USA F1 Student visas are generally valid for a period of 5 years including OPT (optional practical training).
During study program students can work only under certain conditions and in accordance with complex guidelines and restrictions issued by the United States Citizenship and Immigration Service (USCIS).
After meeting the guidelines and taking permission from the university where they are studying students are eligible to work for a maximum period of up to 20 hours per week during the academic year. Students can work full time (40 hrs) only during holidays. The average wage for part time jobs is between $10 and $12 per hour.
Students can opt for OPT which is related to their field of work. International students who have graduated from a university in USA are eligible to work full time for the remaining period of their visa in USA.