The 2026 Geothermal Tax Credit: Is the 30% Federal Credit Still Available?

If you're shopping for a geothermal heat pump in 2026, you've probably heard about the 30% federal tax credit. It's been one of the strongest selling points for geothermal — a dollar-for-dollar credit that can knock $7,500 or more off your tax bill.

But there's a problem. The IRS appears to be saying two different things about whether that credit still exists.

What's Going On

Here's the short version: the Inflation Reduction Act, signed into law in August 2022, extended the residential geothermal tax credit at 30% through 2032. The industry celebrated. Installers started marketing it. Homeowners planned around it.

Then, sometime in late 2025 or early 2026, the IRS updated its web page for the Residential Clean Energy Credit with this language:

"The Residential Clean Energy Credit equals 30% of the costs of new, qualified clean energy property for your home installed anytime from 2022 through December 31, 2025. The credit is not available for any property placed in service after December 31, 2025."

— IRS.gov, Residential Clean Energy Credit page (accessed March 2026)

But on that same page, further down, it also says:

"You can claim the annual credit every year that you install eligible property until the credit begins to phase out in 2033."

— Same IRS page, further down

Those two statements directly contradict each other. Either the credit ended December 31, 2025, or it continues until 2033. It can't be both.

What the Law Actually Says

The Inflation Reduction Act (H.R. 5376) amended Section 25D of the Internal Revenue Code. The International Ground Source Heat Pump Association (IGSHPA), the industry's primary trade organization, summarizes the credit schedule from the law itself:

• 30% credit for systems installed 2022–2032
• 26% for systems installed in 2033
• 22% for systems installed in 2034
• 0% starting in 2035

This covers all Section 25D technologies: geothermal heat pumps, solar panels, solar thermal, fuel cells, small wind, and battery storage.

The actual legislative text is publicly available on Congress.gov. As of our review, no subsequent legislation has amended or repealed these provisions.

What the IRS Website Says

As of March 2026, the IRS's Residential Clean Energy Credit page contains the contradictory language quoted above. The first paragraph clearly states the credit is "not available for any property placed in service after December 31, 2025," while a later section references phase-out beginning in 2033.

This could be:

• A website editing error that hasn't been caught
• Language reflecting a regulatory interpretation we're not yet aware of
• A reflection of legislative changes made in late 2025 that haven't been widely publicized
• A temporary discrepancy while pages are being updated

We've been unable to identify any legislation passed after the IRA that would have shortened the credit timeline. But the IRS website is the operational guidance taxpayers and tax preparers rely on, so this discrepancy matters.

What Form 5695 Says

The 2025 Instructions for Form 5695, published by the IRS in January 2026, include language indicating that residential clean energy credits cannot be claimed for expenditures made after December 31, 2025.

Form 5695 is the actual form used to claim the credit. Its instructions carry significant weight — this is what tax preparers use when filing returns. If the form says the credit isn't available after 2025, that's what gets applied in practice, regardless of what the original law says.

Possible Explanations

We've considered several scenarios. None are confirmed — this is our analysis based on available information:

Scenario 1: IRS Website Error

This is the simplest explanation. Government websites are maintained by humans, and errors happen. The "not available after December 31, 2025" language could be incorrectly applied to geothermal and other 25D technologies when it was meant only for a different provision. The reference to 2033 phaseout on the same page suggests the content may have been partially updated.

Scenario 2: Legislative Change We Haven't Identified

It's possible that legislation passed in late 2025 (potentially in a year-end budget package or reconciliation bill) modified the Section 25D timeline. Congressional tax law changes sometimes take weeks or months to be fully publicized and understood. If this happened, the IRS would be correct, and the industry hasn't fully caught up.

Scenario 3: Regulatory Reinterpretation

The IRS sometimes issues regulatory guidance that narrows or modifies how a law is applied. While less likely for something this significant, it's not impossible that Treasury or IRS guidance has interpreted the credit differently than the plain reading of the statute.

Our Assessment

Based on available evidence, Scenario 1 (website error) seems most likely. The fact that the same IRS page contradicts itself, combined with no identifiable legislation changing the IRA provisions, suggests an error rather than a deliberate policy change. However, the Form 5695 instructions aligning with the "ends after 2025" language gives us pause.

We are not making a definitive call. This needs professional tax guidance.

What You Should Do Right Now

If you're planning a geothermal installation in 2026:

1. Talk to a tax professional. Not your friend who does taxes on the side — a CPA or tax attorney who tracks energy tax provisions. They can review the latest IRS guidance and give you a definitive answer for your situation.
2. Don't cancel your project based solely on this. Even without the federal credit, geothermal may still make financial sense depending on your energy costs, state incentives, and long-term plans. See our cost comparison for the numbers with and without the credit.
3. Check your state incentives. Many states offer their own geothermal rebates, tax credits, or property tax exemptions that are independent of the federal credit.
4. Ask your installer. Reputable geothermal installers are tracking this closely. They should be able to tell you how they're advising customers.
5. Watch this space. We'll update this article as soon as there's clarity. Consider bookmarking it.

Commercial Installations: Section 48

If you're a commercial property owner or developer, there's a separate investment tax credit under Section 48 of the tax code that may still apply to geothermal installations. According to IGSHPA's reading of the IRA:

• 30% bonus rate / 6% base rate for commercial geothermal installations (2023–2032)
• 26% bonus / 5.2% base in 2033
• 22% bonus / 4.4% base in 2034

The bonus rate requires either meeting prevailing wage and apprenticeship requirements or being a project under 1 MW of thermal energy capacity. Certain tax-exempt entities (municipalities, tribal governments, rural cooperatives) can receive direct payment from the Treasury in lieu of a credit.

We have not identified similar conflicting guidance for the Section 48 commercial credit, but recommend the same caution: consult a tax professional before relying on any tax credit for financial planning.

State Incentives Still Available

Regardless of what happens with the federal credit, many states have their own geothermal incentives that are independently authorized:

• State tax credits — Several states offer their own income tax credits for geothermal installations
• Utility rebates — Electric utilities in many states offer rebates for geothermal heat pump installations
• Property tax exemptions — Some states exempt the added home value from geothermal systems from property tax
• Sales tax exemptions — Some states exempt geothermal equipment from sales tax
• Low-interest financing — State energy offices sometimes offer favorable loan terms for geothermal projects

We're building comprehensive state-by-state guides that will cover all available incentives. Check back as we add your state.

The Bottom Line

Something is off with the IRS guidance on the geothermal tax credit, and homeowners deserve clear answers. The law as written extends the 30% credit through 2032. The IRS website and Form 5695 appear to say it ended in 2025. We can't explain the discrepancy with the information currently available.

If you're in the market for a geothermal system, don't make a $25,000-$40,000 decision based on a potentially incorrect IRS web page — or on an assumption that the credit still exists without verifying it. Get professional tax guidance specific to your situation and timeline.

We'll keep digging and update this article as the picture becomes clearer. If you're a tax professional, CPA, or industry insider with information about this situation, we'd love to hear from you.