This guidebook provides an overview of the clean energy, climate mitigation and resilience, agriculture, and conservation-related tax incentives and investment programs in President Biden’s Inflation Reduction Act, including who is eligible to apply for funding and for what activities. The guidebook groups the Inflation Reduction Act’s tax incentives and investment programs into thematic chapters and explains how the law will deliver on the President’s commitments to the American people. Each chapter outlines the significance of these programs and includes a one-page summary of each program’s eligible uses, potential beneficiaries, and other important information. As these programs develop, more detail will come in the weeks and months ahead.