The time it takes to complete a TEFL Course depends on a few different factors, including: the length of TEFL Course you’ve purchased, the Level of the TEFL Course you’ve purchased, the time you can commit to your studies on a daily/weekly basis and your own understanding of TEFL. As a general rule, Level 3 Courses take between 4-10 weeks to complete and Level 5 Courses take between 6-12 weeks to complete – but this time varies widely.