Windows and the Federal Energy Tax Credit: What Kansas City Homeowners Need to Know in 2026
Last updated: April 2026
The federal Energy Efficient Home Improvement Credit (Section 25C) — the tax credit that paid 30% of qualifying window costs up to $600 per year — expired on December 31, 2025. Windows installed in 2026 or later do not qualify for the federal credit, and Congress is not expected to revive it. If you installed windows in 2025 and haven't filed your 2025 taxes yet, you can still claim the credit on your 2025 return (filed in 2026), provided your windows met the strict ENERGY STAR Most Efficient certification and you have the manufacturer's QMID code. For installations in 2026 or later, the math now relies on direct energy savings, comfort, and home value — not federal tax incentives.
This guide walks through what just changed, how to claim the credit if you qualify for the 2025 tax year, what's still available at the state and local level for KC homeowners, and how the absence of the federal credit affects the case for window replacement in 2026 and beyond.
What just changed (the short version)
For several years, the federal government offered tax credits to homeowners who installed energy-efficient windows. The credit went through multiple iterations — most recently, it was significantly expanded by the Inflation Reduction Act of 2022 and was scheduled to remain available through 2032.
That changed when the One Big Beautiful Bill Act (OBBBA) was signed into law on July 4, 2025.
OBBBA accelerated the termination of several clean energy tax credits, including:
- Section 25C — Energy Efficient Home Improvement Credit: terminated December 31, 2025
- Section 25D — Residential Clean Energy Credit (solar, geothermal, etc.): terminated December 31, 2025
- Section 45L — New Energy Efficient Home Credit: terminates June 30, 2026
- Section 25E and 30D — Clean vehicle credits: terminated September 30, 2025
For Kansas City homeowners, the most relevant of these is Section 25C — the credit that covered windows, doors, insulation, and HVAC efficiency upgrades.
The IRS uses the "placed in service" date to determine eligibility, meaning the installation completion date — not the purchase date or the contract signing date. A window contract signed in November 2025 with installation completed in February 2026 does not qualify. The actual installation must have been completed by December 31, 2025.
If you installed windows in 2025
If your windows were installed and placed in service on or before December 31, 2025, you can still claim the federal credit on your 2025 tax return (filed in 2026). Here's what that looks like.
What you can claim
For the 2025 tax year:
- 30% of the cost of qualifying windows
- Capped at $600 per year for windows specifically
- Within a broader $1,200 annual cap for all building envelope improvements (windows, doors, insulation combined)
A few important nuances:
Doors are capped separately. $250 per door, $500 maximum across all doors. Doors and windows together count toward the $1,200 building envelope cap.
Heat pumps, biomass stoves, and biomass boilers have their own $2,000 cap that's separate from (and in addition to) the $1,200 cap on building envelope improvements. So the maximum total credit in 2025 was $3,200.
Product cost only — labor is not eligible. The credit covers the cost of the windows themselves but not the installation labor. Your contractor's invoice should separate these costs; if it doesn't, ask for a breakdown.
Primary residence only. The credit applies to your principal residence in the United States. Rental properties, vacation homes, and second homes don't qualify.
Nonrefundable credit, no carryforward. Section 25C is a nonrefundable credit, meaning it can reduce your tax bill to zero but cannot generate a refund beyond what you already owed. Unlike Section 25D (residential clean energy), Section 25C doesn't allow you to carry forward unused credits to future years. If your tax bill is less than the credit, the excess is lost.
What your windows need to qualify
This is where things got stricter for the 2025 tax year. Two specific requirements:
1. ENERGY STAR Most Efficient certification (not standard ENERGY STAR Certified).
This is a meaningful change. For earlier tax years, basic ENERGY STAR Certified windows qualified. For 2025, only the higher-tier "Most Efficient" designation qualifies.
For the North-Central climate zone (which includes Kansas City), Most Efficient designation requires:
- U-factor ≤ 0.20
- SHGC ≤ 0.40
This is essentially triple-pane territory for most window products. Standard double-pane windows with low-E and argon, even high-quality ones, typically don't meet the Most Efficient threshold.
2. Qualified Manufacturer Identification Number (QMID).
The IRS now requires you to include the manufacturer's QMID on Form 5695. This is a unique identifier the manufacturer assigns to specific products that meet the eligibility criteria. Without the QMID, the credit will be disallowed if your return is audited.
