Everything Massachusetts homeowners need to know about combining ENERGY STAR® Most Efficient triple-pane windows, the $75/unit Mass Save® rebate, the 0% HEAT Loan, Municipal Light Plant programs, and the $600 Federal 25C Tax Credit.
Select your window count and preferred brand series below to launch your itemized breakdown:
Available when replacing existing single-pane windows with qualifying ENERGY STAR® Most Efficient triple-pane windows (U-Factor ≤ 0.20).
Finance up to $25,000 at 0.0% interest for 84 months through participating local Massachusetts community banks and credit unions.
Claim 30% of qualifying ENERGY STAR® Most Efficient window material costs (up to $600 directly off your federal tax liability).
Four North Shore towns operate municipal electric utilities (Ipswich ELD, Danvers Electric, Peabody PMLP, and Marblehead MMLD). If your home is heated by National Grid or Eversource natural gas, you still qualify for Mass Save® window rebates and HEAT Loans! If you heat with electricity or oil in an MLP town, you can utilize your town's NextZero / HELPS municipal energy audit rebates plus the $600 Federal 25C Tax Credit.
No. Under current 2026 Mass Save® program rules, replacement windows must meet ENERGY STAR® Most Efficient criteria (typically Triple-Pane Low-E Argon with U-Factor ≤ 0.20) and must replace existing single-pane windows verified during a Home Energy Assessment.
First, schedule a no-cost Mass Save® Home Energy Assessment (virtual or in-person) so the energy specialist verifies your single-pane windows. Then, Pioneer provides you with a signed Contractor Proposal containing exact NFRC U-Factor and SHGC product numbers so Mass Save® issues your 0% HEAT Loan Authorization Form.
No! Unlike Mass Save®, the Federal Section 25C Energy Efficient Home Improvement Tax Credit (30% of material cost up to $600/year for windows and up to $500 for exterior doors) applies whenever you install qualifying ENERGY STAR® Most Efficient windows, regardless of whether your old windows were single-pane or double-pane.
Pick your window count, compare Harvey, Mathews Brothers, Andersen, and Marvin side-by-side, and check your Mass Save® rebate eligibility online.
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