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Montana Solar Incentives (2026)

Montana homeowners and small businesses can still lower the cost of going solar in 2026, but the biggest savings usually come from a few key places: the federal clean energy tax credit, Montana's renewable-energy property tax exemption, and your utility's net metering/billing rules. If you also need help with upfront costs, Montana's state energy loan program may be worth a look. This guide breaks down the Solar Incentives that are most relevant to a typical Solar Installation in Montana, plus what to prepare before you request quotes.

What Solar Incentives Are Available in Montana?

In 2026, the most common Montana Solar Incentives fall into four buckets:

You can reduce federal taxes with the Residential Clean Energy Credit (often called the "solar tax credit").

You may qualify for a Montana property tax exemption on part of the added value from a renewable energy system for a set period, if you apply correctly.

Your ongoing bill savings depend heavily on net metering (or a similar utility crediting method).

Some households and many small businesses/ag operations may use low-interest financing through the Montana DEQ Alternative Energy Revolving Loan Program (AERLP).

Solar incentives work best when the system size and financing match your utility rules and your tax situation.

Federal Solar Tax Credit in Montana: Residential Clean Energy Credit (2026)

For most homeowners, the federal Residential Clean Energy Credit is the single largest upfront Solar Incentive. In general, it allows you to claim 30% of qualified solar costs as a credit against federal income taxes for eligible installations. You claim it by filing IRS Form 5695 with your tax return for the year the system is placed in service (installed).

Qualified costs typically include solar panels (PV modules), inverters, mounting equipment, and installation labor, plus certain electrical components needed for the system to function. The IRS instructions and the credit page are the safest references for what qualifies.

If your tax liability isn't high enough to use the whole credit in one year, you may be able to carry forward the unused portion (details depend on the tax year and your return).

Montana Property Tax Exemption for Renewable Energy Systems

Montana offers a renewable-energy property tax exemption that can help prevent part of the solar-added value from increasing your property taxes for a limited time.

Under Montana law, a portion of the appraised value of eligible nonfossil energy generation is exempt from taxation for 10 years after installation. For a single-family residence, the statute lists $20,000 as the exempt portion, and for multifamily or nonresidential structures it lists $100,000.

To pursue this benefit, the Montana Department of Revenue provides Form AB-14 (Property Tax Exemption Application for Installation of an Alternative Energy System). The current AB-14 form notes that you submit it to your local DOR field office, and it includes a deadline for consideration for the current tax year.

Because property tax administration is local, it's smart to confirm how your county handles timing, appraisal, and documentation.

Montana Net Metering and Utility Bill Credits

Net metering is the Solar Incentive that affects your savings every month, because it determines how exported solar energy is credited on your bill.

NorthWestern Energy (NWE) net metering basics

NorthWestern Energy explains net metering as a billing arrangement where excess generation can offset future bills through credits. The utility also notes an annual "settle-up" concept where Montana law requires any remaining excess energy credit to reset to zero at the selected settle-up month.

That makes system sizing and load matching especially important: many Montana homes do best when the array is designed to cover a large share of annual usage without routinely overproducing.

For a broader view of how programs differ and why the details matter, you can start with incentive programs that can reduce your upfront cost and then circle back to your exact utility tariff.

Montana-Dakota Utilities (MDU) net metering basics

MDU publishes a net metering service tariff stating, among other items, that the net metering system must have an aggregate nameplate capacity per premise that does not exceed a stated threshold (commonly referenced at 50 kW) and must be fueled by eligible renewables.

Co-ops and municipal utilities

If you're served by a rural electric cooperative or a municipal utility, crediting methods and limits can differ from the large investor-owned utilities. Always verify the current policy on your utility's official website before you finalize a system size or expected payback.

Montana DEQ Financing: Alternative Energy Revolving Loan Program (AERLP)

If upfront cost is the main barrier, Montana's DEQ runs the Alternative Energy Revolving Loan Program (AERLP), which provides low-interest loans for alternative energy systems and certain conservation measures.

The DEQ also publishes program materials such as an AERLP brochure and documentation about how applications are reviewed (including ranking procedures when funds are limited).

AERLP isn't a rebate, but it can function like an incentive by lowering financing costs and helping you move forward with a Solar Installation sooner.

Are There Montana State Tax Credits for Solar in 2026?

Some older Montana tax credits have changed over time. For example, the Montana Department of Revenue notes that the Alternative Energy Production Credit was repealed and cannot be claimed after a specified tax year, though carryforward rules may apply for prior claims.

Because state tax programs can sunset or be replaced, it's best to treat "Montana solar tax credit" claims cautiously unless they're backed by current Montana DEQ, DOR, or statutory sources.

Does Montana Have a Solar Sales Tax Exemption?

Montana does not have a general-use sales tax, which can simplify solar purchasing compared with many other states.

(You may still see taxes/fees in specific situations—always review your contract and local requirements.)

How to Claim Montana Solar Incentives Step by Step

Most incentive paperwork becomes easier when you plan for it before the install date.

First, keep a clean file with your signed contract, final paid invoice, and a breakdown of equipment and labor for the federal credit.

Second, complete utility interconnection/net metering steps early (your installer often helps, but you should still understand the tariff and annual credit rules).

Third, if you plan to apply for the property tax exemption, download and complete AB-14 and track the submission deadline for your local DOR field office.

Finally, when you file taxes, use IRS Form 5695 for the Residential Clean Energy Credit and retain your supporting documentation in case you need it later.

Solar Installation in Montana: What to Expect

A typical Solar Installation has a few predictable phases: initial site assessment, system design, permitting, installation, inspection, and utility approval to operate. The timeline varies by weather, local permitting speed, and utility processing, but the key is that incentives often depend on when the system is officially installed/placed in service and when interconnection is approved.

Good installers design around your roof's best production areas and your utility credit rules so you're not overbuilding a system that earns fewer usable credits.

What Are Needed for Solar Installation?

If you're searching "what are needed for solar installation," here's what usually matters most in Montana—especially when you want incentives to go smoothly:

Your roof should have enough remaining life to avoid a near-term tear-off, and the structure needs to support the added load.

Your electrical panel needs adequate capacity; upgrades can be part of the project scope and may affect total costs you track for credits.

Permits and local approvals (and sometimes HOA rules) can dictate equipment placement and timing.

Utility interconnection requirements matter: net metering typically requires specific metering and documentation, and your crediting method depends on your utility's tariff.

For incentives paperwork, you'll want itemized invoices, proof of payment, equipment specs, and the utility permission-to-operate/interconnection confirmation when available.

Solar Companies: How to Compare Quotes Without Missing Incentives

When you compare Solar Companies, incentives should be part of the conversation—not an afterthought.

Ask each bidder how they size a system under your utility's net metering rules and annual credit reset.

Request an itemized proposal so you can clearly track qualified costs for the federal credit and keep documentation organized.

Confirm warranties (equipment and workmanship), estimated production, and monitoring.

If you're considering financing, ask whether AERLP is a fit and whether the installer has experience preparing the kind of project documentation lenders typically request.

Solar Incentives by State

Explore state-specific solar incentives, net metering rules, tax credits, and rebates to maximize your savings on solar installation.

FAQ: Montana Solar Incentives (2026)

Ready to Move Forward?

If you want the best outcome from Montana Solar Incentives, the winning move is usually the same: get a few system designs that reflect your utility's credit rules, then compare net cost after incentives.

Sources

Montana Solar Incentives 2026: Tax Credit & Net Metering