The Ultimate Guide to Geothermal Tax Credits and Rebates

How to Find Every Geothermal Tax Credit and Rebate Available in 2026

The geothermal tax credits and rebates available to homeowners and businesses have changed significantly heading into 2026. Here is a quick summary of what you can access right now:

• Federal §25D Residential Clean Energy Credit: Terminated for systems placed in service after December 31, 2025, under the One Big Beautiful Bill Act (P.L. 119-21). If you installed before that date, you can still carry forward unused credits using IRS Form 5695.
• Federal §48 Investment Tax Credit (Commercial): Still active. Base rate of 6%, scalable up to 30% with prevailing wage, domestic content, or energy community bonuses. Applies through 2032.
• New York State Credit: 25% of qualified expenditures, up to $10,000 for systems placed in service on or after July 1, 2025. Claimed on Form IT-267.
• Colorado State Credit (C.R.S. 39-22-552): Up to 30% of qualified expenditures for approved geothermal energy projects, with potential increases to 50% for high-impact projects. Refundable if it exceeds tax liability.
• Utility Rebates: Vary by provider and region. Can be stacked with state credits in most cases.

Geothermal heating and cooling is one of the most efficient HVAC technologies available — using the earth's stable ground temperature to heat and cool your home year-round. But it comes with a meaningful upfront investment, which is why understanding every incentive available matters so much.

For homeowners and small business owners across the Crystal Coast and coastal North Carolina, navigating these programs can feel overwhelming. Federal rules changed dramatically on July 4, 2025, when the One Big Beautiful Bill Act reshaped which credits survive and which expired. State programs like New York's expanded $10,000 credit and Colorado's project-based incentives filled some of that gap — but each has its own eligibility rules, application process, and deadlines.

This guide breaks it all down clearly, so you know exactly what you qualify for, what paperwork you need, and how to stack every available incentive to maximize your savings.

Geothermal tax credits and rebates available vocabulary:

• geothermal system pros and cons for coastal homes
• is a geothermal system worth the investment

Understanding the Geothermal Tax Credits and Rebates Available in 2026

As we navigate the middle of 2026, the legislative landscape surrounding renewable energy has undergone major shifts. The most important update for residential property owners is the transition following the One Big Beautiful Bill Act (OBBBA), signed into law on July 4, 2025. This act brought a sudden end to the federal Section 25D Residential Clean Energy Credit for any residential geothermal installations completed after December 31, 2025.

However, this does not mean residential geothermal incentives have completely vanished. If you had a qualifying ground-source heat pump installed and placed in service on or before December 31, 2025, you are still fully eligible to claim the 30% federal tax credit on your tax returns filed in 2026. Furthermore, if your calculated credit from a 2025 installation exceeds your total federal tax liability for that year, federal carryforward rules allow you to roll the unused portion over to 2026 and subsequent tax years to offset future taxes.

For commercial and light commercial properties, the rules under Section 48 of the Internal Revenue Code remain active and highly lucrative. If you own a business, a multi-family rental property, or are exploring third-party commercial leasing options, you can still tap into robust federal credits. To determine if this technology fits your building's long-term budget, it is helpful to look closely at whether Is a Geothermal System Worth the Investment for your specific property type.

Federal Residential Clean Energy Credit (Section 25D) vs. Commercial Investment Tax Credit (Section 48)

Understanding the difference between Section 25D and Section 48 is critical for maximizing the geothermal tax credits and rebates available in 2026:

• Section 25D (Residential Clean Energy Credit): This credit historically applied to homeowners installing geothermal heat pumps in their primary or secondary residences. It was a non-refundable credit equal to 30% of the total qualified installation costs. Following the passage of OBBBA, Section 25D is no longer available for new residential systems placed in service after December 31, 2025. However, the carryforward provision remains fully active for those who installed systems prior to the cutoff.
• Section 48 (Investment Tax Credit - ITC): This is the federal tax credit for commercial energy property. Unlike the residential credit, Section 48 was not terminated on the same schedule by the OBBBA. Commercial-use geothermal installations, including those in commercial buildings, agricultural facilities, and certain multi-family rental properties, remain eligible for a base tax credit of 6% through 2032. This base rate can scale up to an enhanced rate of 30% if the project meets specific prevailing wage and apprenticeship requirements, or if the system is under 1 megawatt (MW) in capacity.

