Every amount links to the official program. Last checked September 29, 2026.
Short answer: Mass Save pays up to $8,500 for an air-source heat pump, or up to $16,000 (sometimes no cost) for income-qualified homes. Insulation is 75% to 100% off after a free home energy assessment, heat pump water heaters get $750, and the 0% HEAT Loan covers up to $25,000. It's for Eversource, National Grid, Unitil and Cape Light Compact customers, not municipal light plant towns.
| Upgrade | Amount | Rules |
|---|---|---|
| Air-source heat pump | Up to $8,500 | Standard rebate. Install in 2026, apply by February 28, 2027. Source |
| Heat pump, income-qualified | Up to $16,000 or no cost | Moderate-income and income-eligible tiers. Source |
| Ground-source heat pump | $13,500, up to $25,000 | Source |
| Home energy assessment | Free | Owners and renters. Source |
| Insulation and air sealing | 75% to 100% off | 100% generally for income-qualified homes. Source |
| Heat pump water heater | $750 | Source |
| HEAT Loan | 0%, up to $25,000 | Up to 7 years. Source |
| Battery (ConnectedSolutions) | About $1,375 a year for a 5 kW battery | Paid for summer peak events. Source |
Amounts last checked September 29, 2026 against each program's official page (linked in each row).
See the exact rebates for your city on the MA rebates page, then compare top-rated installers by city, ranked by Google reviews. No one pays to be listed.
Towns with a municipal light plant (like Belmont, Concord or Holyoke) aren't in Mass Save. They have their own programs and the state's MLP Z-Loan.
Regulators cut the 2025-2027 Mass Save budget by $500 million in February 2025. Heat pump rebates of up to $8,500 are still offered.
Related: Mass Save home energy assessment · Home battery guides
Other program guides: BC Hydro rebates · CleanBC rebates · Home Renovation Savings · NYS Clean Heat · Efficiency Nova Scotia rebates · BC Hydro Peak Saver · Alberta energy rebates · Federal tax credits · PECO rebates · PPL Electric rebates · Xcel Energy Colorado rebates
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