Efficiency Maine pays $1,000–$3,000 per qualifying ductless outdoor unit (up to three per home) or $3,000–$9,000 lump-sum for ducted whole-home systems, tiered by household income. A limited-time $500 whole-home bonus applies to qualifying projects with claims submitted March 1 – December 31, 2026. The federal heat pump tax credit is gone for systems placed in service after 2025, so these state rebates are now the primary incentive.
Efficiency Maine residential heat pump rebates
| Income tier | Who qualifies | Per unit | Max (3 units) |
|---|---|---|---|
| Any income | Every Maine homeowner — no income verification | $1,000 | $3,000 |
| Moderate income | AGI up to $70,000 (single) / $100,000 (joint), verified by tax return | $2,000 | $6,000 |
| Low income | Household participates in MaineCare, HEAP, SNAP, or TANF, or meets area income limits | $3,000 | $9,000 |
Ducted whole-home systems receive a single lump-sum rebate on the same three tiers — $3,000 / $6,000 / $9,000 — with stricter requirements: the system must be sized for 100% of the home's peak heating load and any fossil-fuel forced-hot-air furnace must be removed.
Rules that trip people up
- Single-zone only for the per-unit rebate. Multi-zone (branch-box) outdoor units are not rebate-eligible, though their capacity counts toward load-coverage requirements. Two single-zone systems frequently collect more rebate than one multi-zone system of similar capacity — design with the rebate structure in mind.
- Qualified equipment only. The unit must appear on Efficiency Maine's rebate-eligible list of verified cold-climate models. Bargain units that fade below 20°F don't qualify — by design.
- Registered Vendor required. Installation must be performed by an Efficiency Maine Residential Registered Vendor following the program's installation checklist. Most vendors apply the rebate at the point of sale, so you pay the net price.
- Load coverage. New plus existing heat pumps must be sized for at least 80% of the home's peak heating load (100% for the ducted whole-home track).
- Dual-fuel combo units excluded. Heat pump / fossil-fuel combination systems aren't eligible.
- Lifetime caps per housing unit. Once a home has claimed its cap, that's the program maximum for that address.
The 2026 whole-home bonus
An additional $500 per housing unit for eligible whole-home heat pump upgrades completed, with the rebate claim emailed or postmarked, between March 1 and December 31, 2026. It stacks on top of the standard ductless or ducted rebate — and it's scheduled to end with the calendar year, which is a concrete reason not to let a planned project slip into 2027.
What happened to the federal tax credit?
The Section 25C credit (up to $2,000 for heat pumps) ended for systems placed in service after December 31, 2025, under the 2025 federal tax law. There is no federal residential heat pump tax credit for 2026 installations — the trigger is when the system is running, not when you signed or paid. Any guide still promising "30% back from the IRS" is out of date.
Other programs worth knowing
| Program | What it offers | Who it's for |
|---|---|---|
| Efficiency Maine Home Energy Loans | Low- and no-interest financing (up to $25,000) that can be combined with rebates to eliminate upfront cost | Most Maine homeowners; ask your Registered Vendor |
| HEAR (federal Home Electrification & Appliance Rebates) | Deep electrification rebates — single-wide mobile homes can reach roughly $12,900 in ducted rebates | Only income-eligible manufactured/mobile homes and new affordable multifamily; standard single-family homes are not eligible |
| Weatherization rebates | Up to $8,000 (income-tiered) for insulation and air sealing — stacks with heat pump rebates for a combined maximum well over $17,000 | Any Maine homeowner doing envelope work; do it first and buy fewer BTUs |
| Heat pump water heater rebate | Instant/mail-in rebate around $1,100 (recently as low as $850–$1,150 depending on channel) | All income levels |
| New England Heat Pump Accelerator | $450M five-state initiative launched in 2026 to cut installed costs via bulk purchasing and workforce expansion | Watch for participating-contractor pricing through Efficiency Maine |
How the process actually works
- Check your income tier (no paperwork needed for the $1,000 base tier — every Maine homeowner qualifies).
- Get quotes from two or three Registered Vendors via Efficiency Maine's installer locator; ask each to show the rebate line-itemed on the quote.
- For moderate/low-income tiers, complete income verification (tax return or program enrollment) before installation.
- Install; the vendor submits the claim. Point-of-sale vendors deduct the rebate from your invoice; otherwise allow about six weeks for a check.
- Doing whole-home in 2026? Confirm the claim goes in before December 31 to capture the $500 bonus.
Program details verified against Efficiency Maine materials as of mid-2026, and subject to change or termination at any time. Always confirm current amounts and rules at efficiencymaine.com or (866) 376-2463 before signing a contract.
Next step: getting the system designed right — the installation guide.