One of the challenges that Human Resource managers in small and medium-sized businesses (SMBs) have is analyzing leadership practices. This research inquired how frequently the managers of the SMBs in the State of Tamaulipas, Mexico used leadership. The study analyzed five behaviors included in the Inventory of Leadership Practices (ILP). A questionnaire adapted into Spanish from the original English version of the ILP was applied to a sample of 98 managers and the results were submitted to reliability testing. Results indicate that the behavior “inspires a shared vision” is frequently practiced and that the behavior “defies the processes” is rarely employed. It was also observed that the number of subordinates and the type of company influence the managers’ leadership practices.