The electricity per unit rate in Assam varies under three brackets. The rates mentioned below are the latest ones, you can keep an eye on the changing rates. ₹ 5.45 per unit is charged if you consume upto 120 units of electricity. ₹ 6.70 per unit is charged for monthly usage of 121 to 240 units.If you consume more than 240 units, ₹ 7.70 will be charged per unit.