Generally, for courses that are 10 months or longer, a visa is valid for two (2) months longer than the course. If the course runs for less than 10 months, a visa is valid for one (1) month longer than the course.
Postgraduate research students are provided an additional six (6) months so they can remain in Australia during the interactive marking of their thesis.
Generally, Student visas for primary school aged students are valid for three (3) years. Students who package primary and high school study together may have a visa granted for a period of five (5) years.