Every route we track for United States, with the official source behind each one.
The E-2 treaty investor classification lets a national of a country that holds a treaty of commerce and navigation with the United States (or a qualifying international agreement, or a country designated by legislation) come to the US to direct a business into which they have invested a substantial amount of capital.
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EB-5 is the United States' employment-based fifth-preference immigrant visa: an investor who puts the required capital into a new US commercial enterprise and creates ten permanent full-time jobs becomes a lawful permanent resident, together with a spouse and unmarried children under 21.
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EB-1A is the Extraordinary Ability track of the first-preference employment-based immigrant category, administered by USCIS under INA section 203(b)(1) and 8 CFR 204.5.
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EB-2 is the second-preference employment-based immigrant category (INA 203(b)(2), 8 CFR 204.5) for members of the professions holding an advanced degree or persons of exceptional ability.
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EB-3 is the third-preference employment-based immigrant category (INA 203(b)(3), 8 CFR 204.5, 20 CFR 656), open to skilled workers, professionals, and other (unskilled) workers.
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The F-1 is the United States' academic student visa, and Optional Practical Training is the work authorisation attached to it — together they are the most-used route by which a foreign graduate begins a US career.
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This is the United States' family-based permanent residence route for a husband or wife, and the single most important thing to understand about it is that it splits in two depending on whether the sponsoring spouse is a US citizen or a green card holder — the paperwork is nearly identical, the waiting time is not.
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The H-1B is the United States' primary nonimmigrant work visa for specialty occupations, governed by 8 CFR 214.2(h).
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The J-1 exchange visitor visa is the United States' sponsor-based route for work-and-study exchange, run by the Department of State's Bureau of Educational and Cultural Affairs under 22 CFR Part 62 rather than by USCIS.
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The K-1 fiancé(e) visa lets a United States citizen bring a foreign fiancé(e) — and their children under 21, who travel as K-2 — into the country in order to marry.
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The L-1 nonimmigrant classification, defined at INA 101(a)(44) and 8 CFR 214.2(l), lets a US employer transfer a qualifying employee from an affiliated foreign office to a US office of the same organization (or send an employee to establish a new US office).
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The L-1B is a United States non-immigrant classification, administered by USCIS under 8 CFR 214.2(l) and the L-1 Visa Reform Act of 2004, that lets a US employer transfer an employee with specialized knowledge from an affiliated foreign office to a US office — or lets a foreign company send such an employee to help …
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The O-1 nonimmigrant classification is a temporary work visa for individuals of extraordinary ability, defined at 8 CFR 214.2(o) and detailed in USCIS Policy Manual Volume 2, Part M.
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TN is the United States work classification created by the United States-Mexico-Canada Agreement (formerly NAFTA), and it is open to exactly two nationalities: Canadian and Mexican citizens.
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Schedule A, 20 CFR 656.5 — the occupations for which the Department of Labor has determined there are not enough United States workers. An employer filing for one of these may skip the individual labour-certification test and apply directly under 20 CFR 656.15. The list is very short and has not been substantively revised in decades.
Being on this list does not by itself make you eligible. Salary floors, qualification recognition and — on most routes — an employer still apply.
Electronic Code of Federal Regulations (US Department of Labor) · read 2026-08
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