California's economy — its technology companies, its vast agriculture, and its entertainment industry — draws talented workers from around the world, and many of them need a visa or green card to work here legally. Employment-based immigration is entirely a matter of federal law, but the demand is concentrated in California more than almost anywhere else. This guide explains, in plain English, the main temporary (nonimmigrant) work visas, the labor-certification process, and the permanent employment-based green-card categories, so workers and employers in California can understand the landscape before they begin.

This guide provides general information about federal immigration law and is not legal advice. Immigration rules, quotas, and fees change frequently, and employment cases involve both the worker and the employer. For advice you can rely on, consult a qualified immigration attorney. Many immigration attorneys are licensed by the State Bar of California, though immigration practice is federal.

Temporary (nonimmigrant) work visas

Nonimmigrant visas allow a person to work in the United States for a temporary period, usually tied to a specific employer or purpose. The most common include:

  • H-1B — for "specialty occupation" jobs that normally require at least a bachelor's degree in a specific field. H-1B is heavily used by California's technology sector and is subject to an annual cap with a lottery in most years. It allows "dual intent," meaning the worker may also pursue a green card.
  • L-1 — for intracompany transferees: managers, executives (L-1A), or employees with specialized knowledge (L-1B) moving from a foreign office to a related U.S. office. L-1 also allows dual intent.
  • O-1 — for individuals of extraordinary ability or achievement in the sciences, arts, education, business, or athletics — widely used in California's entertainment and tech industries.
  • TN — for certain Canadian and Mexican professionals under the United States–Mexico–Canada Agreement (USMCA), in listed professions.
  • E-1 / E-2 — treaty trader (E-1) and treaty investor (E-2) visas for nationals of countries with a qualifying treaty with the United States, for those engaged in substantial trade or who have invested substantial capital in a U.S. business.

Each visa has its own eligibility rules, duration, and limits, and some (like H-1B) face annual numerical caps. Choosing the right category depends on the worker's qualifications, the employer's structure, and the long-term plan.

From temporary visa to a green card

A temporary work visa is not permanent residence. Many workers ultimately seek a green card through an employment-based category. Workers on "dual intent" visas like H-1B and L-1 can pursue a green card while in the United States; workers on visas that do not allow dual intent must be more careful about showing immigrant intent. The path from a temporary visa to a green card often involves the employer, a labor certification, and a multi-step filing process that can take years.

PERM labor certification

For most employment-based green cards in the EB-2 and EB-3 categories, the employer must first obtain a PERM labor certification from the U.S. Department of Labor. PERM requires the employer to test the U.S. labor market — obtaining a prevailing wage determination and conducting recruitment — to show that there are not enough able, willing, qualified, and available U.S. workers for the position and that hiring the foreign worker will not adversely affect the wages and working conditions of similar U.S. workers. PERM does not apply to every category: EB-1 does not require it, and the EB-2 National Interest Waiver (NIW) lets a worker skip both PERM and an employer sponsor in qualifying cases. PERM can take many months, so employers and workers should plan for the timeline.

The employment-based green-card categories: EB-1 through EB-5

Permanent employment-based immigration is organized into five preference categories:

  • EB-1 — first preference: people of extraordinary ability, outstanding professors and researchers, and certain multinational executives and managers. No PERM required.
  • EB-2 — second preference: professionals holding advanced degrees, or people of exceptional ability. Generally requires PERM, unless the worker qualifies for a National Interest Waiver.
  • EB-3 — third preference: skilled workers, professionals, and certain other workers. Requires PERM.
  • EB-4 — fourth preference: certain "special immigrants," such as some religious workers.
  • EB-5 — fifth preference: immigrant investors who invest the required capital in a U.S. enterprise and create the required number of jobs.

Like family categories, employment categories are subject to annual numerical limits and per-country caps, so applicants from high-demand countries may face long waits tracked by the monthly Visa Bulletin.

