Last updated: October 2026
Maine Energy Rebates 2026: Efficiency Maine Heat Pumps, Insulation & Combined Savings
Efficiency Maine is the main source of Maine energy rebates for homeowners, covering heat pumps, insulation, and air sealing. Depending on your household income, a whole-home project can qualify for as much as $19,250. As a Top-Rated Efficiency Maine Vendor for 10+ years, we handle all paperwork and deduct your rebate directly from your invoice, so you are not waiting on a reimbursement check.
What Is Efficiency Maine?
Efficiency Maine is the state's independent administrator for energy efficiency programs. They offer rebates to Maine homeowners who invest in qualifying energy improvements, including heat pumps, insulation, and air sealing.
In addition to other funding, the program is funded by a small surcharge on electricity bills, which means every Maine ratepayer has already been contributing. These rebates are your money coming back to you.
Horizon Homes is a registered Efficiency Maine vendor. That means we can process your rebate directly, deducting it from your invoice before you pay. You never have to file paperwork, wait for a reimbursement check, or deal with the program yourself. We handle everything. For a fuller picture of how registered vendors, Energy Advisors, and program audits fit together, read our Efficiency Maine energy audits and contractors guide.
Every figure on this page is a maximum, not a guarantee. Maine efficiency rebates are income-dependent: the amount you actually receive is set by your income tier (verified through HEAP, SNAP, TANF, or MaineCare participation, or by adjusted gross income), by the scope of the work, and by Efficiency Maine's rules at the time you claim. Lower-income households qualify for the largest rebates, up to $9,000 for heat pumps and $8,600 for weatherization. Your free assessment is where we pin down your specific number.
Amounts current as of Efficiency Maine's October 1, 2026 residential rebate schedule. Program terms and funding can change or end at any time. The figures on this page apply to insulation and air sealing work completed on or after October 1, 2026. Work completed on or before September 30, 2026 falls under the previous schedule, which paid a percentage of project cost. Either way, the rebate claim has to be submitted within six months of completion.
Maine Heat Pump Rebates
Efficiency Maine rebates for heat pumps depend on your household income and the number of outdoor units installed. Income-qualified households receive the largest rebates.
| Household Income | Per Outdoor Unit | Max (3 units) |
|---|---|---|
| Low Income | $3,000 | $9,000 |
| Moderate Income | $2,000 | $6,000 |
| Any Income | $1,000 | $3,000 |
These Efficiency Maine heat pump rebates apply to cold-climate, high-efficiency models rated to perform at -13F or below, like the Mitsubishi Hyper-Heating systems we install. Standard heat pumps that lose capacity in cold weather do not qualify. If you are still deciding which system is right for your home, our energy efficient heating guide covers the full comparison.
Rebate amounts are per outdoor unit, up to three units per home. For a low-income household installing three outdoor units, that is up to $9,000 in Efficiency Maine heat pump rebates alone. Moderate-income households receive up to $6,000, and all Maine homeowners qualify for up to $3,000 regardless of income, with no income verification required for the base tier.
One detail worth knowing before you plan a phased project: these are lifetime limits per housing unit, not annual ones. If you claimed $1,000 on a single head three years ago, that draws down the same cap you would use adding units now. It is one of the reasons whole-home projects tend to capture more of the available Maine efficiency rebates than a series of small ones.
These rebates can be combined with Maine insulation rebates and air sealing rebates for a combined maximum of $19,250. We handle all Efficiency Maine paperwork and deduct the rebate directly from your invoice. You pay the net amount.
Note: Rebates apply to single-zone outdoor units only. Multi-zone branch box systems (one large outdoor unit feeding multiple indoor heads) are not eligible for the per-unit rebate. The Mitsubishi Hyper-Heating cold-climate systems we install are on Efficiency Maine's Qualified Product List and qualify for all rebate tiers.
Rebate amounts are subject to change. Program details set by Efficiency Maine. Contact us for current rates and to verify your eligibility.
Maine Insulation Rebates & Air Sealing
Efficiency Maine also offers substantial Maine insulation rebates and air sealing incentives, two of the most cost-effective ways to improve your home's comfort and efficiency. See our detailed breakdown of Maine insulation rebates and how to qualify.
Efficiency Maine's Home Energy Savings Program provides weatherization rebates covering blown-in cellulose insulation, air sealing, and building envelope improvements. As a registered vendor, Horizon Homes applies these Efficiency Maine insulation rebates directly to your invoice - you pay the net amount, no paperwork, no waiting on reimbursement.
