Jerome L. Garciano of Robinson+Cole has updated his Green Tax Incentive Compendium which includes information about incentives in the USA for geothermal projects. The July 2018 version includes recent extensions of the investment tax credit for certain technologies, the 45L tax credit and the 179D tax deduction..The volume presents certain U.S. federal and state tax incentives promoting the renewable energy and energy efficiency industries. Each section outlines the basic features and regulatory requirements for a tax program which provides financial incentives for clean technology development through renewable energy and energy efficiency projects.
Green Tax Incentive Compendium: Federal and State Tax Incentives for Renewable Energy and Energy Efficiency (PDF)