Mass Save® heat pump rebates for homeowners in 2026

How much are Mass Save® residential heat pump rebates in 2026?

Sources: standard rebate form, basic rebate form, and enhanced heat pump incentives.

The rebate cannot exceed the eligible installation cost. Whole-home, partial-home, and basic rebates cannot be claimed together for the same equipment. A maximum is a ceiling, not the amount every home receives.

Does my home qualify through my electric or gas utility?

For standard whole-home and partial-home rebates, start with the heating fuel you are replacing. The correct account may be your gas account even when a different company supplies your electricity.

Source: 2026 residential rebate form, eligibility check and municipal-electric footnote.

The basic rebate has its own electric-account requirement. A participating gas account alone does not establish basic-rebate eligibility. Use the basic application when replacing an existing heat pump rather than assuming the larger rebate applies.

What is the difference between whole-home and partial-home rebates?

Whole-home means the heat pumps can heat all conditioned space and serve as the home's sole heat source. The verification form requires sizing at 90% to 120% of the home's heating load at its outdoor design temperature, based on ACCA Manual J design conditions. The prior space-heating system must be removed or disabled. A boiler retained for domestic hot water cannot remain available for space heating under this route.

Partial-home can fit a project that keeps a furnace or boiler for supplemental heat. Qualified integrated controls are required in served zones where oil, propane, or gas heat remains in use. If the old heat is fully removed or disconnected from a zone, the program provides an exception to that control requirement, with documentation on the invoice.

Both standard routes require full-time occupancy during the winter heating season. The number of indoor heads does not decide the route. The design and the way the existing heating system will be used do.

Sources: whole-home verification form and partial-home eligibility requirements.

How do I calculate a rebate from the equipment quote?

Mass Save® calculates tons from AHRI-certified cooling capacity divided by 12,000 BTU per hour. Find the certified capacity for the proposed system, then multiply the resulting tons by the applicable rate and apply the program cap. Use the certified system capacity, not the number of rooms or a model's marketing name.

These columns compare formulas. A project must meet the rules for its route, and the installation-cost limit still applies. Choosing larger equipment just to reach a rebate cap is not a sizing method. Ask the installer to explain the home's heating-load calculation and proposed capacity.

Formula and rates: Mass Save® rebate schedule and tonnage definition. Sizing questions: Mass Save® questions for your installer.

Which mini-split systems and installers qualify?

Check the exact system on the current Mass Save® Heat Pump Qualified Product List, including the proposed indoor and outdoor equipment. Brand recognition or an ENERGY STAR label alone does not establish rebate eligibility. Installation must be by a participating Heat Pump Installer Network contractor.

Refrigerant matters in 2026. Mass Save® removed new split systems with a global warming potential above 700, including R-410A systems, from the list on January 1. The published transition exceptions concern other equipment categories; do not assume they cover a residential ductless mini-split.

Before signing, ask for the model numbers, AHRI reference, and current qualified-list match. Our guide to mini-splits that qualify for Mass Save® explains how to check the equipment in more detail.

Sources: current Qualified Product List and refrigerant rules and participating heat pump installers.

Do I need a Home Energy Assessment or insulation first?

A Home Energy Assessment identifies efficiency improvements and provides a report on available offers. It is different from a contractor's installation estimate. Start with the Mass Save® assessment route to identify any insulation and air-sealing work before committing to equipment.

For standard whole-home rebates, sufficient weatherization can be demonstrated when the home was built in 2000 or later, the assessment recommends less than $1,000 in weatherization, or recommendations made in 2013 or later have been completed. The whole-home verification form states the exact conditions.

For homes in buildings with five or more units, the residential eligibility page describes a weatherization exception. Confirm the building's route rather than applying single-family requirements automatically.

Mass Save® also describes a six-month allowance after installation for completing an assessment or weatherization, with the whole-home rebate held until weatherization is complete. Confirm the project's sequence in advance instead of planning around an exception. See the official heat pump FAQs.

For partial-home projects, the weatherization bonus requires an assessment and recommended work within one year before or six months after installation. The sizing bonus requires equipment serving 100% of conditioned space at 90% to 120% of the design heating load, with the heating-load calculation submitted. Both bonuses must be requested with the heat pump rebate in the same online application. See the partial-home bonus requirements. Financing and income-based offers have additional assessment requirements.

Can income-qualified homeowners receive more help?

Yes. The enhanced air-source heat pump rebate can reach $16,000 for qualifying households. It requires an eligible electric account and displacement of oil, propane, or electric-resistance heat. A natural-gas-heated home does not qualify for this enhanced heating offer merely because the household meets the income limit.

