Idaho Solar Incentives (2026): Tax Deductions, Credits & Utility Export Rules
Idaho offers a combination of state and federal incentives for solar. In 2026, the key opportunities come from the Residential Alternative Energy Device Deduction (state income tax deduction), OEMR State Energy Loan Program, and utility-specific export credit rules. Below is a clear guide to what's available and how to maximize your solar investment in Idaho.
Idaho's Three-Bucket Solar Incentive System
Idaho incentives fall into three main categories: (1) a state income tax deduction for residential systems, (2) the OEMR State Energy Loan Program for financing, and (3) utility-specific net metering or export credit rules. Understanding all three helps you build a complete financial picture.
1. Residential Alternative Energy Device Deduction (State Income Tax)
Idaho allows a deduction on state income taxes for qualifying residential solar installations. The deduction is taken in the year the system is placed in service and is subject to limits and eligibility rules.
Important: Check with the Idaho State Tax Commission for current deduction limits and what qualifies as a "residential alternative energy device" under the most recent guidance.
2. Federal Residential Clean Energy Credit (2026 Status)
As of early 2026, the IRS indicates the Residential Clean Energy Credit is not available for systems placed in service after December 31, 2025. If you installed qualifying solar by the end of 2025, you may still be able to claim it or carry forward unused amounts.
Tax guidance: Consult a tax professional about your specific situation and any available carryforward mechanisms if you're near the 2025/2026 boundary.
3. OEMR State Energy Loan Program
Idaho's Office of Energy Resources (OEMR) administers energy financing programs. While not a direct rebate or tax credit, favorable financing terms can significantly improve your effective payback.
What it covers
- Solar photovoltaic systems for residential properties
- Favorable interest rates and extended repayment terms (when available)
- Program availability and terms can change annually
Next step: Contact OEMR or your installer to confirm current program status, eligibility requirements, and application timelines.
Utility-Specific Export and Net Metering Rules
Idaho has multiple utilities with different approaches to solar export credits and net metering. Your savings depend heavily on which utility serves your address.
Idaho Power
Idaho Power's Schedule 77 (Net Metering Service) governs residential solar export. Customers are credited at the retail rate for net metering during the billing period.
- Billing: Net consumption charged at residential rate; net export credited at retail rate
- System size limit: Typically limited to customer's historical peak demand or a percentage of annual usage
- Carryover: Monthly balances may or may not roll forward depending on contract terms
Rocky Mountain Power
Rocky Mountain Power's net metering tariff covers customers in Oregon, Utah, and Idaho. In Idaho service territory, Schedule 6 governs residential solar export and net metering treatment.
Avista
Avista's tariff in Idaho includes net metering provisions for residential solar. Contact your local Avista office or review their public tariff documents for current export credit details.
Key point: Utility territory determines your export credit value more than any state-level incentive. Your installer should model savings using your specific utility's tariff.
Sales Tax Exemption & Property Tax Treatment
Sales tax exemption
Idaho does not offer a broad statewide sales tax exemption for residential solar equipment. However, some counties or local jurisdictions may have local exemptions or abatements. Ask your installer and local tax assessor.
Property tax
Idaho law provides that solar systems installed on residential property are not subject to increased property tax as a result of the solar installation (ISC § 63-602LL). This is a significant benefit for home equity and long-term ownership.
Solar Installation and Permitting in Idaho
Interconnection basics
Before your system operates, you must complete interconnection with your utility. Idaho utilities have specific requirements for equipment, installation standards, and permission-to-operate timelines.
What to expect in every quote
- Line-item breakdown (equipment, labor, permitting, interconnection, financing setup if applicable)
- Production estimates with clear assumptions (roof tilt, azimuth, shading, weather data)
- Export credit assumptions based on your utility's tariff (not statewide averages)
- Equipment warranties, workmanship warranty, and service terms
- Estimated timeline from contract to permission-to-operate
Comparing Solar Companies in Idaho
When evaluating Solar Companies, ask them to show their work on utility-specific export credit calculations and state tax deduction eligibility. A good installer will:
- Confirm your utility territory and pull the current tariff to model savings
- Explain how they calculated system size and expected production
- Show the state tax deduction benefit (if applicable) and how it appears on your return
- Provide references to the OEMR program if financing is an option for your address
- Clarify who handles permitting, interconnection, and any rebate applications
Compare Bids Using the Same Assumptions
Idaho incentives require careful modeling of utility-specific rules and state tax treatment. Getting multiple quotes with consistent assumptions is your best defense against overpaying.
Solar Incentives by State
Explore state-specific solar incentives, net metering rules, tax credits, and rebates to maximize your savings on solar installation.
Midwest
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FAQ: Idaho Solar Incentives (2026)
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