Section 179D Deduction Estimator (2026)

Estimate the IRA §179D energy-efficient building deduction an RTU project may qualify for.

Building conditioned area (sq ft) Prevailing-wage and apprenticeship compliance

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potential 2026 deduction

Rate applied —

Conditioned area —

Low-high estimate —

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Indicative only. The 2026 maximum ($5.94/sqft, inflation-indexed) requires prevailing-wage and apprenticeship compliance and a qualifying energy-reduction model. Eligibility and amounts vary by project — confirm with a qualified tax professional. Sources: IRS §179D; DOE.

Section 179D Deduction Estimator (2026)

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