On-Campus Employment: F-1 status students are generally permitted to work on campus part time at the school that issued his/her Form I-20 (20 hours per week while school is in session; can be full time during official school breaks.) For initial entry, on-campus employment can begin no sooner than 30 days before classes start. On-campus employment is “incident to status” and does not require authorization by the U.S. Customs and Immigration Service (USCIS).
A student may be authorized for off-campus employment under the following circumstances:
Must have been in F-1 status for at least one full academic year.
Must prove to USCIS that employment is necessary due to severe economic hardship caused by circumstances beyond his/her control that arose after obtaining F-1 status.