Additionally, commercial projects can qualify for extra 10% bonus credits by meeting domestic content standards or by being located in designated energy communities or low-income areas. This makes commercial geothermal installations incredibly attractive for local businesses looking to improve their energy efficiency. To learn more about how these systems operate, check out our guide on Geothermal Heating and Cooling Benefits for Homeowners.

How the One Big Beautiful Bill Act (OBBBA) Impacted Geothermal Tax Credits and Rebates Available

The One Big Beautiful Bill Act (P.L. 119-21), enacted on July 4, 2025, significantly altered the timeline of the clean energy incentives originally established under the Inflation Reduction Act (IRA). While the IRA had originally extended the 30% residential tax credit through 2032, the OBBBA terminated Section 25D specifically for residential geothermal heat pumps placed in service after December 31, 2025.

This sudden sunset means that any homeowner looking to install a new residential geothermal system in 2026 cannot claim the 30% federal tax credit unless they are utilizing a commercial third-party leasing model that qualifies under Section 48. For those who completed their installations in 2025, the primary focus is now on utilizing IRS Form 5695 to properly claim the credit and carry forward any unused tax credits to offset their 2026 tax liabilities. For a detailed breakdown of how regional policy shifts impact local energy upgrades, read about the Inflation Reduction Act Benefits for NC Homeowners.

Eligibility Requirements and Qualifying Expenses for Geothermal Systems

To successfully claim any remaining federal carryover credits or state-level incentives, the geothermal system and the property must meet strict eligibility requirements.

For residential systems installed in 2025 (and claimed/carried forward in 2026), the equipment must have been installed in connection with a dwelling unit located in the United States that is used as a residence by the taxpayer. Both existing homes and new construction qualify, and the credit applies to both primary residences and second homes. However, rental properties do not qualify for the residential Section 25D credit; landlords must instead look to the Section 48 commercial credit.

From an equipment standpoint, the geothermal heat pump must be ENERGY STAR certified at the time of purchase. It must use the ground or groundwater as a thermal energy source (or sink) to heat or cool the home. For coastal properties, selecting the right system requires careful planning. We detail these unique considerations in our article on Geothermal System Pros and Cons for Coastal Homes.

What Costs Qualify Under the Geothermal Tax Credits and Rebates Available?

When calculating your tax credit or preparing documentation for state and utility rebates, it is important to know which expenditures qualify. Qualified geothermal energy system equipment expenditures generally include:

• Pumps and Heat Exchangers: The core indoor geothermal cabinet and circulating pumps.
• Ground Loop Materials: All piping, manifolds, and fluids installed in the ground or submerged in a qualifying body of water.
• Labor Costs: The physical assembly, installation, and excavation work required for the ground loops.
• System Components: Functional parts such as inverters, converters, and built-in distribution equipment.
• Electrical Upgrades: Any wiring or electrical panel upgrades necessary solely to support the geothermal system.

Conversely, certain expenses are strictly excluded. You cannot claim the credit for ductwork modifications throughout the rest of the home (unless directly integrated as an essential component of the geothermal system's immediate distribution), emergency backup heating systems (like standard electric resistance strip heaters), or general home remodeling costs associated with the installation. To ensure your system is designed and installed in compliance with these guidelines, work with a professional team experienced in Geothermal Installation.

State-Level Geothermal Incentives: New York and Colorado

While federal residential credits have stepped back, several states have stepped up to offer substantial state-level geothermal tax credits and rebates. Two of the most prominent state programs in 2026 are found in New York and Colorado.

The table below outlines the key differences between these two state programs:

In New York, the state income tax credit was doubled from $5,000 to $10,000 for systems placed in service after July 1, 2025. It applies to primary residences that are not rented out during the claim year, and any excess credit can be carried forward for up to five years if the taxpayer does not qualify for the refundable option.

