Massachusetts Home Energy Rebates 2026: Mass Save, Light Plant Towns, and What the Federal Cuts Took

Massachusetts Home Energy Rebates 2026: Mass Save, Light Plant Towns, and What the Federal Cuts Took

The Short Answer

For a heat pump installed in Massachusetts in 2026, Mass Save pays $2,650 per ton, up to $8,500, when it heats the whole home, $1,125 per ton, up to $8,500, for a partial-home system, and $250 per ton, up to $2,500, for a basic install. Income-based enhanced rebates reach $16,000, or a no-cost install through Mass Save's turnkey service. The 0% HEAT Loan finances up to $25,000. Those figures were read on Mass Save's program page on November 13, 2026.

Three things are missing compared with a year ago. The federal 25C credit, worth 30% up to $2,000 for a heat pump, ended for property placed in service after December 31, 2025, as did the 25D credit for geothermal and solar. The state's federally funded HEAR and HER rebates, $146 million between them, still had not launched. And Mass Save itself has a deadline: install by December 31, 2026, because whole-home rebates change for projects installed from January 1, 2027.

Which Program Serves Your Address

Massachusetts has two kinds of electric utility, and the difference decides which rebates you can use.

Mass Save towns. Most of the state buys electricity from Eversource, National Grid, Unitil, or, on Cape Cod and Martha's Vineyard, through the Cape Light Compact. These are Mass Save's electric sponsors. Mass Save is not a government agency; it is the program those utilities run under the state's three-year energy efficiency plans, paid for through a charge on every customer's bill. Its heat pump offers for homes replacing oil, propane or electric resistance heat are valid only where one of those four is the electric sponsor.

Municipal light plant towns. The DOER counts 40 communities whose electricity comes from a municipal light plant (MLP) and that are not served by Mass Save's electric programs. Belmont, Concord and Reading are familiar examples. In these towns the light plant sets its own heat pump and efficiency offers, and they vary widely. A household in an MLP town may still get Mass Save weatherization help through a gas sponsor if it heats with utility gas, but not Mass Save's electric heat pump rebates. Mass Save adds one more wrinkle: customers who heat with municipal gas are ineligible for the basic heat pump rebate unless their electricity comes from a Mass Save sponsor.

Gas sponsors. For a home replacing natural gas heat, the relevant sponsor is the gas utility: Berkshire Gas, Eversource, Liberty, National Grid or Unitil.

Check your electric bill first. The name at the top tells you which half of this guide applies.

The Stacking Table

This is the table to keep. Each row is a program a Massachusetts homeowner might be told about in late 2026, with what it pays, who runs it, whether approval is needed before work starts, what it combines with, and its status on November 13, 2026.

Three stacking rules come from Mass Save's own page:

1. One account, one $8,500 ceiling. Basic and whole- or partial-home rebates combined are capped at $8,500 per account. You cannot take a whole-home rebate on one system and a basic rebate on another to get past it.
2. Enhanced replaces standard. An income-qualified household gets the enhanced amount instead of the standard one, not on top of it.
3. Rebates and the HEAT Loan stack. The loan finances what the rebate does not cover, and it is designed to sit alongside the rebates.

Mass Save Heat Pump Rebates in Detail

Whole-home. $2,650 per ton up to $8,500. A ton is the system's AHRI-rated cooling capacity divided by 12,000 BTU per hour, so the rebate follows the equipment's certificate, not the contractor's description. The arithmetic:

The cap arrives at about 3.21 tons ($8,500 divided by $2,650). For most single-family homes in the state, that makes the whole-home rebate a flat $8,500 for any system above about 3.2 tons, and adding tonnage earns nothing more.

The whole-home rebate has a prerequisite: the home must be sufficiently weatherized before the heat pump goes in. Mass Save accepts two proofs. Either the home was built in 2000 or later, or a Home Energy Assessment recommends less than $1,000 of weatherization. An older house that needs more than that must do the weatherization first. Mass Save's 2026 page also says whole-home rebates change for projects installed on or after January 1, 2027, without giving the new amounts on that page; a homeowner with a signed contract in late 2026 should get an install date in writing.

Partial-home. $1,125 per ton up to $8,500, plus a $500 weatherization bonus and a $500 sizing bonus where the conditions are met. The fuel source being displaced must be removed or disconnected by the installer and noted on the invoice.

