OBJECTIVE To determine whether there is a relationship between carotid artery stenosis percentage and complications. METHODS The study included 109 patients treated with carotid artery stenting in our center. The indication for stenting was accepted as carotid artery stenosis above 50% in symptomatic patients and over 70% in asymptomatic patients. Complications were compared between groups with <90% and ≥90% stenosis. RESULTS There was no procedure-related mortality in any of the patients. Minor complications developed in 22 patients (20.2%). Prolonged hypotension/bradycardia occurred in 17 patients (77.3%), and a transient ischemic attack in five (22.7%). Inguinal access complications were detected in three patients (2.7%). Major complications developed in 11 patients (10%), of whom five (45.4%) had hyperperfusion syndrome, five (45.4%) had microinfarcts, and one (9%) had acute stent thrombosis. No significant difference was observed in age, gender, major and minor complications, or inguinal access site complications between the patients with <90% and ≥90% stenosis. There was also no statistically significant difference in complications according to the open or closed cell morphology of the selected stent. CONCLUSIONS The most important result of our study is that there was no significant difference in complications between the patients who underwent carotid stenting due to <90% and ≥90% stenosis.