Last updated: August 2026
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 $18,650. 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.
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.
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 household income relative to the Area Median Income (AMI), 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 $8,000 for weatherization. Your free assessment is where we pin down your specific number.
Amounts current as of Efficiency Maine's May 2026 residential rebate schedule. Program terms and funding can change or end at any time. Insulation and air sealing projects must be completed on or before September 30, 2026 under the current program year, with the rebate claim submitted within six months of completion.
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 $18,650. 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.
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.
The rebate is calculated as a percentage of project cost up to a ceiling, so the tier you land in changes both numbers. It is worth being clear about what that means in practice: a $5,000 air sealing and cellulose job pays out $2,000 at the any-income tier and $4,000 at the low-income tier, because the percentage moves before the cap ever comes into play. Like the heat pump rebates, these Maine efficiency rebates carry a lifetime limit per building rather than an annual one.
| Household Income | % of Project Cost | Maximum Rebate |
|---|---|---|
| Low Income | 80% | $8,000 |
| Moderate Income | 60% | $6,000 |
| Any Income | 40% | $4,000 |
Maximums shown, not guaranteed amounts. Your rebate depends on household income and verified project cost. Insulation and air sealing work must be completed on or before September 30, 2026 under the current program year. These rebates can be combined with heat pump rebates for additional savings on whole-home projects.
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 | $8,000 | $6,000 | $4,000 |
| Heat pump water heater | $1,150 | $1,150 | $1,150 |
| Combined Maximum | $18,650 | $13,650 | $8,650 |
Rebate amounts subject to change. Income thresholds set by Efficiency Maine. Federal 25C energy tax credits expired December 31, 2025 and are not included above.
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 | $4,500 (60% of cost) | $3,000 |
| 2 cold-climate heat pump units | $12,000 | $4,500 ($2,000 x 2 + $500 bonus) | $7,500 |
| Total | $19,500 | $9,000 | $10,500 |
The rebates are deducted directly from your invoice, so you never pay the full $19,500. The $9,000 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 $14,000. This is an illustration, not a quote. Every home is different, and your free assessment is what produces your actual numbers.
As a registered Efficiency Maine vendor, we manage the entire rebate process on your behalf.
We assess your home and calculate your exact rebate eligibility, before you commit to anything.
Your Efficiency Maine rebate is deducted directly from your invoice. You pay the net amount. No waiting for a check.
We submit all required documentation to Efficiency Maine on your behalf. You don't have to do a thing.
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).
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.
