Mass Save offers $75 per window when you upgrade single-pane windows to ENERGY STAR Most Efficient certified windows. This program is currently active and available to Massachusetts homeowners.
Mass Save offers $75 per window when you upgrade single-pane windows to ENERGY STAR Most Efficient certified windows. This program is currently active and available to Massachusetts homeowners.
The federal 25C tax credit expired on December 31, 2025. Mass Save is now the primary rebate option for MA homeowners replacing windows in 2026. Qualifying windows must meet ENERGY STAR Most Efficient certification, which is a higher bar than standard ENERGY STAR labeling.
What Massachusetts Homeowners Need to Know About Mass Save Window Rebates
- Rebate amount: Mass Save pays $75 per window for qualifying upgrades. You must be replacing single-pane windows with ENERGY STAR Most Efficient certified windows to qualify.
- Higher certification required: ENERGY STAR Most Efficient is a stricter standard than a basic ENERGY STAR label. Not every window qualifies, so product selection matters here.
- Federal credit is gone: The 25C tax credit expired at the end of 2025. For 2026 window projects, Mass Save is your best available rebate option in Massachusetts.
- CWE installs qualifying products: Coastal Windows & Exteriors is an ENERGY STAR Certified Partner. We install windows that meet Northern Region performance requirements for Massachusetts homes.
- Combine rebates with financing: Mass Save rebates can be combined with CWE’s financing options, available up to 20 years based on credit approval. That lowers your upfront cost and monthly payment at the same time.
- Ongoing energy savings add up: ENERGY STAR certified windows cut heating and cooling costs by up to 13% compared to non-certified products. Massachusetts households spend roughly $600 per month on energy, so that savings is real and recurring.
How to Stack Your Window Savings in Massachusetts
| Savings Option | Status | Amount | How to Access |
| Mass Save Rebate | Active | $75 per window | Upgrade single-pane to ENERGY STAR Most Efficient |
| Federal 25C Tax Credit | Expired 12/31/2025 | No longer available | 2025 filers only; consult a tax professional |
| Energy Bill Reduction | Ongoing | $500+/yr* | Install ENERGY STAR certified windows |
| CWE Financing | Available | Up to 20 years, credit-based | Combine with Mass Save rebate at time of purchase |
*When switching from single to triple pane windows
Best Savings for Replacement Windows in Massachusetts
Top Recommendation: ENERGY STAR Most Efficient certified windows through a Mass Save-eligible contractor. You get the $75-per-window rebate now and energy savings every month after. Contact Coastal Windows & Exteriors today for a free estimate!
Best for Budget: Pair your Mass Save rebate with CWE financing. Spreading costs over time while collecting a rebate upfront makes the project more accessible for most homeowners.
Best for Maximum Savings: Triple pane ENERGY STAR certified windows deliver over $500 per year in energy bill savings. Stack that with a Mass Save rebate to accelerate your payback timeline.
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 Windows, Doors & Skylights, ENERGY STAR’s official resource on certified window and door products and their energy-saving performance. (Accessed April 2026)
- Massachusetts households spend approximately $600 per month on energy bills. Boston.com Massachusetts Utilities Report, Boston.com’s report on what Massachusetts residents pay monthly for gas, electric, and other utilities. (2024)
- Upgrading from single-pane to triple-pane windows can save homeowners over $500 per year on energy bills. ENERGY STAR Windows, Doors & Skylights, ENERGY STAR’s guidance on the annual energy savings achievable through certified window upgrades. (Accessed April 2026)
- When a homebuilder upgrades windows from double- to triple-pane, the energy efficiency performance of the windows can improve by 40% or more. PNNL How Triple Pane Windows Stop Energy Loss, Pacific Northwest National Laboratory’s research on the thermal performance gains from triple-pane window technology. (2025)
