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Mass Save Heat Pump Rebate: Amounts, Eligibility, and Application Steps

Mass Save offers multiple Massachusetts heat pump rebate paths, plus 0% HEAT Loans, but the amount depends on the system type, whether the project is whole-home or partial-home, and whether you qualify for enhanced incentives.

Eligibility

Quick answer: yes, Mass Save still has meaningful Massachusetts heat pump rebate paths in 2026, but homeowners need to separate the air-source, air-to-water, and ground-source tracks before budgeting.

For standard residential air-source heat pumps, Mass Save currently advertises whole-home rebates of $2,650 per ton up to $8,500, partial-home rebates of $1,125 per ton up to $8,500, and basic rebates of $250 per ton up to $2,500. The same air-source page also lists income-based enhanced incentives up to $16,000 or up to no cost through Turnkey Services.

Mass Save's air-to-water page currently shows $2,650 per ton up to $8,500, with enhanced incentives up to $16,000 for income-qualified households. The ground-source page is different: whole-home rebates are listed at $13,500 per home, partial-home rebates at $2,000 per ton up to $13,500, and income-based enhanced incentives up to $25,000.

The standard Mass Save heat pump rebate paths generally require a pre-existing fuel type of oil, propane, or electric resistance. Cape Light Compact customers should not assume these exact numbers apply because the official Mass Save pages say Cape Light enhanced heat pump rebates differ from the amounts listed.

Whole-home paths are stricter than many homeowners expect. Mass Save says whole-home heat pump rebates are for customers who install heat pumps as the sole source of heating and cooling, and the Whole-Home Heat Pump Verification Form must be completed and signed. The official pages also tie whole-home eligibility to sufficient weatherization standards, with specific carveouts for newer homes, low-weatherization-need homes, or completed recommendations.

If you plan to keep a boiler or furnace in place, you are usually in the partial-home path instead. Mass Save's air-source page says partial-home applicants who keep oil, propane, or natural gas in some zones may need an integrated control from the qualified product list, unless the fossil-fuel heat is fully disconnected for the affected zone.

Mass Save also calls out two common bonus paths for partial-home air-source projects: a $500 weatherization bonus when you complete a Home Energy Assessment and recommended weatherization in the allowed window, and a $500 sizing bonus for systems sized to meet the home's total heating needs.

Finally, treat older federal-tax-credit assumptions carefully. The current Mass Save heat pump pages say the federal IRA heat-pump tax incentives expired at the end of 2025, so 2026 installs should not assume the old federal credit still applies without checking current IRS guidance for the actual project date.

How to apply

  1. Step 1: Decide which Mass Save track matches your project before you request quotes: air-source, air-to-water, or ground-source, and whether the project is whole-home, partial-home, or only a basic add-on system.
  2. Step 2: Confirm the core eligibility gates early: Massachusetts service territory, pre-existing fuel type, whether you are income-qualified, and whether your address falls under a utility sponsor or Cape Light Compact path with different rebate treatment.
  3. Step 3: Use the Mass Save Heat Pump Installer Network or another official qualifying-contractor path for your system type, and ask the contractor to give you AHRI capacity details, load calculations, and a line-item quote that separates equipment, labor, electrical work, and any incentive assumptions.
  4. Step 4: If you want a whole-home rebate, make sure the system will serve as the sole source of heating and cooling and review the Whole-Home Heat Pump Verification Form plus the weatherization requirement before installation.
  5. Step 5: If you are pursuing a partial-home rebate, verify whether integrated controls, sizing documentation, a Home Energy Assessment, or weatherization work are needed to preserve eligibility or qualify for the $500 bonus paths.
  6. Step 6: Use the official Mass Save online application portal to pre-verify eligibility when needed and then submit the rebate with invoices, required forms, load calculations, and any bonus-supporting documents. Keep the print-and-mail form only as a fallback path if the online route is not right for your project.
  7. Step 7: If cash flow matters, check whether the Mass Save HEAT Loan can cover part of the project. The current financing page says eligible homeowners may receive 0% financing up to $25,000 for qualifying upgrades, including heat pump projects.