Manufacturer Certification Statement for Energy Tax Credits

A manufacturer certification statement for energy tax credits is a signed declaration from the company that made a product, confirming under penalties of perjury that the item meets the efficiency standards required to claim the Section 25C Energy Efficient Home Improvement Credit or the Section 25D Residential Clean Energy Credit. You keep the statement in your records as proof the equipment qualified. You do not send it to the IRS with your return.¹ Both credits were eliminated for property placed in service after December 31, 2025, but the documentation still matters for any 2025 installation you’re claiming on a return filed in 2026, and for defending prior-year claims.²

What the Statement Actually Does for You

The IRS cannot inspect every heat pump or window, so it pushes verification back to the manufacturer, which is the party in the best position to confirm technical specifications. The Form 5695 instructions tell taxpayers directly that they can rely on a manufacturer’s written certification as evidence that a product qualifies for the credit.¹

That reliance is the point. If you claimed a credit in good faith on the basis of a manufacturer’s certification and the product later turned out not to qualify, the certification is your defense. Without it, you have no safe harbor if the return is questioned.

What a Valid Certification Must Include

Under IRS guidance going back to Notice 2004-16 and subsequent updates, a usable certification contains all of the following:

The manufacturer’s full legal name and business address.
The product category (for example, central air conditioner, exterior window, heat pump water heater).
The specific model number, which must match the model on your purchase invoice or installer receipt exactly.
The performance data proving the product meets the applicable efficiency threshold. Windows had to meet ENERGY STAR Most Efficient criteria; heat pumps had to meet or exceed the highest efficiency tier set by the Consortium for Energy Efficiency at the start of the installation year.³
An explicit statement that the product is “qualified energy property” or an “eligible building envelope component” under Section 25C.
A declaration signed under penalties of perjury, which is what gives the document legal weight in an audit.

A certification missing the model number or the perjury language is vulnerable in an IRS review. The model number is the item most likely to trip you up: if the model on your invoice doesn’t match the model on the certification character for character, the IRS can conclude the specific unit you installed didn’t meet federal efficiency requirements.

The Extra Layer for 2025 Installations: QMID and PIN

For property installed on or after January 1, 2025, the certification alone is no longer enough for most items. Manufacturers had to register with the IRS as “qualified manufacturers” and receive a Qualified Manufacturer Identification Number (QMID). No credit is allowed for a 2025 installation unless the product came from a registered manufacturer and you report the QMID on your return.⁴

Each item of “specified property” also needs a Product Identification Number (PIN) assigned by the manufacturer, which you include on the return.⁵ Specified property covers most of the equipment eligible for the 25C credit: heat pumps, central air conditioners, water heaters, furnaces, boilers, biomass stoves, exterior doors, windows, skylights, and electrical panel upgrades.

Insulation and air-sealing materials are the exception. The IRS did not classify them as specified property, so their manufacturers did not have to register and the products do not have PINs.⁶ For insulation, the traditional manufacturer certification statement is what you keep.

The IRS publishes a list of qualified manufacturers, but appearing on that list doesn’t mean every product from that company automatically qualifies. You still need the certification and the model-specific documentation.⁷

Where to Find the Certification

Most major manufacturers post certification statements on their own websites, usually under a section labeled for tax credits, sustainability, or product specifications. If it isn’t online, check the packaging materials the installer left behind or the paperwork from the retailer. If neither turns it up, contact the manufacturer’s customer service and request the certificate for your specific model.

Once you have it, compare every detail against your installation records. The model number on the invoice must match the model number on the certification exactly. Confirm the certification covers the year the equipment was placed in service, because efficiency standards and qualifying criteria changed over time. For a 2025 installation of specified property, confirm the manufacturer is on the IRS qualified manufacturer list and that you have both the QMID and the PIN for each item.⁸

How the Documentation Is Used on the Return

You claim either credit on IRS Form 5695. Part I covers the Section 25D Residential Clean Energy Credit, and Part II covers the Section 25C Energy Efficient Home Improvement Credit. Information from the certification, plus the QMID and PIN for 2025 specified property, goes on the designated lines. The calculated credit then carries to Schedule 3 of Form 1040: Section 25D on line 5a, Section 25C on line 5b.⁹

Do not mail the certification with your return. The Form 5695 instructions say to keep it in your records instead. The same goes for receipts, invoices, and installer documentation.¹

How Long to Keep It, and What Happens If You Can’t Produce It

The IRS generally requires you to keep tax records for three years from the date you filed the return or two years from the date you paid the tax, whichever is later.¹⁰ Three years after filing is the safe minimum for energy credit records. If you underreported income by more than 25 percent, the audit window stretches to six years, so longer retention gives you extra protection. A digital copy stored alongside the paper original protects you if a folder goes missing.

If the IRS audits and you can’t produce the certification, you lose the reliance defense. Claiming a credit you weren’t entitled to can trigger the accuracy-related penalty of 20 percent of the underpayment attributable to the incorrect credit, on top of repaying the disallowed amount with interest.¹¹

When This Document Still Matters After the Credits End

The One Big, Beautiful Bill Act, signed on July 4, 2025, eliminated both the Section 25C and Section 25D credits for property placed in service after December 31, 2025.² A heat pump, solar system, or window replacement installed in 2026 gets no federal residential energy credit, so no certification is needed for it.

You still need certification documentation in two situations. Anything placed in service on or before December 31, 2025 and claimed on the 2025 return filed in 2026 requires the certification (and the QMID and PIN, where applicable). And if the IRS opens a review of an earlier year’s credit, the certification you kept at the time is what defends the claim. An unused Section 25D credit carried forward from 2025 into 2026 relies on the documentation you already assembled for the 2025 return; no new certification is created for the carryforward itself.¹

1
Internal Revenue Service. Instructions for Form 5695 – Residential Energy Credits
2
Internal Revenue Service. FAQs for Modification of Sections 25C, 25D, 25E, 30C, 30D, 45L, 45W, and 179D Under Public Law 119-21
3
ENERGY STAR. Windows and Skylights Tax Credit
4
Internal Revenue Service. Energy Efficient Home Improvement Credit
5
Internal Revenue Service. Energy Efficient Home Improvement Credit – PIN Requirements
6
Internal Revenue Service. Frequently Asked Questions – Energy Efficient Home Improvement Credit – Qualified Manufacturer
7
Internal Revenue Service. Energy Efficient Home Improvement Credit Qualified Manufacturers
8
Internal Revenue Service. Energy Efficient Home Improvement Credit Qualified Manufacturer Requirements
9
Internal Revenue Service. Form 5695 – Residential Energy Credits
10
Internal Revenue Service. How Long Should I Keep Records
11
Internal Revenue Service. Accuracy-Related Penalty