Maine Heat Pump Rebates & Incentives (2026)
There are no federal residential heat pump tax credits in 2026. Efficiency Maine rebates — ranging from $1,000–$9,000 per system depending on income and system type — are the primary incentive for Maine homeowners. A $500 whole-home bonus runs through December 2026. This guide covers all major Maine heat pump incentives available in 2026, including Efficiency Maine rebates, HEAR for mobile homes, the NE Heat Pump Accelerator, and Home Energy Loans. Here's what's actually available.
Updated July 14, 2026 — verified against official program sources
Rates and program availability may change after this date.
Maine
Open
Efficiency Maine heat pump rebates are active through Triennial Plan VI ($529.3M): $1,000–$3,000 per outdoor unit (all-other-whole-home systems) and $3,000–$9,000 lump sum (ducted), by income tier. A $500/unit whole-home bonus runs March–December 2026. NEHPA funds in Maine flow through Efficiency Maine’s water heater discounts — no separate per-unit consumer discount. HEAR is limited to mobile homes and affordable multifamily. Federal 25C/25D ended Dec 31, 2025.
Sources:
Short Version
✓ Efficiency Maine Rebates
$1,000–$3,000 per outdoor unit (non-ducted) or $3,000–$9,000 lump sum (ducted whole-home), depending on income tier. Lifetime cap $3,000–$9,000.
✓ Bonus + Water Heaters + Loans
$500 whole-home bonus through Dec 2026. $1,150+ for heat pump water heaters. Green Bank loans up to $25,000 — 1-year 0% APR ($500 origination fee) or 5.99%–7.99% fixed.
✓ Total Potential Savings
$3,500 (any income) to $9,500+ (low income). HEAR-eligible mobile homes can reach ~$17,000 total incentives.
✗ Federal Tax Credits Expired
Both Section 25C ($2,000 heat pump credit) and Section 25D (30% geothermal credit) ended December 31, 2025. Not available for 2026 installations.
⚠ HEAR Is Limited to Mobile Homes and Affordable Multifamily
Maine's Home Electrification and Appliance Rebates (HEAR) program is only partially active. Standard single-family homeowners are not eligible. A second HEAR phase for moderate-income households is planned, but no launch date has been announced.
Federal Heat Pump Tax Credits Are Not Available in 2026
The Section 25C Energy Efficient Home Improvement Credit applies only to qualifying property placed in service through December 31, 2025, and the Section 25D Residential Clean Energy Credit applies only to expenditures made through the same date. This change was part of the One Big Beautiful Bill Act (OBBBA) signed July 4, 2025. Previously, homeowners could claim up to $2,000 for a qualifying heat pump under 25C, or 30% of geothermal system costs (no cap) under 25D. Neither credit is available for 2026 installations. Full details on the federal credit expiration →
Core Rebates Don't Depend on the Expired Federal Credits
Efficiency Maine's core heat pump rebates are funded primarily by utility ratepayers and RGGI (Regional Greenhouse Gas Initiative) proceeds, supplemented by federal grants for specific initiatives — so rebate levels do not depend on the expired federal tax credits. Executive director Michael Stoddard confirmed in December 2025 that Efficiency Maine has no plans to modify its heat pump incentives following the federal expiration.
Efficiency Maine Heat Pump Rebates
Efficiency Maine Trust administers all statewide heat pump rebates under Triennial Plan VI ($529.3 million if fully funded). Maine hit its 100,000-heat-pump goal in 2023 — two years early — has since surpassed 200,000 installations (as of early 2026), and is targeting 275,000 total by 2027. Rebates are applied at point of sale through your installer — you pay the reduced price, not the full amount. For every rebate Efficiency Maine administers — heat pumps, water heaters, geothermal, and loans — see our Efficiency Maine program guide.
All Other Whole-Home Systems (Mini-Splits) — Per Outdoor Unit
| Income Tier | Per Outdoor Unit | Lifetime Cap |
|---|---|---|
| Low income | $3,000 | $9,000 |
| Moderate income | $2,000 | $6,000 |
| Any income | $1,000 | $3,000 |
Ducted Whole-Home Systems — Per Housing Unit
Ducted systems receive a single lump-sum rebate. Requirements are stricter: the system must be sized for 100% of peak heating load, and all fossil fuel forced hot air furnaces must be physically removed.
| Income Tier | Rebate (Per Housing Unit) |
|---|---|
| Low income | $9,000 |
| Moderate income | $6,000 |
| Any income | $3,000 |
Single-wide mobile homes may qualify for up to $12,900 in ducted rebates.
