TNEB Commercial Bill Calculator (May 2026 Updated Tariff)
Accurately calculate your TANGEDCO commercial electricity bill online with updated 2026 LT-V tariff slabs, connected load demand charges, and 5% electricity duty for shops, offices, and businesses in Tamil Nadu.
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What is a TNEB Commercial Bill Calculator
A TNEB bill calculator for commercial connections is a tool that works out how much your TANGEDCO electricity bill will be for a shop, office, restaurant, clinic, or any other business connection under Tariff LT-V. You enter your sanctioned load in kW and your bi-monthly unit consumption, and this commercial EB bill calculator applies the correct energy charges, fixed demand charges, and the 5% electricity duty that TANGEDCO adds on top.
Commercial billing in Tamil Nadu works very differently from a domestic connection, and that’s usually where the confusion starts. A shop owner who’s used to hearing about “free units” from their home bill often assumes something similar applies to their business meter too. It doesn’t. Under LT Tariff V, there are zero free units. Billing starts from the very first unit, and the moment your consumption crosses 100 units in a cycle, every single unit gets charged at the higher rate, not just the units above 100. On top of that, there’s a fixed demand charge based on your sanctioned load in kW, whether you use that full load or not, and a 5% electricity duty applied to the energy charges.
This TNEB commercial tariff calculator handles all three parts together and shows you where each rupee of your bill actually came from.
How to Use the Commercial Bill Calculator (5-Step Guide)
Calculating your commercial TANGEDCO power bill is simple and takes less than 30 seconds:
Pick your category: LT-V Commercial (for standard shops, offices, bakeries, and showrooms), LT-IIB (for private schools, colleges, and private hospitals), or LT-IIIC (for temporary construction and commercial supplies).
Most Low Tension (LT) commercial connections in Tamil Nadu follow a Bi-monthly (60 days / 2 months) billing cycle. If your connection is billed every month, switch to Monthly (30 days).
Input your approved connected load in kW (e.g. 3 kW, 5 kW, 10 kW). You can check your previous physical TNEB bill slip under the “Sanctioned Load” field or use our quick load preset buttons.
Type your cumulative units consumed during the billing cycle (Current Meter Reading − Previous Meter Reading), or select one of the quick unit preset chips (such as 100, 250, 500, 1,000, 2,000 units).
The tool instantly calculates and displays your Net Total Payable Amount, split clearly into Energy Charges, Fixed Load Demand Charges, and 5% Tamil Nadu Electricity Duty.
Pro-Tip on the 100-Unit Threshold for Commercial Shops:
Under LT Tariff V, small shops that consume up to 100 units bi-monthly enjoy a concessional rate of ₹6.65 per unit. However, if total consumption exceeds 100 units, all units are billed at the higher rate of ₹10.45 per unit. For small businesses near the 100-unit mark, monitoring usage can save hundreds of rupees per cycle!
Why You Need to Use This Tool
Here’s where most shop owners get their bill estimate wrong. Say you run a standard retail shop or small office with a 5 kW sanctioned load and you use 350 units in a bi-monthly cycle. If you assume the first 100 units are billed at the lower rate and only the units above that jump to the higher rate, like a domestic slab, you’ll underestimate your bill by a wide margin.
That’s not how LT-V works. The moment your total crosses 100 units, the entire consumption, all 350 units, gets billed at ₹10.45 per unit, not just the units beyond 100. Here’s the actual math using this commercial bill calculator’s logic:
- Energy charges: 350 × ₹10.45 = ₹3,657.50
- Fixed demand charges: 5 kW × ₹220 (bi-monthly) = ₹1,100.00
- 5% electricity duty on energy charges: 5% × ₹3,657.50 = ₹182.88
Someone expecting a telescopic slab structure, where only units above 100 get the higher rate, would calculate a number far lower than this and be caught off guard when the real bill arrives. This threshold-based jump is the single biggest reason business owners search for a TNEB commercial tariff calculator, or simply an EB calculator for commercial use, before assuming anything about their bill.
