Mass Save® Heat Pump Rebates in Massachusetts, Explained Honestly
Up to $10,000 in Mass Save® rebates and a 0% HEAT Loan are real — but they come with an order of operations, a weatherization requirement, and one exception that catches a lot of MetroWest homeowners by surprise. Here's exactly how the money works before you sign anything.
What you can actually claim
Replacing your entire heating system with cold-climate heat pumps — and removing or fully decommissioning the old fossil-fuel system — unlocks the largest Mass Save® rebate tier. The home must clear a weatherization requirement first, which is why the no-cost Home Energy Assessment comes before the install, not after.
Keeping your existing furnace or boiler as backup still qualifies, at a lower per-ton rate. This is the practical path for many older MetroWest homes where the electrical panel or the room-by-room load doesn't yet support a full changeover.
Massachusetts homeowners with an eligible utility account can finance qualifying equipment at zero interest for up to seven years. It's issued through participating banks after your Home Energy Assessment, and it stacks on top of the rebate.
Insulation and air sealing are typically covered at 75–100% for eligible homes. It's also the step most people skip — and the reason their new heat pump gets sized larger and costs more than it needed to.
Qualifying cold-climate heat pumps carry a federal tax credit separate from Mass Save®. We hand you the AHRI documentation and model numbers your accountant will ask for.
Connected thermostat rebates are small but easy. Correct controls matter more on a heat pump than on a furnace — deep setback strategies that saved money on gas can cost money on a heat pump.
Program amounts and requirements are set by Mass Save® and its sponsoring utilities and change year to year. We confirm current figures against your utility account before they appear on your proposal.
The order of operations that protects your rebate
1. Book the no-cost Home Energy Assessment
Mass Save® sends an energy specialist to your home. Nothing you install before this visit counts toward the top rebate tiers, so this is genuinely step one — not paperwork you can backfill later.
2. Clear the weatherization requirement
The assessment produces an insulation and air-sealing scope. Completing it (usually at 75–100% subsidy) is what makes the whole-home heat pump rebate available — and it shrinks the system you need to buy.
3. Get a load calculation and a written proposal
We measure the house, not the old equipment's nameplate, and specify cold-climate equipment that meets the program's efficiency requirements. You get itemized pricing with the rebate and any electrical work shown separately.
4. Apply for the rebate and, if you want it, the HEAT Loan
We handle the installation-side documentation: AHRI certificates, model and serial numbers, invoice formatting, and the decommissioning evidence the program asks for.
5. Install, inspect, get paid
After a permitted, inspected installation we submit the package. Rebate checks typically arrive within several weeks; HEAT Loan funds are handled by the participating bank.
The municipal light plant exception
Mass Save® is funded by a charge on the bills of Eversource, National Grid and the other sponsoring utilities' customers. Towns served by their own municipal light plant — including Wellesley and Concord among the communities we serve — don't pay into that charge, so their residents generally aren't eligible for Mass Save® rebates or the 0% HEAT Loan.
Those light plants run their own heat pump incentive programs. The dollar amounts are usually smaller, but the process is faster and less paperwork-heavy, and local electricity rates are often lower — which shifts the operating-cost math in the heat pump's favor. The expensive mistake is budgeting a project around a $10,000 rebate that was never going to arrive. We check which utility bills your address before we put a number on paper.
Rebate questions we get every week
Who is eligible for Mass Save® rebates?+
Residential customers of the sponsoring utilities — Eversource, National Grid, Berkshire Gas, Cape Light Compact, Liberty and Unitil — fund Mass Save® through a charge on their bill and are eligible for its programs. Eligibility follows your utility account, not your town's name, so it's worth confirming before you plan a budget around a specific rebate number.
Why don't Wellesley and Concord homeowners get the same Mass Save® rebates?+
Both towns are served by municipal light plants — Wellesley Municipal Light Plant and Concord Municipal Light Plant — rather than an investor-owned utility. Municipal light plant customers don't pay into the Mass Save® energy efficiency charge, so they generally aren't eligible for Mass Save® rebates or the HEAT Loan. Those towns run their own local incentive programs instead, usually smaller but much easier to process. We price those projects against the local program, never against a Mass Save® number that wouldn't arrive.
Can I get the rebate if I keep my furnace or boiler?+
Yes, at the lower per-ton partial-displacement rate. The full whole-home tier requires the fossil-fuel system to be removed or permanently decommissioned. For a lot of older homes we install in stages: heat pumps now at the partial rate, full changeover once the panel and the envelope are ready.
Does the rebate come off my invoice or arrive later?+
Mass Save® heat pump rebates are paid to the homeowner after the installation is documented and approved, so you pay the installed price first and receive the rebate afterward. Anyone promising an instant discount labeled as a rebate is quoting you something else.
Do I need a Home Energy Assessment before installing?+
For the whole-home heat pump rebate, yes — the weatherization requirement is verified against that assessment. Skipping it is the single most common reason homeowners lose several thousand dollars they assumed was automatic.
Does electrical panel work qualify?+
The rebate covers qualifying heat pump equipment, not the service upgrade. Plenty of homes in Newton, Lexington and Needham still run 100-amp service, and a panel or service upgrade is a real line item. We quote it upfront instead of discovering it on installation day.
Can the HEAT Loan be combined with the rebate?+
Yes. The 0% HEAT Loan and the rebate are separate programs and are routinely used together — finance the project at zero interest, then apply the rebate against the balance when it arrives.
Do you handle the Mass Save® paperwork?+
We install to the program's equipment and documentation standards and handle the installer-side paperwork for eligible customers. What we won't do is quote a rebate figure before confirming your utility, your home's weatherization status, and the equipment that actually fits the house.
Rebate-eligible installations near you
Town-by-town detail on housing stock, electrical capacity and which incentive program applies.
Find out what you actually qualify for
Tell us your address and we'll confirm your utility, your eligible programs and a real installed price — free, and without a rebate number we can't back up.