For many F-1 international students in the United States, gaining work experience is a major part of the academic journey. Internships, co-ops, research roles, and full-time jobs can help students build professional skills, expand their networks, and prepare for long-term career opportunities.
However, international students cannot simply accept any job offer. F-1 students must receive the correct work authorization before beginning employment. Two of the most common options are Curricular Practical Training (CPT) and Optional Practical Training (OPT).
While both CPT and OPT allow eligible F-1 students to gain practical experience related to their field of study, they have very different rules, timelines, and consequences. Choosing the wrong option—or starting work before authorization—is a serious mistake that can affect a student’s immigration status.
This guide explains the key differences between CPT and OPT, when to use each option, how to apply, and what international students should know before accepting an internship or job.
What Is CPT?
Curricular Practical Training (CPT) is work authorization for F-1 students who need practical training as part of their academic program.
CPT can include:
- Internships
- Cooperative education programs (co-ops)
- Practicums
- Fieldwork
- Work-study programs
- Required training placements
To qualify, the employment must be directly related to the student’s major and must be an integral part of the school’s established curriculum. In many cases, students enroll in an internship course or receive academic credit for the work experience.
Unlike OPT, CPT is authorized by the student’s school through the DSO. Students do not file an employment authorization application with USCIS for standard CPT approval.
Key CPT Features
- CPT is used before completing a degree program.
- The job must relate directly to the student’s major.
- The experience must be part of the academic curriculum.
- Students must obtain a job offer before requesting CPT.
- A DSO must authorize CPT in SEVIS and issue an updated Form I-20.
- Students may work part-time or full-time, depending on the authorization.
- Students cannot begin working before the CPT start date listed on the Form I-20.
For a detailed overview, students can review ICE’s Practical Training guidance.
What Is OPT?
Optional Practical Training (OPT) is temporary employment authorization that allows F-1 students to work in a job directly related to their major area of study.
Unlike CPT, OPT does not need to be part of a required course, internship class, or academic curriculum. It is called “optional” because it gives students flexibility to gain practical experience during or after their studies.
There are two main types of OPT:
- Pre-completion OPT — used before completing a degree program
- Post-completion OPT — used after completing a degree program
Most international students use post-completion OPT after graduation because it allows them to work full-time in the United States for up to 12 months.
OPT requires both a DSO recommendation and approval from U.S. Citizenship and Immigration Services (USCIS). Students must file Form I-765, Application for Employment Authorization, and receive an Employment Authorization Document (EAD) before starting work.
CPT vs. OPT: Quick Comparison
| Feature | CPT | OPT |
|---|---|---|
| Full name | Curricular Practical Training | Optional Practical Training |
| When it is used | Before program completion | Before or after program completion |
| Main purpose | Training that is part of the curriculum | Work experience related to the student’s major |
| Must be tied to a course or curriculum? | Yes | No |
| Who authorizes it? | School DSO | DSO recommends; USCIS approves |
| USCIS application required? | Usually no | Yes, Form I-765 is required |
| EAD card required? | No | Yes |
| Job offer required before applying? | Yes | Not always for initial OPT application |
| Work hours | Part-time or full-time | Depends on pre- or post-completion OPT |
| Effect on future OPT | 12 months or more of full-time CPT can eliminate OPT at the same degree level | Pre-completion OPT reduces remaining post-completion OPT time |
The Biggest Difference: CPT Is Curriculum-Based
The most important distinction is simple:
- CPT is tied to your academic program.
- OPT is tied to your field of study.
For CPT, the internship or work experience must be an integral part of the curriculum. Your university may require you to register for an internship course, receive academic credit, or show that the placement is required for your degree.
For OPT, the job does not have to be part of a course. It only needs to be directly related to your major.
For example, a data analytics student may use CPT for a summer internship that is connected to an internship course. After graduation, the same student may use post-completion OPT for a full-time data analyst role that is directly related to the degree.
CPT Eligibility Requirements
To qualify for CPT, an F-1 student generally must:
- Be enrolled in a SEVP-certified school.
