The F-1 student visa lets you study in the United States. By itself, it does not let you work outside your campus. To take an off-campus internship, paid or unpaid, or to start a real job after graduation, you need authorization through one of two specific programs: Curricular Practical Training, known as CPT, or Optional Practical Training, known as OPT. These two programs are the bridge between studying in the United States and building an early career there, and they are quietly the reason that the United States remains such a powerful destination for ambitious international students.
This guide walks through what CPT and OPT actually are, how each one works, when you can use them, and the practical decisions that matter most for international students planning their time in the United States.
The basic distinction
CPT is work authorization that is integrated with your academic curriculum. The work must be directly related to your major, must be required or strongly recommended by your degree program, and is approved by your school’s designated school official rather than by the federal government directly. CPT is most often used during semesters or summers while you are still enrolled.
OPT is a separate authorization that allows you to work in your field of study off-campus, typically after graduation, though it can also be used during certain periods of study. OPT is approved by US Citizenship and Immigration Services (USCIS) rather than by your school, and it grants twelve months of work authorization at the bachelor’s, master’s, or doctoral level. Students in qualifying STEM fields can extend OPT by an additional twenty-four months under the STEM OPT extension.
CPT in practice
To use CPT, your academic program must include some kind of integrated work experience, internship, practicum, cooperative education, or similar requirement. Many American universities create specific zero-credit or one-credit courses that allow students to use CPT for off-campus internships during the summer or academic year. Engineering programs, business programs, and some liberal arts programs offer these courses routinely.
The process is straightforward. You receive an internship offer from a US employer. You meet with your school’s international student office and your academic advisor to confirm that the internship is related to your major and falls within an approved CPT course or requirement. The international office issues you an updated I-20 with CPT authorization that lists the employer name, address, and the specific dates of authorization. You can begin working on the start date listed on the I-20 and must stop working on the end date.
CPT can be either part-time (twenty hours per week or less) or full-time (more than twenty hours per week). Full-time CPT during the academic year is generally not allowed except in specific program structures. There is no annual or lifetime limit on part-time CPT, but full-time CPT use of twelve months or more eliminates your eligibility for OPT, which is a critical thing to track.
OPT in practice
OPT is the more flexible and more important program for most international students. The standard twelve-month OPT begins after you graduate, though it can also be used pre-completion under certain conditions. The key features are:
You apply to USCIS for the work authorization, not to your school directly. The school plays a supporting role by issuing an updated I-20 recommending OPT, but the actual approval comes from USCIS through Form I-765.
The application takes between two and four months to process in 2026, depending on USCIS workload. You can begin working only after you receive your Employment Authorization Document, the EAD card. You cannot work during the application waiting period.
You can start applying for OPT up to ninety days before your program end date and up to sixty days after. The optimal window is typically about three months before graduation.
Your OPT employment must be directly related to your field of study. The interpretation of “directly related” is somewhat flexible. A computer science graduate working as a software engineer is clearly related. A computer science graduate working as a marketing manager is not.
You may not be unemployed for more than ninety total days during the standard twelve-month OPT period, or you risk losing your status. This unemployment rule is one of the most stressful parts of OPT for graduates whose first jobs do not start immediately.
The STEM OPT extension
If your degree is in a field that the US Department of Homeland Security has designated as STEM, you may apply for an additional twenty-four months of OPT after the standard twelve months, for a total of thirty-six months of work authorization. The list of qualifying STEM degrees is extensive and updated periodically, including most engineering disciplines, computer science, mathematics, statistics, several physical and biological sciences, several social sciences with quantitative emphasis, and certain quantitative business analytics programs. Always confirm whether your specific degree falls on the official STEM Designated Degree Program List.
To qualify for the STEM OPT extension, you must be employed by a company that is enrolled in E-Verify, a federal employment authorization verification system. Most large companies and many medium-sized companies are E-Verify enrolled. Smaller companies and some startups may not be, which can limit your options.
You must also have a written training plan, the Form I-983, signed by you and your employer, that describes the structured work-based learning component of the position. This is more substantive than a job description; it is a documented plan for what skills you will develop and how the position relates to your degree.
The STEM extension reduces the unemployment limit further. During the STEM extension, you may not be unemployed for more than 150 total days across the entire thirty-six-month OPT period, including any unemployed days from the standard OPT.
