CPT vs OPT: Paid Internships While Still Enrolled
By Muntasir Minhaz • Published Aug 19, 2026 • Canadians Studying Abroad
CPT lets you take a paid internship tied to your program while still enrolled, authorized by your school; OPT is separate work authorization from USCIS mostly used after you finish your degree, though a part-time pre-completion version exists too.
CPT needs your internship built into your curriculum, either as a required course or for course credit.
OPT does not need to connect to a specific class, only to your overall field of study.
12 months or more of full-time CPT at one degree level removes your eligibility for OPT at that level.
Part-time CPT (20 hours a week or less) does not use up OPT eligibility.
Your DSO authorizes CPT directly in SEVIS; OPT needs a separate application to USCIS.
The core difference
Curricular Practical Training (CPT) and Optional Practical Training (OPT) both let F-1 students work legally in the US, but they serve different points in your degree. CPT covers work you do while still enrolled and connected to a specific curriculum requirement, like a required internship or a for-credit practicum. OPT is broader work authorization from USCIS, most commonly used after you finish your program, though a pre-completion version lets you work part-time before graduation too. Both are explained on the SEVIS Practical Training page .
Side by side
| CPT | OPT | |
|---|---|---|
| Who approves it | Your school's DSO, directly in SEVIS | USCIS, after your DSO recommends it |
| When you use it | While enrolled, tied to your curriculum | Before or after graduation |
| Processing time | Often days | Weeks to months |
| Separate work permit card | No, your I-20 lists the authorization | Yes, a physical Employment Authorization Document (EAD) |
| Tied to a specific employer | Yes, one authorization per employer and dates | No, employers change freely within your field |
| Effect of 12+ months full-time use | Removes OPT eligibility at that degree level | Not applicable |
Eligibility for CPT
You need at least one full academic year of enrollment, two full-time semesters, before you qualify for CPT, with an exception for graduate programs that require an internship from the first term. Your internship must connect directly to your degree, either as a required course or an elective taken for credit. Retail, food service or general unskilled roles do not qualify, since CPT exists for training tied to your field, not general income.
Your DSO authorizes each CPT placement separately in SEVIS, listing the employer, dates and hours before your start date. Work does not start before that authorization appears on your I-20. CPT runs part-time, 20 hours a week or less, during fall and spring terms, or full-time in some programs and during official school breaks.
Eligibility for OPT
OPT does not require a specific course or credit connection, only that the work relates to your overall field of study. You apply directly to USCIS through your DSO's recommendation in SEVIS, and processing commonly takes weeks. Post-completion OPT gives you 12 months of work authorization after you finish your degree, and STEM graduates add a 24-month extension. Pre-completion OPT allows part-time work, 20 hours a week, during school terms and full-time during breaks, but any pre-completion time used gets subtracted from your total post-completion months.
How you apply
For CPT, you request authorization through your international student office, name your employer and dates, and your DSO issues a new I-20 with the CPT annotation before you start. For OPT, you complete Form I-765 with USCIS, pay the filing fee, and wait for your DSO to recommend the request in SEVIS first. Build in extra time for OPT: file within the window your DSO sets, since a late application costs you your work authorization start date.
The 12-month full-time CPT trap
Use 12 months or more of full-time CPT at one degree level and eligibility for OPT at that same level disappears entirely. This catches students who take a long full-time co-op term or repeated full-time internships without tracking cumulative time. Part-time CPT, 20 hours a week or less, does not count against OPT eligibility, regardless of how long it runs, which is why many schools push students toward part-time CPT during term time and reserve full-time CPT for a single summer placement.
Which one fits your situation
Choose CPT if your internship is required by your program or you want course credit while still enrolled
Choose CPT if you need authorization quickly, since your DSO processes it faster than a USCIS OPT application
Choose OPT (pre-completion) for part-time work unrelated to a specific class requirement while still in school
Save your full 12 months of post-completion OPT for after graduation where possible, since it is not tied to enrollment and gives the most flexibility to change employers
For Canadian students planning ahead
Track your CPT hours from your first placement, especially if your program includes a co-op stream with several full-time terms. A Canadian student who completes three full-time co-op semesters before graduating often uses up all 12 months of full-time CPT eligibility without noticing, and arrives at graduation with no OPT left. Ask your DSO to confirm your running CPT total whenever you accept a new placement, particularly a full-time one.