Basic. $250 per ton up to $2,500, for an install that keeps the existing system without the partial-home conditions. It is the smallest offer and the one most quotes should try to beat.

Enhanced, income-based. Up to $16,000 per heat pump project, or up to no cost through Mass Save's turnkey service. The enhanced offers use income tiers measured against state median income. DOER's page describes the bands used for the planned HEAR delivery: at or below 60% of state median income for income-eligible households and 61% to 80% for moderate-income households. Confirm your tier on Mass Save's income-based offers page, which lists the dollar limits by household size.

The full rebate history is on our Mass Save heat pump rebates program record.

Weatherization: The Step That Opens the Big Rebate

Every Mass Save customer can book a no-cost Home Energy Assessment. The assessor checks insulation and air leakage and writes up recommended work. Mass Save's insulation page, read November 13, 2026, offers 75% to 100% off approved insulation and air sealing in 1- to 4-unit homes. Income-eligible residents get the work at no cost, and residents of Mass Save's designated equity communities qualify for 100% off weatherization. Mass Save lists no dollar cap on those percentages.

The reason to do this first is the whole-home rule above. A pre-2000 house whose assessment recommends more than $1,000 of weatherization cannot collect the whole-home heat pump rebate until that weatherization is done. So the order is fixed: assessment, weatherization, then heat pump. The weatherization also cuts the heat load, which can shrink the heat pump by half a ton or more. Our insulation payback guide shows the effect, and the air sealing guide for old homes covers what the crew should be doing.

Keep the assessment report, the weatherization invoice and the completion paperwork together; they are part of the evidence for the heat pump rebate. Our audit and rebate documentation checklist lists what to save.

The HEAT Loan

The HEAT Loan is a 0% loan for qualified energy improvements, up to $25,000 on Mass Save's current page. It comes through participating lenders, so the loan approval and the lender's paperwork need to be in place before the work starts. Because the rate is zero, the loan does not change the payback arithmetic; it only spreads the cash. On a $25,000 loan repaid over seven years, the monthly payment would be about $298, before any lender terms that differ.

What the Federal Changes Took Away

The 25C and 25D tax credits. Through 2025, a Massachusetts homeowner installing a qualifying heat pump could claim 30% of the cost, up to $2,000, under Section 25C, and 25C also paid up to $1,200 a year on insulation, windows and other envelope work. Section 25D paid 30% of geothermal heat pumps, solar and batteries with no annual cap. Both ended for property placed in service after December 31, 2025. A quote that still lists a "federal tax credit" on a 2026 install is wrong. Our 25C vs 25D guide has the history and the transition rules.

HEAR and HER. Massachusetts was allocated $72,809,130 for Home Electrification and Appliance Rebates (HEAR) and $73,086,125 for Home Efficiency Rebates (HER). DOER planned to deliver HEAR through Mass Save's income-eligible and moderate-income offers, and to use HER for the 40 municipal light plant communities and for affordable deed-restricted multifamily housing. On November 13, 2026, DOER's federal funding page still described the programs as awaiting U.S. Department of Energy approval of the State Implementation Blueprint, with no launch date. Its earlier expectation of a 2025 launch has passed. Until DOER announces otherwise, count neither in a budget. Our HEEHRA income limits guide explains how the federal income tests would apply once a state launches, and the HOMES program record covers the whole-home side.

MassCEC. The Massachusetts Clean Energy Center funds market-building programs rather than paying households directly. Its EmPower Massachusetts grants go to community organizations, not homeowners, and the FY26 round closed March 26, 2026 with no new round announced on its page; see our EmPower Massachusetts record. Homeowners looking for a heat pump rebate should start with Mass Save or their light plant.

Running Costs: When a Heat Pump Beats Oil in Massachusetts

Massachusetts electricity is expensive by national standards, which makes the oil comparison closer than in most states. Electricity prices differ by utility, by supply option and by month, so the tables below use a range. Read your own bill: divide the total charge for delivery plus supply by the kWh used to get your all-in rate.

Heat pump. Heat costs the all-in rate divided by the seasonal coefficient of performance (COP). COP is an assumption here; cold-climate units in Massachusetts commonly land between 2 and 3 across a season. Our cold-climate performance data shows why it falls on the coldest days.