- Have maintained valid F-1 status.
- Be enrolled full-time for at least one academic year.
- Have a job offer from an employer.
- Work in a role directly related to the major.
- Show that the training is an integral part of the academic curriculum.
- Receive CPT authorization from the DSO before beginning employment.
There is an important exception for some graduate students. If a graduate program requires immediate participation in an internship or practicum, the DSO may be able to authorize CPT during the first academic year. Students should confirm this directly with their international student office.
OPT Eligibility Requirements
To qualify for OPT, an F-1 student generally must:
- Be enrolled in a SEVP-certified school.
- Have maintained F-1 status.
- Complete at least one academic year of full-time study.
- Work in a role directly related to the major area of study.
- Receive a DSO recommendation in SEVIS.
- File Form I-765 with USCIS.
- Receive an EAD card before beginning employment.
Students are generally eligible for up to 12 months of OPT at each higher education level. For example, a student may receive OPT after a bachelor’s degree and later become eligible for another 12 months after completing a master’s degree.
Part-Time vs. Full-Time CPT
CPT can be authorized as either part-time or full-time.
Part-Time CPT
Part-time CPT generally means working 20 hours or fewer per week while school is in session.
Part-time CPT does not reduce a student’s future OPT eligibility, even if the student uses CPT for multiple semesters.
Full-Time CPT
Full-time CPT generally means working more than 20 hours per week.
Students can use full-time CPT during academic breaks or, in some cases, during the academic year if their program permits it.
However, there is a major rule to remember:
If a student completes 12 months or more of full-time CPT, they become ineligible for OPT at the same educational level.
This is one of the most important planning considerations for F-1 students. A student who uses a full year of full-time CPT during a master’s program may lose the ability to use post-completion OPT after that master’s degree. Part-time CPT does not create the same problem.
Pre-Completion OPT vs. Post-Completion OPT
Pre-Completion OPT
Pre-completion OPT is used while a student is still enrolled in school.
During the academic year, students may generally work up to 20 hours per week. During official school breaks, eligible students may work full-time.
However, pre-completion OPT reduces the amount of post-completion OPT available later. For example, using six months of full-time pre-completion OPT generally leaves six months of post-completion OPT at the same degree level.
Post-Completion OPT
Post-completion OPT begins after a student completes the degree program or all required coursework.
Most students use post-completion OPT because it allows them to work full-time after graduation. Students are generally allowed up to 12 months of post-completion OPT, minus any time used for pre-completion OPT at the same degree level.
STEM OPT Extension: Can You Work Longer Than 12 Months?
Students with qualifying STEM degrees may be eligible for a 24-month STEM OPT extension after completing regular post-completion OPT.
That means eligible students may receive up to 36 months of work authorization:
- 12 months of regular OPT
- 24 months of STEM OPT extension
To qualify for STEM OPT, students generally must:
- Be in a valid period of post-completion OPT.
- Have a qualifying STEM degree on the DHS STEM Designated Degree Program List.
- Work for an employer enrolled in E-Verify.
- Work in a qualifying training opportunity.
- Complete Form I-983, Training Plan for STEM OPT Students.
- Meet reporting and evaluation requirements.
Students on STEM OPT must also follow stricter reporting rules, including employment updates, validation reports, and training-plan evaluations.
How to Apply for CPT
The CPT process is handled through your school’s international student office.
A typical CPT application process looks like this:
- Secure an internship, co-op, practicum, or qualifying job offer.
- Confirm that the role is directly related to your major.
- Ask whether you must register for an internship course or receive academic credit.
- Submit the employer offer letter and required documents to your DSO.
- Receive an updated Form I-20 showing CPT authorization.
- Begin work only on or after the CPT start date listed on the I-20.
CPT authorization is employer-specific and date-specific. If you change employers, extend your internship, or add another position, you may need new CPT authorization before working.
How to Apply for OPT
The OPT process requires coordination with both your school and USCIS.