California's outsized demand

No discussion of employment immigration is complete without noting California's role. The state's technology companies are among the largest users of H-1B and EB-2/EB-3 sponsorship; its agriculture relies heavily on seasonal and other labor programs; and its entertainment industry frequently uses O-1 and related visas for performers, directors, and other extraordinary-ability individuals. This concentration means California workers and employers encounter employment immigration constantly — and that experienced counsel is widely available.

Understanding "dual intent" and immigrant intent

A concept that confuses many workers is immigrant intent. Most nonimmigrant visas require the applicant to intend a temporary stay; showing an intent to settle permanently can lead a consular officer or inspector to deny a visa or entry. A handful of categories — most notably H-1B and L-1 — are "dual intent," meaning the holder may lawfully pursue a green card without undermining their temporary status. Workers in categories that do not allow dual intent, such as certain visitor or student situations, must be more careful: taking concrete steps toward permanent residence can create problems at a visa interview or at the border. This is one reason the choice of temporary visa is not just about getting in the door today; it can shape whether and how smoothly a person can transition to a green card later. A worker who knows from the start that they hope to stay permanently should weigh dual-intent categories more heavily.

Premium processing and timelines

For many petitions, USCIS offers premium processing for an additional fee, which guarantees a faster decision — often within about 15 business days — on the petition itself. Premium processing can be a major help for H-1B, L-1, O-1, and I-140 cases when timing is tight, such as when a start date is approaching or a worker's current status is expiring. It is important to understand, however, what premium processing does and does not do: it speeds the agency's decision on the petition, but it does not shorten the PERM labor-certification process at the Department of Labor, and it does not create a visa number where the annual cap or the Visa Bulletin backlog stands in the way. In other words, premium processing can accelerate a step, but it cannot move you ahead in a line that is governed by numerical limits. Planning realistically around each stage — PERM, the petition, the visa number, and the final green-card step — is the best way to avoid gaps in status.

Choosing the right temporary visa

Because the nonimmigrant categories overlap in some ways, picking the right one matters. The H-1B is the workhorse for degreed professional roles, but its annual cap and lottery make timing unpredictable, and it ties the worker to a sponsoring employer and an approved job. The L-1 avoids the lottery but requires a genuine qualifying relationship between a foreign and a U.S. employer and prior employment abroad. The O-1 demands strong evidence of national or international acclaim, which suits established researchers, artists, and entrepreneurs but is a high bar. The TN is fast and renewable for qualifying Canadian and Mexican professionals, but it is limited to listed occupations and does not formally allow immigrant intent. The E-1/E-2 categories depend on the worker's nationality matching a qualifying treaty country and on real trade or investment. A good first conversation with an immigration attorney often centers on matching the worker's background and the employer's situation to the category that is both achievable and consistent with long-term goals.

Maintaining status and avoiding pitfalls

Holding a work visa comes with ongoing responsibilities. A worker must generally keep working for the sponsoring employer in the approved role, file extensions before the authorized stay expires, and update petitions when a material change occurs — such as a significant change in job duties, worksite, or employer. Gaps in authorized status, unauthorized employment, or letting a visa lapse can jeopardize both the current status and a future green card. For employers, the obligations include paying the required wage, maintaining a public access file for certain categories, and complying with the terms certified to the government. Many problems in employment immigration arise not from the initial approval but from changes that happen afterward — a layoff, a promotion, a move to a new office — that were never reported. Building a habit of checking with counsel before such changes protects both the worker and the company.

Key laws, forms, and the process

Employment immigration runs on the federal Immigration and Nationality Act, with the Department of Labor handling PERM and USCIS adjudicating petitions. Core forms include:

  • Form I-129 — Petition for a Nonimmigrant Worker (used for H-1B, L-1, O-1, and others).
  • ETA Form 9089 — the PERM labor certification application filed with the Department of Labor.
  • Form I-140 — Immigrant Petition for Alien Worker (the employment green-card petition; premium processing is available for faster adjudication in many cases).
  • Form I-485 — Application to Adjust Status, for the final green-card step inside the United States; or consular processing abroad.

