TNEB Bill Calculator
Estimate Your Tamil Nadu Electricity (EB) Bill
Enter your bi-monthly meter reading or units consumed for an accurate slab-by-slab TANGEDCO bill breakdown with Fuel Cost Adjustment (FCA), fixed charges, and free unit subsidy included.
மின்னணுக் கணக்கீடு — 2026 TANGEDCO தொகுப்பு
TNEB 2026 Tariff Alert
Tamil Nadu · TANGEDCO Domestic
2026 Tariff Revision
TANGEDCO filed for a 12% average tariff hike with TNERC in FY2026. The slab structure remains at 4 tiers for domestic consumers.
TNEB Bi-Monthly — Key Facts
- Billing Cycle60 days (every 2 months)
- Meter Read CitiesChennai, Coimbatore, Madurai, Salem
- Bill Issue Date~2 weeks after reading
- Online PaymentTNEB Portal, BBPS, Paytm
- TNEB Helpline1912 (24×7)
Solar can wipe your TNEB bill
A 2kW rooftop solar system generates ~240 units/month in Tamil Nadu — wiping the 201–500 slab entirely. PM Surya Ghar subsidy up to ₹78,000 applies.
TN Solar ROI CalculatorTNEB Slab Optimizer — Know Your Exact Unit Limit
Set a target monthly spend and we'll show you the maximum units you can consume to stay within each slab boundary. Stop guessing — start planning.
Your maximum acceptable TNEB bill including FCA + fixed charge
TNEB 2-மாத கணக்கீடு — The 2-Month Rule
How TANGEDCO calculates your bill differently from every other DISCOM in India — and why most national calculators give you wrong numbers.
Worked Example: 340 Units
Bi-monthly consumption · Single phase
Monthly average: ₹733/month
Why TNEB is Different
- TNEB reads your meter every 60 daysMost other DISCOMs bill monthly (30 days)
- Slabs apply to total 2-month consumptionYou cannot halve your reading to find your slab
- One fixed charge per bi-monthly billYou pay ₹100 once — not twice
- FCA (Fuel Cost Adjustment) added per unitAppears as "Fuel Surcharge" on your physical bill
Slab Management Tip — குறைந்த தட்டில் இருங்கள்
If you are at 480 units, cutting just 20 units over 3 days saves you from the ₹6.40 slab. The boundary jump (₹4.80 to ₹6.40) is worth ₹320 in savings for every 200 units kept below 500.
Audit your AC contribution to slab jumping →Common TNEB Bill Traps
Situations that cause unexpected bill spikes in Tamil Nadu
The 501-Unit Trap
Using 501 units vs 499 units costs ₹32 more for just 2 units — because you cross into the ₹6.40 slab. Every unit above 500 costs 33% more.
Summer Spike (May–June)
AC usage in peak Tamil Nadu summer can push bi-monthly consumption from 300 to 700 units — tripling your bill from ~₹1,600 to ~₹4,500.
Reading Delay Trap
When the bi-monthly reading is delayed by 10–15 days, your next bill covers 75 days not 60. This can artificially push you into a higher slab.
How Your TNEB / EB Bill Is Calculated
TANGEDCO (Tamil Nadu Generation and Distribution Corporation) calculates your electricity bill using a progressive slab system. This means the more electricity you use, the higher the rate you pay — but only on the portion that falls into higher slabs. You never pay the highest rate on all your units.
Step-by-Step: How Your EB Bill Amount Is Determined
- 1
Meter reading is taken every 60 days
A TANGEDCO meter reader visits your home and notes the current reading. Your previous reading (from 60 days ago) is subtracted to get your bi-monthly units consumed.
- 2
Units are split across four slabs
Your total bi-monthly units are divided into the four slab blocks shown in the table below. You pay each slab rate only on the units falling within that block.
- 3
Fuel Cost Adjustment (FCA) is added
A variable surcharge of approximately ₹0.35 per unit is added to reflect fuel procurement costs. This appears as a separate line on your physical bill.
- 4
Fixed charge is added
₹100 is added for single-phase connections or ₹200 for three-phase connections. This is a flat fee, not based on usage.
