No the duration of cpl course is not the same everywhere. While many institutes aim for a timeline of 12-18 months for full CPL training including cpl training duration for ground school flying hours and medical/administrative steps several factors affect how quickly or slowly a student completes the course.
Training schedule & institute structure Some institutes offer integrated courses where ground theory and flying happen together others use modular format (separate phases). Integrated ones often reduce waiting times and overlap of stages.
Flying hours requirements & aircraft availability The duration of cpl course depends heavily on fulfilling DGCA mandated flying hours (around 200 hours), which include solo dual instrument cross country and night flying. If aircraft are busy or unavailable students might wait increasing the cpl duration.
Weather & geography Poor weather (monsoons fog low visibility) delays flying. Some locations have more days suitable for flying than others influencing total completion time.
Student progress & exam performance How quickly a student masters theory clears exams passes tests, and completes flight maneuvers affects the cpl training duration. Delays in exams or re attempts add extra time.
Medical & regulatory delays Obtaining DGCA approved Class 1 medicals ground exam clearing documentation delays here increase the overall cpl course duration.
Although many institutes report an expected cpl course duration of about 12 to 18 months the actual duration of cpl course can differ quite a bit from one institute to another. Aspiring pilots should check specific schedules aircraft fleet instructor availability and institute location to get a realistic idea of their cpl training duration.