Massachusetts has a lot of old, oil-heated housing stock, especially across the SouthCoast and South Shore, and Mass Save is the program built to push homeowners toward heat pumps instead. The rebates are real and often substantial, but the process trips people up because it has a specific order of operations, and doing a step out of order can cost you the rebate entirely. This is a walk-through of how the process actually works in 2026. We’re deliberately not throwing dollar figures at you here, because Mass Save’s rebate amounts and caps change, sometimes more than once a year, and a number that was right last spring can be wrong today. Check masssave.com for current figures, or ask us directly.
What Mass Save Actually Is
Mass Save is the statewide energy-efficiency program funded through Massachusetts utility customers and run in partnership with the state’s electric and gas utilities. It covers a lot of ground, insulation, weatherization, appliance rebates, but the heat pump piece is the one most homeowners are chasing right now, because it’s the single biggest incentive most people will ever see for a home HVAC project. We cover the broader program in our Mass Save overview if you want the full picture, and our Mass Save services page for how Armus fits into it.
Step 1: Book a Home Energy Assessment
This is the front door to almost every Mass Save incentive, including heat pumps, and it’s usually done at no cost. A Mass Save energy specialist comes out, looks at your insulation and air sealing, checks your existing heating and cooling equipment, and typically installs some no-cost measures on the spot like weatherstripping or a programmable thermostat. The assessment report becomes part of the record Mass Save references when you apply for a heat pump rebate later, so it’s worth scheduling this before you’ve already picked out equipment, not after.
Step 2: Understand Whole-Home vs. Partial-Home Pathways
This is the distinction that actually determines how big your rebate is, and it trips up more homeowners than anything else in the process.
Whole-home means the heat pump system is sized and installed to serve as the primary heating source for the entire house, actually displacing your oil, propane, or electric resistance system rather than just supplementing it. Because it does more of the real work of cutting fossil fuel use, it qualifies for the larger incentive tier.
Partial-home means the heat pump covers only part of the house, a single zone, an addition, a couple of rooms, while your existing furnace or boiler stays in place as the primary or backup heat source. It still qualifies for an incentive, just a smaller one, because less of your home’s heating load actually shifts off fossil fuel.
Decide which pathway you’re actually going for before you get quotes, because it changes how the system should be sized and which equipment configuration makes sense.
Step 3: Use a Mass Save Participating Contractor
Rebates are processed through contractors enrolled in Mass Save’s Heat Pump Installer Network. In most cases, the project needs pre-approval before installation starts, not after, so if a contractor tells you to go ahead and install first and worry about the paperwork later, that’s a red flag. Ask any contractor you’re getting quotes from, upfront, whether they’re enrolled and who actually submits the rebate paperwork on your behalf (our guide to finding a Mass Save heat pump contractor covers what to ask). That answer affects your timeline and whether the rebate comes off the price at the time of installation or arrives later as a reimbursement.
When you book a site visit with Armus, we’ll tell you plainly where your specific project stands on Mass Save eligibility, what we handle for you, and what you’ll need to submit yourself, before any equipment gets ordered.
Step 4: Income-Eligible Enhanced Incentives
Households under certain income thresholds can qualify for a meaningfully higher incentive tier than the standard rebate, and in some qualifying cases the out-of-pocket cost drops close to nothing for eligible equipment. Eligibility is based on household size and income and gets checked as part of the application process, generally at or after your home energy assessment. Current income limits and how to apply change periodically, so we point homeowners to masssave.com or the assessment team directly rather than guessing at a threshold.
Step 5: The HEAT Loan
The Mass Save HEAT Loan is 0% interest financing intended to cover your share of the project cost after any rebate is applied, arranged through a network of participating local lenders rather than through your contractor directly. It’s not free money, it’s an interest-free loan, and it’s meant to spread the after-rebate cost out over time instead of writing one large check. Maximum loan amounts and repayment terms vary depending on your income tier and change from time to time, so ask a participating lender or your contractor for the current terms before you build a budget around a specific number.
What Actually Changes Your Rebate Amount
A few things move the number more than anything else: whether the project is whole-home or partial-home, what fuel the heat pump is actually displacing (oil and propane systems typically see the strongest incentive to switch), the size and type of equipment, whether it’s a ducted system or a ductless mini-split, and whether the specific equipment model is listed on Mass Save’s Qualified Product List. Equipment that isn’t QPL-listed generally doesn’t qualify at all, regardless of how efficient it is, so this is one of the first things we check before we ever build a proposal.
A Realistic Timeline
Energy assessment first. Then a proposal from your contractor that specifies the actual equipment and pathway. Then pre-approval submitted to Mass Save before anything gets installed, this step matters and skipping it can jeopardize the rebate entirely. Then the installation itself. Depending on the project, there may be a verification step afterward. The rebate is then issued either at the point of sale or as a check once paperwork clears. The program runs on a calendar year with a rebate-submission deadline that typically falls early in the following year, so if you want a rebate to land in a particular program year, don’t wait until December to get started.
How Armus Helps With All of This
We do heat pump installs across the SouthCoast, South Shore, Cape Cod, and Rhode Island every week, and we’d rather give you a straight answer on your site visit than a sales pitch. That means telling you honestly whether whole-home or partial-home fits your house and budget, which cold-climate equipment is actually QPL-eligible for your project, and what the realistic next steps look like. We answer the phone 24/7, seven days a week, no answering machine.
Frequently Asked Questions
Do I have to get the free home energy assessment before I can get a heat pump rebate?
In almost every case, yes. The assessment is the standard entry point into Mass Save’s programs, and its findings become part of the record referenced when you apply for a heat pump rebate, so it’s worth scheduling early rather than after you’ve already picked equipment.
What’s the real difference between whole-home and partial-home heat pump rebates?
Whole-home means the heat pump is sized and installed to be the primary heating system for the entire house, displacing your existing fossil fuel system rather than just supplementing it, which is why it qualifies for the larger incentive tier. Partial-home means the heat pump covers part of the house, like one zone or an addition, while your existing furnace or boiler stays in place as the primary or backup heat, which qualifies for a smaller tier.
Are ductless mini-splits eligible for the same rebates as ducted heat pumps?
Both categories can qualify, as long as the specific equipment is on Mass Save’s Qualified Product List and the installation meets program requirements. Ductless mini-splits and ducted, central heat pump systems are evaluated under the same whole-home and partial-home framework.
How do I know if I qualify for income-eligible incentives?
Eligibility is based on household size and income, checked as part of the application process, and it can unlock a meaningfully higher incentive tier than the standard rebate. Current income limits and how to apply are posted at masssave.com, and we can help point you in the right direction during your site visit.
Does the HEAT Loan cover the whole cost of the project?
The HEAT Loan is 0% interest financing meant to cover your share of the cost after any rebate is applied, not the rebate itself. Maximum loan amounts and repayment terms are set by the program and vary by income tier, so ask your contractor or a participating lender for current numbers before you count on a specific figure.