Federal Heat Pump Tax Credit: Maine Homeowner Guidance

The Federal 25C Tax Credit (Inflation Reduction Act)

The IRS Energy Efficient Home Improvement Credit guidance states that qualifying improvements were eligible through December 31, 2025. The former Section 25C benefit should not be advertised as available for new 2026 installations.

Keep project documentation and ask a tax professional which current requirements, eligible-product criteria, filing forms, and timing apply to you. We do not provide tax advice.

Efficiency Maine Rebates

Efficiency Maine incentives may be available for qualifying work. Program eligibility, amounts, documentation, and processing timelines can change.

Visit our rebates page for guidance, then confirm the current program directly with Efficiency Maine before relying on an incentive in your budget.

Can You Stack Both?

For new 2026 work, do not assume there is a federal 25C credit to combine with a Maine rebate. For qualifying work completed in an eligible prior year, the treatment of rebates and eligible expenses depends on the rules for that tax year.

Confirm the current treatment of rebates, eligible costs, and filing requirements with the IRS or a qualified tax professional; do not assume an online example applies to your return.

For a project-specific picture, obtain an installation estimate and verify each available program before calculating a budget.

What Qualifies

Not all equipment or projects qualify. Ask for the exact proposed model information, then verify current eligibility criteria with the relevant official source.

Heat Pump Water Heaters: Separate Tax History and Current Rebates

The federal 25C end date also matters for heat-pump water heaters. Check eligible prior-year installations with a tax professional, and verify any current Efficiency Maine water-heater program independently before purchase.

Ask for a project-specific heat-pump and water-heater estimate, then verify eligibility and documentation directly with each applicable program.