$500 Whole-Home Heat Pump Bonus (March–December 2026)
✓ $500 Bonus Active Now
An additional $500 per housing unit for eligible whole-home heat pump upgrades completed, and rebate claims emailed or postmarked, between March 1 and December 31, 2026. Stacks on top of standard non-ducted or ducted rebates. Single-wide mobile homes are not eligible.
Income Qualification
Low income: Homeowner or household member participates in MaineCare, HEAP, SNAP, or TANF. Must verify eligibility before installation.
Moderate income: Adjusted Gross Income (AGI) up to $70,000 for individual filers, or $100,000 for joint filers. Must verify eligibility before installation.
Any income: No income verification required. Available to all Maine homeowners.
Equipment and Sizing Requirements
Only single-zone heat pumps on Efficiency Maine's eligible product list qualify for rebates. Multi-zone systems are not rebatable, but their heating capacity can count toward the total. Heat pumps must be sized for at least 80% of the home's peak heating load at ASHRAE 99.6% design temperature. Combined with supplemental electric heat, the system must cover 100% of peak load. One additional eligibility rule: the housing unit must not have had a natural gas utility account before the upgrade.
⚠ Common Mistake: Dual Fuel Systems Are Not Eligible
Dual fuel (heat pump + fossil fuel furnace) systems do not qualify for Efficiency Maine rebates. Primary fossil-fuel systems can remain only as emergency backup — their capacity does not count toward the 100% requirement. Plan for full electric backup if keeping an oil or gas system.
Heat Pump Water Heaters
Efficiency Maine offers heat pump water heater incentives two ways: an instant discount at participating retailers and distributors (for example, $1,200 off at Home Depot as of May 2026 — amounts vary by retailer), or a $1,150 mail-in rebate for purchases made without an instant discount. The two cannot be combined. Equipment must be ENERGY STAR certified — any brand and tank size. DIY installation qualifies. Only one HPWH incentive per installation address per calendar year, and mail-in claims must be emailed or postmarked within six months of purchase. These discounts are funded in part by Maine's share of the New England Heat Pump Accelerator (see below).
Geothermal Heat Pump Rebates
Efficiency Maine covers one-third of project cost up to $3,000 for qualifying geothermal heat pumps, with a lifetime limit of one geothermal rebate per housing unit. No income-based tiers — the same formula applies at all income levels. Equipment must be ENERGY STAR certified and installation must be done by a Residential Registered Vendor for Geothermal Systems. With the federal Section 25D credit gone, this is the sole remaining incentive for residential geothermal in Maine.
HEAR Program Status (Home Electrification and Appliance Rebates)
⚠ Partially Active — Limited Eligibility
HEAR is available only for mobile/manufactured homes and new affordable multifamily construction. Standard single-family homes are not eligible. A second HEAR phase opening rebates to moderate-income households is planned under the current Triennial Plan, but no launch date has been announced.
Maine's HEAR program is funded by $35.7 million in IRA Section 50122 dollars and administered by Efficiency Maine Trust under the Maine Department of Energy Resources. It is deployed in phases, starting with the most energy-burdened housing types.
For eligible homes, HEAR provides up to $8,000 per unit for heat pump systems, plus up to $1,750 for heat pump water heaters, $4,000 for electric panel upgrades, and $2,500 for wiring — capped at $14,000 per household. Low-income households (≤80% of Area Median Income) receive 100% of costs. HEAR funding runs through September 2031 or until exhausted.
New England Heat Pump Accelerator ($450M, 5-State)
The NE Heat Pump Accelerator (NEHPA) is a collaboration between Connecticut, Maine, Massachusetts, New Hampshire, and Rhode Island, funded by $450 million in EPA Climate Pollution Reduction Grants and running through 2029. It aims to install 580,000 residential heat pumps region-wide by 2030. Maine's arrangement differs from the other four states: instead of the per-unit pass-through discounts offered in CT, MA, NH, and RI, Maine's roughly $43 million share funds the heat pump water heater instant discounts at participating Maine distributors and retailers (targeting 30,000 additional installations), plus pilot projects addressing barriers to whole-home heat pump adoption.
In practice this means Maine homeowners access Accelerator funding automatically through Efficiency Maine's existing water heater discounts — there is no separate NEHPA consumer rebate to apply for or stack in Maine.