Manufacturers like Marvin, Pella, Andersen, and Sunrise have published QMIDs for their qualifying window lines. The contractor or manufacturer should provide the QMID on your project documentation. If you don't have it, contact the manufacturer's customer service or the dealer who sold your windows.
How to claim it
File IRS Form 5695 (Residential Energy Credits) with your 2025 federal tax return. Part II is dedicated to the Section 25C credit.
You'll need:
- Total cost of qualifying windows (product cost only, not labor)
- Manufacturer name and QMID
- Documentation that the windows meet ENERGY STAR Most Efficient criteria
- Date the windows were placed in service
Keep all documentation — receipts, invoices, manufacturer certifications, QMID confirmation — in case of audit. The IRS has signaled stricter enforcement on these credits, so documentation matters.
Consult a tax professional if you're unsure. Particularly if your project was complex, partially completed in 2025, or involved multiple types of improvements. The credit rules have specific edge cases that benefit from professional guidance.
If you're installing windows in 2026 or later
This is the bigger group — most KC homeowners considering window replacement in 2026 are working without the federal credit. What this changes:
The federal incentive is gone. Don't budget for it. Don't let any contractor claim "you'll get money back from the IRS" for a 2026 installation — that's outdated information.
The math now relies on direct benefits. Energy savings, comfort improvements, home value, and avoided repair costs — all real, but not the same as a $600 tax credit.
Watch for outdated content online. Most of the existing window-related content on the internet was written when the credit was active. Many sites still reference the credit as if it applies. Be skeptical of any source claiming federal tax benefits for 2026 window installations.
The credit may not return. Congress is not currently expected to revive Section 25C. Future legislation could change this, but planning around speculative future credits isn't sound budgeting.
The honest framing: federal incentives for residential energy efficiency upgrades have effectively ended for now. Future legislation may restore them, but homeowners deciding on window replacement in 2026 should plan based on the current legal reality.
What's still available for Kansas City homeowners
While the federal credit is gone, several state and local options may still apply.
Evergy energy efficiency programs
Evergy (the regional electric utility serving most of the KC metro) periodically offers rebates and incentive programs for energy-efficiency upgrades. These programs change annually. As of early 2026, Evergy's residential programs primarily focus on:
- HVAC efficiency upgrades
- Insulation rebates
- LED lighting upgrades
- Smart thermostat installations
Window-specific Evergy rebates have been limited historically. Worth checking Evergy's current program offerings directly (evergy.com) for any window-related incentives that may be available.
Spire (natural gas) programs
Spire, the regional natural gas utility, also occasionally offers efficiency rebates. Their programs primarily focus on heating equipment but may include building envelope improvements. Worth checking spireenergy.com for current programs.
Kansas state programs
Kansas state-level energy efficiency programs are limited but worth checking. The Kansas Energy Office (kcc.ks.gov/energy) maintains current information on any state-level incentives.
Missouri state programs
Missouri's energy efficiency programs are similarly limited at the state level. The Missouri Department of Natural Resources (dnr.mo.gov) maintains information on current state programs.
City-level programs
Some KC metro cities offer their own efficiency incentive programs, particularly for homes participating in green building certification programs. These are typically small and program-specific. Check your specific city's website for any current offerings.
Manufacturer rebates
Window manufacturers occasionally offer their own rebates and promotions. Marvin, Pella, Sunrise, and others run promotional offers throughout the year — typically $100-500 off specific product lines, sometimes with installation incentives. These are not tax credits but can reduce project cost. Reputable contractors will surface available manufacturer promotions when they're applicable to your project.
Property tax incentives
Some KC metro cities and counties offer property tax exemptions or assessment reductions for energy efficiency improvements. These are typically more relevant for major renovations than for window replacement alone. Worth checking with your county assessor if you're doing a comprehensive efficiency upgrade.
The math without the federal credit
Even without the tax credit, window replacement still pencils out for most homeowners staying in their home long-term. Here's the honest breakdown.
Energy savings
A typical KC home replacing aging single-pane or early double-pane windows with current-generation low-E argon windows sees energy bill reductions of $200-600 per year. Over a 25-year window service life, that's $5,000-15,000 in cumulative energy savings.
