Heat Pump Water Heater Tax Credit in 2026

Last reviewed: September 23, 2026 (UTC)

Most homeowners searching this now are really asking a timing question: does a heat pump water heater still qualify for the federal tax credit in 2026? The window has closed for new projects. The One Big Beautiful Bill Act (OBBBA), signed July 4, 2025, terminated the Section 25C credit for any property placed in service after December 31, 2025.

The IRS Energy Efficient Home Improvement Credit page and ENERGY STAR's heat pump water heater tax-credit page confirm the federal 25C credit for qualifying heat pump water heaters applies to projects placed in service on or after January 1, 2023 and by December 31, 2025. In plain language: if your qualifying unit was placed in service by the end-of-2025 deadline, meaning installed and ready for use, you can still claim the credit on your 2025 federal return filed in 2026. If your project is placed in service in 2026 or later, the federal 25C credit no longer applies.

Quick answer

Your situation	Practical answer
Your qualifying heat pump water heater was placed in service by Dec. 31, 2025	You can still claim the federal credit on your 2025 return, through IRS Form 5695, if the model, QMID, residence, costs, and records meet the rules.
You are shopping for a new 2026 installation	The federal 25C credit no longer applies. OBBBA ended it for property placed in service after Dec. 31, 2025.
You want to know the old credit amount	The rule for qualifying projects was 30% of eligible cost, up to $2,000 for the heat pump, heat pump water heater, and biomass bucket. The credit is nonrefundable, and unused 25C credit does not carry forward.
You are not sure your home type qualifies	IRS and ENERGY STAR guidance covers an existing U.S. home you improve or add onto, not a newly built home. For heat pump water heaters, the residence-use rule can include a second home and renters who make eligible improvements.
You are unsure whether your model qualifies	Use the exact model and installation year in the official DOE lookup, then retain the ENERGY STAR and manufacturer records that support the claim.
You still need savings help in 2026	Start with state and utility rebates, then separate those program rules from any federal tax filing.

Is the heat pump water heater tax credit still available in 2026?

For a brand-new installation in 2026, the answer is no. OBBBA terminated the 25C credit for property placed in service after Dec. 31, 2025, as confirmed on the IRS credit page.

Here is the key distinction:

Placed in service by Dec. 31, 2025: you can still claim the credit on your 2025 return.
Placed in service in 2026 or later: the federal 25C credit no longer applies.

Filing in 2026 and placing the property in service in 2026 are different events. The IRS says to claim the credit for the tax year when the property is installed, not merely purchased. A 2025 purchase date therefore does not preserve a credit for a unit placed in service in 2026.

How much was the heat pump water heater tax credit worth?

For qualifying projects placed in service before the deadline, the federal rule was:

30% of eligible project cost
Up to $2,000 for the heat pump, heat pump water heater, and biomass category

The broader Energy Efficient Home Improvement Credit had a $3,200 annual maximum, divided between a $1,200 group for several efficiency improvements and a $2,000 group for heat pumps, heat pump water heaters, and biomass equipment. Multiple projects in one year therefore had to fit within the applicable category limits.

The IRS and ENERGY STAR's federal tax credit overview also say the credit is nonrefundable. It can reduce your federal tax liability to zero, and unused 25C credit cannot be carried into a future tax year.

The important 2026 takeaway is this: the old dollar amount only matters if the project fits the official placed-in-service window and the other eligibility rules, and if you have enough tax liability to use the credit.

Who could still qualify?

At the broader 25C level, the IRS and ENERGY STAR's federal tax credit overview say this credit is for an existing home in the United States that you improve or add onto, not a newly built home.

For electric or natural gas heat pump water heaters, the residence rule is broader than the principal-residence-only rule for some other 25C items. ENERGY STAR says the home must be in the United States and used as a residence by the taxpayer, including a second home. The IRS FAQ also says this category includes renters who make eligible improvements.

