Complete guide to electricity rates and appliance running costs in Patna. Bihar tariff: ₹6/unit.
Three things decide your monthly AC bill in Patna: the local tariff (you pay ₹6/unit on the slab shown above), the efficiency of the unit (a 5-star inverter draws far less than an older 3-star of the same size), and your usage — with humid subtropical conditions, households here run their AC around 13 hours a day through the peak months, and every extra hour adds directly to the bill.
The biggest lever most people miss is right-sizing: an undersized AC runs flat-out and never quite cools, while an oversized one short-cycles and wastes power. Match the tonnage to your room with the tonnage calculator, then pick the star rating that pays back for your hours using the BEE star rating guide. Set the thermostat near 24–26°C rather than the lowest setting, keep filters clean, and shade the outdoor unit — each meaningfully cuts consumption.
To see exactly what your own setup costs in Patna, run your tonnage, star rating, and daily hours through the Patna AC bill calculator — it applies the Bihar rate so the estimate reflects what you actually pay.
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