A computer-based system, computer-implemented method and computer program product facilitate determining energy cost savings in an energy-consuming facility, such as a commercial building, using a neural network model that projects or estimates the amount of energy that would have been consumed by the facility but for the implementation of energy efficiency or conservation measures. Energy savings are represented by the difference between the estimate of energy that would have been consumed but for the measures and the actual amount of energy consumed by the facility under actual conditions during a time interval after the measures have been implemented.