Low end is $120, high end around $190. 1300 sq. ft. cape cod, 13 SEER HP, 5 people. It used to be higher before the new heat pump, clothes dryer and dishwasher. Just got a new fridge and washer and installed a programable thermostat also; hope they'll help bring it down a little more. I'm sure my water heater costs are tremendous and that's old. I've gotta read my incoming water temp this weekend while it's cold to see what size heater I would need if I go to an instantaneous one. I might not have enough power for it. Lights and 6 TV's stay on a lot.