Designed to be a high luminosity, high energy linear collider, CLIC will inevitably need high power. Compared to an accelerator using superconducting technology, CLIC nevertheless has very low power consumption in stand-by or “waiting-for-beam” mode. A preliminary analysis of the overall CLIC energy consumption per year for the various stages shows that the first stage of CLIC would be similar to LHC, and the second stage similar to the total CERN energy consumption. However, work is on-going in several domains (overall re-baselining, permanent magnets, air-handling etc.) to further reduce the anticipated power consumption of CLIC.