New windows no longer qualify for the federal 25C tax credit in 2026. The credit expired on December 31, 2025. Massachusetts, New Hampshire, and Maine homeowners can still access rebates through the Mass Save program.
New windows no longer qualify for the federal 25C tax credit in 2026. The credit expired on December 31, 2025. Massachusetts, New Hampshire, and Maine homeowners can still access rebates through the Mass Save program.
Mass Save offers $75 per window for qualifying upgrades from single-pane to ENERGY STAR Most Efficient certified windows. That rebate is still active and available right now. Switching to ENERGY STAR certified windows can cut heating and cooling costs by up to 13%.
What Massachusetts Homeowners Need to Know About Window Incentives
- Federal credit is gone: The 25C tax credit expired at the end of 2025. Work done in 2026 does not qualify for any federal window tax credit.
- 2025 filers still qualify: Windows installed before December 31, 2025 were eligible for 30% of costs, up to $600. Check with a tax professional if this applies to you.
- Mass Save rebates are active: Eligible Massachusetts homeowners can receive $75 per window. You must upgrade from single-pane to ENERGY STAR Most Efficient certified windows to qualify.
- Certified windows perform: ENERGY STAR certified windows cut heating and cooling costs by up to 13% compared to non-certified products. That savings continues year after year.
- Energy Efficient Window Installation: Coastal Windows & Exteriors ENERGY STAR certified with a U-Factor of 0.16. The Northern Region requires 0.27 or lower, so it exceeds the standard.
- Long-term savings add up: Upgrading from single to triple pane windows saves over $500 per year on energy bills. Rebates lower your upfront cost while efficiency lowers your monthly bills.
Comparing Your Window Incentive Options in 2026
| Incentive | Status | Who Qualifies | Potential Savings |
| Federal 25C Tax Credit | Expired 12/31/2025 | 2025 filers only | Up to $600 |
| Mass Save Rebate | Active | MA homeowners replacing single-pane | $75 per window |
| Energy bill savings | Ongoing | All ENERGY STAR window buyers | Up to 13% on heating/cooling |
Top Recommendation: ENERGY STAR certified windows through Mass Save for Massachusetts homeowners. You get the rebate now and the energy savings every month after. Contact Coastal Windows & Exteriors for energy efficient windows certified by ENERGY STAR! Free estimates available now.
Best for 2025 Filers: File IRS Form 5695 before your tax deadline. Consult a tax professional to confirm eligibility and claim your credit.
Best for Long-Term Value: Triple pane windows deliver the strongest energy performance. Pair them with Mass Save rebates to reduce your out-of-pocket cost today.
Request a free window estimate from Coastal Windows & Exteriors.
Browse our complete window FAQ guide from Coastal Windows & Exteriors.
Explore our Windows Exterior Remodeling Home Improvement Help Center.
Last Updated: April 2026
Sources:
- Installing ENERGY STAR certified windows, doors, and skylights can reduce heating and cooling costs by an average of up to 13% compared to non-certified products. ENERGY STAR Residential Windows, Doors & Skylights, ENERGY STAR’s official product page on energy-efficient windows, doors, and skylights and their impact on home energy bills. (Accessed April 2026)
- Upgrading from single- to triple-pane windows can save homeowners over $500 per year on energy bills. ENERGY STAR Residential Windows, Doors & Skylights, ENERGY STAR’s product guidance on the energy cost savings associated with high-performance window upgrades. (Accessed April 2026)
