The purpose of this study is to examine how tellers implement Standard Operating Procedures (SOPs) in cash deposit and withdrawal transactions at branch offices. The results show that tellers have consistently implemented SOPs under normal operating conditions, especially in key stages such as customer identity verification and signature matching. This study used a descriptive qualitative approach with data collection techniques such as observation, interviews, and SOP documentation. However, administrative consistency and service communication were still lacking during long queues and high transaction volumes. This study shows that, in essence, the implementation of teller SOPs has been going well; however, to maintain full compliance with SOPs, workload management, an ideal queuing system, and improved supervision and training are needed.