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Efficiency Maine Heat Pump Rebate (2026) | HeatPumpAtlasUSA

Rebate program · Maine

Efficiency Maine Heat Pump Rebate (2026)

Efficiency Maine pays up to $9,000 for qualifying households. See the income tiers, the per-unit caps, which programs are reserved, and how to sequence a Maine project.

Written by HeatPumpAtlasUSA Editorial Reviewed by HeatPumpAtlasUSA Editorial Updated How we calculate this
Open
Administrator
Efficiency Maine Trust
Last verified
Income limits
Apply to some tiers
Official program page

What the program pays

Efficiency Maine Heat Pump Rebates incentive amounts

  • Standard rebate

    Amount
    $500 to $1,000
    Status
    Open
    Notes
    Standard tier, with a lifetime cap per housing unit.

  • Moderate-income rebate

    Amount
    $1,000 to $2,000
    Status
    Open
    Notes
    Income-qualified tier.

  • Low-income rebate

    Amount
    $3,000 to $9,000
    Status
    Open
    Notes
    Up to $3,000 per eligible outdoor unit within a lifetime limit of $9,000 per housing unit.

  • Maine HEAR

    Amount
    $0 to $8,000
    Status
    Reserved
    Notes
    Maine reached its initial reservation ceiling quickly and paused new applications. Treat as a waitlist, not as available money.
Amounts reflect published program terms as of the verification date above. Program terms change without notice, and several programs require pre-approval before installation.

Maine is the best natural experiment in American home heating. It has the highest share of oil-heated homes in the country, among the highest electricity prices, and the highest per-capita heat pump adoption. Those three facts look contradictory until you do the arithmetic.

The tiers

Efficiency Maine structures rebates by income, with a per-unit structure and a lifetime cap.

The standard tier pays roughly $500 to $1,000 per eligible outdoor unit. The moderate-income tier pays $1,000 to $2,000 per unit. The low-income tier pays up to $3,000 per unit, within a lifetime limit of $9,000 per housing unit.

That last structure is the one to understand. Because the cap is per housing unit rather than per unit installed, a whole-home conversion with multiple outdoor units can reach the full $9,000. A single-head installation will not. If you are planning a partial installation now and a full conversion later, the lifetime cap means the sequence matters.

What is paused

Maine opened its federal HEAR allocation and hit the reservation ceiling within weeks. New applications are waitlisted. This is not the same as the program being cancelled, and it is not the same as the money being gone forever, but for planning purposes in 2026 you should assume HEAR money in Maine is not available.

That matters because a lot of content online still advertises Maine’s combined incentive totals as if every program were open. If a page is telling you that you can stack $9,000 in Efficiency Maine rebates with $8,000 in HEAR money, that page is describing a funding environment that closed.

The oil arithmetic that makes Maine work

Maine’s residential electricity price is about 29.59 cents per kilowatt hour, which sounds disqualifying. But heating oil at roughly $3.62 a gallon burned at 82 percent efficiency costs about $40 per million BTU of delivered heat, while a cold-climate heat pump on Maine electricity costs around $22 for the same delivered heat.

That is a saving of roughly 45 percent on the largest energy line in the household budget. In a state with 7,826 heating degree days, that is a substantial annual number, and it is why the oil comparison is the strongest case in the country.

Sequencing a Maine project

Check the installer’s Efficiency Maine participant status first, because it determines eligibility. Confirm the rebate reservation before signing, since the program documentation requirements are enforced. Then decide whether you are doing a whole-home conversion or a staged one, because the lifetime cap rewards doing it in the right order.

If you are in the Portland area, the Portland market page covers the local housing stock and contractor landscape. For a specific number, run the calculator with your actual oil usage from a delivery slip.

Next steps

Confirm the reservation requirement first, because it is the single most expensive detail to get wrong. Then run the calculator, which applies only programs marked open in your state and will show you the after-rebate range alongside your modelled operating cost.

Check the heat pump cost guide if you want to sanity-check the installed band your contractor quotes, and the relevant comparison page if you are still deciding between fuels.

Ask Maine installers to price this job, not a different one

The range is already on this site, and the calculator will give you a ZIP-level number for free. What you do not have is a bid that uses the same scope. We send your ZIP and that range to installers who work the market, and we tell them to quote that job. You get the emails. You decide.

  • We attach the modeled range so the bid has to price that job, not a sales package
  • You also get a one-page brief you can hand to any contractor you found yourself
  • Phone is optional. No account. If nobody covers your ZIP yet, you still get the brief

Installers pay for the introduction in markets we cover. That is how the site is funded. Read the privacy policy and the money model.

Frequently asked questions

How much is the Efficiency Maine heat pump rebate in 2026?
Standard rebates run about $500 to $1,000 per eligible outdoor unit. Moderate-income households can receive $1,000 to $2,000 per unit, and low-income households up to $3,000 per unit within a lifetime cap of $9,000 per housing unit. The per-unit structure means a multi-unit installation can reach the cap, which is why whole-home conversions are the highest-value projects.
Is the Maine HEAR program still open?
No, not for new applications as of our last verification. Maine reached its initial reservation ceiling within weeks of opening and paused new applications while working through the queue. New applications are waitlisted and only funded if additional allocation becomes available. Do not plan a project around HEAR money in Maine right now.
Why does Maine pay so much for heat pumps?
Because Maine has the highest share of oil-heated homes in the country at roughly 56 percent, combined with a severe heating load and a state policy goal of reducing oil dependence. The economics of the conversion are strong enough that the state gets a real return on the incentive, and the program has been one of the most effective in the country at driving adoption.
Do I need to use an approved installer?
Yes. Efficiency Maine rebates require an approved participating installer and qualifying equipment. This is a meaningful consumer protection, because it means the contractor has been through the program and understands the documentation. Ask for the participant number before you sign.
Can I keep my oil system as backup and still get the rebate?
In many cases yes, and it is a common approach for a first winter. The program does distinguish between whole-home and partial installations and the rebate reflects that. A dual fuel arrangement can still qualify at a lower tier while giving you a hedge through the first heating season.
Is electricity in Maine too expensive for a heat pump to make sense?
No. Maine has among the highest residential electricity prices in the continental US at about 29.6 cents per kilowatt hour, and the heat pump still wins comfortably against oil. Oil is simply that expensive as a heating fuel. The conversion case in Maine is the strongest in the country by operating cost, which is why adoption is so high despite the power price.

Sources and data

Verified

Green dot marks a primary government, program or utility source. Grey dot marks a secondary benchmark or editorial reference. Our full method, including how modelled figures are produced, is on the methodology page.