Complete comparison of F-1 OPT and STEM OPT: duration, eligibility requirements, employer restrictions, reporting obligations, and how to transition from OPT
Optional Practical Training (OPT) is a period of temporary employment authorization that allows F-1 international students to work in the United States in a position directly related to their field of study. OPT is available to students who have been in full-time F-1 status for at least one academic year.
OPT can be authorized before graduation (pre-completion OPT) or after graduation (post-completion OPT). Post-completion OPT is the most common form and is what most graduates use to work after finishing their degree. Students receive a 12-month OPT authorization, during which they must work (or have a bona fide job offer) in their field of study.
Standard (non-STEM) OPT is available to students graduating from any accredited U.S. degree program. The employer does not need to be on E-Verify, there is no formal training plan requirement, and there are fewer reporting obligations compared to STEM OPT. However, the work must still be directly related to the student's degree field.
STEM OPT is a 24-month extension of standard OPT available only to students who (1) have a qualifying STEM degree, (2) are employed by an E-Verify participating employer, and (3) have an approved I-983 Training Plan. STEM OPT adds 24 months to the standard 12-month OPT for a total of 36 months.
| Factor | Standard OPT | STEM OPT Extension |
|---|---|---|
| Duration | 12 months | 24 additional months (total 36) |
| Degree requirement | Any accredited U.S. degree | STEM CIP-coded degree on DHS list only |
| E-Verify employer required | No | Yes, mandatory |
| Training plan (I-983) | No | Yes, employer must sign |
| 6-month student reporting | No | Yes, mandatory to DSO |
| Unpaid work allowed | Limited (nonprofits) | No, must be paid same as U.S. workers |
| Unemployment days limit | 90 days total | 60 days total during STEM period |
Transitioning from standard OPT to STEM OPT requires proactive planning, you must apply before your standard OPT EAD expires, not after. Here is the complete transition sequence.
90 Days Before OPT Expiration: Confirm your STEM degree is on the DHS CIP list. Confirm your employer is enrolled in E-Verify (or encourage them to enroll if they are not).
90–60 Days Before Expiration: Complete Form I-983 Training Plan with your employer. Both you and a company representative (usually HR or your supervisor) must sign. Submit the I-983 to your DSO for review and approval.
After DSO Approval: DSO recommends STEM OPT in SEVIS and issues a new I-20 reflecting the STEM OPT recommendation. Use this new I-20 to prepare your I-765 USCIS filing package.
File I-765 with USCIS: Mail or submit online. Include the I-765 form, $520 filing fee, signed I-983, new I-20, copy of current EAD, and passport copy. USCIS issues receipt notice.
After Filing: If USCIS processing extends beyond your current EAD expiration date, you receive a 180-day automatic EAD extension. Your standard OPT EAD remains valid and you continue working with it plus the USCIS receipt notice as joint authorization. Once USCIS approves, your new STEM OPT EAD card arrives by mail.
One of the most practically important differences between standard OPT and STEM OPT is the unemployment day limit, the maximum number of days you can be unemployed (or not engaged in qualifying training) without violating your F-1 status.
Standard OPT: 90 total unemployment days. This means across your entire 12-month OPT period, you may not be unemployed (and not in training) for more than 90 days cumulative. Pre-OPT unemployment days (between graduation and OPT start) do not count toward this limit.
STEM OPT: An additional 60 days of unemployment during the 24-month extension period. This 60-day limit is separate from and in addition to the 90-day standard OPT limit. So if you used 60 days of unemployment during standard OPT, you have 30 remaining OPT days, but you get a fresh 60-day limit for the STEM extension period.
Unemployment days accumulate from the OPT start date, not just from the day you stopped working. If you are in between jobs, proactively document your job search activities. Exceeding the unemployment day limits is a violation of F-1 status that can have serious immigration consequences. Report job losses to your DSO immediately.
The strategic value of STEM OPT lies almost entirely in its ability to extend your U.S. work authorization while you pursue H-1B lottery selection. With standard 12-month OPT, you may only get one shot at the H-1B lottery (April filing for October 1 start) before your OPT expires. With 36-month total STEM OPT, you get up to three lottery cycles.
Optimal H-1B Filing Timeline with STEM OPT:
• Year 1 OPT: Apply for H-1B in April (Lottery Cycle 1). If selected, start H-1B October 1.
• If not selected, continue on OPT (cap-gap through September 30). Apply for STEM OPT extension before OPT expires.
• Year 2 STEM OPT: Apply for H-1B in April (Lottery Cycle 2).
• Year 3 STEM OPT: Apply for H-1B in April (Lottery Cycle 3).
• Year 4: If still not selected, explore cap-exempt employers or other visa options.
The three-cycle strategy dramatically improves H-1B odds. With approximately 30–35% selection probability per cycle (rough estimate varying year to year), three independent tries produce a cumulative probability of approximately 65–75% of eventual selection. Students who can only do one cycle face much worse expected outcomes.
Sumit Patel
Immigration content strategist with 8+ years covering U.S. visa policy, USCIS procedures, and employment-based immigration. Not a licensed attorney, always consult a qualified immigration lawyer for your specific case.