Verify income eligibility before proceeding. Recommended weatherization must be completed, and the equipment and installer must qualify. Whole-home enhanced rebates also have building and metering requirements. Use the enhanced rebate requirements for the full conditions.

A separate turnkey route can provide qualifying heat pumps for up to no cost. That program manages the work and applies cost-effectiveness screening. It is not a promise that any independently selected installation will be fully reimbursed. Household size and income determine the relevant screening route; use the current income-qualification tool and turnkey offer, rather than an old income chart. Cape Light Compact customers should confirm their offer directly with the Compact.

How do I apply, and what is the 2026 deadline?

For the 2026 program, qualifying equipment must be purchased and installed by December 31, 2026. Mass Save® says the application and supporting documents must be received by February 28, 2027. Submit early enough to resolve missing information.

1. Confirm the fuel, utility-account route, and standard or income-qualified offer. The residential program offers optional project pre-verification through its online portal.
2. Identify assessment, weatherization, controls, and financing requirements before installation. Arrange any HEAT Loan before the work.
3. Use a participating installer and qualifying equipment, with the system design and rebate assumptions in writing.
4. After installation, collect the signed application, itemized installer invoice, equipment model numbers, installation address and date, system cost, and proof of payment. Add the whole-home verification form or sizing documents when required.
5. Submit through the Mass Save® rebate portal or the applicable mail-in form. Partial-home sizing and weatherization bonuses must be included with the heat pump rebate in the same online submission. Keep a copy and track the submission.
6. Respond to document requests and provide access if the program selects the installation for inspection.

Sources: standard application and document checklist, basic application checklist, and residential participation steps.

Mass Save® advises allowing six to eight weeks for processing; missing documents or an inspection can affect payment. The portal provides status tracking. A contractor's estimated rebate does not establish program approval. See the rebate processing FAQs.

Can I finance the balance or claim a federal tax credit?

The residential HEAT Loan offers 0% financing for approved improvements, up to a cumulative $25,000. Previous borrowing can reduce the remaining amount. Program authorization and participating-lender approval are separate steps, and financing must be arranged before installation. A Home Energy Assessment is required for whole-home heat pumps and partial-home projects seeking bonus incentives under the loan program. See Mass Save® HEAT Loan requirements.

A loan spreads the remaining cost over time; it does not reduce the installation price. Compare quotes using the same figures: full project price, verified rebate assumptions, amount to finance, and payment terms.

Do not add the former federal Section 25C heat pump tax credit to a 2026 installation budget. The IRS states that the Energy Efficient Home Improvement Credit ended for property placed in service after December 31, 2025. A qualifying 2025 installation claimed on a tax return filed in 2026 is a different situation. Source: IRS Energy Efficient Home Improvement Credit.

What should I ask before accepting a heat pump quote?

Ask the installer to show the answers in writing:

• Which rebate route fits my existing heating and utility account?
• What exact equipment and AHRI reference support the rebate calculation?
• What heating-load calculation supports the selected size?
• What must happen to my existing heating equipment and controls?
• Which assessment, weatherization, or financing steps remain before installation?
• What is the full installed price, the assumed rebate, and the balance I must pay?
• Who submits the application, who receives payment, and what happens if the approved amount differs?

Mass Save® recommends comparing contractor proposals and asking about design, installation, and operation. Its installer question checklist is a useful starting point.

If a contractor offers an upfront rebate credit, read the written advance terms. Mass Save® permits an eligible installer to be named as payee with account-holder authorization; the contractor's advance and the program's approval are separate. For our arrangement, read Advanced Ductless's point-of-sale rebate process.

Homeowner rebate questions

What should I do next?

Start with your heating fuel and utility bill. Compare the relevant rebate route, check income-based options, and resolve assessment, equipment, and financing requirements before installation. Keep the rebate calculation and payment arrangement visible in the quote. That makes proposals easier to compare and helps you spot an unsupported maximum-rebate claim before committing.

For a commercial property, use our separate Mass Save® guide for small businesses. Its rates and approval rules are different.

Sources and review dates

We checked the current program pages and 2026 application forms on September 28, 2026. Calculations are examples derived from those rates. Review is due before January 1, 2027; program terms and final approval are controlled by the Mass Save® Sponsors.

• Residential air-source heat pump program and 2026 standard rebate application
• 2026 basic rebate application and whole-home verification form
• Enhanced heat pump rebates and income-qualified offers
• Heat Pump Qualified Product List and participating installer search
• Home Energy Assessments, HEAT Loan, and program FAQs
• IRS Energy Efficient Home Improvement Credit