OPT & STEM OPT for International Researchers

What OPT and STEM OPT Are

Optional Practical Training (OPT) is a period of temporary employment authorization available to F-1 international students that lets them work in a job directly related to their field of study, under 8 CFR 214.2(f)(10)(ii). A student can use up to 12 months of OPT per higher education level (associate, bachelor’s, master’s, or doctoral) — most commonly used after degree completion as “post-completion OPT,” which is the relevant case for international graduate researchers finishing a master’s or PhD.

The STEM OPT extension is a separate, additional authorization: graduate researchers who completed a degree in a field on the Department of Homeland Security’s STEM Designated Degree Program list (identified by Classification of Instructional Programs, or CIP, codes) can extend their post-completion OPT by 24 months, for up to 36 months of total OPT. The 24-month figure dates to a 2016 DHS rule that replaced an earlier, judicially vacated 17-month extension (Washington Alliance of Technology Workers v. DHS) — DHS reissued the extension through full notice-and-comment rulemaking specifically to fix that procedural defect, and 24 months has been the standard since.

The STEM OPT 24-Month Extension: Eligibility and Timing

To qualify, a student generally needs:

A bachelor’s, master’s, or doctoral degree in a field the DHS STEM CIP code list designates as STEM-eligible (many life-science, physical-science, engineering, mathematics, and a defined set of technology/data fields qualify; not every graduate program in a “STEM-adjacent” department automatically does — the CIP code on the student’s transcript/SEVIS record is what controls, not the department’s informal name).
A job offer from an employer enrolled in E-Verify.
A properly completed Form I-983 Training Plan, signed by the student and the employer, describing how the position relates to the STEM degree and how the employer will train and evaluate the student.
A timely-filed Form I-765 application — DHS allows filing up to 90 days before the current post-completion OPT authorization expires.

The 24-month STEM extension can generally be used only once per degree level, though a graduate researcher who completes a second, higher-level qualifying STEM degree (for example, moving from a STEM master’s to a STEM PhD) becomes eligible for a new 24-month extension tied to that later degree.

Employer and DSO Obligations: Form I-983, E-Verify, and Evaluations

The STEM OPT extension is compliance-heavier than standard OPT, which is one reason it matters operationally for research administration offices, not just international student services:

Form I-983 is filed with the school’s Designated School Official (DSO) — not with USCIS — but must be retained and made available for inspection.
E-Verify enrollment is mandatory for the employer named on the Form I-983; a university lab, research center, or affiliated employer hiring a STEM OPT graduate researcher must confirm its E-Verify status before the I-983 is signed.
Self-evaluations from both the student and the employer are due at the 12-month mark and again at the end of the STEM OPT period, submitted to the DSO rather than USCIS.
Material changes — a change of employer, a significant change in job duties, or a reduction below the minimum work-hour threshold — must be reported to the DSO, generally within 10 days.

For research offices supporting international postdoctoral researchers and graduate research staff, this creates a recurring coordination point between the sponsored-programs or grants office, the international student and scholar services (ISSS) office, and — where the position touches export-controlled research — the export control or research security office. See CASRAI’s guides on export control (EAR/ITAR) and international research collaboration and restricted party screening for how those obligations intersect with hiring a foreign national researcher.

Cap-Gap: Bridging OPT/STEM OPT and an H-1B Petition

Many international graduate researchers who complete OPT or STEM OPT are simultaneously the subject of an employer-filed H-1B petition requesting a change of status, timed to the H-1B cap’s October 1 start date. Because OPT/STEM OPT and the underlying F-1 status can expire before that October 1 start date, DHS’s “cap-gap” provision automatically extends F-1 status and, where applicable, work authorization through September 30 for students with a timely filed, non-frivolous H-1B petition — bridging the gap so the researcher does not have to stop working while the H-1B petition is pending or approved-but-not-yet-effective.

What’s Actually Changing in 2026: DHS’s “Duration of Status” Final Rule

The genuinely new development for 2026 is not a change to OPT or STEM OPT eligibility or duration — it is a broader DHS rule change to how F-1 status itself is admitted and tracked. DHS published a final rule eliminating “duration of status” (D/S) admission for F-1, J-1, and I nonimmigrants and replacing it with a fixed period of admission, published July 17, 2026, with an effective date of September 15, 2026 (not yet in effect as of this writing). Under the prior D/S framework, an F-1 student’s I-94 carried no fixed expiration date — status continued as long as the student maintained eligibility. Under the final rule:

F-1 students receive a specific admission end date on Form I-94 rather than an open-ended “D/S” notation, with the admission period not exceeding four years.
Students pursuing post-completion OPT or the STEM OPT extension who need work authorization to continue past their I-94 date must file a separate extension-of-stay application with USCIS — they can no longer simply continue under D/S while working.
While a timely filed extension-of-stay application is pending, reporting indicates DHS will provide an automatic extension of employment authorization for up to 240 days.
The 12-month standard OPT period, the 24-month STEM OPT extension, the existing 180-day automatic extension tied to a timely filed STEM OPT extension application, and cap-gap protections are reported to remain structurally unchanged by this rule — what changes is the admission-period mechanics around them, not the OPT/STEM OPT durations themselves.

