Nonimmigrant visa applicants from certain countries/areas of authority may be required to pay a visa issuance fee after their application is approved. These fees are based on the principle of reciprocity: when a foreign government imposes fees on U.S. citizens for certain types of visas, the United States will impose a reciprocal fee on citizens of that country/area of authority for similar types of visas.
For 2018 Reciprocity Updates click here.