What the Energy Tax Credit Covers

The federal energy tax credit — formally the Residential Energy Credits under Section 25C of the tax code — covers specific appliances and equipment that reduce your home's energy use. You claim the credit on your tax return the year you install the item. The credit is a dollar-for-dollar reduction in the federal income tax you owe, not a rebate or refund.

The appliances that may have access to fall into two categories: those that must meet Department of Energy efficiency standards, and those that must be installed by a licensed contractor. Some items may have access to under both rules. The credit covers the cost of the equipment itself, not labor or installation.

The credit is not refundable, meaning it can reduce your tax bill to zero but cannot generate a refund. If your tax liability is lower than the credit amount, you lose the unused portion — though you may be able to carry it forward to the next tax year depending on the specific credit rules in effect.

Key Takeaways

  • The energy tax credit covers heat pumps, water heaters, air conditioners, furnaces, and certain insulation and ventilation equipment that meet Department of Energy efficiency ratings.
  • You must keep the manufacturer's certification statement showing the product meets the required efficiency standard, along with your receipt or invoice.
  • Some items require installation by a licensed contractor to count; others do not, so check the specific rules for each appliance type.
  • The credit amount varies by appliance type and can range from $50 to $3,200 per item, with an overall annual cap that depends on which appliances you install.
  • You claim the credit on Form 5695 (Residential Energy Credits) when you file your federal tax return for the year the equipment was installed.

Appliances and Equipment That may have access to

Heat pumps — including air-source, ground-source, and mini-split models — may have access to if they meet the Department of Energy's Seasonal Energy Efficiency Ratio (SEER2) and Heating Seasonal Performance Factor (HSPF2) standards. The credit is up to $2,000 per heat pump. Installation by a licensed contractor is required.

Air conditioners may have access to if they meet the required SEER2 rating. Central air conditioners and window units both count, though window units do not require professional installation. The credit is up to $300 per unit.

Water heaters — electric, natural gas, and heat pump models — may have access to if they meet the Department of Energy's Uniform Energy Factor (UEF) standard. The credit is up to $300 for most models, though heat pump water heaters can may have access to for up to $2,000. Installation by a licensed contractor is required for some models; check the specific rules for your type.

Furnaces and boilers may have access to if they meet the required Annual Fuel Utilization Efficiency (AFUE) rating. The credit is up to $600 per unit. Professional installation is required.

Insulation, air sealing, and ventilation — including attic insulation, wall insulation, weatherstripping, and mechanical ventilation systems — may have access to if they meet specific R-value or performance standards. The credit is up to $1,200 per year for these items combined, and most do not require professional installation, though some ventilation equipment does.

Documents You Need to Keep

The Internal Revenue Service requires you to retain the manufacturer's certification statement for each appliance. This document confirms the product meets the required efficiency standard and is usually included in the product packaging or available from the manufacturer's website. You also need your receipt or invoice showing the purchase date and cost.

If a contractor installed the equipment, keep the contractor's invoice showing the installation date and the total cost. For items you installed yourself, photograph the equipment and keep any documentation showing when it was installed.

The IRS does not require you to submit these documents with your tax return, but you must have them available if the agency requests proof. Keep them for at least three years after you file the return claiming the credit.

How to Claim the Credit on Your Tax Return

You claim the energy tax credit on Form 5695 (Residential Energy Credits), which you file with your federal tax return. The form has separate sections for different types of credits and equipment. You will list each may have access to appliance, its cost, and the credit amount.

If you use tax preparation software, the software will typically walk you through the questions about what equipment you installed and calculate the credit for you. If you file by hand or work with a tax preparer, provide them with the manufacturer's certification statements and your receipts.

The credit applies to the tax year in which you placed the equipment in service — meaning the year you installed it and began using it. If you installed a heat pump in December 2024, you claim the credit on your 2024 tax return filed in 2025.

Annual Caps and Limits

The energy tax credit has an annual cap that varies depending on which appliances you install. For most items, the limit is $3,200 per year. However, heat pumps and heat pump water heaters have their own separate limits, and insulation and air sealing have a combined annual cap of $1,200.

If you install multiple items in the same year, the credits stack up until you reach the annual cap. Once you hit the cap, you cannot claim additional credits that year. Unused credits may carry forward to future years, though the rules for carrying forward depend on the specific credit and the tax year.

Check the current year's IRS instructions for Form 5695 to confirm the exact cap amounts, as these can change year to year.

Efficiency Standards and Certification

Each appliance type has specific Department of Energy efficiency ratings it must meet. These are not optional — if the appliance does not meet the standard, it does not may have access to for the credit, even if it is energy-efficient by other measures.

The manufacturer is responsible for testing the appliance and providing the certification statement. When you buy the appliance, ask the retailer or manufacturer for the certification document. Many manufacturers post this information on their websites or include it in the product manual.

The efficiency standards change periodically as the Department of Energy updates its rules. An appliance that may have access to in 2023 might not meet the 2024 standard, or vice versa. Always verify the current standard for the specific appliance type and model year before you purchase.

Frequently Asked Questions

Do I need a contractor to install the appliance for it to count?

It depends on the appliance. Heat pumps, furnaces, boilers, and most water heaters require professional installation by a licensed contractor. Insulation, weatherstripping, and window air conditioners typically do not. Check the Department of Energy's guidance or the manufacturer's certification statement for the specific item you are installing.

What if I installed the appliance before I knew about the tax credit?

You can still claim the credit if you installed it in the current or prior tax year and you have the required documentation. The credit applies to the year you placed the equipment in service, not the year you claim it on your return. However, you cannot go back more than a few years, so check the current rules.

Can I claim the credit if I rent my home?

No. The energy tax credit is only for owner-occupied homes. Landlords and property managers cannot claim it for rental units. If you rent and your landlord installs may have access to equipment, you do not benefit from the credit.

What if the appliance does not have a manufacturer's certification statement?

You cannot claim the credit without it. The certification statement is the proof that the appliance meets the required efficiency standard. If the manufacturer did not provide one, contact them directly and ask for it before you file your return.

Can I claim the credit if I bought the appliance used?

No. The credit only applies to new equipment. Used or refurbished appliances do not count, even if they meet the efficiency standard.