Employment-Based Visas: An Introduction

Employment-based immigration covers both temporary work visas and permanent employment-based green cards. The two tracks are related but distinct: a temporary visa lets someone work in the U.S. for a defined period tied to a specific employer or role, while an employment-based green card is a path to permanent residence.

Common temporary work visas

The H-1B is the best known — for "specialty occupations" typically requiring a bachelor's degree, subject to an annual lottery because demand exceeds the cap. The L-1 covers intracompany transfers for managers, executives, or employees with specialized knowledge moving to a U.S. office of the same company. The O-1 is for people with extraordinary ability in their field. Each has different eligibility rules, and most require the employer to sponsor the petition.

Employment-based green cards

These are organized into preference categories (EB-1 through EB-5), roughly ranked by the level of skill or investment involved, from extraordinary-ability individuals (EB-1) down to unskilled workers (EB-3) and investors (EB-5). Most categories require the employer to first test the U.S. labor market through a process called PERM labor certification, showing no qualified U.S. worker is available for the role, before petitioning for the employee.

The bottleneck: per-country limits

Even after a petition is approved, green card availability is capped both overall and per country of birth, which means applicants from countries with high demand — notably India and China in the employment-based categories — can face waits measured in years, sometimes far longer than applicants from other countries in the same category.