The savings vary based on:
- What you're replacing (older single-pane or aluminum windows save more; newer mid-quality vinyl saves less)
- Home size (larger homes, more savings)
- Climate exposure (homes with extensive west-facing windows see larger summer cooling savings)
- Energy prices (savings scale with rate increases over time)
For most KC homes, energy savings represent a meaningful but not project-justifying benefit on their own.
Resale value recovery
Per the Journal of Light Construction's most recent Cost vs. Value report, vinyl window replacement in Kansas City returns approximately 59% of cost at resale. Wood window replacement returns approximately 58%.
A $20,000 window project recovers roughly $11,800 at sale, on average. Net loss in pure resale ROI: $8,200.
This number alone makes window replacement look like a poor investment — but it doesn't capture the comfort, energy savings, and avoided repair costs that compound over the hold period.
Avoided repair costs
If your existing windows are failing — seal failure, frame rot, broken mechanisms — you'll spend money on them anyway. Failed IGUs run $200-500 per window to replace. Significant frame repair on rotted wood windows can run $300-1,500 per window. If your project is replacing 12-20 windows that are nearing end-of-life, the avoided repair cost is real, often $3,000-10,000+ over the next 10 years.
Comfort and quality of life
The non-financial benefits — fewer drafts, more even room temperatures, better sound dampening, modern aesthetics — have real value to most homeowners but resist quantification. Most homeowners who replace windows describe the comfort improvement as the most noticeable benefit, beyond any financial calculation.
Combined math for typical hold periods
Putting it together for a typical $20,000 KC window replacement project:
5-year hold:
- Energy savings: ~$2,000
- Resale recovery: ~$11,800 (if selling)
- Comfort: real but unquantified
- Net cash recovery: $13,800 against $20,000 spent
- Project usually pencils out negative on pure ROI
10-year hold:
- Energy savings: ~$4,000
- Resale recovery: ~$11,800 (if selling)
- Avoided repair costs: ~$2,000-5,000
- Net cash recovery: $17,800-20,800
- Project usually breaks roughly even
15+ year hold:
- Energy savings: ~$6,000+
- Resale recovery: ~$11,800 (if selling)
- Avoided repair costs: ~$4,000-8,000
- Net cash recovery typically exceeds project cost
- Project pencils out positive
The federal tax credit, when it was available, added roughly $600 per year to the math. Its absence doesn't fundamentally change the calculation but does shift it slightly negative. For homeowners staying long-term and replacing genuinely failing windows, the project still makes sense. For homeowners considering "preventive" replacement of functional windows specifically to capture tax benefits, the math no longer works.
How to think about your project decision
A practical framework for 2026 and beyond:
If your windows are genuinely failing, replace them. The energy savings, comfort, and avoided repair costs justify the project regardless of tax credits. Failed windows represent ongoing costs (energy losses, comfort issues, eventual repairs) that don't go away by waiting.
If your windows are aging but still functional, the timing decision now depends on your hold period and budget. Long-term homeowners (15+ years) benefit from replacement; shorter-term homeowners may benefit from waiting unless windows are actively problematic.
If you were planning replacement specifically for the tax credit, reconsider. The credit's expiration changes the project's financial profile. If the underlying need wasn't strong enough to justify the project without the credit, it's probably not strong enough now.
If you're replacing for aesthetic or comfort reasons, those benefits still apply. Windows are a quality-of-life investment that doesn't fully recover financially, but the comfort improvement is real and immediate.
For more on the timing decision specifically, see our when to replace your windows guide.
What might come back
Federal energy efficiency tax credits have a long history of expiring and being revived. The Section 25C credit specifically has gone through multiple iterations:
- Created in 2005
- Expired in 2007, revived
- Expired again in 2010, revived
- Expanded under the Inflation Reduction Act in 2022
- Terminated under OBBBA in 2025
It's plausible — though not predictable — that some form of energy efficiency credit returns in future legislation. Possible scenarios:
- A future Congress passes a replacement credit, possibly with different parameters
- A different mechanism (rebates rather than tax credits) takes the place of Section 25C
- State-level credits expand to fill the federal gap
We're not making predictions. The current legal reality is that no federal credit applies to 2026 or later window installations. Plan accordingly.
If a new credit is enacted, we'll update this guide. Subscribers and customers will be notified. In the meantime, planning around current law is the only sound approach.
