Tamil Nadu electricity bill tracker
Halfway through the billing cycle? Enter your meter reading to see where this TNPDCL bill is heading, and how many units a day keep it under the next slab.
- Projects the bill from your pace
- Warns before slab jumps
- Tamil Nadu tariff of 30 June 2025
Slab limits in Tamil Nadu
These are the points where the Tamil Nadu home tariff moves to a higher rate. The last column is the daily use that keeps a 60-day bill under each limit.
Up to 500 units in a 2-month bill
| Slab limit in a 2-month bill | Rate you pay above it | Units a day to stay under |
|---|---|---|
| 200 units | ₹4.70 | 3.3 |
| 400 units | ₹6.30 | 6.7 |
Above 500 units
| Slab limit in a 2-month bill | Rate you pay above it | Units a day to stay under |
|---|---|---|
| 100 units | ₹4.70 | 1.7 |
| 400 units | ₹6.30 | 6.7 |
| 500 units | ₹8.40 | 8.3 |
| 600 units | ₹9.45 | 10.0 |
| 800 units | ₹10.50 | 13.3 |
| 1000 units | ₹11.55 | 16.7 |
From the tariff the calculator uses. A State free-units scheme can add its own limit; the tracker shows it when it applies.
Bill by daily use in Tamil Nadu
What a steady daily use adds up to on the Tamil Nadu tariff. Compare it with your own pace from the tracker.
| Units a day | Units in a 2-month bill | Bill a month |
|---|---|---|
| 1.7 | 100 | ₹0 |
| 3.3 | 200 | ₹0 |
| 5.0 | 300 | ₹235 |
| 6.7 | 400 | ₹470 |
| 10.0 | 600 | ₹1,440 |
| 16.7 | 1000 | ₹3,435 |
Urban home, 2 kW, the calculator’s default options, with any State free-units scheme. A 30-day month.
About the tracker
How does the tracker project my bill?
It divides the units you have used so far by the days since your last reading, and multiplies by the days in your billing cycle. Then it runs that projection through your state’s tariff, the same way the bill calculator does.
Where do I find the reading on my last bill?
Every bill prints a “present reading” or “current reading”. That is the starting point for this cycle. Today’s reading is on the meter display; on most digital meters it is the kWh figure.
What is a cliff?
A point where one extra unit adds a lump sum to the bill, not just that unit’s price. It happens where a state re-rates every unit once you cross a line (Kerala above 250 units a month, Tamil Nadu above 500 in two months) or where the fixed charge steps up with use. The tracker tells you how many units a day keep you under it.