- 5
Subsidy is deducted (if eligible)
BPL card holders and eligible consumers receive 100 free units per bi-monthly bill. The subsidy is applied to the first slab.
Quick Example
If you used 340 bi-monthly units (single phase): 100 × ₹2.25 = ₹225 + 100 × ₹3.50 = ₹350 + 140 × ₹4.80 = ₹672 + FCA of ₹119 (340 × ₹0.35) + fixed charge ₹100 = ₹1,466 total. That is about ₹733 per month.
TNEB Domestic Tariff Slab Table (2026)
These are the official TANGEDCO domestic tariff rates applicable for all residential consumers in Tamil Nadu. Rates are per bi-monthly (60-day) billing cycle.
| Slab | Unit Range (Bi-Monthly) | Rate Per Unit | Notes |
|---|---|---|---|
| Slab 1 | 0–100 units | ₹2.25 | Lowest slab — free for BPL/eligible consumers |
| Slab 2 | 101–200 units | ₹3.50 | +55% jump from slab 1 |
| Slab 3 | 201–500 units | ₹4.80 | Most Tamil Nadu homes fall here |
| Slab 4 | 501+ units | ₹6.40 | Highest slab — AC-heavy homes pay this |
Fixed Charge (Single Phase)
₹100 / bill
Fixed Charge (Three Phase)
₹200 / bill
Fuel Cost Adjustment
₹0.35 / unit
Important: TNEB bills are bi-monthly, so a slab applies to 60 days of usage. For example, the "0–100 unit" slab means 0–100 units over two months (approximately 0–50 units/month). Do not compare these slab thresholds directly with monthly-billing DISCOMs like MSEDCL or BESCOM.
Frequently Asked TNEB / EB Bill Questions
How is my TNEB EB bill calculated?
TNEB (TANGEDCO) uses a progressive slab system. Your bi-monthly (60-day) units are split into four blocks. The first 100 units cost ₹2.25 each, the next 100 cost ₹3.50 each, the next 300 cost ₹4.80 each, and anything above 500 costs ₹6.40 each. A Fuel Cost Adjustment of ₹0.35 per unit and a fixed charge (₹100 for single phase or ₹200 for three phase) are added to get your total bill.
What does "EB" mean on my TNEB bill?
EB stands for "Electricity Board" — it is the common name for TNEB/TANGEDCO in Tamil Nadu. When people say "EB bill" or "EB card," they are referring to their Tamil Nadu electricity bill. "EB reading" means the meter reading taken by TANGEDCO.
Why does TNEB bill every 2 months instead of monthly?
TANGEDCO operates on a bi-monthly (every 60 days) billing cycle as mandated by TNERC. This means your slab rates apply to two months of consumption, not one. A bill showing 400 units means you used approximately 200 units per month. This is different from most other Indian states, which bill monthly.
What is 1 unit in TNEB billing?
1 unit equals 1 kilowatt-hour (kWh) of electricity. For example, running a 100-watt bulb for 10 hours uses exactly 1 unit. Running a 1.5-ton AC (approximately 1,500 watts) for 1 hour uses about 1.5 units. Your TNEB bill shows total units consumed over the 60-day billing period.
How do I read my TNEB EB meter?
Your TNEB meter shows a cumulative number in kWh. To calculate your bi-monthly usage: subtract the previous reading (printed on your last bill) from the current reading. The difference is your units consumed. TANGEDCO meter readers visit every 60 days to record this reading.
Want to understand your full EB bill?
Learn how to read every section of your TANGEDCO electricity bill — meter reading, slab charges, FCA, fixed charges, taxes, and how to spot billing errors.
சூரிய மின்சாரம் — How Solar Affects Your TNEB Bi-Monthly Bill
Tamil Nadu gets 5.5–6.2 peak sun hours/day. Under TNERC net metering, your solar export credits offset the next bi-monthly reading — keeping you permanently in the lower slabs.
