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The Yellowstone Valley Electric Cooperative offers rebates to residential and commercial members for purchasing energy efficient add-on heat pumps, geothermal heat pumps, water heaters, dishwashers, refrigerators, and washing machines. (Note: A State Tax Credit of $1,500 is also available for Ground Source Heat Pumps.) Rebate applications are located on the program web site. All installation and equipment requirements must be met. Please contact Yellowstone Valley Electric Cooperative or visit the program website for additional information.

Commercial and net metering alternative energy investments of $5,000 or more are eligible for a tax credit of up to 35% against individual or corporate tax on income generated by the investment. The investment must be depreciable. The credit is applied only against taxes due as a consequence of taxable or net income produced by:

Commercial and net metering alternative energy investments of $5,000 or more are eligible for a tax credit of up to 35% against individual or corporate tax on income generated by the investment. The investment must be depreciable. The credit is applied only against taxes due as a consequence of taxable or net income produced by:

Commercial and net metering alternative energy investments of $5,000 or more are eligible for a tax credit of up to 35% against individual or corporate tax on income generated by the investment. The investment must be depreciable. The credit is applied only against taxes due as a consequence of taxable or net income produced by:

The Alternative Energy Revolving Loan Program (AERLP) provides loans to individuals, small businesses, local government agencies, units of the university system, and nonprofit organizations to install alternative energy systems that generate energy for their own use. The program has historically been funded by air quality penalties collected by the Department of Environmental Quality (DEQ) and also used funding from The American Recovery and Reinvestment Act of 2009 (ARRA).

In May 2007, Montana enacted legislation (H.B. 3) that allows a property tax abatement for new renewable energy production facilities, new renewable energy manufacturing facilities, and renewable energy research and development equipment. Eligible facilities and equipment are assessed at 50% of their taxable value.

The Montana Electric Cooperatives' Association (MECA) adopted model interconnection guidelines in 2001 and a revised net-metering policy in September 2008. Net metering is available in whole or part by most of the 26 electric cooperatives in Montana. A map of the service areas of each of member cooperative is available on the MECA web site.

Montana-Dakota Utilities (MDU) offers a variety of rebates to commercial customers for the purchase and installation of energy efficient lighting measures, air conditioning equipment, variable speed drives and motors. Custom and prescriptive incentives are available for efficient lighting measures. Lighting equipment must meet technical standards specified on program web site and application form. Large customers, as defined by MCA 69-8103(17), will not be eligible for this program. Variable speed drive and motor rebates are based upon the horsepower (HP) of the equipment.

Montana-Dakota Utilities (MDU) offers several residential rebates on energy efficient equipment for natural gas and electric customers. Natural gas customers are eligible for rebates on furnaces and programmable thermostats if the equipment meets program efficiency standards. New furnaces must be replacing a working model with an AFUE of 80% or less and be rated at least 90% AFUE. Programmable thermostats must be Energy Star qualified and are limited to one rebate per address. Electric customers are eligible for a rebate of $175/ton on central air conditioning systems.

Montana's net-metering law, enacted in July 1999, applies to all customers of investor-owned utilities. Systems up to 50 kilowatts (kW) in capacity that generate electricity using solar, wind or hydropower are eligible. No limit on enrollment or statewide installed capacity is specified. Utilities may not require customer-generators to comply with any additional standards or requirements beyond those established by the National Electric Code, National Electrical Safety Code, Institute of Electrical and Electronic Engineers (IEEE), and Underwriters Laboratories (UL).