Do New Windows, Doors, or Insulation Earn a Tax Credit?

TL;DR: A federal credit does exist for certain energy-efficient windows, doors, and insulation, claimed on Form 5695, but the rule is built around a home you personally use as a residence, not a unit occupied full-time by a tenant. The percentage of cost covered and the annual dollar limits are set by statute and have been touched by recent legislation, so pull the current numbers from IRS.gov or the Form 5695 instructions before you file rather than reusing last year's figures. If the improvement is on a straight rental unit, it's usually handled as a depreciable asset or business expense instead.

_Last reviewed: August 2026 · 7 min read_

You replaced some old windows or added insulation and now you're wondering if it comes off your tax bill this year. The honest answer is: sometimes, but the rules hinge on who lives in the property, and this is one area where the exact dollar caps shift often enough that quoting last year's number can cost you.

Okoniq Property Hub logs your capital improvement receipts, dates, and property assignments in one place, so when it's time to sort out what's deductible, depreciable, or credit-eligible, you're not digging through a shoebox.

What federal tax credit applies to new windows, doors, and insulation?

The federal government offers an energy efficiency tax credit for qualifying building-envelope upgrades like exterior windows, exterior doors, insulation, and air sealing materials, claimed on Form 5695. That much is stable and well documented on IRS.gov.

What isn't safe to quote from memory is the percentage of the cost the credit covers and the annual dollar caps for each category. Those figures are set by statute and have shifted with recent tax legislation, including the One Big Beautiful Bill (P.L. 119-21), which reshaped a number of energy-related provisions starting in 2025. Because those specific caps weren't in the source verified for this article, the responsible move is to pull the current numbers directly from the Form 5695 instructions or your CPA rather than trust a number that's circulating online. Treat any blog post, including this one, that states a precise percentage or dollar figure without a current IRS citation with some skepticism.

Does this credit apply to a rental property, or only your own home?

Mostly, it applies to a home you use as a residence, not a property you rent out entirely to tenants who live there full-time. That distinction matters more to landlords than almost any other detail in this topic. The credit was designed around homeowners upgrading their own home, so a duplex you own but don't occupy, or a single-family rental with a tenant in place year-round, generally falls outside it.

Where it gets less clean-cut is owner-occupied situations: a house-hack duplex where you live in one unit and rent the other, or a second home you use part of the year. In those cases the portion of the property you personally occupy may qualify while the rented portion doesn't. This is exactly the kind of split-use question worth running past a CPA before you file, because the allocation method isn't something you want to guess at.

For the portion that's purely a rental, the cost of new windows, doors, or insulation is still relevant to your taxes, just through a different door: it's typically treated as a capital improvement and depreciated over time rather than credited dollar-for-dollar. If you're unsure whether a given repair counts as a deductible expense or a capital improvement you have to depreciate, the capitalize vs. expense decision tree walks through the test landlords actually use.

What qualifies as "energy efficient" enough to count?

Not every window or door swap qualifies. Products generally need to meet specific efficiency ratings set by the government (often tied to standards like Energy Star), and the manufacturer or installer should be able to confirm whether a specific product line meets the current requirement. Insulation materials typically need to meet a building code-referenced performance standard as well.

This is another spot where guessing is risky. Manufacturers change model lines, ratings bodies update thresholds, and a window that qualified two years ago may not carry the same certification today. Before you buy, ask the retailer or contractor for the manufacturer's certification statement for that specific product, and keep it with your other paperwork. If you're also weighing whether the same purchase might fall under a small-item expensing rule instead of a credit, the de minimis safe harbor at $2,500 is worth understanding for lower-cost items purchased for a rental.

How do you claim the credit and what records should you keep?

You claim it by filing Form 5695 with your federal return for the year the improvement was installed, not the year you paid a deposit or signed a contract. The IRS generally looks at when the property was "placed in service," meaning installed and ready for use, not just purchased.

Keep the manufacturer's certification statement, the itemized invoice showing labor and materials separately if possible, proof of payment, and a note of which property the improvement went into if you own more than one. If the improvement instead ends up depreciated as a rental capital improvement rather than credited, you'll want that same paperwork to support Form 4562, the form used to report depreciation. Photographing and storing receipts digitally is fine for IRS purposes as long as the image is legible and you can produce it on request, a point worth reading up on in how the IRS treats scanned receipts.

What if the IRS or a preparer questions the claim later?

Be ready to show the paper trail, not just the credit amount you claimed. Auditors typically ask for the invoice, the certification statement, proof of installation date, and confirmation of which property the work was done on. If your rental accounting is loose about which receipts belong to which address, that's the first thing to fix, and the rental property audit trail checklist covers what reviewers actually request.

FAQ

Can a landlord claim the windows and doors tax credit for a rental property?

Generally no, if the property is occupied full-time by a tenant, because the credit is built around a home you use as your own residence. Split-use properties like owner-occupied duplexes may allow a partial claim on the portion you live in, which is worth confirming with a CPA.

Does insulation installed in a rental still have tax value if the credit doesn't apply?

Yes, it's typically treated as a capital improvement and recovered through depreciation over the useful life of the property rather than claimed as a one-time credit.

Do I need a manufacturer's certification to claim the credit?

Yes, keep the manufacturer's certification statement for the specific product installed, since the efficiency rating standards that determine eligibility change over time and a general receipt alone won't prove the product qualified.

What form do I use to claim this credit?

Form 5695, filed with your federal income tax return for the year the improvement was placed in service, not the year you paid for it.

Where do I find the current dollar caps and percentage for this credit?

Check the current-year Form 5695 instructions on IRS.gov or ask your CPA, since the caps and percentages are set by statute and have been affected by recent legislation that changed multiple energy-related credits.

<div class="glass rounded-2xl p-5 mt-7 max-w-4xl border border-red-400/30 bg-red-500/5"> <div class="flex items-start gap-3"> <span class="text-2xl flex-shrink-0">⚠️</span> <div class="flex-1 min-w-0"> <p class="text-red-200 text-sm font-bold">Not tax advice</p> <p class="text-slate-300 text-xs mt-1 leading-relaxed"> This post assumes a general federal energy efficiency credit framework and deliberately omits specific dollar caps or percentages that were not independently verified against current IRS guidance. It does not account for your occupancy split, your state's own energy credits, your entity type, or legislation passed after July 2026. Tax rules change and depend on your specific situation. Talk to a licensed CPA before acting on anything here, and confirm current figures on IRS.gov. </p> </div> </div> </div>