Can F-1 Visa Holders Work Legally in the US? CPT, OPT, and STEM

Yes, F1 visa holders can work in the US, but only within the specific channels federal immigration rules allow. On-campus jobs are open from the start of your program. Off-campus work requires separate authorization, usually through Curricular Practical Training (CPT) or Optional Practical Training (OPT). Anything outside those lanes, even a few hours of unpaid work in the wrong category, can end your status and follow you for years.

On-Campus Work

On-campus employment is the easiest path. You can start as early as 30 days before your first semester and you don’t need to file anything with USCIS.¹ Your Designated School Official (DSO) handles authorization at the school level. You need to be enrolled full-time and maintaining valid F1 status.²

You can work up to 20 hours per week while school is in session. That cap is the combined total across every on-campus job you hold, not per job.³ During official school breaks and annual vacation, you can go up to 40 hours per week.⁴

The category covers work directly for the school (library, lab, cafeteria), work for commercial businesses that operate on campus to serve students such as the bookstore, and jobs at off-campus locations educationally affiliated with your school, meaning the work connects to the school’s established curriculum or to funded graduate research.⁴ A construction crew building a new dorm doesn’t count, even though the work happens on campus.

Curricular Practical Training

CPT lets you work off-campus when the position is a required or integral part of your degree program. Internships, co-ops, and practicum placements all qualify, provided the work relates directly to your major and is built into your school’s curriculum.⁵ You need a job offer before your DSO can authorize anything.

You must have been enrolled full-time for at least one full academic year before starting CPT. The exception: graduate students in programs that require immediate practical experience can get CPT during their first semester.

CPT is either part-time (20 hours per week or fewer) or full-time (more than 20). The distinction matters for what comes next. Part-time CPT has no effect on your future OPT eligibility. But if you accumulate 12 months or more of full-time CPT, you lose eligibility for OPT at that same degree level entirely.⁶ Move up to a higher degree later and you get a fresh 12-month OPT allotment at that new level.

To get authorized, ask your academic department to confirm in writing that the training is integral to your curriculum, then bring that confirmation and your job offer details to your DSO. If approved, the DSO updates SEVIS and prints a new Form I-20 showing the CPT authorization, with your specific employer and dates. You can’t begin working until that endorsed I-20 is in your hand. No USCIS application or EAD card is required.

Optional Practical Training

OPT is the main pathway for F1 students to work in a job related to their major field. Unlike CPT, it doesn’t need to be built into your curriculum, but the work still has to connect to what you studied. You earn up to 12 months of OPT for each higher degree level you complete.⁷

Pre-Completion and Post-Completion

Pre-completion OPT lets you work while still enrolled, but it uses up your 12-month total. Part-time pre-completion work counts at half the rate: 12 months of part-time work burns only 6 months of your OPT clock.⁸ During the school year, pre-completion OPT is capped at 20 hours a week. During breaks, you can work full-time.

Post-completion OPT is what most students are after. It gives you full-time work authorization after graduation, using whatever remains of your 12-month allotment. The catch: you can’t be unemployed for too long. You get a maximum of 90 aggregate days of unemployment during the post-completion OPT period.⁸ Those days add up quickly when you factor in how long a first job search can take.

Applying

OPT requires USCIS approval. Your DSO reviews your eligibility, enters an OPT recommendation in SEVIS, and prints an updated Form I-20. You then file Form I-765 (Application for Employment Authorization) with USCIS within 30 days of the DSO’s recommendation.⁹ File before your DSO enters the recommendation and USCIS will deny the application.¹⁰

For post-completion OPT, you can apply as early as 90 days before your program end date and no later than 60 days after. Apply early. Processing commonly takes several months, you can’t start working until you physically receive your EAD card and your authorized start date has arrived, and every day between your start date and the day the card shows up counts against your 90-day unemployment limit.

Reporting

Once you’re on OPT, you have to report certain changes to your DSO or through the SEVP Portal within 10 days: your physical address, mailing address, legal name, and any changes in employment status.¹¹ Failing to report can cost you your OPT authorization. Students slip on this most often when they move apartments between jobs.

STEM OPT Extension

If your degree is in an eligible science, technology, engineering, or math field, you can extend post-completion OPT by an additional 24 months beyond the initial 12, for up to 36 months of work authorization total. The requirements are stricter than standard OPT.

Your employer must be enrolled in E-Verify. You and your employer must complete a Form I-983 Training Plan, in which the employer names a supervisor to monitor your progress and commits to periodic evaluations of your work.¹² Any significant change to the plan, such as a pay cut or a drop below 20 hours per week, must be reported.

The unemployment limit gets stricter in a way that catches people off guard. You get 150 aggregate days of unemployment across the entire combined OPT and STEM extension period, not 90 plus another 150.¹³ So if you used 60 unemployment days during your initial OPT year, only 90 remain for the 24-month extension.

Cap-Gap Extension to H-1B

If you’re on OPT and your employer files a cap-subject H-1B petition requesting a change of status for the upcoming fiscal year, your F1 status and OPT work authorization automatically extend to bridge the gap between OPT ending and H-1B status beginning.¹⁴ If the petition is approved, the extension runs until April 1 of the fiscal year for which H-1B status was requested, or until the H-1B start date, whichever comes first.