As of October 1, 2026, the rebate is a fixed dollar amount per zone of the house, not a percentage of what the job costs. A zone is the attic, the walls, or the basement. You can claim one insulation rebate and one air sealing rebate per zone, and the amount depends on your income tier and how large the zone is. Like the heat pump rebates, these Maine efficiency rebates carry a lifetime limit per building rather than an annual one, and the claim has to be submitted within six months of the work being finished.
| Zone | Low Income | Moderate Income | Any Income |
|---|---|---|---|
| Insulation, small zone (250-499 sq ft) | $2,000 | $1,500 | $1,000 |
| Insulation, large zone (500+ sq ft) | $4,000 | $3,000 | $2,000 |
| Mobile home underbelly (500+ sq ft) | $5,000 | $4,000 | $3,000 |
| Air sealing, attic | $300 | $225 | $150 |
| Air sealing, basement or underbelly | $200 | $150 | $100 |
| Air sealing, living space | $100 | $75 | $50 |
| Lifetime limit per building | $8,600 ($5,600 for a mobile home), all income tiers | ||
Maximums shown, not guaranteed amounts. Your rebate depends on your income tier, which zones you insulate, and zone size. A whole-home project (attic, walls, basement) reaches $8,600 at the low and moderate tiers and about $6,300 at the any-income tier. These figures apply to work completed on or after October 1, 2026; work completed on or before September 30, 2026 falls under the previous percentage-of-cost schedule. These rebates can be combined with heat pump rebates for additional savings on whole-home projects.
Stack Your Rebates for Maximum Savings
Heat pump rebates and insulation rebates are separate programs. You can claim both on the same project. A whole-home project unlocks the $500 bonus.
| Program | Low Income | Moderate Income | Any Income |
|---|---|---|---|
| Heat pumps (up to 3 units) | $9,000 | $6,000 | $3,000 |
| $500 whole-home bonus (through Dec 2026) | $500 | $500 | $500 |
| Insulation & air sealing (whole home) | $8,600 | $8,600 | $6,300 |
| Heat pump water heater | $1,150 | $1,150 | $1,150 |
| Combined Maximum | $19,250 | $16,250 | $10,950 |
Rebate amounts subject to change. Income thresholds set by Efficiency Maine. The insulation and air sealing row assumes a whole-home project (attic, walls, basement) and is bounded by the $8,600 lifetime limit per building. The $500 whole-home heat pump bonus applies to upgrades completed and claimed through December 31, 2026. Federal 25C energy tax credits expired December 31, 2025 and are not included above.
What a Real Project Looks Like
Moderate-income household in Greater Portland: attic insulation plus two cold-climate heat pump units.
| Item | Cost | Rebate | You Pay |
|---|---|---|---|
| Attic insulation + air sealing | $7,500 | $3,225 ($3,000 large zone + $225 air sealing) | $4,275 |
| 2 cold-climate heat pump units | $12,000 | $4,500 ($2,000 x 2 + $500 bonus) | $7,500 |
| Total | $19,500 | $7,725 | $11,775 |
The rebates are deducted directly from your invoice, so you never pay the full $19,500. The $7,725 in rebates is paid to us by Efficiency Maine after the project is complete. A low-income household would qualify for more on the same scope of work, up to $10,800. Insulating the walls and basement as well as the attic would add more still, up to the $8,600 lifetime limit. This is an illustration, not a quote. Every home is different, and your free assessment is what produces your actual numbers.
We Handle Everything: You Just Save
As a registered Efficiency Maine vendor, we manage the entire rebate process on your behalf.
Free Assessment
We assess your home and calculate your exact rebate eligibility, before you commit to anything.
Rebate Deducted Upfront
Your Efficiency Maine rebate is deducted directly from your invoice. You pay the net amount. No waiting for a check.
We File the Paperwork
We submit all required documentation to Efficiency Maine on your behalf. You don't have to do a thing.
Who Qualifies for Efficiency Maine Rebates?
The short answer: almost every Maine homeowner. All Maine residents who own their home and pay an electricity bill are eligible for some level of rebate. The amount you receive depends on your household income relative to the Area Median Income (AMI).
Income Tiers Explained
- Low Income: Verified participation in HEAP, SNAP, TANF, or income-based MaineCare. These households receive the highest rebates: up to $8,600 for weatherization and $3,000 per outdoor heat pump unit.
- Moderate Income: Adjusted gross income (AGI) at or below $70,000 (single/head of household) or $100,000 (married filing jointly). Mid-tier rebates: up to $8,600 for weatherization and $2,000 per outdoor heat pump unit.
- Any Income: All Maine ratepayers qualify with no income verification needed. Base-level rebates: up to $6,300 for weatherization and $1,000 per outdoor unit.
How to Verify Your Eligibility
You don't need to verify your income before contacting us. During your free home energy assessment, we'll help you determine which income tier you fall into and calculate your exact rebate amount. If you qualify for income-based rebates, we'll walk you through the simple documentation process.
Not sure where you stand? Schedule a free assessment and we'll figure it out together.