Free tool 2026 slab rates
TNEB EB Bill Calculator 2026
Enter your two-month units or meter readings to see your Tamil Nadu domestic EB bill, slab by slab, including the 200 free units and the 500-unit jump.
Estimated bill for 650 units (two months)
₹3,300
about ₹1,650 per month
| Slab (units) | Units | Rate | Amount |
|---|---|---|---|
| 1 - 100 | 100 | Free | ₹0 |
| 101 - 400 | 300 | ₹4.50 | ₹1,350 |
| 401 - 500 | 100 | ₹6.00 | ₹600 |
| 501 - 600 | 100 | ₹8.00 | ₹800 |
| 601 - 800 | 50 | ₹9.00 | ₹450 |
| Fixed charge (approx.) | ₹100 | ||
Approximate estimate using TNEB domestic slab rates (2026). Compare with your TNPDCL bill.
Want this bill close to zero?
For 650 units every two months, a rooftop solar system of about 2.5kW would cover most of it. Eligible Tamil Nadu homes get up to ₹1 lakh subsidy for 3kW and above.
200
free units under 500
500
unit jump point
₹11
top slab per unit
TNEB Domestic Slab Rates 2026
| Two-month units | Up to 500 used | Above 500 used |
|---|---|---|
| 0 - 100 | Free | Free |
| 101 - 200 | Free | ₹4.50 |
| 201 - 400 | ₹4.50 | ₹4.50 |
| 401 - 500 | ₹6.00 | ₹6.00 |
| 501 - 600 | - | ₹8.00 |
| 601 - 800 | - | ₹9.00 |
| 801 - 1,000 | - | ₹10.00 |
| Above 1,000 | - | ₹11.00 |
Approximate per-unit rates; fixed charges are extra. Worked examples and the full explanation: TNEB slab rates and EB bill calculation. Typical bills by home size: average electricity bill in Tamil Nadu.
Common Questions
How is the EB bill calculated in Tamil Nadu?
TNEB (TNPDCL) bills domestic homes every two months using telescopic slabs. If you use 500 units or less in two months, the first 200 units are free; above 500 units only the first 100 units are free and higher slab rates apply. A fixed charge is added.
What is the EB unit rate in Tamil Nadu in 2026?
For homes under 500 units: 0-200 free, 201-400 about ₹4.50 and 401-500 about ₹6 per unit. Above 500 units: 0-100 free, 101-400 about ₹4.50, 401-500 ₹6, 501-600 ₹8, 601-800 ₹9, 801-1,000 ₹10 and above 1,000 ₹11 per unit (approximate; check your bill).
Why does my bill jump after 500 units?
Crossing 500 units in a two-month cycle removes the extra 100 free units and moves your top units into the ₹8-11 slabs, so a small increase in use can raise the bill sharply.
Is this calculator accurate for my bill?
It gives a close estimate using the published domestic slab structure. Your actual bill may differ slightly because of the exact fixed charge, adjustments or tariff updates, so always compare with your TNPDCL bill.
How much solar do I need to bring my bill down?
Roughly, a 1kW system makes about 250 units every two months in Tamil Nadu. Divide your two-month units by 250 to get the kW you need; most homes with one AC need 3kW and homes with two ACs need about 5kW.
Bill too high? Read why your EB bill is high in summer and how to reduce your electricity bill.