Oil. A gallon of heating oil holds about 138,500 BTU (EIA). At an assumed 80% seasonal efficiency for an older boiler or furnace, that is about 110,800 BTU of delivered heat, or 32.5 kWh. So oil heat costs the price per gallon divided by 32.5.

Break-even oil prices. Multiply the heat pump's cost per kWh of heat by 32.5:

Read that table carefully. At 30 cents a kWh, a heat pump averaging a COP of 2.5 only beats oil when oil costs more than about $3.90 a gallon. The savings case in Massachusetts depends on getting a high seasonal COP, which comes from a properly sized cold-climate system in a weatherized house, and on the rate you pay. Against electric baseboard the case is simple: resistance heat costs the full rate per kWh, so any heat pump cuts it by its COP. Against propane, run the same division with your propane price and efficiency; it is often the more expensive fuel per unit of heat. Our heat pump vs gas furnace operating cost page covers the gas comparison.

Worked Example 1: An Oil-Heated Colonial in Worcester

These households are hypothetical. Rebate rates come from Mass Save's page as read on November 13, 2026; the quotes, oil use, rates and COP are labelled assumptions.

The house. A 1950s 2,000 square foot colonial, National Grid electric, oil boiler. It burns an assumed 850 gallons a year. The Home Energy Assessment recommends $4,500 of attic insulation and air sealing, which is more than $1,000, so weatherization comes first.

The plan. Weatherize, then install a 3.5-ton ducted cold-climate heat pump as the whole-home system, with the boiler decommissioned. Assumed quote: $21,000 including electrical work.

Household A: standard incentives.

The 75% figure is the low end of Mass Save's 75% to 100% range; your assessment report will show the actual incentive. In 2025 the same project would also have earned up to $2,000 from 25C on the heat pump and 30% of the $1,125 insulation share, about $340, so roughly $2,340 is what the federal change cost this household.

Household B: income-based enhanced offers. Same house, assuming the household's income tier earns the full $16,000 maximum and 100% off weatherization; lower tiers get less, so confirm yours with Mass Save.

Running cost. 850 gallons times 32.5 kWh is about 27,600 kWh of heat; weatherization cuts that by an assumed 15%, to 23,500 kWh. At a COP of 2.7 the heat pump uses about 8,700 kWh. At an all-in 30 cents that is $2,610 a year. The oil bill before weatherization, at an assumed $3.75 a gallon, was $3,188. The saving is about $580 a year against the old oil bill, and much of it comes from the weatherization; part of the remaining value is central air conditioning the house did not have.

What that means. For Household A, the heat pump does not pay back on fuel savings alone at these assumptions; it is a comfort, cooling and decarbonization purchase financed at 0%. For Household B, $5,000 against about $580 a year is under 9 years, and better if oil prices rise. If your all-in rate is 25 cents, the heat pump's running cost falls to about $2,175 and the saving nearly doubles, to about $1,010. Run the numbers on your own bill before signing.

Worked Example 2: An Electric Baseboard Ranch on the South Shore

The house. A 1,300 square foot 1990s ranch, Eversource electric, heated by baseboards. Space heating uses an assumed 11,000 kWh a year. The assessment recommends $800 of weatherization, under the $1,000 line, so the whole-home rebate is available without waiting.

The plan. A 2.5-ton multi-zone ductless system with heads in each main room, set up as the primary heat, with the baseboards disconnected from the heated zones (the partial-home offer requires the displaced fuel source to be disconnected; ask Mass Save what the whole-home offer requires for baseboards). Assumed quote: $15,500.

Running cost. Baseboards turn 11,000 kWh into 11,000 kWh of heat. A heat pump at a COP of 2.5 uses 4,400 kWh for the same heat. The 6,600 kWh saved is worth $1,980 a year at 30 cents. Payback: $8,875 divided by $1,980 is about 4.5 years, and the house gains air conditioning.

The light plant version. Put the same ranch in a municipal light plant town and the Mass Save electric rebate line becomes zero. The homeowner's rebate is whatever the light plant offers, and some light plants charge less per kWh than the investor-owned utilities, which would shorten payback even without a rebate. Compare your light plant's rate with the 30 cents used here. Call the light plant before getting quotes.