There are a few concrete reasons a TN commercial EB bill calculator matters for a business:
Working capital and expense planning
For most small shops, the electricity bill is the second biggest recurring cost after rent. Knowing the number in advance, rather than being surprised by it every two months, makes cash flow planning a lot easier.
Checking if your sanctioned load is oversized
A lot of shops have a 10 kW connection sanctioned when their actual daily usage barely needs 4 kW. Since fixed demand charges are billed on the sanctioned load and not on what you actually use, every unused kW is pure waste. At ₹220 per kW every bi-monthly cycle, an oversized connection quietly drains money month after month. Running your numbers through this commercial electricity bill calculator makes this waste visible, and gives you a real figure to bring up when applying for a load reduction.
Settling landlord and tenant disputes over shared meters
In commercial complexes with one main meter and separate sub-meters for tenants, arguments over how to split the ₹10.45 rate and the fixed demand charge are common. A calculator that breaks the bill into energy charges, demand charges, and duty separately gives both sides a transparent number to work from instead of guessing.
Watching the 100-unit threshold closely
If your shop typically consumes somewhere between 90 and 110 units in a cycle, this is the one number worth tracking. Going from 98 to 102 units doesn’t add a small amount to your bill, it pushes your entire consumption from ₹6.65 per unit to ₹10.45 per unit. That’s the kind of jump nobody expects until they’ve been hit by it once, which is exactly why a reliable commercial bill calculator matters more here than it does for a domestic connection.
Key Features of Our TNEB Bill Calculator for Commercial Use
This EB bill calculator for commercial connections follows the actual non-telescopic, threshold-based structure that applies to businesses. It doesn’t borrow domestic slab logic and try to force it onto a business bill, which is where most generic calculators labeled “commercial eb bill calculator” go wrong.
The calculator checks your total bi-monthly consumption and applies ₹6.65 per unit if you’re at or under 100 units, or ₹10.45 per unit across your entire consumption if you cross that mark. No manual adjustment needed.
You enter your sanctioned load in kW, and the tool applies the correct bi-monthly demand charge slab, ₹220 per kW up to 50 kW, ₹664 per kW for loads between 51 and 112 kW, and ₹1,216 per kW above 112 kW. This is one part of the bill that has nothing to do with how many units you actually consumed, and a lot of shop owners don’t realize that until they see it calculated separately.
The Tamil Nadu Electricity Duty is applied on top of the energy charges, and the calculator adds this in automatically so the final number matches what actually shows up on your TANGEDCO bill.
Instead of one lump sum, you see energy charges, fixed demand charges, and duty as three separate line items. If your bill is ₹4,940, you can see exactly how ₹3,657.50 in energy charges, ₹1,100 in demand charges, and ₹182.88 in duty add up to that number.
Alongside standard LT-V shops and offices, this commercial EB rate calculator also handles LT-IIB (private schools, colleges, and hospitals at a flat ₹8.05 per unit) and LT-IIIC (temporary commercial supply for construction sites and events at a flat ₹13.25 per unit), so you’re not stuck using a generic tool that only covers the standard shop category.
You enter your load and units, get your number, and that’s it. No account needed, and this shop EB bill calculator works fine on a phone screen if you’re checking it standing next to your shop’s meter.
Why We Are the Best Option for This
Most tools labeled as a commercial electricity bill calculator or a shop EB bill calculator online are really just domestic calculators with the numbers swapped out, and they still apply a telescopic slab structure that doesn’t exist for LT-V connections. That single mistake alone can throw off a bill estimate by thousands of rupees once you cross the 100-unit mark, since the entire consumption gets re-rated, not just the extra units.
We built this TNEB bill calculator for commercial connections around the actual LT-V structure: zero free units, a hard threshold at 100 units, demand charges tied to sanctioned load, and the 5% duty layered on top. Every one of these four components is calculated separately and shown to you, so you’re not trusting a black-box number.
We also cover the categories that most commercial calculators ignore entirely, like private schools, hospitals, and temporary event connections, which fall completely outside the standard shop and office rate. If you’re specifically searching for how to calculate a commercial electricity bill in Tamil Nadu, or looking for the current TNEB commercial tariff rates 2026, this is the number the calculation is actually built on.
Frequently Asked Questions