How to Get Mass Save Rebates: Complete Guide for Homeowners
Mass Save is the best-kept secret in Massachusetts homeownership — except it’s not a secret, most people just don’t bother applying. The program covers 75–100% of insulation costs, offers up to $10,000 in heat pump rebates, and provides 0% financing for energy improvements. It’s funded by utility ratepayers, so if you pay a gas or electric bill in Massachusetts, you’re already paying into it. The question isn’t whether to use Mass Save. The question is why you haven’t already. Here’s how to get every dollar available.
What Mass Save Offers
| Rebate/Service | Amount | Eligibility | How to Get It |
|---|---|---|---|
| Home Energy Assessment | Free | All MA residents with utility account | Schedule online or call 866-527-7283 |
| Insulation (attic, walls, basement) | 75% of cost (100% income-eligible) | Identified in assessment | Assessment first, then approved contractor |
| Air Sealing | 100% of cost | Identified in assessment | Included with insulation work |
| Heat Pump (whole-home) | Up to $10,000 | Replacing primary heating system | Pre-approval required before installation |
| Heat Pump (supplemental) | $1,250–$1,500 per unit | Adding to existing heating | Pre-approval required |
| Heat Pump Water Heater | $750 | Replacing electric or oil water heater | Purchase qualifying model, submit rebate |
| Smart Thermostat | $100 | Any qualifying thermostat | Online rebate form after purchase |
| Wi-Fi-Enabled Heat Pump Thermostat | $25 | For mini-split heat pumps | Submit rebate after installation |
| Appliance Recycling | $75 per unit | Working fridge/freezer to recycle | Schedule free pickup |
| LED Bulbs | Free (during assessment) | All assessed homes | Technician installs during visit |
| HEAT Loan | 0% interest, up to $25,000 | For qualified energy improvements | Apply through Mass Save lender |
Step 1: Schedule the Home Energy Assessment
Everything starts with the free assessment. A certified technician visits your home for 2–3 hours and evaluates:
- Insulation levels in attic, walls, and basement
- Air leakage (using a blower door test)
- Heating and cooling system efficiency
- Lighting and appliance efficiency
- Hot water system
During the assessment, the technician installs free energy-saving measures on the spot: LED bulbs, smart power strips, low-flow showerheads, and faucet aerators. These freebies alone are worth $50–$100.
Schedule at masssave.com or call 866-527-7283. Wait times are typically 4–8 weeks, so schedule well before winter.
Step 2: Review the Assessment Report
Within a week, you’ll receive a detailed report with recommendations and estimated savings. Typical findings for an older Massachusetts home:
| Improvement | Estimated Cost | Mass Save Pays | Your Cost | Annual Savings | Payback Period |
|---|---|---|---|---|---|
| Attic insulation (R-11 to R-38) | $2,500 | $1,875 (75%) | $625 | $400–$600 | 1–2 years |
| Wall insulation (blown-in) | $3,500 | $2,625 (75%) | $875 | $300–$500 | 2–3 years |
| Basement/rim joist insulation | $1,500 | $1,125 (75%) | $375 | $200–$350 | 1–2 years |
| Air sealing | $1,000 | $1,000 (100%) | $0 | $150–$300 | Immediate |
| Total | $8,500 | $6,625 | $1,875 | $1,050–$1,750 | 1–2 years |
Income-eligible households (under 60% of state median income) get 100% coverage — zero out of pocket. Even at 75% coverage, the payback period is remarkably fast.
Step 3: Get the Work Done
Mass Save uses a network of approved insulation contractors. You don’t choose a random contractor — Mass Save assigns or recommends from their qualified pool. The process:
- Accept the assessment recommendations
- Mass Save schedules the approved contractor
- Contractor performs the work (typically 1–2 days for insulation and air sealing)
- You pay only your share (25% for standard, 0% for income-eligible)
- Mass Save verifies the work through a post-installation inspection
Step 4: Apply for Heat Pump Rebates
If you’re considering a heat pump (and you should), Mass Save offers substantial rebates that stack with federal tax credits:
| Heat Pump Type | Total Cost | Mass Save Rebate | Federal Tax Credit (30%) | Your Net Cost |
|---|---|---|---|---|
| Single mini-split | $4,500 | $1,250 | $975 | $2,275 |
| Multi-zone mini-split (3 heads) | $15,000 | $3,750 | $2,000 | $9,250 |
| Whole-home ducted | $22,000 | $10,000 | $2,000 | $10,000 |
| Ground-source (geothermal) | $40,000 | Varies | $12,000 (30%, no cap) | $20,000–$25,000 |
Important: You must get pre-approval from Mass Save before installing a heat pump. Retroactive rebates are not available. Use our renovation ROI calculator to model the long-term savings.