Frequently asked questions
Did the federal window tax credit really expire?
Yes. Section 25C — the Energy Efficient Home Improvement Credit — expired on December 31, 2025, under the One Big Beautiful Bill Act (OBBBA), signed into law on July 4, 2025. Windows installed in 2026 or later do not qualify for the federal credit.
Why did the credit expire if it was supposed to last through 2032?
The Inflation Reduction Act of 2022 extended the credit through 2032, but OBBBA accelerated its termination as part of broader changes to clean energy tax provisions. The political shift around clean energy incentives drove the change.
Can I still claim the credit if I installed windows in 2025?
Yes, if your windows were installed (placed in service) on or before December 31, 2025, and meet the eligibility requirements (ENERGY STAR Most Efficient certification and QMID documentation), you can claim the credit on your 2025 federal return.
What if my windows were ordered in 2025 but installed in 2026?
The IRS uses the "placed in service" date — meaning installation completion. Windows ordered in December 2025 but installed in February 2026 don't qualify. The actual installation must have been completed by December 31, 2025.
What's the difference between "ENERGY STAR Certified" and "ENERGY STAR Most Efficient"?
ENERGY STAR Certified is the basic threshold — windows that meet standard performance requirements for the climate zone. ENERGY STAR Most Efficient is a higher-tier designation requiring stricter performance metrics (for North-Central zone, U-factor ≤ 0.20). For 2025 tax credit eligibility, Most Efficient is required.
What's a QMID and why do I need it?
QMID stands for Qualified Manufacturer Identification Number. It's a unique identifier the manufacturer assigns to specific products that meet the IRS eligibility criteria. The IRS now requires you to include the QMID on Form 5695. If you can't get the QMID from your contractor or the manufacturer, the credit may be disallowed.
Can I carry forward unused 25C credits to a future year?
No. Section 25C is nonrefundable AND doesn't allow carryforward. If your tax bill is less than the available credit, the excess is lost. (Section 25D for solar/geothermal does allow carryforward, but that's a different credit.)
Are there any state-level credits in Kansas or Missouri?
Limited. Both states have small energy efficiency programs, but neither has a meaningful state-level window tax credit equivalent to the now-expired federal credit. Local utility programs (Evergy, Spire) and manufacturer rebates may apply. Check with each provider directly for current programs.
What about Evergy rebates for windows?
Evergy's residential efficiency programs have historically focused more on HVAC, insulation, and lighting than windows specifically. Window-related Evergy rebates have been limited. Check Evergy.com for current program offerings.
Should I rush to install windows in 2026 just in case the credit returns?
No. Don't make project timing decisions based on speculative future tax credits. If your windows need replacement now, replace them now based on current pricing and current incentives. If they don't, don't artificially accelerate the project.
Is the comfort benefit really worth the cost without the tax credit?
For most homeowners replacing genuinely failing windows, yes. The comfort improvement is immediate and noticeable — fewer drafts, more even temperatures, less outdoor noise. Combined with energy savings and resale value, the project still makes sense for long-term homeowners. The federal tax credit was a meaningful $600/year benefit, but it wasn't the project's primary financial justification.
Where can I check for the current tax credit status?
The IRS website (irs.gov) is the authoritative source for current tax law. The Energy Star website (energystar.gov) maintains current eligibility information for any active credits. We'll update this guide as policy changes.
What if my contractor still references the federal tax credit in their pitch?
That's a sign of outdated information at minimum, possibly intentional misrepresentation at worst. The credit's expiration was announced in July 2025 and took effect December 31, 2025 — there's been ample time for contractors to update their materials. A contractor still actively promoting the federal credit for 2026 installations is either uninformed or being deceptive. Worth pushing back or finding a contractor who's current on the law.
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If you're considering window replacement in 2026 and want to understand the real project cost without the federal credit, start with our estimator for a real range based on your specific home — 60 seconds, no contact info required for the instant range. Or read our complete cost guide for the broader KC pricing picture.
This guide reflects federal tax law as of April 2026. Tax law is subject to change. For specific tax advice on your individual situation, consult a qualified tax professional. We're not tax advisors and this content does not constitute formal tax or legal advice.
This page will be updated annually or whenever significant changes to relevant tax law occur.