How OPT and the H-1B fit together
For most international students who hope to build a career in the United States after graduation, OPT is a bridge to the H-1B visa, which is the primary professional work visa for foreign nationals. The H-1B is sponsored by an employer, requires a specialty occupation matching the applicant’s degree, and is allocated through an annual lottery in March, with start dates beginning the following October.
The standard pattern is: graduate, use the standard twelve-month OPT to begin work, have your employer file an H-1B petition for the next March lottery, and either be selected and transition to H-1B status that October, or be rejected and rely on the STEM OPT extension to remain employed for additional time and try again the following year.
Students in non-STEM fields have only one shot at the H-1B lottery during their OPT period. Students in STEM fields effectively have three shots, since the thirty-six-month OPT period covers three lottery cycles. This is one of the most important practical reasons that international students often weigh STEM degrees more heavily when choosing a major.
What kinds of jobs work for OPT
OPT is more flexible than many international students realize. Acceptable arrangements include full-time employment, part-time employment of twenty or more hours per week, multiple concurrent part-time positions, paid internships, unpaid internships at organizations where unpaid work is legal, contract or freelance work for clients in your field, and employment in a startup that you yourself founded, provided the role and the company genuinely involve your field of study.
The startup-founder option is particularly interesting. International students with strong technical or entrepreneurial ambitions can use OPT to launch their own companies after graduation, provided they document their role and the relationship to their field of study and continue to track the unemployment day limits.
Reporting requirements during OPT
While you are on OPT, you must report several things to your school’s international student office, which in turn updates your SEVIS record. These include any change of employer, any change of address, any change of legal name, any period of unemployment, and the start and end dates of any new positions. The school typically maintains an online portal for these updates. Failing to report can lead to termination of your status.
Common mistakes to avoid
Several mistakes derail otherwise strong OPT plans.
The first is using too much full-time CPT before graduation. If you accumulate twelve months or more of full-time CPT, you forfeit OPT eligibility entirely. Track your CPT usage carefully across summers and semesters.
The second is failing to apply for OPT in time. The ninety-day pre-completion window opens fast. Plan for it in your final semester, not after.
The third is taking a job that is not clearly related to your field of study. USCIS does sometimes question whether OPT employment matches the degree, particularly during the STEM OPT extension review.
The fourth is exceeding the unemployment day limits. Track your days carefully. If you anticipate a gap between jobs, consider whether unpaid volunteer work or freelance projects in your field can keep your status active.
The fifth is failing to maintain documentation. Keep copies of your I-20s, your EAD card, your I-983, your offer letters, your pay stubs, and your I-765 application receipts. If USCIS or a future employer or visa officer ever questions your status history, the documentation matters.
Cap-gap, change of status, and the broader picture
If your H-1B is selected in the March lottery and your OPT would expire before the H-1B start date in October, you receive an automatic extension of your OPT through September thirtieth, called the cap-gap extension. This bridges the time between OPT expiration and H-1B activation.
If your H-1B is not selected and your STEM OPT runs out, you have several remaining options. You can apply to graduate school and re-enter F-1 status with a new degree program, which resets the OPT clock. You can transfer to an O-1 visa for individuals with extraordinary ability, an L-1 visa through an international employer transfer, or an EB-2 NIW or EB-1 employment-based green card if you are eligible. You can also leave the United States and work for the same employer abroad while waiting for future H-1B opportunities or other visa pathways.
Strategic implications
The CPT and OPT system, while complex, gives international students in the United States meaningful work options during and after study. The students who use these programs most effectively make several deliberate choices: they pursue STEM degrees when their interests allow it, they choose employers who are E-Verify enrolled and visa-savvy, they save documentation carefully, and they begin planning the H-1B and longer-term immigration pathway from their first OPT job rather than waiting until problems arise.
The American work-authorization system is built around the assumption that employers will sponsor the talented graduates they want to keep. The system rewards students who position themselves as obvious choices for sponsorship — strong degrees, in-demand fields, employers with the resources to navigate the immigration paperwork, and a clear professional trajectory that makes the sponsorship investment worth it. International students who think about CPT and OPT not as bureaucratic hoops but as strategic tools tend to build the strongest American careers.