Residential Geothermal Systems Credit

November 01, 2022


A resident individual taxpayer of Montana who installs a geothermal heating or cooling system in his or her principal dwelling is eligible for a tax credit based on the installation costs of the system. The credit may not exceed $1,500, and only one credit may be claimed per household. If not used fully in the first year the system is installed, the credit may be carried forward for the 7 succeeding tax years. 

Use Montana Department of Revenue Form ENRG-A to claim this tax credit.

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:
  • Geothermal Heat Pumps
  • Geothermal Direct-Use
Incentive Amount: 100%
Maximum Incentive: $1,500
Carryover Provisions: Credit not used in the year in which the system is installed may be carried forward for the 7 succeeding tax years.


This program has 1 incentives
Technologies: Geothermal Heat Pumps, Geothermal Direct-Use
Sectors: Residential, Low Income Residential
Parameters: The incentive is 100.00 %, The incentive has a minimum of $1500.00


Name: MCA § 15-32-115
Date Enacted: 5/5/2001
Effective Date: 1/1/2002
Expiration Date: None


Name: Kathi Montgomery
Address: 1520 East Sixth Ave.
Helena MT 59620
Phone: (406) 444-6586
Name: Information Specialist - MT Dept. of Rev.
Organization: Montana Department of Revenue
Address: P.O. Box 8018
Helena MT 59604-5805
Phone: (406) 444-6900

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.