Idaho Power*  

Residential
$4.00 per month
5.6 - 8.9 cents per kWh depending on winter/summer and usage

Business
For those using 2,000 kWh per mo or less:
$4.00 per month
7.0 - 8.4 cents per kWh depending on winter/summer and usage  

For those using more than 2,000 kWh per mo:
$12.50 per month
2.9 - 7.8 cents per kWh depending on winter/summer and usage  

Industrial
Primary Service - 1,000 kW
$210 per month
2.5 - 3.6 cents per kW
Additional charges may apply  

* Above rates based on costs as of June 2009. Costs are based on one year adjusted rate. Rates are adjusted each May for purchase power cost adjustment.

http://www.idahopower.com/

Over half of Idaho's electricity is produced with low-cost hydropower facilities. As part of the Bonneville Power Administration's northwest power distribution grid, industrial electric rates are lower than most major cities in the nation and about half that of many western cities.

Compare Annual Electricity Costs in Western States (Cents per kilowatt hour)
Idaho	5.99¢
Arizona	8.46¢
California	12.62¢
Colorado	7.57¢
Nevada	9.79¢
Oregon	7.56¢
Utah	6.23¢
Washington	6.98¢
Energy Information Administration, May 2009