If you're an F-1 international student in the US, you have two main options for working off-campus while studying or after graduation: CPT (Curricular Practical Training) and OPT (Optional Practical Training). Many students confuse the two or misuse them, which can have serious consequences for their immigration status. Here's a clear breakdown.
What Is CPT?
Curricular Practical Training allows F-1 students to work off-campus as part of their academic program. The key word is "curricular" — the work must be directly tied to your degree program. CPT can be part-time (20 hours or less per week) or full-time (more than 20 hours per week).
Important: If you use 12 or more months of full-time CPT, you lose your eligibility for OPT. This is one of the most serious mistakes international students make.
What Is OPT?
Optional Practical Training allows F-1 students to work in the US in a job related to their major. OPT can be used during your studies (pre-completion OPT) or after graduation (post-completion OPT). Most students use post-completion OPT after they graduate.
OPT gives you 12 months of work authorization, extendable to 36 months if you have a STEM degree and your employer is enrolled in E-Verify.
Key Differences at a Glance
- Timing: CPT is used during your degree. OPT can be used during or after.
- Authorization: CPT is authorized by your DSO. OPT requires a USCIS application and physical EAD card.
- Duration: CPT can be unlimited (with consequences). OPT is limited to 12 or 36 months.
- Cost: CPT has no filing fee. OPT requires a USCIS filing fee (currently $410).
- Impact: Full-time CPT of 12+ months eliminates OPT eligibility.
When to Use CPT
Use CPT for internships, co-ops, or practicums that are part of your degree requirements. Make sure you get proper authorization from your DSO before starting work. Never work on CPT without written authorization.
When to Use OPT
Use OPT after graduation to gain professional experience in your field. This is the primary work authorization most international students use when job searching after completing their degree.
Common Mistakes to Avoid
- Using full-time CPT for 12+ months and losing OPT eligibility.
- Starting CPT work before receiving written authorization from your DSO.
- Working in a role unrelated to your field of study.
- Forgetting to report employment to your DSO within required timeframes.
Which Should You Choose?
The answer depends on your situation. If you have a required internship as part of your degree, CPT is the right tool. But be careful about how much full-time CPT you use. Protect your OPT eligibility — it's one of your most valuable assets as an international student.