Water Heater Federal Tax Credit: $2,000 Heat Pump, $600 Gas

The water heater federal tax credit gives you back 30% of what you spent on a qualifying unit and its installation, capped at $2,000 for a heat pump water heater or $600 for a gas, propane, or oil model. There is a hard deadline attached: the One Big Beautiful Bill Act, signed in July 2025, ended the Energy Efficient Home Improvement Credit for any water heater placed in service after December 31, 2025.¹ If your water heater was fully installed and operational by that date, you can still claim the credit on the 2025 return you file in 2026.

What controls the deadline is the installation date, not the purchase date. A unit bought in November 2025 and installed in January 2026 does not qualify. No credit is available for a water heater placed in service after December 31, 2025, regardless of when it was ordered.

Which Water Heaters Qualify

The equipment has to be brand new. Used and refurbished units are out, even if they meet the efficiency numbers. The model must also meet or exceed the highest efficiency tier set by the Consortium for Energy Efficiency (CEE), excluding any advanced tier, as of the beginning of the year it was installed.²

The credit then splits water heaters into two categories, and which one you fall into determines your ceiling.

Heat Pump Water Heaters: Up to $2,000

Electric and natural gas heat pump water heaters sit in the more generous bucket. The maximum annual credit is $2,000, but that $2,000 is shared with heat pumps used for heating and cooling and with biomass stoves or boilers.³ So if you also installed a heat pump HVAC system the same year, the combined credit for both projects still caps at $2,000. For 2025 installations, qualifying heat pump water heaters generally need a Uniform Energy Factor (UEF) of at least 3.30 for units under 55 gallons.

Gas, Propane, and Oil Water Heaters: Up to $600

Combustion water heaters qualify under a separate category with a lower ceiling of $600 per unit. That $600 sits inside a broader $1,200 annual cap covering central air conditioners, furnaces, boilers, and electrical panel upgrades.³ Gas storage models need a UEF of at least 0.81 for tanks under 55 gallons, or at least 0.86 for tanks 55 gallons and larger.⁴

Verifying Your Specific Model

Efficiency claims on marketing materials do not always match what the credit actually requires. The Department of Energy runs a Tax Credit Product Lookup Tool where you can enter your model number and installation year to confirm the unit meets the CEE tier.⁵ Two minutes there is cheaper than an IRS notice later.

Who Can Claim the Credit

The residence rules for water heaters are looser than for windows, doors, and insulation, which require the home to be your principal residence and one you own. For a water heater, the home only needs to be located in the United States and used as a residence by the taxpayer. Renters who paid for their own qualifying water heater installation can claim the credit, and so can owners of second homes they personally use.⁶

Two firm exclusions apply. Landlords who install water heaters in properties they rent out but never live in cannot claim the credit.⁶ And the home must be an existing structure you are improving, not a newly constructed home.² If you bought a new-build with a heat pump water heater already installed, you personally cannot claim the credit on your return.

How the 30% and the Caps Work Together

Your qualified costs are the price of the water heater plus the labor to install it.² The credit is 30% of that total, subject to the category cap. Spend $3,500 on a heat pump water heater plus $1,500 on the plumber, and your $5,000 in qualified costs produces a $1,500 credit. Spend $8,000 and the 30% calculation gets you to $2,400, but the credit is limited to $2,000.

The annual limits sit inside two buckets:

$2,000 combined for heat pump water heaters, heat pump HVAC systems, and biomass stoves or boilers
$1,200 combined for gas, propane, or oil water heaters (with a $600 per-unit sublimit), central air conditioners, furnaces, boilers, and electrical panel upgrades
$3,200 maximum overall if you made improvements in both categories during the same year

Nonrefundable, and No Carryforward

This is the part that catches people. The credit is nonrefundable, so it can bring your federal income tax down to zero but will not generate a refund on its own. Any portion you cannot use in the year of installation is lost. The IRS does not allow this credit to be carried forward to a later year.⁷ If you owed $800 in federal income tax and earned a $2,000 credit, you benefit from $800 of it and the rest disappears.

Electrical Panel Upgrades

Heat pump water heaters usually run on a 240-volt circuit, and many older homes need a panel upgrade to support one. If you had your panel, subpanel, branch circuits, or feeders upgraded as part of the water heater project, that work qualifies for its own credit of up to $600, within the same $1,200 annual cap.⁸

Two technical conditions apply. The electrical work must meet the National Electric Code, and the upgraded panel must have a load capacity of at least 200 amps.⁸ The panel upgrade must also be installed in conjunction with the water heater or another qualifying energy improvement that it enables. If the panel and the water heater were installed in consecutive tax years, a safe harbor lets you treat both as installed in the later year for credit purposes.

Records to Keep

Nothing gets attached to your return, but you need to hold on to the paperwork in case of an audit. The most important document is the manufacturer’s certification statement confirming that your specific model meets the required efficiency standards. You can rely on that written certification when claiming the credit.⁸

Also keep the purchase receipt showing the unit price, the installer’s invoice with labor itemized separately, and something documenting the installation date. If you are also claiming the panel-upgrade credit, keep the electrician’s invoice and any permit records. Standard guidance is to keep tax records for at least three years after filing.

Filing the Credit on Your Return

The credit is claimed on Form 5695 (Residential Energy Credits), which you attach to your Form 1040.⁹ Water heaters go in Part II, Section B (Residential Energy Property Expenditures). Enter your total qualified costs on the line matching your water heater type, and the form does the 30% math and applies the annual caps.¹⁰ The resulting credit flows to Schedule 3.

What Remains After 2025

With the tax credit terminated for new installations, the main federal incentive still available for water heaters is the Home Electrification and Appliance Rebate (HEAR) program, created by the Inflation Reduction Act and administered by individual states. HEAR offers point-of-sale rebates of up to $1,750 for a heat pump water heater, applied as a discount at purchase rather than claimed on a return.¹¹

Eligibility is income-based. Households below 80% of area median income can receive rebates covering up to 100% of the cost, capped at the per-item limit. Households between 80% and 150% of area median income can receive up to 50% of the cost. Households above 150% are not eligible.¹²

Each state runs its own version, so availability varies. Some states have already used up their allocated funds and are keeping waitlists; others are still accepting applications or have not fully launched. Check your state energy office’s website before planning a purchase around HEAR. Unlike the federal tax credit, these rebates are open to renters as well as homeowners.

1
Internal Revenue Service. FAQs for Modification of Sections 25C, 25D, 25E, 30C, 30D, 45L, 45W, and 179D Under Public Law 119-21
2
Internal Revenue Service. Energy Efficient Home Improvement Credit
3
Internal Revenue Service. Energy Efficient Home Improvement Credit – Qualifying Expenditures and Credit Amount
4
ENERGY STAR. Water Heaters (Natural Gas) Tax Credit
5
Department of Energy. Tax Credit Product Lookup Tool
6
Internal Revenue Service. Energy Efficient Home Improvement Credit – Qualifying Residence
7
Internal Revenue Service. Energy Efficient Home Improvement Credit – Timing of Credits
8
Internal Revenue Service. Instructions for Form 5695 (2025)
9
Internal Revenue Service. About Form 5695, Residential Energy Credits
10
Internal Revenue Service. 2025 Instructions for Form 5695
11
Department of Energy. Home Upgrades
12
ENERGY STAR. Home Electrification and Appliances Rebate Program