The Immigration and Nationality Act provides a yearly minimum of 140,000 employment-based immigrant visas which are divided into five preference categories. They may require a labor certification from the U.S. Department of Labor (DOL), and the filing of a petition with United States Citizenship and Immigration Services in the Department of Homeland Security (USCIS).

The cost of each immigrant visa application processing fee (per person) is (US) $335. Fees must be paid for each intending immigrant, regardless of age, and are not refundable. Local currency equivalents are acceptable. Fees should not be sent to the consular office unless requested specifically. USCIS charges additional fees for filing petitions.