The practical read is:

it must be an existing home you improve or add onto, not a newly built home
the home must be in the United States
it must be used as a residence by the taxpayer
that can include a second home
renters may qualify when they make the eligible improvement
a landlord who does not live in the property cannot claim the credit for that property

Mixed business use has its own allocation rule. The IRS says a property used solely for business does not qualify, while a qualifying home with more than 20% business use can receive a credit based on the nonbusiness share of eligible expenses.

What equipment actually qualified?

A common mistake is treating every efficient water heater as if it lands in the same credit bucket.

The relevant equipment category is heat pump water heaters. A standard tankless water heater, standard electric water heater, or another non-heat-pump setup should not be assumed to qualify for the same $2,000 category.

If you are still comparing those equipment categories directly, the guide to heat pump water heater vs. tankless water heater explains why only the heat-pump option fits this tax-credit category.

For a 2025 claim, the official model and installation-year path is:

Start with the exact model number from the product nameplate, product documentation, or quote. The DOE lookup identifies model numbers as the alphanumeric identifier used by a manufacturer, and it also accepts an AHRI Certified Reference Number when applicable.
Open the DOE 25C Product Lookup for water heaters. Choose the 2025 installation year, select the product brand when available, and enter the exact model number or AHRI reference number.
Save the results page. DOE says the tool uses manufacturer-submitted rated-efficiency data to determine whether the model shows compliance with the applicable CEE highest numeric performance Tier. The result is an efficiency-tier record for this federal credit, not a decision about every other rebate or incentive.
Match the model to the ENERGY STAR heat pump water heater requirements. ENERGY STAR identifies heat pump water heaters that have earned ENERGY STAR as eligible and says the equipment must meet or exceed the CEE highest efficiency tier, excluding any advanced tier, in effect at the beginning of the calendar year.
Retain the manufacturer's written certification. The 2025 Form 5695 instructions say taxpayers can rely on a written manufacturer certification that a product is qualifying property and should keep it for their records. For property placed in service in 2025, the same instructions require a valid four-character Qualified Manufacturer Identification Number (QMID) for each specified item.

DOE also says its results represent manufacturer submissions and come without a warranty about data accuracy. A favorable lookup result does not change the deadline: a unit placed in service in 2026 or later has no federal 25C credit.

How to claim the credit if your project was placed in service by the deadline

If your heat pump water heater was placed in service by the end-of-2025 deadline and otherwise qualifies, use this filing workflow:

Document the placed-in-service date. The purchase date alone is not enough. The IRS says the credit belongs to the tax year when the property is installed, and the Form 5695 instructions treat costs as paid when the original installation is completed.
Bring together the model, manufacturer certification, and QMID. For a 2025 claim, the IRS says no credit is allowed for specified property unless the item came from a qualified manufacturer and the taxpayer reports the required QMID on the return.
Use the 2025 Form 5695, Part II, Section B. On the 2025 Form 5695, line 29c asks for the QMID and cost of the most expensive electric or natural gas heat pump water heater. Line 29d covers the cost of other qualifying heat pump water heaters. The 2025 Form 5695 instructions explain the section and limits.
Save the full project file. Keep the itemized invoice, proof of payment, model number, DOE results page, ENERGY STAR or manufacturer support, written manufacturer certification, QMID support, and installation completion records together.
Apply the rebate treatment before doing the math. The IRS incentive guidance says public-utility subsidies and purchase-price rebates generally reduce the qualified cost. A state energy-efficiency incentive reduces the cost only when it qualifies as a rebate or purchase-price adjustment under federal tax law.
Remember the usable credit can be smaller than the headline cap. The credit is nonrefundable, so the usable amount cannot exceed the federal tax liability limit for the year. Unused 25C credit cannot carry forward.
Keep everything after filing. The IRS says records may be needed to establish the credit and the home's adjusted basis if the property is later sold.

If you need a line-by-line filing walkthrough, use Watt Wallet's Form 5695 Instructions guide next.

What paperwork should you save?

