How to Know if You Are Legally Eligible to Work in the U.S.

In the United States, legal eligibility to work depends on a person’s citizenship or immigration status and, for some noncitizens, a specific work authorization document or employer-sponsored status. The hiring process also includes Form I-9, which verifies identity and authorization to work. Knowing the difference between being eligible to work and proving eligibility to an employer can help prevent delays and avoid common mistakes.

What “Legally Eligible to Work” Means

A person is legally eligible to work in the U.S. when federal immigration law allows that person to perform the job. Some people have broad authorization to work for nearly any employer; others can work only under specific conditions, such as for a named employer, in a particular occupation, or during a limited period.

Work authorization is not the same thing as having a Social Security number, a job offer, or permission to be physically present in the country. A Social Security number is used for tax and employment reporting, but it does not by itself establish immigration-based authorization. Likewise, some immigration statuses allow a person to live in the U.S. without automatically permitting employment.

For most employees, employers confirm identity and work authorization through Form I-9. The employee attests to eligibility, and the employer examines acceptable documentation. Federal law generally requires employers to complete this process for each new hire, regardless of citizenship or national origin.

Who Can Generally Work in the United States?

Several groups are generally authorized to work without first obtaining an Employment Authorization Document (EAD), though documentation and individual circumstances still matter.

• U.S. citizens: Citizens can generally work for any U.S. employer, subject to ordinary job requirements and any role-specific legal restrictions.
• U.S. noncitizen nationals: Noncitizen nationals, including certain people born in American Samoa or Swains Island, are generally authorized to work in the United States.
• Lawful permanent residents: Green card holders are generally authorized to work for any employer. They may usually present a Permanent Resident Card as a Form I-9 document.
• People with temporary work authorization: Some noncitizens can work because of an employment-based immigration status, an EAD, or another authorization granted under immigration law.

These categories do not mean every job is open to every person. Certain government positions, security-sensitive work, professional licenses, or regulated occupations may have separate citizenship, clearance, credential, or background-check requirements.

How Noncitizens May Be Authorized to Work

Noncitizens may be eligible to work through different immigration pathways. The exact rules depend on the person’s status, the type of job, and sometimes the employer. An approval notice, visa stamp, or immigration document should not be assumed to authorize employment unless the applicable rules say it does.

Employment-based status

Some nonimmigrant classifications allow employment for a sponsoring employer. Examples include H-1B, L-1, O-1, and certain other employment-related categories. These statuses commonly carry limits on the employer, position, work location, or authorized dates. A worker may need an amended petition or another approval before changing jobs or materially changing employment terms.

A visa in a passport is generally used to request admission to the United States; it is not, by itself, a complete description of a person’s current work authorization. The status and authorized stay shown in the person’s immigration records, including the I-94 admission record where applicable, are important. Workers should check the conditions attached to their particular status before starting a job.

Employment Authorization Document

USCIS issues an Employment Authorization Document, commonly called an EAD or work permit, to certain noncitizens who qualify under specific immigration categories. An unexpired EAD generally serves as evidence of employment authorization during its validity, subject to any applicable category restrictions. Some applicants may qualify for an automatic extension when renewing an EAD, but eligibility and extension periods depend on current rules and the card category.

An EAD does not grant immigration status by itself. It is evidence of permission to work under a particular basis, and it usually has an expiration date. A pending immigration application does not automatically authorize employment; the applicant must qualify for work authorization under the relevant rules.

Student employment

F-1 students may work in certain circumstances, but student status does not provide unrestricted permission to take any job. On-campus employment is subject to program and regulatory limits. Off-campus employment may require authorization such as Curricular Practical Training (CPT), Optional Practical Training (OPT), or a separate approval based on qualifying circumstances.

For CPT, the school’s Designated School Official (DSO) must authorize the training in the student’s SEVIS record and on the Form I-20 before the student begins. OPT generally requires an EAD before employment starts. Students should consult their DSO and follow the dates and conditions on their authorization; working outside those conditions can jeopardize immigration status.

Other immigration categories

Some refugees, asylees, and other individuals may be authorized to work based on their status or may apply for an EAD. Rules differ by category, and a person’s documents and case history can affect the answer. Deferred Action for Childhood Arrivals (DACA), for example, is not lawful immigration status, but a person with a valid EAD issued through DACA may work while that authorization remains valid. Because policies and litigation can change, current USCIS guidance matters.