Order of Operations

1. Read your electric bill. Eversource, National Grid, Unitil or Cape Light Compact means Mass Save. A town light plant means your light plant's offers.
2. Check the income tier on Mass Save's income-based offers page before booking anything. An enhanced or turnkey offer changes the whole plan.
3. Book the free Home Energy Assessment.
4. Do the recommended weatherization if it is $1,000 or more and the house was built before 2000.
5. Apply for the HEAT Loan before work starts if you will finance.
6. Get quotes from contractors who will size the system by load calculation and state the AHRI tonnage. Our quote comparison worksheet keeps them on the same basis, and the sizing guide explains what a load calculation should show.
7. Install by December 31, 2026 if you want the 2026 whole-home rate, and send the rebate form and documents so they are received by February 28, 2027.

Edge Cases

Keeping the oil boiler as backup. Whole-home status depends on the heat pump being the home's heating system; a homeowner who wants to keep the boiler running for the coldest days should ask whether that drops the project to the partial-home or basic offer. Our backup heat guide covers how the controls work.

A 4-ton quote. The rebate stops rising at 3.21 tons. If a contractor proposes 4 tons, ask for the load calculation; an oversized system costs more, cycles more and earns the same $8,500.

Installed on January 2, 2027. Mass Save's page says whole-home rebates change for installs on or after January 1, 2027. Do not assume the 2026 amount carries over.

Gas-heated homes. The gas sponsor runs the offer, and Mass Save's gas-replacement rebates apply when Berkshire Gas, Eversource, Liberty, National Grid or Unitil is the gas sponsor. Our heat pump vs gas furnace cost comparison prices that switch.

Panel capacity. Older 100-amp services often need work before a whole-home heat pump. The HEAT Loan can finance qualified improvements; the panel itself is priced in our electrical panel upgrade cost guide.

Frequently Asked Questions

How much is the Mass Save heat pump rebate in 2026?

$2,650 per ton up to $8,500 for a whole-home system, $1,125 per ton up to $8,500 for a partial-home system, and $250 per ton up to $2,500 for a basic install. Income-based enhanced rebates reach $16,000, or no cost through turnkey service. Equipment must be installed in 2026, with the rebate form received by February 28, 2027 (Mass Save, read November 13, 2026).

Is the federal heat pump tax credit still available in Massachusetts?

No. Section 25C, which paid 30% up to $2,000 for a heat pump, ended for property placed in service after December 31, 2025. Section 25D ended for expenditures after the same date.

Has Massachusetts launched the HEAR rebates?

Not as of November 13, 2026. DOER's federal funding page says the state's $72.8 million HEAR and $73.1 million HER programs need U.S. Department of Energy approval of the State Implementation Blueprint before they can launch, and gives no launch date.

What is the Mass Save HEAT Loan limit?

Up to $25,000 at 0% for qualified home improvements, per Mass Save's heat pump page on November 13, 2026.

Do I need to weatherize before getting the whole-home rebate?

Yes, unless your home was built in 2000 or later or your Home Energy Assessment recommends less than $1,000 of weatherization.

I live in a municipal light plant town. Can I use Mass Save?

Not for the electric heat pump rebates, which are valid only where Cape Light Compact, Eversource, National Grid or Unitil is the electric sponsor. Your light plant runs its own offers. If you heat with utility gas from a Mass Save gas sponsor, ask that sponsor about weatherization.

Will the Mass Save rebate change in 2027?

Mass Save says whole-home rebates change for projects installed on or after January 1, 2027. The 2027 amounts were not on the 2026 page when we checked.

Does a heat pump save money over oil in Massachusetts?

It depends on your electricity rate and the system's seasonal COP. At an all-in 30 cents per kWh and a COP of 2.5, a heat pump beats oil only above about $3.90 a gallon; at a COP of 3.0, above about $3.25. Against electric baseboard, a heat pump always saves.

Related Reading

• Home energy rebates by province and state, 2026
• Mass Save Heat Pump Rebates
• EmPower Massachusetts
• State Energy Rebate Stacking Guide
• Heat Pump Rebates by State 2026
• IRA Energy Tax Credits After 2025: 25C vs 25D
• HEEHR Income Limits 2026
• HOMES Rebate Program
• Cold Climate Heat Pump Performance Data