U.S. visa types at a glance

For husbands and wives of U.S. citizens. An immediate-relative category, so no annual cap applies.

For unmarried children under 21, and for parents of U.S. citizens who are 21 or older.

For other relatives, such as adult children and siblings of citizens, or spouses and children of green card holders. Subject to annual limits.

For people with extraordinary ability, outstanding professors and researchers, and certain multinational managers.

For advanced-degree professionals, people of exceptional ability and skilled workers, usually with an employer sponsor.

For investors who put qualifying capital into a U.S. business that creates jobs for U.S. workers.

An annual lottery for people from countries with historically low rates of immigration to the United States.

Lets a fiancé(e) enter the U.S. to marry within 90 days and then apply for a green card.

For short business trips, tourism, family visits or medical treatment. Some nationalities can use ESTA instead.

For full-time academic (F-1) or vocational (M-1) study at a school approved to enrol international students.

For approved exchange programmes, including researchers, interns, au pairs and visiting scholars.

For roles that require at least a bachelor's degree, sponsored by a U.S. employer. Subject to an annual cap for most employers.

For managers, executives and specialised staff moving to a U.S. office of the same company.

For people with sustained national or international acclaim in sciences, arts, education, business or athletics.

For Canadian and Mexican citizens in certain listed professions working for a U.S. employer.

For nationals of treaty countries who invest a substantial amount in a U.S. business they will direct.