Energy-Efficient Home Improvement Credit: What Qualifies in 2025

TL;DR: The Energy Efficient Home Improvement Credit (IRS Section 25C) covers 30% of the cost of qualifying upgrades, capped at $1,200 a year for most items and $2,000 a year for heat pumps, heat pump water heaters, and biomass stoves. Under the One Big Beautiful Bill Act signed in July 2025, this credit ends for any property placed in service after December 31, 2025, so this is the last calendar year to install and claim it.

_Last reviewed: August 2026 · 7 min read_

You've heard there's a tax credit for new windows, insulation, or a heat pump, but the rules are scattered across IRS forms and manufacturer marketing pages that don't agree with each other. Here's what actually qualifies, how much you get back, and why the clock on this one is closing fast.

Okoniq Property Hub helps homeowners and landlords log which upgrades were installed and when, so the paperwork is ready if the IRS or a future buyer ever asks.

What is the Energy Efficient Home Improvement Credit?

It's a federal tax credit, officially Section 25C, that reimburses 30% of the cost of specific energy-saving home upgrades. It's a nonrefundable credit, meaning it reduces your tax bill dollar for dollar but won't generate a refund beyond what you owe.

The credit was expanded and extended through 2032 by the Inflation Reduction Act in 2022. It applies to your primary residence and, for some items like insulation and doors, to a second home you own but don't rent out. It does not cover new construction. If you're weighing a big system replacement like a furnace or panel upgrade to support a heat pump, this credit changes the math, especially alongside guidance on 100 vs 200 amp service if your panel needs upgrading to handle new electric equipment.

What upgrades actually qualify?

Insulation, exterior doors and windows, certain HVAC equipment, and home energy audits all qualify, but each has its own dollar cap. Here's the breakdown for tax year 2025:

| Upgrade | Credit Rate | Annual Cap | |---|---|---| | Insulation & air sealing | 30% of cost | $1,200 (combined with windows/doors) | | Exterior windows | 30% of cost | $600 | | Exterior doors | 30% of cost | $250 per door, $500 total | | Central AC, gas furnaces, boilers (high efficiency) | 30% of cost | $600 | | Heat pumps & heat pump water heaters | 30% of cost | $2,000 (separate cap) | | Biomass stoves/boilers | 30% of cost | $2,000 (separate cap) | | Home energy audit | 30% of cost | $150 | | Electrical panel upgrade (needed for above) | 30% of cost | $600 |

Note the $1,200 general cap and the $2,000 heat pump cap are separate, so in theory a household could claim up to $3,200 in one tax year if they did enough qualifying work. A gas furnace has to meet the highest efficiency tier set by the Consortium for Energy Efficiency (CEE) to count, not just standard Energy Star certification.

How much can you actually claim per year?

You can claim up to $1,200 a year for most upgrades, plus up to $2,000 a year for heat pumps or biomass equipment, but the credit does not carry forward to next year if you don't use it. That's a key difference from the solar credit (Section 25D), which does allow unused amounts to roll forward.

Because the caps reset annually, spreading a renovation across two tax years can sometimes get you more total credit than doing it all at once, if labor and material costs run high enough to hit the cap in a single year. For example, replacing windows ($600 cap) one year and adding attic insulation ($1,200 cap, shared with doors) the next year captures both caps instead of losing value to the combined limit. If insulation work is on your list, checking signs your attic ventilation is failing first can help you fix airflow problems before sealing anything in.

How do you claim it, and what records do you need?

You claim it using IRS Form 5695 when you file your federal return for the year the equipment was installed, not the year you paid a deposit. Keep the manufacturer's certification statement, the itemized invoice showing labor versus materials, and the model or product ID numbers, because installation labor only counts toward the credit for HVAC and biomass equipment, not for windows, doors, or insulation.

Save these documents for at least three years after filing, which is the standard IRS audit window. Landlords should be careful here: this credit applies to your personal residence, not rental units you don't live in. If you're weighing which appliances or systems are costing you the most on your utility bill before deciding what to upgrade, five appliances quietly running up your electric bill is a good place to start narrowing the list.

Why is 2025 the deadline to act?

The One Big Beautiful Bill Act, signed into law in July 2025, terminates the Energy Efficient Home Improvement Credit for any property placed in service after December 31, 2025. That's roughly seven years earlier than the original 2032 sunset date under the Inflation Reduction Act.

This means the installation date, not the purchase date, is what matters. If you order a heat pump in November 2025 but it isn't installed and running until January 2026, you miss the credit entirely. Contractors are already booking out weeks in advance in many markets, so anyone planning a furnace, heat pump, or insulation job to claim this credit needs to schedule it now, not in December.

FAQ

Does the Energy Efficient Home Improvement Credit apply to rental properties?

No. It's limited to your primary residence, with insulation, windows, and doors also allowed on a second home you personally use. Rental properties you don't live in are excluded, though landlords may have separate depreciation options through a CPA.

Can I combine this credit with a state or utility rebate?

Yes, in most cases. Federal tax credits and state or utility rebates (like those under the Home Efficiency Rebates program) generally stack, though the rebate amount usually reduces the cost basis you use to calculate your 30% federal credit.

What happens to unused credit amounts?

They're lost. Unlike the solar Residential Clean Energy Credit, the Energy Efficient Home Improvement Credit does not carry forward to future tax years, so any amount above your tax liability for that year simply expires.

Do I need a professional energy audit to claim other credits?

No, but it helps. A qualified home energy audit itself is credited at 30% up to $150, and the report it generates gives you documentation that supports claims for insulation, HVAC, or window upgrades if the IRS asks for justification.

Is the $2,000 heat pump cap separate from the $1,200 general cap?

Yes. Heat pumps, heat pump water heaters, and biomass stoves and boilers fall under their own $2,000 annual limit, separate from the $1,200 cap that covers insulation, windows, doors, and standard HVAC equipment.

This is educational information, not tax advice. Talk to a CPA about how Form 5695 applies to your specific situation, especially with the 2025 program-end date affecting installation timing.