CPT: How to Do Internships on Your F-1 Visa
Curricular Practical Training lets you work in your field while enrolled. It's the pathway to co-ops, internships, and required fieldwork - but the 12-month full-time cap is a career-defining rule that every F-1 student must understand.
CPT Eligibility Requirements
You must have been enrolled for at least one full academic year (2 semesters) before your first CPT
CPT must be an integral part of your degree curriculum - required or for academic credit
Your DSO must authorize CPT before you begin work - working without authorization is a serious status violation
Graduate students in programs that require immediate CPT may be eligible in their first year (check with DSO)
CPT authorization is per-employer, per-semester - each internship requires a new authorization
CPT vs OPT: Key Differences
| Aspect | CPT | OPT |
|---|---|---|
| When | While enrolled in your degree | After completing your degree |
| Authorization | Through your school DSO | Through USCIS (I-765) |
| Duration | Per semester, renewable | 12 months (+ 24 STEM extension) |
| Employer E-Verify | Not required | Required for STEM extension only |
| Part-time limit | No limit to part-time semesters | N/A |
| Full-time risk | 12+ months full-time = no OPT | No equivalent risk |
Risks That Can End Your Status
The 12-month full-time CPT trap
Using CPT full-time (20+ hours/week) for 12 or more months makes you permanently ineligible for OPT. This is a hard rule with no exceptions. If you plan to use OPT after graduation, protect those 12 months carefully. Many students doing year-long co-ops don't realize until it's too late.
Working before DSO authorization
You cannot start a CPT job until your I-20 shows the CPT authorization - not after you've applied, not after verbal confirmation. The authorization is an endorsement on your I-20. Get the updated document first.
CPT at an unauthorized employer
CPT authorization is employer-specific. If you change companies mid-internship, you need a new CPT authorization. Starting work at a different employer than listed on your I-20 is unauthorized employment.
Part-time CPT during a required full-time semester
Some schools require full-time enrollment while doing CPT. Check your school's policy - particularly for thesis students or during capstone semesters. Dropping below full-time without a reduced course load authorization can trigger a status violation.
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