Other Off-Campus Categories

A few narrow off-campus categories exist for specific circumstances. Each requires a DSO recommendation in SEVIS, a Form I-765 application to USCIS, and an approved EAD card before you can start.

Severe Economic Hardship

If unforeseen financial problems arise after you started your program, you can apply for off-campus work authorization on severe economic hardship grounds. USCIS looks for genuinely unexpected circumstances beyond your control: loss of financial aid or on-campus employment, a sharp currency devaluation in your home country, sudden spikes in tuition or living costs, or major unexpected expenses like medical bills. You must also show that on-campus work is unavailable or insufficient, and you need to have been enrolled full-time for at least one academic year before applying.¹⁰

International Organization Employment

A job offer from a recognized international organization covered by the International Organizations Immunities Act (the United Nations, the World Bank, and similar bodies) qualifies you to apply for work authorization through USCIS. The position must be in the United States.

Special Student Relief

When the Department of Homeland Security determines that emergent circumstances (political upheaval, war, natural disaster) affect students from a particular country or region, it can publish a Federal Register notice suspending certain employment restrictions. Eligible F1 students from the affected area experiencing severe economic hardship as a direct result can request expanded work authorization, including off-campus jobs and additional hours during the school year.¹⁵ Eligibility depends on the terms of the specific notice, so ask your DSO if you think you may qualify.

Getting a Social Security Number

You need a Social Security Number to work legally in the US. For on-campus employment, bring your passport, Form I-94, Form I-20, a letter from your DSO confirming enrollment and job details, and a letter from your employer describing the position and hours.¹⁶ For CPT, your Form I-20 with the CPT endorsement serves as proof of work eligibility. For OPT, you need your EAD card (Form I-766). Bring originals; the SSA does not accept photocopies or notarized copies.

If you applied for OPT, you can request an SSN on the Form I-765 itself. If you didn’t check that box, visit a local Social Security office after your EAD card arrives.¹⁷ Processing can take several weeks, so plan ahead.

Taxes on F1 Wages

Earning income on an F1 visa creates federal tax obligations, but you get a real break on payroll taxes for the first several years. If you’ve been in the US fewer than five calendar years, you’re generally classified as a nonresident alien and exempt from Social Security and Medicare taxes on wages from authorized employment: on-campus jobs, off-campus employment authorized by USCIS, and practical training positions all qualify. After five calendar years, you may become a resident alien for tax purposes if you meet the substantial presence test, at which point Social Security and Medicare taxes apply to your wages like any other worker.¹⁸

Nonresident alien F1 students who earn income must file Form 1040-NR to report it.¹⁹ F1 students who earn nothing during the year still have to file Form 8843 to document their exempt status. If your employer is withholding Social Security or Medicare during your first five years, that’s likely an error worth raising with payroll.

What Unauthorized Work Costs

Working without proper authorization, even briefly, even unpaid in some circumstances, violates your F1 status. Your employment authorization terminates automatically when you fall out of status.¹

The consequences reach past your current work permission. If you later try to become a permanent resident through adjustment of status, unauthorized employment creates a bar that doesn’t go away by leaving and reentering the country. Under federal immigration law, anyone who has accepted unauthorized employment is generally barred from adjusting status inside the United States, whether the unauthorized work happened before or after filing the adjustment application.²⁰ USCIS sets no time limit on when the unauthorized work occurred. A few weeks off the books during your second semester can resurface years later when you apply for a green card.

If you aren’t sure whether a particular opportunity counts as authorized employment, ask your DSO before you start. A delayed start date is far cheaper than a permanent immigration bar.

1
U.S. Citizenship and Immigration Services. USCIS Policy Manual Volume 2, Part F, Chapter 6 – Employment
2
U.S. Citizenship and Immigration Services. Students and Employment
3
U.S. Immigration and Customs Enforcement. Employment
4
eCFR. 8 CFR 214.2 – Special Requirements for Admission, Extension, and Maintenance of Status
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Study in the States. F-1 Curricular Practical Training (CPT)
6
U.S. Immigration and Customs Enforcement. Practical Training
7
U.S. Citizenship and Immigration Services. Optional Practical Training (OPT) for F-1 Students
8
U.S. Citizenship and Immigration Services. USCIS Policy Manual Volume 2, Part F, Chapter 5 – Practical Training
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Study in the States. F-1 Optional Practical Training (OPT)
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Study in the States. F-1 Off Campus Employment and International Organization Internship
11
Study in the States. OPT Student Reporting Requirements
12
U.S. Immigration and Customs Enforcement. Completing the Form I-983 Training Plan for STEM OPT Students
13
Study in the States. STEM OPT Extension Overview
14
U.S. Citizenship and Immigration Services. Extension of Post-Completion Optional Practical Training (OPT) and F-1 Status for Eligible Students
15
U.S. Immigration and Customs Enforcement. F-1 Special Student Relief Fact Sheet
16
Social Security Administration. International Students and Social Security Numbers
17
Social Security Administration. Apply For Your Social Security Card While Applying For Your Work Permit
18
Internal Revenue Service. Foreign Student Liability for Social Security and Medicare Taxes
19
Internal Revenue Service. About Form 1040-NR, U.S. Nonresident Alien Income Tax Return
20
U.S. Citizenship and Immigration Services. USCIS Policy Manual Volume 7, Part B, Chapter 6 – Unauthorized Employment