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Last Updated October 24, 2021

Program Overview


Financial Incentive



Incentive Type:

Personal Tax Credit


Montana Department of Environmental Quality

Start Date:


Expiration Date:


Web Site:


Applicable Sectors:

Residential, Low Income Residential

Eligible Renewable/Other Technologies:

Solar - Passive, Solar Water Heat, Solar Space Heat, Geothermal Electric, Solar Photovoltaics, Wind (All), Biomass, Geothermal Heat Pumps, Wind (Small), Hydroelectric (Small), Geothermal Direct-Use, Fuel Cells using Renewable Fuels


Repealed by S.B. 399. Credit is unavailable for installations in beginning in 2022.

Residential taxpayers who install an energy system using a recognized non-fossil form of energy on their home after December 31, 2001 are eligible for a tax credit equal to the amount of the cost of the system and installation of the system, not to exceed $500. This cap is for individual taxpayers, so married taxpayers filing jointly can get a tax credit of up to $1,000 per household. The tax credit may be carried over for the following four taxable years.

Recognized non-fossil forms of energy generation include systems that generate energy from solar, wind, solid waste, geothermal, fuel cells, biomass, wood waste, or small hydropower systems.