Federal Heat Pump Tax Credit 2026 ($2,000 + IRA Rebates)

Two different credits — know which applies

The most important thing to understand about heat pump tax credits is that there are two separate federal credits, and which one you get depends on the type of heat pump:

• Air-source heat pumps use the Energy Efficient Home Improvement Credit (25C): 30% of cost, capped at $2,000 per year.
• Geothermal (ground-source) heat pumps use the Residential Clean Energy Credit (25D): 30% of cost with no dollar cap — the same uncapped credit solar gets.

This distinction is worth thousands of dollars. On a $30,000 geothermal system the credit is $9,000; on a $30,000 air-source system it is capped at $2,000. Most websites blur this — getting it right is the single most valuable thing on this page.

The air-source credit (25C): up to $2,000

For a qualifying air-source heat pump, the 25C credit gives you 30% of the project cost up to $2,000 in a given tax year. Key features:

• The unit must meet the CEE highest efficiency tier requirements for your region — not every heat pump qualifies, so confirm the model.
• The $2,000 heat pump cap is separate from (and can combine with) other 25C measures, within an overall annual limit.
• Crucially, the credit resets every year, so staggering projects across tax years can let you claim it more than once.

Estimate your installed cost and credit with the Heat Pump Cost Calculator, which applies the correct credit automatically.

The geothermal credit (25D): 30%, no cap

Geothermal heat pumps are treated like solar: they qualify for the Residential Clean Energy Credit at 30% of the total cost with no maximum, locked through 2032. Because geothermal systems cost $18,000–$45,000, this uncapped credit is often worth $6,000–$13,000 — far more than the air-source cap.

That generous credit is a big reason geothermal can pencil out despite its high upfront cost, especially for long-term owners. Run the numbers with the Geothermal Calculator, and compare against air-source in our GSHP vs ASHP guide.

The 25C annual limits explained

The 25C credit has a layered cap structure that confuses many homeowners:

So in a single year you can claim up to $2,000 for a heat pump plus up to $1,200 for other efficiency upgrades, for a combined $3,200. Because the limits reset annually, a multi-year electrification plan can capture more total credit than doing everything at once.

HEEHRA rebates: up to $8,000

On top of the tax credits, the Inflation Reduction Act funds state-administered HEEHRA rebates for income-qualified households. For a heat pump, eligible households can receive up to $8,000 as a point-of-sale discount — far more than the 25C credit.

Availability and income thresholds vary by state as each rolls out its program. See our IRA guide and your state energy office.

What costs qualify

For the 25C heat pump credit, qualifying costs generally include the equipment and the installation labor for a heat pump meeting the efficiency requirements. For the 25D geothermal credit, the eligible cost is broader — the full system including ground-loop installation, much like solar.

What does not qualify: routine repairs to an existing system, oversized luxury upgrades beyond what the home needs, and (for 25C) units that fail to meet the CEE tier. Always get the model's certification from your installer and keep the itemized invoice.

How to claim the credits

1. Confirm eligibility — that the model meets the required efficiency tier (25C) or is a qualifying geothermal system (25D).
2. Keep documentation — itemized invoice, manufacturer certification, and the placed-in-service date.
3. File IRS Form 5695 — Part II for the 25C air-source credit, Part I for the 25D geothermal credit.
4. Apply for HEEHRA rebates separately through your state's program, usually via a participating contractor at the point of sale.

The tax credits reduce what you owe on your federal return; the rebates are handled by your state. A CPA can confirm sequencing if you are combining several incentives.

Refundable? Carryforward?

The 25C air-source credit is non-refundable and does not carry forward — you must have enough tax liability in the year you install to use it, and any excess is lost. This is different from solar. So if your tax liability is low, the timing of an air-source install matters.

The 25D geothermal credit is non-refundable but does carry forward to future years, like the solar credit, so you rarely lose any of it. HEEHRA rebates are not tax items at all — they are upfront discounts — so they do not depend on your tax liability, which is why they are especially valuable for lower-income households.

Is the credit worth it for higher earners?

HEEHRA rebates are income-targeted, so higher-income households generally cannot access the $8,000 rebate. For them, the tax credits are the main federal support — and this is exactly where the air-source-versus-geothermal distinction becomes decisive. A high earner installing air-source is capped at the $2,000 25C credit, whereas the same household installing geothermal claims an uncapped 30%, which can be five or six times larger in dollar terms.