At minimum, keep:

itemized invoice showing equipment and installation scope
proof of payment
exact model number and product details
the DOE model-and-year results page
ENERGY STAR or manufacturer qualification support
the written manufacturer certification
the QMID and any manufacturer document that supplies it
installation completion or placed-in-service records
permit or inspection records if they apply to your job
rebate paperwork if another incentive touched the same project

The 2025 Form 5695 instructions say the written manufacturer certification does not go with the return, but it should be kept for your records. The same instructions require the QMID on the applicable line for qualifying 2025 property.

Tax credit vs rebate vs utility incentive in 2026

These are separate savings paths.

Incentive path	Timing	Biggest homeowner mistake
Federal heat pump water heater tax credit	Claimed with tax filing for a qualifying prior placed-in-service project	Treating a 2026 filing date as proof that a project placed in service in 2026 still qualifies
State or federal rebate program	Program-specific, often earlier than tax filing	Assuming the rebate follows the old federal tax-credit rules
Utility rebate	Utility-specific timeline and contractor or equipment rules	Counting the rebate and the tax credit on the same dollars without applying the IRS treatment

For many homeowners shopping in 2026, the more practical savings path is now a combination of state rebates, utility rebates, and careful quote comparison, rather than the old federal-tax-credit assumption.

What to do if you are shopping in 2026

If your installation has not happened yet, use this order of operations:

Start with a current heat pump water heater rebate or state and utility program search.
Ask the contractor to put the exact model eligibility, installer requirements, and rebate assumptions in the quote.
Separate the quote into equipment, labor, rebates, and tax assumptions.
Keep the federal 25C line at zero for a project placed in service in 2026 or later.
Keep the project file organized before you sign.

Helpful next reads:

Common mistakes to avoid

treating filing in 2026 as the same thing as placing the property in service in 2026
assuming every water heater or tankless replacement qualifies for the heat pump water heater bucket
relying on an installer's verbal claim without an exact model, installation year, and manufacturer record
forgetting that rebates can affect the qualified-cost calculation
saving only the receipt and leaving out the DOE result, QMID, and manufacturer support
using stale pre-2026 articles that still describe the federal credit as open for new projects

FAQ

Is there a heat pump water heater tax credit in 2026?

For a brand-new 2026 installation, no. OBBBA terminated the federal 25C credit for property placed in service after Dec. 31, 2025. For a qualifying unit placed in service by Dec. 31, 2025, you can still claim the credit on your 2025 return.

Can I still claim the credit in 2026 for a 2025 installation?

Yes. If the unit was placed in service by the end-of-2025 deadline and otherwise met the rules, you claim it on your 2025 federal return filed in 2026. Filing in 2026 is different from placing the property in service in 2026, and the installed property belongs to the tax year in which it was installed.

Is there an income limit for this tax credit?

The current official guidance does not present a simple homeowner income-threshold table for this specific heat pump water heater credit. The main checks are timing, residence use, model eligibility, documentation, and the treatment of the project's costs.

Can I claim it if I install the water heater myself?

Yes. The IRS self-install FAQ says taxpayers can claim the credit for qualified property they install themselves. Self-installation alone does not settle the claim: the unit still needs to be new qualified property in an existing U.S. home used as a residence, meet the applicable efficiency requirement, and fall within the placed-in-service deadline. For a 2025 claim, the QMID must be reported. IRS guidance allows labor costs properly allocable to onsite preparation, assembly, or original installation of qualified energy property. It does not state that a homeowner's unpaid time creates a separate eligible expense, so do not add a value for your own labor to the supported cost basis.

What form do I file?

Use IRS Form 5695, Residential Energy Credits, for the tax year in which the qualified property was installed. For a 2025 project claimed on a return filed in 2026, use the 2025 form and instructions.

Do I need a QMID for a 2025 claim?

Yes. The 2025 Form 5695 instructions require a valid QMID for each specified property item placed in service in 2025. For a heat pump water heater, the 2025 form places the QMID and cost of the most expensive unit on line 29c, with other qualifying units on line 29d.

If you are planning a new 2026 installation, start with Watt Wallet's Heat Pump Rebates by State guide and keep those program rules separate from any 2025 federal tax filing.