LHCb Computing Resources: 2015 first estimates

This document presents the first estimates of LHCb computing resources for 2015. It follows on from the most recent estimates for the years 2012-14, presented in LHCb-PUB-2012-014, and presents a first scenario for the LHCb data-taking after the LS1 long shutdown of the LHC. Detailed estimates of event sizes and processing times are still to be worked out. The estimates presented here are based on the expected increment of the physics data rate due to the new running conditions.