How to Apply
Federal credits, state programs, utility rebates — what to file and in what order.
Step-by-step
The 4-step rebate application sequence
Federal credits, state programs, and utility rebates each have their own paperwork. The order matters — apply for utility rebates BEFORE you file your taxes for federal credits, because some utility programs require pre-approval before purchase.
What documentation you'll need
- Proof of homeownership — recent property tax bill, deed, or mortgage statement
- Itemized contractor invoice — separating equipment cost from labor/installation
- Equipment make and model numbers — must match the program's qualified-products list
- AHRI certification number (HVAC and heat pumps) — confirms equipment matches the rated efficiency
- Manufacturer's Certification Statement (for federal 25C credit) — confirms equipment meets IRS-defined efficiency standards
- Pre-installation home energy assessment (DOE HOMES only) — modeled energy savings determine your rebate amount
- For DOE HEAR: proof of household income (W-2, tax return, or other verification)
Federal tax credit timing
Federal credits (25C and 25D) are claimed on the tax return for the year the equipment was placed in service — meaning the year it was installed and operational, not the year you signed the contract or received the equipment. Keep all documentation; the IRS may audit your claim up to 3 years later.
Common mistakes that disqualify rebates
- Buying equipment before checking the qualified-products list
- Skipping pre-approval when the utility requires it
- Missing the post-install submission window (typically 30-90 days)
- Using an unlicensed or unapproved contractor (some programs require certified installers)
- Trying to claim the same dollar of cost on multiple programs that disallow stacking
Pro tip: Email
us your state, utility, and the upgrade you're considering BEFORE you sign the contract. We'll send you a one-page rebate stack showing exactly what you qualify for and the application order. Free.