Optional Practical Training (OPT) is defined as temporary employment authorization directly related to an F-1 student's field of study.
OPT is authorized once an F-1 student has done both of the following: (1) studied in the U.S. for at least one year without changing the I-20, and (2) completed the program of study listed on the I-20. Students can apply for OPT beginning 90 days before the program of study end date or up to 60 days after the program of study end date.
Standard OPT is authorized for one calendar year, and students in STEM degrees may be eligible for a 24-month extension once the standard OPT year is completed.