Fees and rules change, so always confirm current amounts and the correct form editions on the USCIS and Department of Labor websites before filing.

Step-by-step: a typical employer-sponsored green card

  1. Confirm eligibility and category. Identify whether the worker fits EB-1, EB-2 (with or without a National Interest Waiver), EB-3, or another category.
  2. Obtain PERM (if required). The employer gets a prevailing wage determination, recruits for the position, and files the PERM application with the Department of Labor.
  3. File Form I-140. Once PERM is certified (or if PERM is not required), the employer files the immigrant petition; the priority date is set.
  4. Wait for a visa number. Track the priority date against the Visa Bulletin if the category is backlogged.
  5. Adjust status or consular process. File Form I-485 inside the U.S., or complete consular processing abroad.
  6. Attend biometrics and any interview. Complete the final steps and receive the green card if approved.

Family members of work-visa holders

Most temporary work visas allow the worker's spouse and children to come to the United States in a dependent category — for example, H-4 dependents of H-1B workers, or L-2 dependents of L-1 workers. Some dependents may be eligible to apply for their own work authorization, while others may not, depending on the category and current rules. When a worker eventually obtains an employment-based green card, the spouse and unmarried children under 21 can generally immigrate as derivatives on the same petition, which is one of the major advantages of the permanent path over a temporary visa. Because dependent rules and work-authorization eligibility change, families should confirm the current options for their specific category, especially when both spouses hope to work.

Frequently asked questions

What is the difference between a work visa and an employment green card?

A work visa (like H-1B or L-1) is temporary and usually tied to a specific employer and purpose. An employment-based green card makes you a lawful permanent resident, allowing you to live and work in the United States indefinitely. Many workers start on a temporary visa and later pursue a green card.

Does every employment green card require PERM labor certification?

No. EB-1 does not require PERM, and the EB-2 National Interest Waiver lets qualifying applicants skip both PERM and an employer sponsor. EB-2 (standard) and EB-3 generally do require PERM. The right approach depends on the worker's qualifications.

Can I change employers while my green card is in process?

Sometimes, under "portability" rules, particularly after a pending adjustment of status has been on file long enough and the new job is in the same or a similar occupation. The rules are technical, and timing matters, so consult an attorney before changing jobs mid-process.

How long does an employment-based green card take?

It varies widely. PERM and the petition can take many months each, and applicants from high-demand countries may then wait years for a visa number under the per-country caps. Premium processing can speed up certain steps but does not change the Visa Bulletin wait.

Can a startup or small California employer sponsor a worker?

Yes, employers of many sizes sponsor workers, but they must be able to meet the legal requirements, including the ability to pay the required wage and, for PERM cases, to conduct a genuine recruitment. Smaller employers often work closely with immigration counsel to do it correctly.

Costs, employers, and who pays

Employment immigration involves a layered set of government fees — for the nonimmigrant petition, for PERM-related steps, for the immigrant petition, and for the final green-card application — and the rules about which costs the employer must bear versus which the worker may pay are specific to each step. For PERM, for example, the law requires the employer to pay the costs of the labor-certification process and prohibits passing those costs to the worker. For other steps, the allocation can differ. Premium processing, when used, carries its own additional fee. Because fees change and the cost-allocation rules are technical, both workers and employers benefit from a clear written understanding at the outset of who is responsible for each expense, ideally reviewed by immigration counsel. Always confirm the current fee amounts on the USCIS and Department of Labor websites, since they are updated periodically and an outdated payment can delay a case.

Get help with your work visa or green card

Employment immigration involves both you and your employer, strict labor-certification steps, and long visa-number waits — details that reward careful planning. For the full picture, see the immigration hero guide, and if a family member may also sponsor you, compare our guide to family-based green cards in California. Our directory lists attorneys licensed by the State Bar of California across all 58 counties — free to search, no obligation — so you can find a lawyer who handles employment immigration matters like yours.