Pushes most homes from slab 3 to slab 1
Virtually eliminates a 500-unit household bill
Net metering credit carries forward to next bill
How TNEB Net Metering Works
- 1
Install MNRE-approved solar panels (TNERC approved installer)
- 2
Apply for net meter at TANGEDCO office — approval in 30–45 days
- 3
Bi-monthly reading captures: Grid consumed MINUS Solar exported
- 4
If export > import, surplus credit rolls to next bi-monthly bill
- 5
PM Surya Ghar subsidy: ₹30,000 for 1kW, ₹60,000 for 2kW, ₹78,000 for 3kW
TN Solar ROI — Quick Math
Chennai · 2kW system · PM Surya Ghar
Uses official TNERC net metering rates · MNRE subsidy data
At TNEB / TANGEDCO's top slab of ₹6.40/unit, here's what each upgrade saves you
Every rupee saved at the top slab counts double — it also keeps you out of higher tiers
Affiliate links · No extra cost
Atomberg Renesa BLDC Fan
28W vs 75W × 10hr/day × 365 days
5-Star vs 3-Star AC (1.5T)
30% less power × 8hr × 90 summer days
HomeMate AC Schedule + Tapo P110
Auto-shutdown saves 12% on AC × 8hr × 90 days
V-Guard iMagno 410 Stabilizer
Compressor protection = ₹8,000–₹15,000 repair avoided
Combined savings potential: A BLDC fan + 5-star AC upgrade together could save you ₹2,757/year at TNEB / TANGEDCO's ₹6.40 top slab — that's roughly 36 units saved per month.
How Does TANGEDCO Compare?
Side-by-side tariff context with neighboring DISCOMs — see if your state is low, mid, or high cost.
60-day billing cycle
View Full Calculator6-slab progressive
KSEB CalculatorIndia's cheapest Slab 1
TSSPDCL Calculator5-slab, Bangalore
BESCOM CalculatorTop Slab Rate Comparison
Top slab rate at 300+ units/month · Source: Official SERC tariff orders 2026
4 Tools That Cut 200,000+ Indian Bills
These products are the most impactful bang-for-rupee upgrades based on our analysis. Combined annual savings: ₹2,400–₹4,800.
Tapo P110 16A Smart Plug
Monitor every appliance's power live
Real-time energy tracking per device
View on Amazon
Atomberg Renesa BLDC Fan
Runs on 28W — cuts fan bill by 65%
BEE 5-star · Remote control · Sleep mode
View on Amazon
V-Guard iMagno 410
Protect your AC from voltage surges
90–290V wide range · Auto reset · Delay
View on Amazon
HomeMate Smart IR Hub
Schedule any AC from your phone
Works with any IR AC · Alexa/Google
View on AmazonAmazon Associate Programme · We earn a small commission at no extra cost
Your TNEB Bill Has Layers — Audit Each One
The calculator gives you the number. These tools help you cut it.
Is Your AC Pushing You into the ₹6.40 Slab?
A 1.5T 3-star AC running 8h/day adds ~240 units/month to your TNEB bill — that is 480 bi-monthly units, right at the danger zone.
Reduce Your TNEB Consumption — மின்சாரம் சேமி
These 10 energy tips are tailored for Indian middle-class homes — LED swap, AC thermostat, and phantom load elimination.
Best 5-Star BLDC Fan to Lower Your TNEB Slab
Atomberg Renesa+ uses just 28W vs 75W for a regular fan — replace 3 fans and save ~40 units/bi-monthly bill.
TN Solar Calculator — TANGEDCO Net Metering
See exactly how many panels you need to wipe your bi-monthly TNEB bill — with PM Surya Ghar subsidy applied.
How to Read Your TNEB / EB Meter Reading
Learn to decode every section of your TANGEDCO electricity bill — meter readings, slab charges, FCA, fixed charges, and how to dispute errors.
All TANGEDCO tariff data is sourced from TNERC official orders
Every slab rate, fixed charge, and FCA value on this page is verified against the 2026–27 TNERC tariff order. Our team stress-tests each calculator against real sample bills.
Meet The DU Tech TeamTNEB FAQ — Frequently Asked Questions
The most searched TANGEDCO queries — answered precisely.
In 2026, 1 unit (kWh) in TNEB costs: ₹2.25 for the first 100 units, ₹3.50 for 101–200 units, ₹4.80 for 201–500 units, and ₹6.40 for units above 500. These are bi-monthly slab rates — applied to your total 2-month consumption.