Transparency and Honesty in Energy Regulations Act of 2017

This bill prohibits the Department of Energy, the Environmental Protection Agency (EPA), the Department of the Interior, the Department of Transportation, and the Council on Environmental Quality from considering the social cost of carbon, methane, nitrous oxide, or greenhouse gas as part of any cost benefit analysis in the rule making process, unless a federal law is enacted authorizing such consideration. They may also consider those social costs if they use an estimate that: (1) complies with the requirements of the "Circular A-4" document of the Office of Management and Budget (OMB), (2) uses only the discount rates specified in that document, (3) considers only the domestic costs and benefits of the activity, and (4) has been reviewed by the OMB for compliance with the circular A-4 document and consistency across federal agencies.

The EPA must report on the number of proposed and final rulemakings, guidance documents, and agency actions since January 2009 that use those social costs, including as part of any cost benefit analysis required under Executive Order 12866 or other relevant authority.