The timeline to clear the ACCA course depends on how many exams the student has to give.
Since there are exemptions awarded based on the highest qualification the student holds, a student may get a maximum of 9 exemptions out of the 13 papers of the ACCA exam.
If someone starting his journey from Knowledge level and has to appear for 13 papers, he/she will take approx. 3 to 4 years to complete ACCA, while someone appearing directly for the Applied Skill Level may take 2 to 3 years and if someone only has to give 4 papers of the Strategic Professional Level they may complete the exams in 1 to 2 years.

Watch our You tube video below, to know more about the subjects and 13 papers of the ACCA exam!
https://www.youtube.com/watch?v=y3OJOEPuyOk&t=86s