Montana Solar Panel Permits & Incentives Guide

Installing solar panels in Montana involves local permitting, state tax incentives, state loan programs, and federal tax credits. To maximize your returns, you need to engage with all four.

Key actions:

• Get permits from your city or county building department, not a state agency.
• Apply for Montana's property tax exemption within the first year after installation. Use Form AB-14 from the Montana Department of Revenue.
• Check your eligibility for the Alternative Energy Revolving Loan Program (AERLP) through the Montana Department of Environmental Quality (DEQ).
• Claim the 30% federal Residential Clean Energy Credit (IRS §25D) on your federal tax return for the year you place the system in service.

Montana's median home listing price is $624,900 (FRED, MEDLISPRIMT, March 2026). Solar adds value to your home. The property tax exemption shields this added value from taxation for ten years.

Navigating Solar Panel Permit Requirements in Montana

Montana does not issue state-level solar permits. Permits come from the city or county where your property is located. The Montana Building Codes Bureau, part of the Department of Labor and Industry, adopts model building codes. However, local jurisdictions manage the permit application, fees, inspection, and approval processes.

What Permits You Typically Need

Most residential solar installations in Montana require at least two permits:

| Permit Type | Who Issues It | What It Covers |

Available Rebates & Incentives

• Renewable Energy Systems Exemption: Property tax exemption for non-fossil energy generation for 10 years after installation, up to $20,000 for residential and $100,000 for non-residential.
• Corporate Property Tax Reduction for New/Expanded Generating Facilities: Reduces local mill levy for new generating plants using renewable sources during the first nine years of operation, subject to local approval.
• Generation Facility Corporate Tax Exemptions: New electricity generating facilities under one megawatt using renewable sources are exempt from property taxes for five years after operation begins.
• Yellowstone Valley Electric Cooperative - Solar Stock Watering System Rebate: Offers 50% rebate on solar panel installations for stock watering, up to $2,000. Must be a member in good standing with YVEC.
• Alternative Energy Revolving Loan Program: Provides loans for individuals and organizations to install alternative energy systems for personal use or conservation.

Federal Tax Deductions

The IRS offers a 30% uncapped federal tax credit under §25D for residential solar PV, solar water heating, battery storage (≥3 kWh), geothermal, and small wind systems, available through 2032. This credit is stackable with state and utility rebates. Consult a tax professional for personalized advice and to ensure compliance with current tax regulations.

Frequently Asked Questions

Why doesn't Montana regulate solar panel permits at the state level?

Montana allows local jurisdictions to manage solar panel permits to better address specific community needs and conditions, leading to a more tailored approach.

What law applies to solar panel installations in Montana?

While there are no state-level regulations, local building codes and zoning laws govern solar panel installations, and federal tax incentives apply.

Are there any active legislative proposals regarding solar energy in Montana?

As of now, there are no widely publicized legislative proposals specifically aimed at changing solar energy regulations in Montana.

What do residents do given the absence of state-level solar regulations?

Residents must contact their local city or county building department to understand the specific permitting requirements and processes for solar installations.

How does Montana's approach to solar permits compare to neighboring states?

Montana's decentralized approach contrasts with some neighboring states that have more comprehensive state-level regulations governing solar installations.