How Form I-9 Verifies Employment Eligibility

Form I-9 is the standard federal employment eligibility verification form for most U.S. hires. It is completed after a job offer is accepted, not as a general pre-employment screening tool. The employee completes Section 1 no later than the first day of employment, and the employer generally completes Section 2 within three business days after the employee begins work for pay.

Employees choose which acceptable documents to present from the form’s Lists of Acceptable Documents. They may present either one document from List A, which establishes both identity and work authorization, or one document from List B plus one from List C, which together establish identity and authorization. Employers generally cannot insist on a particular document or ask for extra documents because a worker is, or appears to be, a noncitizen.

Examples of commonly used documents include a U.S. passport (List A), a state driver’s license or ID (List B), and an unrestricted Social Security card (List C). The Social Security card must not have a work-restricting legend to qualify for List C. The current Form I-9 instructions contain the full list, including rules for receipts and certain temporary documents.

Employees generally have the right to choose among acceptable documents. An employer may not reject a valid document that reasonably appears genuine and relates to the person presenting it, or demand a green card from someone who is authorized to work using another acceptable document. Employers must follow the same verification rules consistently and avoid discrimination based on citizenship status or national origin.

What E-Verify Does—and Does Not Do

E-Verify is an online system that participating employers use to compare information from Form I-9 with records held by the Department of Homeland Security and the Social Security Administration. It is required for some employers and contracts, while other employers may use it voluntarily, subject to applicable rules. E-Verify is not a substitute for Form I-9, and it does not change a worker’s underlying immigration status.

If the system returns a Tentative Nonconfirmation (also called a mismatch), that result does not by itself mean the worker is unauthorized. The employer must provide notice and instructions, and the worker must have an opportunity to take action to resolve the mismatch. Employers generally may not take prohibited adverse action—such as firing or delaying work—while a case is being contested within the required process.

Common Signs That More Checking Is Needed

It may be important to verify work authorization before accepting or beginning a job if any of the following applies:

• A work permit, visa-related authorization, or other employment document has expired or will expire soon.
• The authorization names a particular employer, school program, occupation, or work location.
• A person plans to change employers while in a status tied to a sponsoring employer.
• A student plans to work off campus or outside the dates and conditions listed on their authorization.
• An immigration application is pending, but the person has not received a separate work authorization or confirmed that another rule permits employment.
• A person has received a mismatch notice in E-Verify or a request for updated Form I-9 documents.

Work authorization rules can be complicated, and a document that was valid in one situation may not authorize a different job or period of employment. Workers should not rely solely on an employer’s assumptions or on informal advice from friends or online forums.

Practical Steps to Confirm Eligibility

1. Identify the basis for authorization. Determine whether eligibility comes from citizenship, permanent residence, a specific immigration status, an EAD, or another rule.
2. Check restrictions and dates. Review the expiration date and any employer, occupation, school, or location limitations. Confirm that authorization covers the planned start date.
3. Review the current Form I-9 list. Choose acceptable documents that meet the form’s requirements. Do not assume a Social Security number alone is sufficient.
4. Ask the appropriate official. Students can contact their DSO; people with employer-sponsored status can consult their employer’s immigration counsel; others may need advice from a qualified immigration attorney or DOJ-accredited representative.
5. Use official sources. Check current USCIS instructions and forms, Department of Justice guidance on workplace discrimination, and the Department of Homeland Security’s E-Verify resources.

Where to Get Reliable Help

USCIS provides information about employment authorization, EAD applications, immigration categories, and Form I-9 at uscis.gov/working-in-the-united-states. The current I-9 form and its document list are available at uscis.gov/i-9. E-Verify resources are available at e-verify.gov.

For questions about discrimination during hiring or document checks, the Department of Justice’s Immigrant and Employee Rights Section offers information and assistance at justice.gov/crt/immigrant-and-employee-rights-section. Individual cases may require legal advice, especially when a person’s status, work history, or application is uncertain. A licensed immigration attorney or DOJ-accredited representative can assess the specific facts.