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The U.S. Department of Energy’s (DOE) Oak Ridge National Laboratory performs annual assessments of the realization rate of energy and cost savings from DOE’s energy savings performance contract (ESPC) program and publishes the findings in annual performance reports. These documents are based on the information reported by energy service companies carrying out ESPC projects at federal sites.

The most recent report indicates that on average:

  • ESPC contractors guaranteed 92% of the estimated cost savings
  • Projects reported achieving 99% of the estimated cost savings
  • Projects reported achieving 108% of the guaranteed cost savings.

Annual Reports and Supplemental Data

For more information, read annual performance reports since 2010. Supplemental data for these reports are also available.