Immigration · Jobs & the law
Immigration Rules for Employers
How immigrants are hired, when a business needs to sponsor a worker, and why people without work authorization still appear in the workforce.
Federal overview · Reviewed October 15, 2026. State requirements and individual immigration cases can differ. This is an educational guide, not advice for a particular case.
First: immigration status and work permission are different
“Immigrant” does not mean “undocumented,” and “noncitizen” does not mean “unable to work.” Many immigrants already have permission to work and can be hired without a new employer-sponsored visa.
Immigration status
The legal category under which someone is in the country. Having permission to be here does not always include permission to take a job.
Employment authorization
Permission to work. It may come with a person’s status, be limited to a particular employer, or be granted through an Employment Authorization Document (EAD).
| Worker’s situation | General work rule | What the employer needs to understand |
|---|---|---|
| Lawful permanent resident (green-card holder) | Generally may work for any employer. | A new employer usually does not need to sponsor an immigration petition. Some jobs have separate citizenship requirements. |
| Refugee or person granted asylum | Work permission comes with that status. | An EAD can document authorization, but is not the only acceptable proof. |
| Person with a valid EAD | May work within the terms of the authorization. | Check the applicable category, dates, and restrictions. An EAD is not a green card. |
| Temporary employment status | Often tied to a sponsoring employer and approved work. | A different job or employer may require a new filing or other authorization. |
| Student or visitor | Student work is limited to authorized arrangements; ordinary visitor status does not authorize U.S. employment. | Admission to the country alone is not permission to hire someone. |
| Pending immigration application | Filing an application alone generally does not grant work permission. | Some applicants, including eligible asylum applicants, can seek an EAD under category-specific rules and waiting periods. |
A person who lacks a regular lawful immigration status may nevertheless qualify for a particular work-authorization category. That is why a broad label like “undocumented” does not answer every hiring question. The relevant question is whether this person currently has authorization for this work.
Sources: USCIS: working in the United States; employment authorization documents; Form I-765 and eligibility categories; refugees and asylees (PDF).
How ordinary hiring and verification work
For someone already authorized for the job, hiring usually follows the ordinary application, interview, and offer process. Employers verify new employees’ identity and work authorization—including U.S. citizens—using Form I-9.
The worker accepts a job offer
The employer can generally ask whether an applicant is authorized to work and will need sponsorship. It should apply its questions consistently and follow anti-discrimination rules.
The employee completes Section 1
This is generally due no later than the first day of work for pay. It includes the employee’s information and attestation about work authorization.
The employer examines acceptable documents
Section 2 is generally due within three business days after the first day of work. For a job lasting fewer than three business days, verification is due on the first day.
The worker chooses acceptable documents: List A establishes both identity and work authorization, or List B plus List C establishes them separately. Documents must reasonably appear genuine and relate to the worker. Receipt and authorized remote-examination rules have specific conditions.
The employer keeps the form and follows up when required
I-9 is generally retained by the employer rather than routinely filed with USCIS. Time-limited work permission may require reverification. An expiring green card does not, by itself, require reverifying a permanent resident’s authorization.
What E-Verify adds
E-Verify compares I-9 information with government records. It supplements I-9; it does not replace it. Participation is voluntary for many employers, but some federal contracts and state laws require it.
A mismatch is not proof of unauthorized work
A tentative nonconfirmation can result from a record or data-entry problem. Employers must follow the resolution process and must not fire, suspend, reduce pay, or take other adverse action because of a mismatch while the worker is resolving it.
Sources: I-9 instructions (PDF); E-Verify overview (PDF); mismatch procedures; DOJ employer and employee FAQs.
When a business sponsors a worker
Sponsorship means pursuing a particular immigration category for a qualifying worker and job. It is not a general permission slip to hire anyone who wants work.
| Pathway | Typical purpose | Employer’s role |
|---|---|---|
| H-1B | Qualifying specialty occupations. | Meet job, worker, wage, and filing requirements. Many cases are subject to annual numerical limits and a selection process. |
| H-2A | Temporary or seasonal agricultural work. | Seek labor certification and petition approval; meet recruitment, pay, housing, and other program obligations. |
| H-2B | Qualifying temporary nonagricultural work. | Demonstrate temporary need, complete labor certification and petition requirements, and comply with applicable caps and worker protections. |
| L-1 | Qualifying transfers within related companies. | Establish the qualifying business relationship and the worker’s overseas employment and managerial, executive, or specialized-knowledge role. |
| Employment-based green card | Permanent residence through an eligible employment category. | Many cases require a permanent job offer, labor certification, and an immigrant petition. Some categories allow self-petitioning or waive labor certification. |
What the process usually involves
- Match the job and worker to an eligible category. A labor shortage alone does not create a visa category.
- Complete labor requirements where applicable. These can include recruitment and required wage commitments.
- File the appropriate petition or application. DOL certification and USCIS approval serve different purposes.
- Complete the worker’s immigration steps. A visa and admission, or an eligible change or adjustment of status, may be needed. Work begins only when the applicable authorization permits it.
Sources: State Department: temporary worker categories; DOL: foreign labor programs; USCIS: permanent workers.
How do people get work without authorization?