Efficiency Maine Home Energy Loans
Efficiency Maine's Green Bank offers unsecured, fixed-rate loans — no lien on property or equipment — with no application fee and no prepayment penalty. Four options are available. Note that the 1-year 0% APR loan carries a $500 origination fee; the other three options have no origination fee. Funds are disbursed directly to the Registered Vendor after project completion.
| Loan Option | APR | Max Amount | Fees & Underwriting |
|---|---|---|---|
| 1-Year | 0% | $25,000 | $500 origination fee; FICO 620+, DTI up to 55% |
| 5-Year | 5.99% | $25,000 | No origination fee; FICO 620+, DTI up to 55% |
| 10-Year | 7.99% | $25,000 | No origination fee; FICO 620+, DTI up to 55% |
| Income-Based 10-Year | 5.99% | $7,500 | No origination fee; FICO 580+, DTI up to 70%; income eligibility must be verified by Efficiency Maine within the past year |
Rates verified July 14, 2026 against Efficiency Maine's loan page; rates are subject to change. The financed amount cannot exceed net project cost (total cost minus anticipated rebates), and a project does not need to receive an Efficiency Maine rebate to qualify for a loan.
Eligible upgrades include heat pumps (not dual fuel), electrical panel upgrades required for heat pump projects, insulation, air sealing, and health/safety improvements up to 25% of the financed amount.
How Maine Heat Pump Incentives Stack
Efficiency Maine rebates and the $500 whole-home bonus stack automatically. HEAR stacks only for eligible mobile/manufactured homes. NEHPA funds in Maine flow through Efficiency Maine's water heater discounts, so there is no separate Accelerator discount to stack on heat pump projects. Total incentives cannot exceed project cost.
Any Income — 3-Zone Mini-Split System
- Efficiency Maine rebate: $1,000/unit × 3 = $3,000
- Whole-home bonus: $500
Realistic maximum: ~$3,500
Moderate Income — 3-Zone Mini-Split System
- Efficiency Maine rebate: $2,000/unit × 3 = $6,000
- Whole-home bonus: $500
Realistic maximum: ~$6,500
Low Income — 3-Zone Mini-Split System
- Efficiency Maine rebate: $3,000/unit × 3 = $9,000
- Whole-home bonus: $500
- HEAR (mobile homes only): up to $8,000
Realistic maximum: ~$9,500 (single-family) or ~$17,000 (HEAR-eligible single-wide mobile home, which does not get the $500 bonus)
What You'll Actually Pay
A typical 3-zone mini-split system costs $12,000–$18,000 installed. After Efficiency Maine rebates: $8,500–$14,500 out of pocket (any income) to $2,500–$8,500 out of pocket (low income). HEAR-eligible mobile home owners may pay close to $0. Efficiency Maine's Home Energy Loans can eliminate the upfront cost entirely — the 1-year 0% APR option carries a $500 origination fee, and 5- and 10-year terms run 5.99%–7.99% (see loan table above).
Municipal ARPA-funded programs (South Portland, Portland, Auburn) may provide additional stacking where available. No state tax credit is available in Maine.
Insulation and Weatherization Rebates
Weatherizing before installing heat pumps reduces the required system size and maximizes efficiency. Efficiency Maine offers insulation rebates that can be combined with heat pump rebates and Home Energy Loans.
| Income Tier | Rebate Covers | Max Per Building |
|---|---|---|
| Low income | 80% of cost | $8,000 |
| Moderate income | 60% of cost | $6,000 |
| Any income | 40% of cost | $4,000 |
Eligible work includes attic, wall, and basement insulation and air sealing. A BPI-certified assessment (blower door test) is required. Work must be done by a Residential Registered Vendor. Low-income homeowners may also qualify for the free Maine Weatherization Assistance Program (WAP) through MaineHousing and local Community Action Agencies.
Climate Context: Heat Pumps in Maine Winters
Maine is one of the coldest states to adopt heat pumps at scale. Efficiency Maine requires all rebated systems to have rated heating capacity at ASHRAE 99.6% design temperatures. Cold-climate heat pumps with rated output at these temperatures are standard for all rebated installations.
| City | ASHRAE 99.6% Design Temp | Primary Heating Fuel Displaced |
|---|---|---|
| Portland | 0°F | Heating oil |
| Bangor | −7°F | Heating oil |
| Caribou | −14°F | Heating oil / propane |
✓ Best Candidates for Heat Pumps in Maine
Homeowners heating with oil or propane (Maine is the most oil-dependent state for home heating). Homes that can meet the 80% heating load requirement with single-zone units. Low- and moderate-income households who qualify for the highest rebate tiers. Homeowners willing to weatherize first to reduce system sizing requirements.
Maine's high oil dependence means heat pump conversions often produce significant fuel cost savings. For information on pairing heat pumps with home battery storage, see our guide to home batteries in 2026.
How to Apply for Efficiency Maine Heat Pump Rebates
Verify income eligibility (if applicable)
Low- and moderate-income customers must verify eligibility at efficiencymaine.com before installation. Any-income tier needs no verification.
