Mass Save heat pump rebates, town by town

For a whole-home system installed in 2026, Mass Save pays $2,650 per ton, up to $8,500. A partial-home system, where you keep a boiler or furnace, pays $1,125 per ton, up to $8,500. Basic rebates, for homes not replacing fossil or electric resistance heat, pay $250 per ton, up to $2,500.

Yes. Mass Save's page says that for whole-home projects installed on or after January 1, 2027, the rebate drops to $2,350 per ton, capped at $7,500. Partial-home drops to $1,000 per ton, capped at $7,500. Mass Save had not published 2027 numbers for basic rebates or the income-based incentives when we checked.

The heat pump has to be installed between January 1 and December 31, 2026. The rebate form and paperwork must reach Mass Save by February 28, 2027. Mass Save asks for about eight weeks to process.

Mass Save words both rates by installation date: installed between January 1, 2026 and December 31, 2026, or installed on or after January 1, 2027. Get your installer to commit to an install date in writing, and call Mass Save at 1-888-855-0340 if your project straddles the new year.

Mass Save is run by Eversource, National Grid, Unitil and Cape Light Compact for electricity, and several gas companies. Your electric bill shows who delivers your power. In this guide, Boston, Cambridge, Somerville, Arlington, Watertown, Waltham, Woburn, Winchester, Lexington and Stoneham are Eversource electric. Melrose, Malden, Everett, Revere, Lynn, Salem and Beverly are National Grid electric. Medford is on both utility lists, so check your bill.

Not for electric. Towns served by their own light plant, such as Belmont, Reading, Wakefield, Peabody and Danvers, run their own heat pump rebates with their own amounts. A gas-heated home in one of those towns may still use the Mass Save gas side. Belmont Light says so on its own page. See the municipal guide.

Yes. Mass Save says the system must be installed by a contractor participating in the Mass Save Heat Pump Installer Network. Check any contractor against that list before you sign.

The home has to be sufficiently weatherized. Mass Save accepts any one of three tests: the home was built in 2000 or later, a Home Energy Assessment recommends less than $1,000 of weatherization, or recommendations made in 2013 or later have been completed. A home that fails can still get the partial-home amount.

The federal Energy Efficient Home Improvement Credit (25C) covered improvements made through December 31, 2025, according to the IRS. A heat pump installed in 2026 does not qualify for it. Mass Save and utility rebates are separate and still run.

A 0% financing loan from the Mass Save sponsors, up to $25,000 for qualified home improvements, including heat pumps. See the income-eligible and HEAT Loan guide.

Mass Save says to allow eight weeks for processing. Some projects are chosen for a random inspection, and the rebate waits until you schedule it.

Square feet alone does not tell you. A tight 2,000 square foot home and a drafty one need different sizes, and the right size comes from a room-by-room heating load calculation (ACCA Manual J, the method Mass Save names for its sizing bonus). For the rebate, Mass Save counts tons as the AHRI cooling capacity divided by 12,000 BTU, and a whole-home system reaches the cap at about 3.2 tons (about 38,500 BTU per hour). The size page turns the BTU on a quote into tons and a rebate.

No. Installations that replace an existing heat pump with a new heat pump are not eligible for the partial-home or whole-home rebate, according to Mass Save. You may be eligible for the basic heat pump rebate. Mass Save suggests a no-cost decarbonization consultation or a word with your installer before you start.

Whole-home and partial-home rebates need a residence occupied full time in winter. Mass Save lists a heat pump in a home not occupied in winter, and a heat pump in a previously unconditioned space such as a new addition, as basic rebate cases: $250 per ton, up to $2,500.

A $500 bonus on partial-home projects when the heat pumps are sized to meet the home's total heating needs: 90 to 120% of the heating load at the outdoor design temperature per ACCA Manual J, with a copy of the load calculation sent with the application.

Mass Save says municipal electric customers can take the HEAT Loan if their home is heated with natural gas provided by a Mass Save sponsor. Customers with municipal gas heating are not eligible.

Mass Save's own example uses an average installation cost of $22,000, from program data on whole-home installs finished in 2022. At the 2026 cap that leaves $13,500. Your quote decides the real number.