Claim Window and Door Tax Credit – The federal Window and Door Tax Credit (officially the Energy Efficient Home Improvement Credit under IRC Section 25C) can significantly reduce your tax bill if you installed qualifying energy-efficient windows or exterior doors in 2025. As of April 2026, you can still claim this credit on your 2025 federal tax return—but only for improvements placed in service by December 31, 2025. The credit is no longer available for new installations in 2026 or later.
This guide, based on the latest IRS and ENERGY STAR guidance, walks you through everything you need to know to claim your credit successfully.
What Is the Window and Door Tax Credit?
The Window and Door Tax Credit is part of the Energy Efficient Home Improvement Credit (Section 25C). It rewards homeowners who upgrade their primary residence with energy-efficient exterior windows, skylights, and doors.
You can claim 30% of the cost of qualifying products (materials only—labor costs do not qualify for windows, doors, or skylights). The credit is capped annually and applies only to your main home in the United States.
Who Qualifies for the Window and Door Tax Credit?
To claim the credit, you must meet these IRS requirements:
- The home must be your primary residence (owned and lived in by you) located in the United States.
- It must be an existing home—new construction does not qualify.
- You cannot claim the credit as a landlord or for second homes/rentals.
- The products must be new with an expected lifespan of at least 5 years.
- Improvements must have been placed in service (installed and ready to use) between January 1, 2023, and December 31, 2025.
How Much Can You Claim for Windows and Doors in 2025?
Here are the 2025 credit limits (no lifetime cap, but annual only):
| Improvement | Credit Rate | Annual Limit per Category | Part of Overall $1,200 Building Envelope Cap |
|---|---|---|---|
| Exterior windows & skylights | 30% | $600 total | Yes |
| Exterior doors | 30% | $250 per door / $500 total | Yes |
Example: If you spent $2,500 on qualifying windows, you could claim up to $600 (30% of cost, capped). For two qualifying doors costing $1,000 total, you could claim up to $500.
The combined total for windows, doors, skylights, insulation, and air sealing cannot exceed $1,200 per year.
What Windows and Doors Qualify for the Tax Credit?
Not every window or door works—strict efficiency standards apply:
- Exterior windows and skylights: Must meet ENERGY STAR Most Efficient certification requirements. Verify using the product’s NFRC Certified Product Directory (CPD) number and your climate zone.
- Exterior doors: Must be ENERGY STAR certified.
To confirm eligibility:
- Find your climate zone on the ENERGY STAR website.
- Locate the CPD number on your product label.
- Search the NFRC directory to ensure it qualifies for your zone.
For 2025 installations, products must come from a qualified manufacturer—ask for the 4-digit Qualified Manufacturer Identification Number (QMID) and include it on your tax return.
Key Deadlines: Why 2025 Was Your Last Chance?
The Window and Door Tax Credit expired after December 31, 2025. Only installations completed and placed in service by that date qualify for the 2025 tax year (filed in 2026). There is no extension for 2026 or future years under current law.
Step-by-Step: How to Claim the Window and Door Tax Credit?
Follow these IRS steps to claim your credit:
- Verify eligibility — Confirm your home and products meet the rules above.
- Purchase and install — Buy and install qualifying products by December 31, 2025.
- Gather documentation — Keep receipts showing product costs (exclude labor), ENERGY STAR labels, CPD numbers, manufacturer certification, and the QMID (for 2025).
- File Form 5695 — Complete Part II of IRS Form 5695 (Residential Energy Credits) and attach it to your 2025 Form 1040.
You claim the credit for the tax year the products were placed in service—not the purchase year.
Required Documentation and 2025 Manufacturer Rules
Save these records in case of an audit:
- Purchase receipts (product costs only)
- Installation records
- ENERGY STAR / NFRC labels or certifications
- Qualified Manufacturer Identification Number (QMID) for 2025 products
Do not send documentation with your return—retain it for your records.
Common Mistakes to Avoid When Claiming
- Claiming labor or installation costs (only product/material costs qualify for windows and doors).
- Using products that don’t meet ENERGY STAR Most Efficient (windows/skylights) or ENERGY STAR (doors) standards.
- Forgetting to report the QMID on 2025 returns.
- Claiming for non-primary residences or new construction.
- Missing the December 31, 2025, deadline.
Frequently Asked Questions About the Window and Door Tax Credit
Can I claim the credit in 2026?
Yes—if you installed qualifying windows or doors in 2025. No for new 2026 projects.
Is the credit refundable?
No—it is nonrefundable and reduces your tax liability to zero but does not provide a refund for any excess.
Do state or utility rebates affect the credit?
You may need to reduce your credit by any rebates received—check IRS rules.
What if I installed in 2024 or earlier?
You could have claimed on prior returns (different rules applied before 2023). Amended returns may still be possible within the time limit.
Final Tips for Claiming Your Window and Door Tax Credit
The Window and Door Tax Credit offers meaningful savings for 2025 installations, but accurate documentation and timely filing are essential. Always double-check product eligibility with ENERGY STAR and consult a tax professional or use IRS Free File tools for your return.
For the official details, visit IRS.gov or ENERGY STAR’s federal tax credit pages. Act now while filing your 2025 taxes to secure your credit before the opportunity closes.