Hire a Residential Registered Vendor
Find one at Efficiency Maine's vendor locator. Only registered vendors can process rebates.
Complete the installation
Your vendor installs the system per Efficiency Maine's installation requirements checklist. Rebate is applied at point of sale.
Submit the claim form
Email to hesp@efficiencymaine.com or mail to PO Box 219, Brunswick, ME 04011-0219. Must be submitted within 6 months of project completion. Allow approximately 6 weeks for processing.
Questions? Call Efficiency Maine at 866-376-2463 or email info@efficiencymaine.com.
What to Watch
IRA Funding Runway
HEAR funding ($35.7M) runs through September 2031 but could be affected by federal policy changes. Efficiency Maine's core rebates are funded primarily through ratepayers and RGGI proceeds, so rebate levels do not depend on federal tax policy.
HEAR Expansion to Single-Family
The approved Triennial Plan includes a second HEAR phase opening rebates to moderate-income households, but no launch date has been announced. If expansion reaches single-family homes, single-family homeowners could access up to $8,000 in additional rebates that stack with Efficiency Maine.
$500 Bonus Expiration
The $500 whole-home bonus expires December 31, 2026. Claims must be emailed or postmarked by that date. No announcement on whether it will be renewed.
Rebate Structure Changes
The anticipated restructure landed as new branding: Efficiency Maine now presents all residential heat pump rebates as "Whole-Home Heat Pump Rebates" (ducted systems vs. all other whole-home systems), reinforcing that heat pumps must serve as the primary heating system. Rebate amounts are unchanged. Watch for further structural changes at the next plan update.
Frequently Asked Questions
What heat pump rebates are available in Maine in 2026?
Efficiency Maine offers $1,000–$3,000 per outdoor unit for non-ducted systems (lifetime cap $3,000–$9,000 depending on income) and $3,000–$9,000 lump sum for ducted whole-home systems. A $500 whole-home bonus runs through December 2026. Heat pump water heaters get a $1,150 mail-in rebate or larger instant discounts at participating retailers. Geothermal systems receive one-third of project cost up to $3,000. Federal 25C/25D tax credits are not available in 2026.
Can I stack Efficiency Maine rebates with HEAR in Maine?
Only if your home qualifies for HEAR — currently limited to mobile/manufactured homes and affordable multifamily. A low-income household in a qualifying mobile home could receive up to $9,000 from Efficiency Maine plus up to $8,000 from HEAR, for a potential total of $17,000. Standard single-family homes cannot access HEAR rebates.
Do cold-climate heat pumps work in Maine winters?
Yes. Efficiency Maine requires equipment to have rated heating capacity at ASHRAE 99.6% design temperatures — 0°F for Portland, −7°F for Bangor, and −14°F for Caribou. Maine surpassed its 100,000-heat-pump goal in 2023, has since passed 200,000 installations, and is targeting 275,000 total by 2027. Systems must cover at least 80% of peak heating load, with electric backup covering the remaining 20%.
Who administers Maine’s heat pump rebate programs?
Efficiency Maine Trust administers all statewide heat pump rebates. Core funding comes primarily from utility ratepayers and RGGI (Regional Greenhouse Gas Initiative) proceeds under Triennial Plan VI ($529.3 million), supplemented by federal grants for specific initiatives. HEAR is funded by $35.7 million in IRA Section 50122 dollars and administered by Efficiency Maine under the Maine Department of Energy Resources.
What equipment qualifies for Efficiency Maine heat pump rebates?
Only single-zone heat pumps on Efficiency Maine’s eligible product list qualify for rebates. Multi-zone systems are not rebatable, but their capacity can count toward the 80% heating load requirement. Dual fuel (heat pump plus fossil fuel furnace) systems are not eligible. Equipment must have heating capacity at your location’s ASHRAE 99.6% design temperature.
Sources
- Efficiency Maine — Whole-Home Heat Pump Rebates
- Efficiency Maine — Ducted Heat Pump Rebates
- Efficiency Maine — Heat Pump Water Heaters
- Efficiency Maine — Geothermal Rebates
- Efficiency Maine — Home Energy Loans
- Maine DOER — Home Energy Rebates (HEAR status)
- NEHPA — New England Heat Pump Accelerator
- IRS 25C (expired)
Disclaimer: This page covers the main statewide and IRA heat pump incentives available to Maine homeowners in 2026. It does not calculate savings, guarantee eligibility, or represent any incentive program. Efficiency Maine rebate tiers, income thresholds, and eligible product lists are subject to periodic updates. We verify status regularly but programs can change without notice. Always confirm current amounts and eligibility with Efficiency Maine Trust and your contractor before making decisions.
See how this state compares → Heat Pump Rebates by State (2026)