What records should I keep for an energy tax credit or rebate?

The short answer

If you claim a federal energy tax credit or a home energy rebate, keep the documentation that proves what you bought, what it cost, when it was installed, and that the product met the program's requirements. The Internal Revenue Service's Energy Efficient Home Improvement Credit page shows why the details matter: the credit must be claimed for the year the property is installed, not the year you bought it, and items installed in 2025 generally require the manufacturer's qualified manufacturer identification number (QMID) to be reported on your return. The IRS's recordkeeping guidance gives the retention rule: keep your records as long as needed to prove the items on your tax return. For rebates, the Department of Energy's Energy Savings Hub explains that your state, territory, or Tribe runs the program and decides which products are eligible — so the program's own paperwork rules apply.

What the rule says

The IRS publishes the eligibility rules for the two main homeowner credits, and those rules define what your records must be able to prove:

• Placed in service, not purchased. The IRS says you must claim the Energy Efficient Home Improvement Credit for the tax year when the property is installed, not merely purchased, using Form 5695. The Residential Clean Energy Credit page states the credit is available for qualified property installed from 2022 through December 31, 2025, and is not available for property placed in service after that date. Your installation date documentation is the record that fixes the claim year.
• Manufacturer certification and QMIDs. For the Energy Efficient Home Improvement Credit, the IRS says that in 2025 no credit is allowed for an item of qualifying property unless it was produced by a qualified manufacturer and you report the qualified manufacturer identification number (QMID) for the item on your tax return. The IRS's qualified manufacturer requirements page says manufacturers must register, assign a QMID unique to each item, and label the item with it. ENERGY STAR's Federal Tax Credits page notes that while manufacturer registration was still in process, it was sufficient for 2025 installations to include the manufacturer's four-digit QM code on the return.
• Certified products and audits. Certain products must meet certification standards — for example, windows, doors, and skylights that meet ENERGY STAR Most Efficient certification requirements, and a home energy audit performed by a qualified home energy auditor certified by a qualified certification program, with an attestation of that certification. ENERGY STAR's How ENERGY STAR Works page explains that products earning the ENERGY STAR label are independently certified to meet strict efficiency standards — keep the certification documents or the labeled product documentation.
• Rebates reduce what you can count. The IRS's Residential Clean Energy Credit page says qualified expenses are reduced by rebates that are based on the cost of the property and come from someone connected to the sale, such as the manufacturer, distributor, seller, or installer. It also notes that many states label incentives as rebates even when they do not qualify under federal tax law, and those may be includible in gross income. Keep the rebate paperwork for both the credit calculation and your own tax records.
• Retention. The IRS's recordkeeping guidance says the length of time you keep a document depends on the action, expense, or event it records, and that you must keep your records as long as needed to prove the income or deductions on a tax return.

Which authority controls

• Federal tax credits are governed by the IRS under Internal Revenue Code sections 25C (Energy Efficient Home Improvement Credit) and 25D (Residential Clean Energy Credit). The IRS's credit pages, Form 5695, and its recordkeeping guidance are the controlling federal references.
• ENERGY STAR is a voluntary labeling program administered by the U.S. Environmental Protection Agency. Its certification documents are evidence that a product meets efficiency standards, but ENERGY STAR is a reference for eligibility facts, not the tax authority.
• Home Energy Rebates under the Inflation Reduction Act are administered by the Department of Energy but run by your state, territory, or Tribe, which determines which products are eligible and manages the program paperwork. The DOE's Energy Savings Hub is the federal reference; the program you apply to controls the forms.

What may still be required or restricted

State, territorial, and Tribal rebate programs set their own application, documentation, and income-eligibility rules, so the paperwork can differ from program to program. Your state may also have its own tax incentives with separate record requirements — the IRS notes that many state incentives are labeled rebates but may be treated differently for federal tax purposes. Warranties and installer contracts can add their own documentation and retention requirements. Nothing reviewed here requires you to keep records forever, but the IRS rule — as long as needed to prove the items on your return — is the floor, not the ceiling.

Facts that could change the answer

• The year of installation. The credits currently phase out for property placed in service after December 31, 2025, and 2025 installations carry the qualified manufacturer (QMID) requirement. Confirm the rules for the year you install.
• Which product. Heat pumps, water heaters, central air conditioners, boilers, furnaces, biomass stoves, windows, doors, skylights, insulation, and home energy audits each have their own certification and documentation requirements.
• Which incentive. Tax credits, utility rebates, and state or Tribal rebates have different documentation rules, and rebates may reduce the expenses you can count toward a federal credit.
• Who you are. A contractor or landlord claiming business deductions may have additional recordkeeping obligations under the IRS's business recordkeeping guidance.

Practical decision path

1. Before you buy, confirm the product's eligibility and certification requirements (for example, ENERGY STAR certification or qualified manufacturer status) and save the product's certification documents.
2. At purchase, save the itemized receipt or invoice with the product, model, date, and price — including labor costs where they qualify.
3. At installation, save the installer's completion documentation and note the date the property was placed in service; this fixes the credit year.
4. For rebates, complete the program's application, save your approval notice and the amount paid, and reduce your qualified expenses by rebates based on the cost of the property as the IRS describes.
5. File with the documentation at hand, including the QMID or QM code where the 25C credit requires it, and keep everything as long as needed to prove the items on your return.

Records to keep

Keep a project folder containing: itemized receipts and invoices; product certification documents and the ENERGY STAR label or statement; the qualified manufacturer identification number (QMID) or QM code; installation and placed-in-service documentation; the home energy audit report and the auditor's certification attestation; the rebate application, approval, and payment records; and a dated log of purchases, installations, and filings. Scan paper records and back them up. The IRS's guidance is the retention rule to follow: keep records as long as needed to prove the items on your tax return — and longer when a warranty, contract, or state program requires it.

When professional advice may help

Consider a tax professional or attorney if you are unsure whether an expense qualifies, whether a rebate reduces your qualified expenses or is taxable income, or how the QMID requirement applies to your 2025 purchase; if you are claiming credits for multiple years or complex installations; or if you are a contractor or landlord with separate business recordkeeping obligations. A qualified professional can also confirm the paperwork your specific state or Tribal rebate program requires.

Before work begins, obtain the written requirement from the tax authority or program administrator and keep the record.