The Federal 25C Tax Credit for High-Efficiency HVAC
The federal 25C credit is an income-tax credit for qualifying high-efficiency HVAC, worth a percentage of project cost up to an annual cap (with a higher allowance for heat pumps). We provide the documentation; confirm amounts with your tax professional.
The federal 25C credit is an income-tax credit for qualifying high-efficiency HVAC, worth a percentage of project cost up to an annual cap (with a higher allowance for heat pumps). We provide the documentation; confirm amounts with your tax professional.
What the 25C credit is
25C, the Energy Efficient Home Improvement Credit, is a federal income-tax credit (not a rebate check) for installing qualifying high-efficiency equipment like heat pumps, central AC, and furnaces. It reduces what you owe at tax time when your equipment meets the efficiency requirements.
How the mechanism works
The credit is structured as a percentage of the project cost up to an annual dollar cap, with a separate, higher allowance for qualifying heat pumps. The specific percentage and dollar caps are set by federal law and can change year to year, so we won't quote a figure that may be stale. We'll point you to the current amounts and your tax professional for the final number.
Where it gets missed
Homeowners miss it when they don't keep the right paperwork: you need proof the equipment meets the qualifying efficiency tier (AHRI certificate / manufacturer documentation) and the installation records. Without those, a qualifying system can't be claimed.
How we make it easy
We tell you whether the system you're considering meets a qualifying tier, and we hand you the AHRI / manufacturer documentation you (or your accountant) need to claim it. We stack it with CPS Energy rebates where both apply.
What to do next
Ask us which equipment qualifies before you buy, and confirm the current credit amount with a tax professional. Pair this with our CPS Energy rebates guide.
Frequently asked questions.
The questions we hear most on this topic. Yours not here? Call a real tech.
Ask a real techQ / 01Is the 25C credit a rebate or a tax credit?
It's a federal income-tax credit. It reduces your tax liability when you file, rather than a check at install. We provide the documentation you need to claim it.
Q / 02How much is the federal HVAC tax credit?
It's a percentage of project cost up to an annual cap, with a higher allowance for qualifying heat pumps. The exact figures are set by federal law and can change yearly. Confirm the current amount with your tax professional. We'll tell you if your equipment qualifies.
Q / 03What paperwork do I need?
Proof the equipment meets the qualifying efficiency tier (AHRI certificate / manufacturer documentation) plus your installation records. We hand you that documentation as part of the job.