All applicants must pay the SEVIS fee before going to the U.S. embassy or consulate for their visa interview. If you are changing your nonimmigration status to a student visa, this non-refundable fee payable to the United States Citizenship and Immigration Services (U.S.C.I.S.) for the processing of an initial I-20 (student visa for student/exchange visitor processing) applys as well.
Payment instructions and options are available online at www.fmjfee.com
You may visit the U.S. Customs and Immigration Enforcement website for official information regarding this fee.