A note on sourcing and confidence: this summary is based on multiple immigration-law-firm analyses published immediately after the rule’s release (Nixon Peabody, Ogletree, Reddy Neumann Brown, and others), cross-checked against DHS’s own Study in the States STEM OPT and “elimination of duration of status” pages, which independently confirm the July 17 publication and September 15, 2026 effective date. The Federal Register notice itself could not be directly retrieved while drafting this page. Given the rule is not yet in effect and implementation guidance from USCIS and individual DSOs is still developing, research administrators and international scholars should treat the operational specifics above — particularly the 240-day automatic-extension figure and exact extension-of-stay filing mechanics — as current best understanding rather than finalized procedure, and confirm directly against USCIS.gov and their institution’s ISSS office before the September 15, 2026 effective date and again shortly after it.

Practical Implications for Research Administrators and DSOs

For offices that support international STEM graduate researchers and postdoctoral researchers, the fixed-admission-period rule turns what used to be a largely self-monitored status (D/S) into a hard-deadline compliance item, similar in character to the grant reporting and effort-certification deadlines research administrators already track. Practical steps worth building into onboarding and renewal workflows now:

Track each F-1 researcher’s I-94 admission end date, not just their OPT/STEM OPT authorization end date — they will not always be the same date once the rule takes effect.
Build in lead time for extension-of-stay filings well before the I-94 expiration, mirroring the 90-day-advance filing discipline already used for STEM OPT extension applications.
Coordinate explicitly between the ISSS/DSO office (which manages SEVIS and the I-983) and the sponsored-programs or grants office (which manages the researcher’s appointment, funding source, and, where relevant, export-control screening) — a lapse in F-1 status has direct implications for a funded position’s allowability and for the researcher’s continued work eligibility.
Confirm the employer’s E-Verify enrollment before a STEM OPT Form I-983 is signed; a lapsed or missing E-Verify enrollment is a documented cause of STEM OPT extension denials independent of the 2026 rule change.

OPT vs. J-1 Academic Training: A Quick Distinction

International graduate researchers on a J-1 exchange visitor visa (rather than F-1) do not use OPT or STEM OPT at all — the comparable mechanism is Academic Training, authorized through the J-1 program sponsor rather than USCIS, with its own duration and reporting rules. The July 2026 “duration of status” final rule affects J-1 admission periods as well as F-1, so institutions hosting both F-1 and J-1 international researchers should expect the fixed-admission-period change to apply across both categories, even though the underlying practical-training mechanisms (OPT/STEM OPT versus Academic Training) remain distinct programs.

Frequently Asked Questions

How long is the STEM OPT extension?

24 months, in addition to the standard 12-month post-completion OPT period, for a maximum of 36 months of total OPT for an eligible STEM graduate.

Can a researcher use the STEM OPT extension more than once?

Generally only once per qualifying degree level. Completing a second, higher STEM degree (for example, a STEM PhD after a STEM master’s) creates a new eligibility window for another 24-month extension tied to that degree.

Does the 2026 DHS rule change how long OPT or STEM OPT lasts?

No. Reporting on the final rule indicates the 12-month OPT period, the 24-month STEM OPT extension, the 180-day automatic extension for timely filed STEM OPT applications, and cap-gap protections are preserved. What changes is that F-1 status itself moves from open-ended “duration of status” to a fixed I-94 admission period, requiring a separate extension-of-stay filing to continue past that date.

When does the “duration of status” rule take effect?

September 15, 2026 — 60 days after its July 17, 2026 publication. It was not yet in effect as of this page’s last review.

Is Form I-983 filed with USCIS?

No. It is completed by the student and employer and filed with the school’s Designated School Official (DSO), who retains it and makes it available for inspection; it is not submitted to USCIS as part of the Form I-765 application.

What is cap-gap and does it still apply?

Cap-gap is the automatic extension of F-1 status and, where applicable, work authorization for students with a timely filed H-1B change-of-status petition, bridging the period between OPT/STEM OPT expiration and the H-1B’s October 1 start date. Reporting on the 2026 rule indicates cap-gap protections remain in place.