Mass Save Program in Massachusetts | Rebates & Energy Savings
The Mass Save program is the largest energy efficiency initiative in Massachusetts - see the mass save rebates, energy audit mass save process, and mass save income eligible program benefits your home may qualify for.
What Is the Mass Save Program and How Does It Work?
The Mass Save program is the statewide energy efficiency initiative for Massachusetts homeowners - funded by a small charge on every utility bill and administered by Eversource, National Grid, Cape Light Compact, Berkshire Gas, Liberty Utilities, and Unitil. Mass Save Massachusetts pays for a large share of qualifying home energy upgrades - heat pumps, insulation, air sealing, thermostats, and more - because helping you use less energy is cheaper for the utilities than building more power plants.
What the Mass Save program covers, at a glance:
- No-cost Mass Save Home Energy Assessment (the door to every rebate)
- Insulation and air sealing at 75–100% off eligible costs
- Heat pump and mini-split system rebates up to $8,500 standard, $16,000 income-eligible
- Heat pump water heater rebates ($750)
- Smart thermostat rebates ($100+, delivered at your assessment)
- 0% APR Mass Save HEAT Loan up to $25,000 for eligible upgrades
As a Mass Save® Participating Home Performance Contractor, Ecosave delivers the no-cost Home Energy Assessment that starts every eligible project, installs the qualifying weatherization measures, and files the rebate paperwork directly with your utility.
Start With a No-Cost Mass Save Home Energy Assessment
Everything in the Mass Save program starts with the energy audit mass save requires - the Home Energy Assessment. A certified specialist visits your home, inspects your insulation, air leaks, HVAC, and appliances, and hands you a written report that shows exactly where your home is losing energy and which upgrades qualify for mass save rebates. The visit costs nothing - you don't get billed, and the utility doesn't take it out later.
During the assessment you get:
- 90–120 minute inspection of insulation, air leaks, HVAC, and appliances
- Blower-door test to measure your home's actual air leakage
- No-cost items installed the same visit — LED bulbs, smart thermostat, low-flow showerheads
- Written report ranking every upgrade opportunity by potential savings
- Exact mass save rebates against each recommended measure
- The paperwork trail that opens every other Mass Save incentive and the 0% HEAT Loan
Mass Save Rebates & Energy Efficiency Incentives
Mass Save Massachusetts pays for a share of qualifying energy upgrades on a per-measure basis. Here are the biggest mass save rebates and energy efficiency rebates for a typical Massachusetts home. Amounts are set by the Mass Save® Sponsors and can change - we confirm your exact eligibility at the assessment.
| Rebate / Incentive | Amount | Best for |
|---|---|---|
| Whole-home heat pump | Up to $8,500 standard | Fossil fuel heat conversion |
| Enhanced income-eligible rebate | Up to $16,000 total | Income-qualified households |
| Insulation coverage | 75–100% of eligible costs | Attic, walls, basement, rim joist |
| Air sealing | Up to 100% covered | Whole-house air leak sealing |
| Heat pump water heater | $750 rebate | ENERGY STAR qualifying units |
| Smart thermostat | $100+ rebate | Delivered at your assessment |
Mass Save Income-Eligible Program & Enhanced Incentives
The Mass Save income eligible program runs a separate track for income-eligible households that raises rebate amounts significantly and often covers 100% of qualifying weatherization. Households at 60% or less of state median income typically qualify. If your household is close to that threshold, the assessment is worth booking on that basis alone - enhanced amounts can reach $16,000 on a heat pump project alone, and insulation is often fully covered.
- Enhanced heat pump rebates up to $16,000 (vs $8,500 standard)
- 100% insulation coverage on qualifying measures
- No-cost air sealing on qualifying homes
- Additional rebates on qualifying appliance upgrades
- Priority scheduling for eligible households
What Home Upgrades Can Mass Save Help With?
The Mass Save program covers the energy-saving parts of your home — the systems that heat, cool, insulate, and power daily use. Here's what qualifies under the residential Mass Save program:
Heating & Cooling
Cold-climate heat pumps, ducted or ductless mini splits, high-efficiency boilers and furnaces where qualifying, and smart thermostats.
Insulation & Air Sealing
Attic, wall, basement, and rim joist insulation plus blower-door-verified air sealing across the whole home.
Water Heating
Heat pump water heaters (ENERGY STAR certified) with $750 rebates on qualifying units.
Duct Improvements
Duct sealing and insulation for ducts running through attics, crawlspaces, or unconditioned basements.
Knob & Tube Removal
Removal of active knob and tube wiring when it's blocking eligible insulation upgrades.
Not covered
Solar (a separate Ecosave service outside Mass Save), EV chargers (utility rebate programs), gas cooking appliances, and general home renovations.
Frequently Asked Questions About Mass Save Program
Is Mass Save free?
The Mass Save Home Energy Assessment is fully paid for. Most Mass Save rebates cover 75–100% of qualifying weatherization measures. Larger equipment upgrades like heat pumps and water heaters are subsidized through rebates rather than fully covered, though income-eligible households can access enhanced amounts that bring the out-of-pocket cost close to zero.
Who is eligible for Mass Save?
Any Massachusetts resident who pays into one of the participating utilities is eligible for the Mass Save program — that includes Eversource, National Grid, Cape Light Compact, Berkshire Gas, Liberty Utilities, and Unitil customers. Renters can also request the assessment with landlord approval. Enhanced Mass Save income eligible program incentives require meeting Mass Save's income thresholds.
How do I sign up for Mass Save rebates?
The path is always the same: book the no-cost Mass Save Home Energy Assessment, receive the report identifying qualifying measures, complete the upgrades through a participating Mass Save contractor like Ecosave, and let us file the paperwork with your utility. You don't sign up separately — the assessment starts the process.
How much can I save with the Mass Save program?
It varies by home and household. A typical Massachusetts homeowner completing insulation, air sealing, and a heat pump conversion sees $6,000–$16,000 in combined Mass Save rebates plus significant annual utility savings — often 30–50% off previous heating and cooling costs.
Do I need a Mass Save contractor to get rebates?
For most measures, yes — the work needs to be performed by a Mass Save Participating Contractor like Ecosave for the rebates to flow. Some equipment rebates (like heat pump water heaters purchased retail) can be claimed independently, but a Participating Contractor makes the paperwork significantly easier.
How long does the Mass Save process take?
The assessment happens within 2–4 weeks of scheduling. From there, insulation and air sealing typically finish 4–6 weeks later; heat pump projects run 6–10 weeks depending on equipment and permits. Ecosave sequences your projects to keep the paperwork clean.
Can I use Mass Save for a new construction home?
The Mass Save program has a separate new construction program with different pathways. The residential Mass Save rebates on this page apply to existing homes. Ask us at the assessment if you're planning a major renovation or addition — we'll route you correctly.
Your Home Could Be Missing Out on Mass Save Savings
Find out which Mass Save rebates, energy-efficiency upgrades, and income-based incentives may be available for your Massachusetts home with a no-cost Home Energy Assessment.