In Colorado, the tax credit program (C.R.S. 39-22-552) focuses heavily on commercial, industrial, and utility-scale geothermal projects, including exploration, drilling, and thermal energy distribution. Administered by the Colorado Energy Office, projects must undergo a semi-annual merit-based review. If approved, the credit is fully refundable to the taxpayer, meaning that if the credit exceeds the state taxes owed, the state issues a refund check for the difference.

How to Stack Federal, State, and Utility Incentives

One of the best ways to maximize your financial return on a geothermal installation is by "stacking" different incentives. Stacking allows you to combine federal tax credits (or carryforwards) with state-level tax credits, local utility rebates, and low-interest financing programs.

However, you must follow specific IRS and state rules when combining these incentives:

1. Subtract Manufacturer Rebates: Any rebate offered directly by the geothermal manufacturer, distributor, or installer must be subtracted from your total installation cost before you calculate your federal tax credit.
2. Utility Rebates and Subsidies: If your electric utility (such as Duke Energy in North Carolina) provides a cash rebate for installing an energy-efficient heat pump, the IRS may classify this as a purchase-price adjustment. In these cases, you must subtract the utility rebate from your qualified expenses before calculating your federal tax credit.
3. State Tax Credits: State tax credits (like New York's 25% credit) generally do not reduce your federal tax basis. This means you can calculate your federal credit on the full qualifying cost, and then claim the state credit separately on your state return.

By combining a utility rebate, a state tax credit, and a federal tax credit carryforward, homeowners in active incentive states can often offset a massive portion of their initial investment. To explore the regional rebate landscape closer to home, check out our guide on North Carolina Energy Rebates for HVAC Upgrades.

Frequently Asked Questions About Geothermal Incentives

Can I carry forward unused federal geothermal tax credits to 2026?

Yes. If you installed a residential geothermal system in 2025 and your calculated 30% Section 25D credit was larger than the total federal income tax you owed for that year, you do not lose the remaining balance. You can carry the unused portion forward to 2026 and future tax years using IRS Form 5695. This allows you to continue reducing your federal tax liability until the credit is fully exhausted.

Are there income limits for claiming geothermal tax credits?

There are no income limits or phase-outs for the federal Section 25D or Section 48 geothermal tax credits. Whether your household income is high or low, you are eligible for the same percentage-based credit. However, some state-level programs and utility rebates do feature income-qualified tiers. For example, programs like Mass Save in Massachusetts offer standard rebates up to $13,500, but increase that incentive up to $25,000 for income-qualified households.

What documentation do I need to claim my geothermal tax credit?

To successfully claim your tax credits and rebates, you must maintain meticulous records. Keep digital and physical copies of the following documents for at least seven years:

• Itemized Contractor Invoices: Showing the separate costs for equipment, labor, excavation, and electrical work.
• Manufacturer Certification Statement: A signed document from the manufacturer certifying that the specific model installed is ENERGY STAR qualified.
• Local Permits: Copies of electrical, mechanical, and ground-loop plumbing permits required by your municipality.
• Utility Rebate Approvals: Official letters or statements confirming any rebates received.

Having these documents organized makes tax filing simple and protects you in the event of an audit. If you need assistance gathering your equipment documentation or require professional maintenance to keep your system compliant, reach out to our team for professional Geothermal Service.

Conclusion

Navigating the geothermal tax credits and rebates available in 2026 requires careful planning, but the financial returns remain incredibly strong for those who know how to leverage the system. While the residential federal Section 25D credit has transitioned into a carryforward-only phase for prior installations, commercial properties can still take full advantage of the robust Section 48 Investment Tax Credit. Meanwhile, state-level programs and local utility rebates continue to offer excellent pathways to offset your installation costs.

At Airtech Mechanical Services, Inc., we have spent over 20 years helping homeowners and business owners across New Bern, Morehead City, Hampstead, and the surrounding Crystal Coast communities achieve dependable, energy-efficient indoor comfort. Whether you need a detailed system evaluation, specialized coastal HVAC solutions, or professional Geothermal Repair, our certified technicians are here to deliver honest, reliable service with integrity.

Are you ready to explore how geothermal technology can lower your utility bills and transform your home comfort? Visit our Geothermal Services Page to schedule a consultation today. Don't forget to ask about joining the Airtech Advantage Club to keep your heating and cooling systems running at peak performance all year long!