This report briefly describes studies performed in the framework of the Collimation Task Force organized to support the work of the second International Linear Collider Technical Review Committee. The post‐linac beam‐collimation systems in the TESLA, JLC/NLC and CLIC linear‐collider designs are compared using the same computer code under the same assumptions. Their performance is quantified in terms of beam‐halo and synchrotron‐radiation collimation efficiency. The performance of the current designs varies across projects, and does not always meet the original design goals. But these comparisons suggest that achieving the required performance in a future linear collider is feasible. Further work of the group is briefly described as well. © 2003 American Institute of Physics