What is work authorization in the United States?

Employing or managing team members in the US comes with a non-negotiable responsibility: You must confirm that every employee has the legal right to work in the country. Missing this step or handling it incorrectly can lead to fines and disruptions, like delayed start dates or having to remove system access after someone has already started working.

This article explains what work authorization is, how people get authorized to work in the US, and how it shows up in recruitment scenarios. You’ll learn how to verify eligibility correctly, avoid common mistakes that create compliance risk, and manage the employment process with clarity.

What is work authorization?

Work authorization is the legal right to work in the US. It tells you whether a person can legally accept paid employment in the US, and which work authorization documents you must request during onboarding.

When teams get this wrong, costs can add up fast. Civil penalties for Form I-9 (Employment Eligibility Verification) paperwork violations range from $288 to $2,861 per violation, based on the adjusted 2025 penalty amounts.

Though work authorization requirements apply to everyone you employ, the rules vary for people who aren’t US citizens or lawful permanent residents. Some roles require employer sponsorship, while others depend on a work permit that must stay valid throughout employment. 

Work authorization is a federal requirement that helps you confirm eligibility correctly and keep hiring decisions consistent.

Who is eligible for work authorization?

Work authorization rules apply to every new hire you bring in. Some candidates already have authorization to work based on their status, while others need a specific immigration status or an approved authorization before they can start.

Employers must complete Form I-9 for each employee hired in the US, documenting they’ve verified both identity and employment authorization of the individual. “What type of work authorization do you have?” is a question employers often ask during recruitment to confirm a candidate is eligible to work in the US. Formal verification happens after hire through Form I-9, where the employee attests to their status and presents acceptable documents.

Here are the work authorization groups you’re likely to see. 

US citizens

US citizens are automatically authorized to work in the US, so they don’t need a separate work permit. In an I-9 process, they can prove eligibility with a combination of a state-issued ID and a Social Security card. 

As an employer, you still need to complete the verification steps like you would for any other hire.

US permanent residents

Lawful permanent residents, often called Green Card holders, can work in the US without needing any additional authorization. A Permanent Resident Card (Form I-551) is an acceptable document for proving work authorization during the I-9 process. You must document it and follow standard verification rules, including expiration dates when applicable.

Certain visa holders authorized for employment 

Some visa categories allow employment in the US when the individual meets the visa conditions, and in many cases, the employer must sponsor the role. Common examples include H-1B specialty occupations, L-1 intracompany transfers, and certain F-1 student work authorizations such as Optional Practical Training. 

Some visa categories don’t allow work at all, so a visa label alone doesn’t confirm eligibility. For example, B-1/B-2 visitors can’t accept employment, and J-1 exchange visitors can work only within the limits of their approved program.

Noncitizens with valid work authorization

Many noncitizens can work in the US only if they have specific authorization. The most common proof is an Employment Authorization Document (EAD), which US Citizenship and Immigration Services (USCIS) issues for a set time period. Candidates need to apply for an EAD through Form I-765 when their immigration status does not automatically grant work authorization.

Types of work authorizations in the US

Different types of work authorization affect what you verify during onboarding and what needs monitoring. Some authorization is ongoing, while other types expire or depend on an approved petition or set of conditions. 

Here are the types of work authorization in the US that you should be familiar with.

Automatic employment authorization for citizens and permanent residents

Some work authorization comes directly from a person’s status, so there’s no separate work authorization card to apply for. However, during onboarding, you still need to complete Form I-9 and keep a record of acceptable documents the employee presents to verify their work authorization.

Always determine work eligibility based on the individual’s current status and valid documentation, rather than making assumptions based on nationality or role. 

Employment Authorization Document (EAD)

An EAD is a work authorization card issued by USCIS. It usually comes with an expiration date and is linked to an eligibility category, so you need to track validity over time.

Employment-authorized visa categories

Some nonimmigrant visa categories allow employment, but the authorization often connects to the approved petition details. For example, H-1B, L-1, and O-1 employees generally work in specific roles for the employer tied to their filing, so changes like a new employer require a new petition. If the employer changes, the role materially changes, or the petition terms no longer match the job, the candidate may need to file a new petition before continuing work.

Conditional or limited work permission tied to visa status

Some visas allow employment only under specific conditions tied to the employer, the role, the worksite, hours, or program rules. For example, a person may be authorized to work only for the sponsoring employers, only in the approved job title, or only at the listed work location. A visa category alone doesn’t confirm what work is permitted. Confirm eligibility using current documentation and approval terms.

Status-based work permission

Some individuals can apply for work authorization while their immigration application is pending, and an approved EAD can allow them to work during that time. This is common for categories such as pending asylum cases or adjustment of status applications. You must have a clear process for tracking EAD expiration dates and renewals.

Stay compliant when hiring globally with Oyster

Getting work authorization right keeps your hiring compliant and predictable. You verify eligibility correctly, and you move through onboarding with fewer surprises. This clarity matters even more when you hire internationally, where employment rules vary by country and compliance risks increase.

Hiring through Oyster’s Employer of Record (EOR) services gives you the freedom to expand globally without navigating complex local regulation yourself. Oyster acts as the legal employer for your team members, managing payroll, benefits, and compliance obligations in each location, while you focus on day-to-day collaboration. 

If a hire or transfer involves immigration steps, Oyster can support visa sponsorship and work permit processes through Talent Mobility for eligible countries. Explore Oyster’s EOR and Talent Mobility solutions today to hire global talent confidently.