Incentives for efficiency and clean energy

Federal tax credits, utility rebates, and state programs can meaningfully offset the cost of a greener home. Here is how the major categories work — and how to find what applies to your address.

Green upgrades often pay back through lower bills, but incentives shorten that payback directly. They come in layers: federal tax credits, utility rebates, and state and local programs. The rules carry conditions, caps, and expiration dates, and they change with legislation, so treat everything below as a map of the landscape and confirm current specifics with the authoritative sources named here before you count on a number.

Watch: “Home of the Future: Zero-Energy Passive House” — TDC. A look at the kind of high-performance home these incentive programs are designed to encourage. See all builds →

Federal residential clean-energy credit (25D)

The federal Residential Clean Energy Credit (Internal Revenue Code Section 25D) is a tax credit for homeowners who install qualifying renewable-energy systems — solar photovoltaics, solar water heating, small wind, geothermal heat pumps, and battery storage. It is administered by the IRS and claimed on your federal return. The credit is a percentage of the system cost; because the exact percentage, eligible technologies, and timeline are set by federal law and have been amended over time, verify the current terms directly with the IRS (see IRS guidance on the Residential Clean Energy Credit) and consult a tax professional before relying on it.

Federal energy-efficient home-improvement credit (25C)

A separate federal credit, the Energy Efficient Home Improvement Credit (Section 25C), applies to efficiency upgrades to an existing home — things such as insulation and air-sealing, exterior windows and doors, and qualifying high-efficiency equipment including certain heat pumps and heat-pump water heaters. This credit typically carries annual limits and per-item caps rather than a single lifetime cap, and many items must meet specific efficiency criteria (often tied to ENERGY STAR or CEE tiers). As with 25D, the amounts and qualifying-product rules are set in federal law and change, so confirm the current year's limits and eligible products with the IRS before purchasing.

Important

25C and 25D are federal tax credits, not instant discounts. They reduce your federal tax liability when you file, and eligibility, percentages, caps, and deadlines are set by law and periodically revised. Always verify the current-year rules with IRS guidance and a qualified tax professional. This page is educational and not tax advice.

Utility rebates

Many electric and gas utilities offer their own rebates for efficient equipment — heat pumps, heat-pump water heaters, insulation, smart thermostats, and more — and for participating in energy audits or demand-response programs. Unlike tax credits, rebates are often paid closer to the point of purchase. Because they are utility-specific, the way to find them is to check directly with your own electric and gas providers, or use the aggregators below.

State and local programs

States, counties, and municipalities run a wide range of their own incentives: income-tax credits, sales-tax exemptions on efficient equipment, property-tax treatment for solar, low-interest financing, and more. There may also be federal or state rebate programs for home efficiency and electrification delivered through state energy offices; availability and timing differ by state as programs roll out. Your state energy office is the authoritative source for what is live where you are.

How to find what applies to you — DSIRE

The single best starting point is DSIRE — the Database of State Incentives for Renewables & Efficiency (dsireusa.org), a comprehensive, regularly updated database of U.S. incentives and policies for renewables and energy efficiency, maintained at N.C. State University with U.S. Department of Energy support. Search by your ZIP code and you will get federal, state, utility, and local programs in one place, with links to each program's own rules.

Incentive type	Source to confirm with	How it pays
Residential Clean Energy Credit (25D)	IRS	Federal tax credit at filing
Energy Efficient Home Improvement Credit (25C)	IRS	Federal tax credit, annual limits
Utility rebates	Your electric / gas utility	Rebate near purchase
State / local programs	State energy office; DSIRE	Varies (credit, rebate, financing)

Sources: IRS guidance on the Residential Clean Energy Credit (25D) and Energy Efficient Home Improvement Credit (25C); DSIRE (dsireusa.org); your local utility and state energy office. Figures and eligibility are set by law and program rules that change over time — verify current terms before acting. This is educational information, not tax or financial advice.

Frequently asked

Are 25C and 25D discounts or tax credits?

They are federal tax credits, claimed on your federal return through the IRS, not instant point-of-sale discounts. They reduce your tax liability when you file. Percentages, caps, eligible products, and deadlines are set by federal law and have been revised over time, so confirm the current-year rules with IRS guidance and a tax professional.

What is the difference between the 25C and 25D credits?

Section 25D, the Residential Clean Energy Credit, covers renewable-energy systems such as solar PV, solar water heating, geothermal heat pumps, and battery storage. Section 25C, the Energy Efficient Home Improvement Credit, covers efficiency upgrades to an existing home such as insulation, windows and doors, and qualifying high-efficiency equipment, and typically carries annual limits.

How do I find incentives for my specific address?

Use DSIRE (dsireusa.org), the Database of State Incentives for Renewables & Efficiency, maintained at N.C. State University with U.S. DOE support. Search by ZIP code to see federal, state, utility, and local programs in one place. Also check directly with your electric and gas utilities and your state energy office.

Do utilities offer their own rebates?

Yes. Many electric and gas utilities offer rebates for heat pumps, heat-pump water heaters, insulation, smart thermostats, energy audits, and demand-response participation. These are utility-specific and often paid near the time of purchase, so check with your own providers or look them up via DSIRE.