A typical post-completion OPT application process includes:
- Request an OPT recommendation from your DSO.
- Receive a new Form I-20 with the OPT recommendation.
- File Form I-765 with USCIS.
- Pay the required filing fee.
- Wait for USCIS to approve the application.
- Receive your EAD card.
- Begin work only after the EAD start date.
Students should plan early because USCIS processing times can vary. Starting work before receiving the EAD or before the EAD start date can be considered unauthorized employment.
For official filing instructions, review USCIS Form I-765 information.
CPT vs. OPT: Which One Should You Choose?
The right choice depends on your academic stage and career goals.
Choose CPT If:
- You are still enrolled in school.
- You have an internship or co-op offer.
- The work experience is connected to your curriculum.
- Your program requires practical training.
- You need authorization quickly through your school.
- You want to gain experience before graduation.
Choose OPT If:
- You want work authorization that is not tied to a course.
- You are graduating or have completed your degree requirements.
- You want to work full-time after graduation.
- You want flexibility to work for an employer in your field.
- You may qualify for a STEM OPT extension.
Common CPT and OPT Mistakes to Avoid
International students should be careful because employment violations can create serious immigration consequences.
1. Starting Work Before Authorization
Never begin an internship, paid job, unpaid role, or training opportunity before receiving the correct authorization.
For CPT, wait until you receive the updated I-20 and the CPT start date has arrived.
For OPT, wait until USCIS approves the application and your EAD start date is valid.
2. Assuming Every Internship Qualifies for CPT
Not every internship can be authorized as CPT. The position must be related to your major and must fit within your school’s established curriculum.
3. Forgetting That Full-Time CPT Can Affect OPT
Using 12 months or more of full-time CPT can eliminate OPT eligibility at the same degree level. Students should discuss long-term planning with their DSO before accepting extended full-time CPT.
4. Working in a Job Unrelated to Your Major
Both CPT and OPT employment must be directly related to your major area of study. A job that does not clearly connect to the degree may put your status at risk.
5. Missing OPT Unemployment Limits
Students on post-completion OPT may not accumulate more than 90 days of unemployment. Students with a STEM OPT extension may not exceed 150 days of unemployment total across the regular OPT and STEM OPT periods.
6. Failing to Report Changes
Students on OPT must report qualifying changes, such as address changes, employer changes, and employment interruptions. STEM OPT students have additional reporting and evaluation requirements.
Frequently Asked Questions About CPT and OPT
Can I use CPT and OPT in the same degree program?
Yes. Many students use CPT for internships while enrolled and then use OPT after graduation. However, using 12 months or more of full-time CPT removes OPT eligibility at the same degree level.
Does CPT require an EAD card?
No. CPT is authorized by your DSO and shown on your Form I-20. An EAD card is not required for CPT.
Does OPT require a job offer?
A job offer is not generally required to apply for initial post-completion OPT. However, once OPT begins, students must follow employment and unemployment rules.
Can I work multiple jobs on OPT?
In many cases, yes, as long as each job is directly related to your major and meets applicable OPT requirements. STEM OPT has additional employer and reporting requirements.
Can I do CPT after graduation?
No. CPT must occur before the program end date. Students who have completed their program typically use post-completion OPT instead.
Can unpaid internships count for OPT?
Unpaid work may be allowed in some circumstances if it is directly related to the student’s major and otherwise complies with applicable labor and immigration rules. Students should confirm the arrangement with their DSO before starting.
Final Thoughts: Plan CPT and OPT Early
CPT and OPT are valuable opportunities for international students to gain U.S. work experience, but they should be used strategically.
CPT is best for curriculum-connected internships and practical training while you are enrolled. OPT is usually the better option for broader work experience, especially after graduation.
Before accepting any internship or job, speak with your DSO. Your school’s international student office can confirm whether the role qualifies, what documents you need, and when you can legally begin work.
A well-planned CPT and OPT strategy can help you build experience, protect your F-1 status, and prepare for your next career step in the United States.