shows 420 units consumed for the bi-monthly cycle, and you’re trying to figure out the TNEB unit rate for house 2026 before the bill actually arrives. If you just multiply 420 by a flat rate you saw somewhere online, you’ll get a wrong number. Sometimes way off, sometimes on the higher side, sometimes lower. That’s because:
- The first 200 units are free (₹0).
- Units 201 to 400 are charged at ₹4.95 per unit.
- Units 401 to 420 (the remaining 20 units) are charged at ₹6.65 per unit.
Nobody gets this right in their head on the first try, and that’s exactly the gap this tool fills. It’s the same logic behind an EB reading calculation chart 2026, just this math laid out visually instead of typed into a calculator app.
There are a few practical reasons people look up a TNEB bill calculator before their TANGEDCO bill actually arrives.
If you know your bill is going to be around ₹1,100 instead of assuming it’ll be low because “only 200 units are free,” you won’t get caught off guard. This matters even more now with the new EB tariff in Tamil Nadu 2026, since the slab boundaries and per-unit charges have shifted from the older rate card.
TANGEDCO bills sometimes have reading errors, wrong slab application, or fixed charge mismatches. Running your own units through the calculator lets you cross-check the number before you pay. It also clears up the common question of what the fixed charges are in a TNEB bill. For LT-1A domestic connections, it’s ₹0, so if your bill shows a fixed charge line item, that’s worth a second look.
If you’re close to crossing 500 units, you might want to shift laundry or AC usage to the next cycle to avoid losing the 200-unit free slab and dropping into the 100-unit free slab instead. That one decision can change your bill by hundreds of rupees.
If you’ve just moved to Tamil Nadu or got a new domestic connection, you probably don’t know the slab structure at all. The calculator explains the electricity bill unit price in Tamil Nadu through the number itself, so you don’t need to sit and read a tariff order just to figure out how to calculate your EB bill for a house in Tamil Nadu.
Key Features of Our TNEB Bill Calculator
TNERC (Tamil Nadu Electricity Regulatory Commission) revises tariff orders periodically, and TANGEDCO applies them from the notified date. Our calculator uses the current approved TNEB tariff rates 2026, not an old table that’s been sitting online since 2022.
Since TANGEDCO bills domestic consumers every two months, not monthly like some other states, the calculator is built around that same cycle. You put in the total units for the two-month period, not a monthly estimate, so the output matches what actually shows up on your paper or e-bill.
You don’t need to manually subtract anything. The tool checks whether your total consumption is under 500 or over 500 units, and automatically applies either the 200-unit or 100-unit free subsidy rule before calculating the paid slabs. It’s the same logic used to work out the 1 unit electricity cost in Tamil Nadu 2026 for any household.
Instead of showing you one lump sum, the calculator shows exactly how many units fell in each TNEB slab rate 2026 band and what that block cost. So if your bill is ₹1,123, you can see the ₹0 + ₹990 + ₹133 split, which makes it obvious where your money actually went.
This tool is dedicated to LT-1A domestic connections, the category most people are looking for when they search for a TNEB bill calculator for domestic or residential use. It’s not trying to double up as a commercial or industrial calculator, so the slab logic stays accurate for home consumers.
You type in units, get your number, done. Nothing gets saved on a server, and you don’t need to create an account to use it.
Most people check their meter reading standing next to the meter box with their phone in hand. The tool is built to work on a small screen without pinch-zooming into a table.
Why We Are the Best Option for This
There are other TNEB bill calculators online, but most of them fall into one of two problems. Either they use outdated tariff tables from a previous TNERC order, or they apply a flat rate across all units instead of doing the correct slab-by-slab split.
We update the TNEB tariff rates 2026 the same cycle TNERC and TANGEDCO revise them, so you’re not calculating your bill against numbers that stopped being accurate months ago. Second, our logic mirrors the actual TANGEDCO billing engine. The 500-unit threshold rule, the free-unit reset from 200 to 100, and the slab boundaries are applied exactly the way TANGEDCO applies them on your real bill, not a simplified or rounded version.
We also don’t hide the math. A lot of calculator tools just show you a total and expect you to trust it. We show the slab breakdown so you can verify it yourself, line by line, the same way you’d check a grocery bill.
And because this tool is focused only on domestic households, you’re not stuck using a generic EB bill calculator that was really built for a different consumer category.