Geothermal Tax Credit

Homeowners with geothermal heat pumps can cut their energy bills by up to 65% compared to traditional HVAC systems. And now, a federal incentive makes that initial investment far more accessible. This isn't a small rebate. It’s a direct, dollar-for-dollar reduction of your federal tax liability, fundamentally changing the financial equation for adopting this clean energy technology. The window to claim the full amount is open right now, but it won't last forever.

What is the Geothermal Tax Credit and What Percentage Can You Claim?

The Residential Clean Energy Credit is a federal tax incentive providing a 30% credit for the total cost of new, qualifying geothermal heat pump systems. This uncapped credit applies to equipment placed in service between 2022 and 2032, directly reducing a homeowner's federal tax liability.

The geothermal tax credit is officially known as the Residential Clean Energy Credit under section 25D (now expired, replaced by the Residential Clean Energy Credit) of the U.S. tax code. So, the Inflation Reduction Act of 2022 expanded and extended this incentive, setting the credit at 30% of the total project cost for systems installed from 2022 through 2032. This isn't a deduction. It's a nonrefundable tax credit, which means it can lower your tax bill to zero, but you won't get any of it back as a refund beyond your tax liability. For a typical system costing $25,000, this translates to a $7,500 credit. The credit percentage is scheduled to decrease to 26% for systems installed in 2033 and 22% in 2034 before expiring. Find all available incentives using our rebate calculator.

So what? Why does this matter? A geothermal heat pump system is a significant upfront investment, with average installation costs ranging from $15,000 to $35,000. But without a financial incentive like the 30% tax credit (currently available through December 2032 under the Inflation Reduction Act), this high-efficiency technology remains out of reach for millions of American households. This credit directly addresses that barrier, reducing the net cost by thousands of dollars and shortening the payback period from over 10 years to as few as 5-7 years in many cases.

What Geothermal Equipment Qualifies and Are There Income Limits?

Geothermal heat pump property that meets ENERGY STAR program requirements at the time of installation is eligible for the Residential Clean Energy Credit. This federal incentive has no income limits, making it available to all homeowners regardless of their adjusted gross income (AGI).

To qualify for the 30% credit, the entire geothermal system must meet the specific criteria set by the ENERGY STAR program. The total cost used to calculate the credit includes more than just the heat pump unit itself. It covers the costs of the heat pump, ground loop or heat exchanger, associated piping, wiring, and all labor for onsite preparation, assembly, and original installation. According to the U.S. Department of Energy, this comprehensive coverage ensures the full scope of the project contributes to the credit amount. Crucially, there are no income caps on this specific credit, distinguishing it from many other energy tax credits that have income-based phaseouts. This makes it a universally accessible incentive for homeowners looking to invest in geothermal technology.

Are There Any Annual or Equipment Spending Caps on the Credit?

The Residential Clean Energy Credit for geothermal installations has no annual or overall dollar caps on the total project cost. The 30% credit is calculated on the full, undiluted cost of the system and its installation, without any upper spending limit through 2032.

This is a key feature that separates the geothermal tax credit from other home energy incentives. For example, the Energy Efficient Home Improvement Credit has strict annual limits, often capped at $1,200 or $2,000 per year. But the Residential Clean Energy Credit imposes no such restrictions. If a homeowner installs a high-end geothermal system costing $40,000, they can claim the full 30%, which amounts to a $12,000 tax credit for that year. This uncapped structure provides a powerful incentive for homeowners to invest in the most efficient and appropriately sized system for their property without worrying about hitting a financial ceiling. The IRS confirms this structure directly on its credit guidance pages.

All of these qualified expenses have no credit limits except for fuel cell property.

--- IRS.gov, Residential Clean Energy Credit

How Do You Claim the Geothermal Tax Credit and What Are the Key Dates?

Homeowners claim the geothermal tax credit by completing and attaching IRS Form 5695, Residential Energy Credits, to their annual federal tax return (Form 1040). The 30% credit rate is effective for all qualifying systems placed in service from January 1, 2022, through December 31, 2032.

The process for claiming the credit is straightforward. First, you must purchase and install a qualifying geothermal system. Be sure to keep all receipts and documentation, including proof that the system is ENERGY STAR certified. At tax time, you'll use these records to fill out Part I of IRS Form 5695. The total calculated credit from this form then transfers directly to your Form 1040, reducing your total tax liability. The "placed in service" date is critical; it's the date the installation is complete and the system is ready for use. For the full 30% credit, this date must fall between January 1, 2022, and December 31, 2032. (See also: best geothermal heat pump brands.)

Can You Stack the Geothermal Tax Credit with Other Energy Incentives? (See also: geothermal tax credit vs solar tax credit.)

The federal geothermal tax credit can be combined with state tax credits and local utility rebates to maximize savings. However, a utility rebate for the equipment itself typically reduces the cost basis used to calculate the 30% federal credit (currently available through December 2032 under the Inflation Reduction Act), while state credits do not.

Stacking incentives is a powerful strategy, but the rules matter. State tax credits are generally considered a separate benefit and don't reduce the amount you can claim on your federal return. But rebates from a utility company are often viewed by the IRS as a discount or reduction in price. For example, a $30,000 geothermal project that receives a $2,000 rebate from the local utility has a new cost basis of $28,000. The 30% federal credit (currently available through December 2032 under the Inflation Reduction Act) would then be calculated on this lower amount, resulting in an $8,400 credit ($28,000 x 0.30). So, while you can combine them, the federal portion is calculated after the utility rebate is subtracted. Check for available heat pump rebates in your area to see how they interact.

Federal vs. State Energy Incentive Comparison

Incentive Name	Credit/Rebate Amount	Annual Cap	Expiration
Residential Clean Energy Credit (Federal)	30% of total cost	None	Phases out 2033-2034
Energy Efficient Home Improvement Credit (Federal)	30% of cost, up to $2,000 for heat pumps	$3,200 total annually	2032
NYS Clean Heat Rebate (State Example)	Varies by utility, up to $15,000	Per project	Varies by utility

Related Reading: Learn more about Geothermal Carryforward Tax Credit Rules and Geothermal Tax Credit For New Construction.

Frequently Asked Questions

What are the eligibility requirements for the federal geothermal tax credit? (See also: geothermal heat pump cost with rebates.)

To be eligible, the geothermal heat pump must be ENERGY STAR certified and installed at your primary or secondary residence in the United States. The credit is available for both existing homes and new construction.

How much is the federal tax credit for installing a geothermal heat pump?

The tax credit is 30% of the total project cost, including the equipment, labor, and all related components. There is no dollar limit on the credit amount for systems installed between 2022 and 2032.

How do I claim the geothermal energy tax credit on my federal tax return?

You claim the credit by filing IRS Form 5695, Residential Energy Credits, along with your standard Form 1040 federal tax return. You must have receipts proving the cost and ENERGY STAR certification of the equipment.

When does the federal geothermal tax credit expire?

The 30% credit rate is available through December 31, 2032. It then steps down to 26% for systems installed in 2033 and 22% in 2034. The credit is set to expire completely after December 31, 2034.

Does the geothermal tax credit apply to both new construction and existing homes?

Yes, the Residential Clean Energy Credit applies to qualifying geothermal systems installed in both new construction projects and existing homes that serve as a primary or secondary residence.

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Official Sources

Updated: April 14, 2026 — fact-checked by DuloCore Research. About our editorial process.