Summary

Creates a temporary 10% tax credit for labor costs to install mechanical insulation on qualifying mechanical systems, aimed at encouraging energy-saving retrofits. The credit applies to labor (including offsite-assembled components) when the insulated system was placed in service at least one year earlier, meets minimum energy-efficiency reference standards, and reduces energy loss. The credit is treated as part of the general business credit and is paired with a rule that denies a tax deduction for the portion of labor costs equal to the credit. The incentive applies to amounts paid or incurred after December 31, 2025 and ends for amounts paid or incurred after December 31, 2028.

Key Points

• Establishes a 10% tax credit for labor costs to install mechanical insulation on qualifying mechanical systems.
• Eligible systems must have been placed in service at least one year before the insulation retrofit and be located in the U.S.
• Insulation must meet or comply with Reference Standard 90.1 and produce a measurable reduction in energy loss.
• Credit is part of the general business credit and denies a separate deduction for the same labor costs.
• Includes offsite-assembled mechanical insulation property when treated as labor costs.
• Applies to amounts paid or incurred after Dec 31, 2025 and terminates for amounts paid or incurred after Dec 31, 2028.
• Targets retrofits rather than new installations, encouraging energy-efficiency upgrades to existing mechanical systems.
• Requires documentation and likely additional recordkeeping to substantiate eligible labor costs and compliance with technical standards.

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