The existence of a hiring rule does not mean every hire complies with it. Unauthorized work can occur in several ways. These describe how the system operates; none automatically creates legal work permission.
Off-the-books or informal hiring
An employer may skip verification and payroll reporting, sometimes paying cash. Hiring may happen through personal referrals or informal arrangements. Cash itself is a lawful payment method; skipping required verification, taxes, or wage obligations is the problem.
False documents or identity misuse
Some workers present fraudulent documents or information belonging to another person. An employer may be deceived, or may knowingly participate. I-9 document review is not a guarantee that every fraud will be detected.
Work continues after authorization ends
Someone may have been eligible when hired but later lose authorization or work beyond its limits. A renewal application does not automatically extend permission in every category.
Contracting and self-employment
Work may be arranged through subcontractors, day-labor arrangements, or a person’s own business. Those labels do not settle whether the work is authorized or whether the person is actually an employee.
Is using a contractor a loophole?
A customer generally does not complete I-9 for a genuine independent contractor. A staffing company or contractor generally handles I-9 for its own employees. But federal law also prohibits using a contract or subcontract to obtain labor knowing the worker is unauthorized for that labor.
Calling an employee a “1099 contractor” does not make the classification valid. Forming an LLC, obtaining a business license, or receiving a tax number does not itself grant immigration work permission. Ownership and personally performing work are different questions.
Sources: GAO’s 2006 examination of unauthorized employment and document fraud (historical explanation, not a current estimate); USCIS: I-9 exceptions; 8 U.S.C. § 1324a(a)(4): labor through contracts; IRS: contractor classification; USCIS: work pathways for entrepreneurs.
What happens when the rules are broken?
For employers
- I-9 paperwork failures can lead to civil penalties, even apart from knowingly hiring an unauthorized worker.
- Knowingly hiring or continuing unauthorized employment can bring fines and orders to stop the violation.
- A pattern or practice of knowing violations can lead to criminal penalties. Fraud and other misconduct can create additional liability.
- Wage, tax, and worker-classification violations are separate issues.
For workers
- A job may end if the worker cannot establish required authorization.
- Unauthorized work can affect eligibility for future immigration benefits; consequences and exceptions depend on the case.
- A person without lawful status may face removal proceedings.
- Identity misuse, false documents, or a false claim to U.S. citizenship can create separate, serious consequences.
An employer is not automatically guilty simply because a worker later turns out to be unauthorized. Good-faith verification matters. But completing a form does not excuse knowingly employing someone without authorization.
Fine amounts change and depend on the violation and enforcement history. The linked agency guidance provides current penalty information.
Sources: USCIS: employer penalties; federal employment-verification law; USCIS: unauthorized employment and adjustment of status; USCIS: false claims to citizenship.
Workers still have rights
Lack of work authorization does not give an employer permission to withhold earned wages or ignore workplace protections. The Department of Labor enforces covered minimum-wage and overtime requirements regardless of whether an employee is documented or undocumented.
Pay, safety, and retaliation
Applicable wage and workplace-safety protections still matter. Retaliation for asserting protected workplace rights may be unlawful. Coverage, deadlines, and remedies depend on the law; immigration status can limit some remedies, such as reinstatement or certain awards for work not performed.
Fair document checks
Employers must avoid discriminatory verification practices. They cannot demand a green card or extra documents simply because someone appears foreign. An accent, birthplace, or Social Security record mismatch is not proof that a worker lacks authorization.
A labor complaint does not itself grant immigration status or work authorization. A worker facing both workplace abuse and immigration concerns can seek advice from a qualified attorney or an accredited representative.
Sources: DOL Fact Sheet 48: wage-law protections; DOL: retaliation protections; NLRB: immigrant worker rights and remedy limits; DOJ: discrimination and document checks.
Common questions
Does an ITIN make someone eligible to work?
No. An Individual Taxpayer Identification Number is for federal tax purposes. It does not grant immigration status or work authorization. Paying taxes and having permission to work are separate issues.
Does every immigrant need sponsorship?
No. A permanent resident or someone with authorization that permits the offered job may already be eligible. Employer sponsorship is needed only for pathways that require it.
Can a business hire someone while they wait for a work permit?
Not merely because an application is pending. The person needs a valid basis to work. Some existing authorizations or specific extensions permit continued work, but this must be checked rather than assumed.
Can an employer just choose to hire only citizens?
A blanket citizens-only policy can violate anti-discrimination law. Some jobs do have citizenship requirements imposed by law, regulation, executive order, or government contract.
Sources: IRS: what an ITIN does and does not do; USCIS: employment authorization applications; DOJ: citizenship-status discrimination.
Official resources & help
Program eligibility, renewal rules, fees, and court orders can change. Use the relevant agency’s current instructions for an actual hire or application.
- USCIS I-9 Central
Forms, document rules, and employer guidance. - USCIS: working in the United States
Temporary, permanent, and other work pathways. - DOL: foreign labor programs
Employer certification and program requirements. - E-Verify
Employer verification and employee case-resolution information. - DOJ Immigrant and Employee Rights Section
Hiring discrimination and unfair document practices. - DOL: wage complaints and investigations
Questions about unpaid wages and workplace complaints.