Usability evaluations are relevant to know the Usability of a software product. However, it is becoming increasingly important to obtain quantitative information that can be measured, and therefore be compared and be classified. In the ATM domain, not only there is very little literature on proposed methods, but in general very little information on usability benchmarking between ATM applications. In that sense, we propose a Usability Evaluation Process for ATM interfaces. This process allows, through an ordered set of stages, a set of artifacts, techniques and a checklist, to carry out a Usability Evaluation and to obtain both qualitative and quantitative information on the usability level of the interfaces of an ATM application, and to be able to make comparisons and benchmarking. Likewise, one of the proposed artifacts is a questionnaire of relevant aspects in the ATM domain. This process has been validated by usability experts and ATM domain experts. Finally, further validations are expected by applying this proposal in real measurement cases.