So for higher-income homeowners who want to maximize federal support, geothermal's uncapped credit is uniquely attractive despite its higher sticker price, and air-source buyers should lean on utility rebates and the annual reset of the 25C credit to stretch the benefit. Lower- and moderate-income households, by contrast, should prioritize the HEEHRA rebate, which usually dwarfs the tax credit and is an upfront discount rather than a tax-time benefit.

Documentation you'll need

Whichever credit applies, keep a clean paper trail. You will want the itemized invoice showing equipment and labor separately, the manufacturer's certification statement confirming the model meets the required efficiency tier, and a record of the date the system was placed in service. For geothermal, retain documentation of the full installed cost including the ground loop, since that all qualifies under 25D.

If you also claim a HEEHRA rebate, that is handled through your state program — usually applied at the point of sale by a participating contractor — and is separate from your tax filing. Keep those rebate records too, because they can affect the cost basis you use for the tax credit. When several incentives are in play, a brief review with a CPA ensures you claim everything correctly and in the right order.

Stacking it all together

The incentives combine. An income-qualified household installing an air-source heat pump could, for example, receive an $8,000 HEEHRA rebate and a 25C credit on the remaining cost, dramatically cutting the net price. A higher-income household installing geothermal gets the uncapped 30% credit on the full system.

Worked example: air-source vs geothermal

To see why the two credits matter so much, compare two households. The Lees install a qualifying air-source heat pump for $16,000. Their 25C credit is 30% of cost, capped at $2,000, so they receive exactly $2,000 — their net cost is $14,000 before any state rebate. The Morenos install a $32,000 geothermal system. Their 25D credit is 30% with no cap, so they receive $9,600, bringing their net to $22,400.

The geothermal system costs far more upfront, but the uncapped credit covers a much larger share of it, and its running costs are the lowest of any system. For the air-source household, the bigger lever is often the HEEHRA rebate if they qualify — up to $8,000 dwarfs the $2,000 tax credit. The right strategy depends on which incentives you can actually access, which is why it pays to check both before choosing a system.

Timing your install for the 25C credit

Because the 25C air-source credit is non-refundable and does not carry forward, the year you install matters more than it does for solar. You need enough federal tax liability in that single year to absorb the credit, or you lose the unused portion. If your income or tax situation varies, plan the install for a year when you will owe at least as much as the credit you expect.

The annual reset is also an opportunity. Because the $2,000 heat pump cap and the separate $1,200 cap for other improvements both refresh each year, a homeowner electrifying a whole house can spread projects across tax years — heat pump one year, heat pump water heater and insulation the next — and claim the credit multiple times rather than hitting a single-year ceiling. A short conversation with a CPA before scheduling work can be worth real money.

Heat pump water heaters qualify too

It is easy to overlook, but a heat pump water heater — which heats your domestic hot water using the same efficient heat-pump principle — also qualifies for the 25C credit, worth up to $1,750 for income-qualified households under HEEHRA and a share of the 25C credit otherwise. These units use roughly a third of the energy of a conventional electric water heater.

Pairing a heat pump for space heating with a heat pump water heater is a natural electrification step, and because the credits and rebates cover both, the combined incentives can be substantial. If you are already upgrading your heating, it is worth pricing the water heater at the same time to capture the available support efficiently.

Don't forget utility and state incentives

Federal credits and HEEHRA are only part of the picture. Many electric utilities offer their own heat pump rebates — often several hundred to a couple of thousand dollars — to encourage electrification and shift load, and some states run additional programs beyond HEEHRA. These stack on top of the federal credit, further lowering net cost.

Because these programs change frequently and vary by location, check the ENERGY STAR rebate finder, the DSIRE database and your own utility's website before you buy. Combining a utility rebate, a state program, the 25C credit and (if eligible) HEEHRA can turn a $16,000 heat pump into a far smaller net outlay. See your state incentives as a starting point.

Common mistakes

• Assuming any heat pump qualifies for 25C — only models meeting the CEE highest tier do.
• Confusing the air-source cap with the geothermal credit — they are very different ($2,000 vs uncapped).
• Forgetting that 25C doesn't carry forward — install in a year you have the tax liability to use it.
• Missing HEEHRA — income-qualified households leave the largest incentive unclaimed by not checking their state program.