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Maine · checked October 20, 2026
Insulation and air sealing rebates in Maine
1 program pays toward insulation and air sealing in Maine right now, with 6 separate offers between them. The largest stated amount is $8,600, from Efficiency Maine insulation and air sealing rebates (Any income). The federal 25C credit for this upgrade ended on December 31, 2025, so the state and utility money below is what is left.
What Maine pays for insulation and air sealing
Efficiency Maine insulation and air sealing rebates Open
Run by Efficiency Maine Trust · statewide
- Any income: $2,000 per large zone (500+ sq ft attic, wall or basement); $1,000 per small zone
- Moderate income: $3,000 per large zone; $1,500 per small zone moderate income
- Low income: $4,000 per large zone; $2,000 per small zone low income
- Attic air sealing, any income: $150 attic, $100 basement, $50 living space
- Attic air sealing, moderate income: $225 attic, $150 basement, $75 living space moderate income
- Attic air sealing, low income: $300 attic, $200 basement, $100 living space low income
Conditions on the program page: Installed by an Efficiency Maine Residential Registered Vendor; Low- and moderate-income rebates for owner-occupied principal residences; One insulation and one air-sealing rebate per zone; up to $8,600 per home ($5,600 per mobile home); Claim within six months of completion.
Source: Efficiency Maine: Insulation rebates. Last checked October 20, 2026. Official program page.
Worked example: one Maine home
Take 1,000 square feet of attic insulation across 2 large zones, on a project that costs $5,000, in a home heated with oil. These are example inputs, not typical prices. Each program's own rule gives the amounts below; where one program has several tiers only the largest one counts, separate programs add up, and a percentage offer with no cost entered is shown at its ceiling.
| Utility | Not income-qualified | Moderate income | Low income |
|---|---|---|---|
| Any Maine utility (Efficiency Maine is statewide) | $4,150 | $5,000 | $5,000 |
For a household that is not income-qualified, the example comes to $4,150, made of $4,000 from Efficiency Maine insulation (Any income) plus $150 from Efficiency Maine insulation (Attic air sealing, any income). A household that meets a program's low-income definition gets $850 more in the same example, because 2 offers are paid at the income-qualified level.
Who can use these Maine offers
Every household in Maine covered by Efficiency Maine can apply; the offers are not limited to one utility's territory. None of these program pages lists an end date, and each can change or stop while funds last.
Federal credit and state IRA rebates
The Energy Efficient Home Improvement Credit (IRC §25C) paid 30% of insulation and air-sealing materials, within the $1,200 annual limit (labor not included). The IRS page says: “can claim the credit for improvements made through December 31, 2025.” Not allowed for property placed in service after December 31, 2025. Source: IRS: Energy Efficient Home Improvement Credit, 26 U.S.C. §25C, as amended by Public Law 119-21 (July 4, 2025). See what the credit covered and when it ended.
Maine IRA Home Energy Rebates: Limited. HEAR ($35.7 million) is active only for heat pumps in new affordable multifamily housing and single-wide mobile homes. HER ($35.9 million) is conditionally awarded. Efficiency Maine is reviewing a June 1, 2026 federal Program Notice. Source: Efficiency Maine: IRA Home Energy Rebates.
How Maine compares
1 of the other 14 covered states list a larger top amount for insulation and air sealing. Open elsewhere: Connecticut $10,000; Vermont $7,000; New Hampshire $6,000; Massachusetts $5,000; North Carolina $1,600; Oregon $1,500; Wisconsin $1,475; Arizona $600. No open, sourced offer is listed in 6 other covered states (California, Florida, Michigan, Pennsylvania, Rhode Island, Texas). Compare them on the insulation and air sealing rebates by state page.
Other upgrades in Maine: air-source heat pump, heat pump water heater, home EV charger. Background: how rebates stack and the federal credit status.
Rebates are set by each program and can change or close without notice; the program's own page and application decide what is paid. This page is information, not tax, legal or financial advice. Amounts last checked October 20, 2026.