What Happens Now That the Federal Credit Is Gone?
The federal 25C and 25D tax credits ended on December 31, 2025, so in 2026 Massachusetts homeowners fund heat pump projects through Mass Save instead: a whole-home rebate of $2,650 per ton capped at $8,500, income-eligible rebates up to $16,000, and a 0% HEAT Loan up to $25,000.
What Exactly Ended on December 31, 2025?
Two programs disappeared at once. The 25C Energy Efficient Home Improvement Credit had covered 30% of qualifying heat pump costs up to $2,000 per year, and the 25D Residential Clean Energy Credit had covered geothermal systems. Both were repealed by federal legislation passed in July 2025, with a hard cutoff for equipment placed in service after December 31, 2025.
That means a project completed in January 2026 gets nothing from the IRS that the same project would have earned two months earlier. There is no phase-down, no grandfathering for signed contracts, and no partial credit. If your system was not installed and operational by the deadline, the federal money is simply gone. We spent the fall of 2025 helping homeowners beat that deadline; now the conversation has changed completely.
It is worth being blunt about what this costs a typical household. A homeowner installing a whole-home heat pump in 2025 could often stack a $2,000 federal credit on top of a Mass Save rebate that was then capped at $10,000. In 2026, both numbers have moved the wrong way. The federal credit is zero, and the Mass Save whole-home cap dropped to $8,500. That is a swing of up to $3,500 on the same project.
How Much Can Mass Save Actually Cover in 2026?
Mass Save is now the main source of heat pump money in Massachusetts, and the 2026 program still moves real dollars. The structure has three tiers depending on how much of your home the heat pump serves and your household income.
The whole-home rebate pays $2,650 per ton of installed capacity, capped at $8,500. “Whole-home” means the heat pump becomes the sole heating source for the entire house, or you sign an agreement making it the primary system. A 3-ton system earns $7,950; anything from about 3.2 tons up hits the cap.
The partial-home rebate pays $1,125 per ton for systems that supplement existing heat, say, a mini-split serving an addition while the boiler carries the rest of the house. Partial-home projects can also earn a $500 bonus for verified proper sizing and another $500 bonus for completing recommended weatherization first, which meaningfully narrows the gap with the whole-home tier on smaller projects.
Income-eligible households qualify for enhanced rebates worth up to $16,000, nearly double the standard cap. If your household income falls within the program’s moderate-income thresholds, this tier can cover the majority of a typical installation, and it is the single most underused pot of money we see. Many families who assume they earn too much actually qualify.
Here is how the 2026 tiers compare at a glance:
| Rebate Tier | 2026 Amount | Notes |
|---|---|---|
| Whole-home | $2,650/ton, $8,500 cap | Heat pump is sole or primary heat |
| Partial-home | $1,125/ton | Plus $500 sizing and $500 weatherization bonuses |
| Income-eligible | Up to $16,000 | Enhanced tier for qualifying households |
| HEAT Loan | Up to $25,000 at 0% | Terms up to 84 months |
What Equipment Qualifies Now?
The 2026 rules are stricter about hardware than most homeowners realize. To earn any Mass Save rebate, the equipment must be an ENERGY STAR certified cold-climate heat pump that appears on the program’s qualified product list, not just any efficient unit, but a specific tested model-and-match combination of outdoor and indoor equipment.
Refrigerant matters too. As of 2026, qualifying new systems use R-32 or R-454B refrigerant, the lower-global-warming-potential replacements for R-410A. If a contractor quotes you leftover R-410A inventory at a discount, understand that you may be buying equipment on the wrong side of both the rebate rules and the refrigerant supply curve. Every system we install through our heat pump installation service is checked against the current qualified list before we write the proposal, because an unlisted unit costs you the entire rebate.
How Does the 0% HEAT Loan Change the Math?
The Mass Save HEAT Loan is the piece that makes 2026 projects workable without federal help. Qualifying homeowners can borrow up to $25,000 at 0% interest for up to 84 months through participating Massachusetts lenders. Zero percent means every dollar of your payment goes to principal, there is no financing cost to bury in the fine print.
Consider a whole-home project with a net cost of $12,000 after the rebate. Financed over 84 months at 0%, that is roughly $143 per month, often in the neighborhood of what an oil-heated home already spends on fuel deltas in a cold winter. The loan requires a Mass Save home energy assessment first, which is free and also unlocks the weatherization incentives.
The practical path for a 2026 project looks like this:
- Schedule a no-cost Mass Save home energy assessment.
- Complete any recommended weatherization (heavily subsidized, and it earns the $500 partial-home bonus).
- Get a proposal specifying a qualified cold-climate model with R-32 or R-454B refrigerant.
- Apply for HEAT Loan pre-approval before signing the contract.
- Install, then submit the rebate paperwork with the equipment’s AHRI certificate.
Should You Still Do the Project in 2026?
Honestly, the incentive picture is worse than it was in 2025, we will not pretend otherwise. But waiting rarely improves it. Rebate levels have historically ratcheted down, not up, and equipment prices are rising with the refrigerant transition. A failing 25-year-old boiler or a compressor on its last legs does not care about program calendars, and an emergency replacement in January leaves no time for assessments, loan approvals, or comparison quotes. If your system is aging, running the numbers now, calmly, with the rebates and Mass Save paperwork handled correctly, beats deciding in a no-heat crisis.
If you are weighing a 2026 heat pump project in West Roxbury or anywhere in Greater Boston, Boston Comfort Systems offers free estimates that include the full rebate and HEAT Loan math for your specific house, and our $99 diagnostic fee is waived when you approve a repair or replacement with us. We will tell you plainly whether the numbers work, and when they do not.