Step 5: Use the HEAT Loan for Remaining Costs
The HEAT Loan offers 0% interest financing for up to $25,000 in qualifying energy improvements. Terms up to 7 years. No fees. This covers your out-of-pocket share of insulation plus any heat pump costs not covered by rebates.
Qualifying improvements:
- Insulation (your 25% share)
- Heat pumps (net cost after rebates)
- High-efficiency boilers and furnaces
- Water heaters
- Windows and doors (limited)
- Thermostats and controls
Stacking Mass Save with Federal Tax Credits
The Inflation Reduction Act (IRA) provides additional tax credits that stack on top of Mass Save rebates:
- Heat pumps: 30% credit up to $2,000/year (IRA 25C)
- Insulation: 30% credit up to $1,200/year (IRA 25C)
- Windows: 30% credit up to $600/year (IRA 25C)
- Electric panel upgrade: 30% credit up to $600 (IRA 25C)
- Geothermal: 30% credit, no cap (IRA 25D)
On a $22,000 whole-home heat pump, you can get $10,000 from Mass Save + $2,000 federal credit = $12,000 in incentives. Your net cost: $10,000, financed at 0% through the HEAT Loan. The annual energy savings of $1,500–$2,000 make the system cash-flow positive from year one.
Tips for Maximizing Mass Save Benefits
- Schedule the assessment early. Fall appointments fill fast. Book in August or September for a pre-winter assessment.
- Do insulation before equipment upgrades. A well-insulated home needs a smaller (cheaper) heating system. Insulate first, then size your heat pump correctly.
- Check income eligibility. Households earning under 60% of state median income ($63,000 for a family of 4 in most areas) qualify for 100% coverage on insulation — zero cost.
- Combine Mass Save + federal credits + HEAT Loan. The triple stack reduces costs by 50–80% on most energy improvements. This is the single best financial deal in Massachusetts homeownership.
- Get the assessment even if you rent. Renters in 1–4 unit buildings can request a Mass Save assessment. The landlord must agree to the work, but the assessment itself is free and informative.
Use our home maintenance calculator to project annual energy costs before and after improvements, and our mortgage payment estimator to see how lower utility bills affect your total housing budget.
Compare With Other States
Energy programs in other states?
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Frequently Asked Questions
Is Mass Save really free?
The assessment is free. Insulation and air sealing are 75% covered (100% for income-eligible households). You pay the remaining 25% out of pocket or through the 0% HEAT Loan. LED bulbs, smart power strips, and showerheads installed during the assessment are completely free.
How long does the Mass Save process take?
Assessment scheduling: 4–8 weeks out. Assessment itself: 2–3 hours. Report delivery: 1 week. Insulation scheduling: 2–4 weeks after accepting recommendations. Insulation work: 1–2 days. Total from first call to finished work: 8–14 weeks.
Can I use Mass Save if I just bought a home?
Yes. Schedule the assessment as soon as you close. New homeowners benefit the most because they can address insulation gaps before their first winter. Many buyers schedule the assessment during the closing process so work can begin shortly after move-in.
Does Mass Save cover heat pump installation?
Yes — up to $10,000 for whole-home heat pump systems and $1,250–$1,500 per supplemental mini-split unit. Pre-approval is required before installation. The rebate applies to air-source heat pumps; ground-source (geothermal) has separate incentives. Stack with the federal 30% tax credit for maximum savings.
What is the HEAT Loan?
The HEAT Loan is a 0% interest loan for up to $25,000 (up to 7-year terms) for qualifying energy improvements. It’s administered through participating Massachusetts lenders. You can use it to finance your share of insulation costs, heat pump installations, high-efficiency boilers, and other improvements identified in your Mass Save assessment.
Can renters use Mass Save?
Renters in 1–4 unit buildings can request a Mass Save assessment with their landlord’s cooperation. The landlord benefits from reduced energy costs and improved property value. In buildings where the landlord pays heat, they have a direct financial incentive to participate. The assessment is free regardless of who requests it. Use our how much rent you can afford to factor energy costs into your rental budget.
Compare options: Pre-Qualification vs Pre-Approval Compared