Estimate Tamil Nadu electricity bills using slab-wise tariff logic, telescopic calculation, and the May 2026 domestic subsidy update context.
Note: This estimator is primarily designed for Domestic (LT-IA) billing, with a practical commercial estimate mode and public-policy update reference. Online Bill Estimator
Domestic mode in this calculator uses fixed charge as Rs. 0.
Estimation only: this is an independent, unofficial reference tool. It is not affiliated with TANGEDCO, TNEB, or the Government of Tamil Nadu. Final payable amount may differ due to FSA, taxes, meter rent, arrears, and official billing adjustments.
For consumers using 500 units or below (new scheme - 200 free units):
| Units Consumed (Bi-monthly) | Rate Per Unit |
|---|---|
| 1 - 200 units 200 free units for domestic consumers up to total usage of 500 units. | Rs. 0 (new scheme free units) |
| 201 - 400 units | Rs. 4.70 / unit |
| 401 - 500 units | Rs. 6.30 / unit |
For consumers using above 500 units (existing tariff - 100 free units):
| Units Consumed (Bi-monthly) | Rate Per Unit |
|---|---|
| 1 - 100 units | Rs. 0 (100-unit subsidy) |
| 101 - 400 units | Rs. 4.70 / unit |
| 401 - 500 units | Rs. 6.30 / unit |
| 501 - 600 units | Rs. 8.40 / unit |
| 601 - 800 units | Rs. 9.45 / unit |
| 801 - 1000 units | Rs. 10.50 / unit |
| Above 1000 units | Rs. 11.55 / unit |
Many billing issues are avoidable. Review these frequent mistakes to prevent unnecessary charges.
Compare present reading in the bill with a photo of your meter taken on reading day. Small mismatches can inflate the payable amount.
Crossing 500 units can trigger higher telescopic repricing. Staying just below this level can reduce the total bill significantly.
Arrears can appear due to adjustment or posting delays. Confirm pending dues in the official portal before assuming everything is cleared.
If meter access is blocked, estimated billing may be used and corrected later, causing sudden adjustment in future cycles.
Raise complaint quickly with evidence. Delay can increase service risk and make corrections slower.
No. This is an independent estimation tool. Official billing, payment, and account records are available only through official TANGEDCO channels.
No. This estimator mainly covers slab-wise energy charges. Official bills can include FSA, taxes, meter rent, arrears, and other adjustments.
Tamil Nadu uses telescopic billing. After crossing 500 units, subsidy tier changes and slab treatment can increase total energy charge faster.
FSA is a periodic per-unit adjustment used by utilities to recover procurement cost variations. It can change your final bill beyond base slab charges.
For domestic bi-monthly usage up to 500 units, first 200 units are treated as free. If usage exceeds 500 units, this model applies first 100 units as free.
Consumer number is printed on your electricity bill and usually available on service records or meter-related documents.
No. This platform provides estimation only. Use official TANGEDCO payment channels for transactions.
It is intended for practical estimation and planning. Final payable amount can vary due to official rounding, adjustments, and charges not modeled here.
