Residential Alternative Energy System Tax Credit

March 20, 2023


Repealed by S.B. 399.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.  

Program Overview

Implementing Sector: State
Category: Financial Incentive
State: Montana
Incentive Type: Personal Tax Credit
Web Site:
Administrator: Montana Department of Environmental Quality
Start Date: 1/1/2002
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
Incentive Amount: 100%
Maximum Incentive: $500 per individual taxpayer; up to $1,000 per household.
Equipment Requirements: Systems must be new and in compliance with all applicable performance and safety standards
Carryover Provisions: Excess credit may be carried forward four years


This program has 1 incentives
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
Sectors: Residential, Low Income Residential
Parameters: The incentive is 100.00 %, The incentive has a minimum of $1000.00


Name: MCA § 15-32-201
Date Enacted: 2001
Effective Date: 1/1/2002
Expiration Date: none
Name: S.B. 399 of 2021

This information is sourced from DSIRE; the most comprehensive source of information on incentives and policies that support renewables and energy efficiency in the United States. Established in 1995, DSIRE is operated by the N.C. Clean Energy Technology Center at N.C. State University.