TNEB Bill Calculator is an independent, free tool built to help domestic electricity consumers in Tamil Nadu understand exactly how their TANGEDCO bill is calculated — and, since May 2026, to compare the old tariff against the new 200-units-free scheme side by side.
Most people only find out what they owe when the bill lands in their hands or on the TNEB app, with no clear breakdown of how the slab rates were applied. Tamil Nadu's domestic tariff is telescopic — meaning different portions of your usage are billed at different rates — which makes manual calculation confusing for most households. This tool does that math instantly and shows the working, slab by slab, in both English and Tamil.
Rates used in this calculator are sourced from the TNERC Tariff Order effective 1 July 2024, and from the Tamil Nadu government's May 2026 order on the 200-units-free scheme. Where official slab rates for the new scheme haven't yet been formally notified, this is clearly marked, and the closest available estimate is used. If you spot a rate that looks outdated, please let us know.