What happens if I'm unemployed during OPT?

90-day unemployment cap during OPT is cumulative. SEVP enforces via SEVIS reporting — DSOs must terminate SEVIS records when the cap is exceeded. STEM OPT adds 60 more days (150 total) for STEM extension period.

Can I change employers during OPT?

Yes — OPT is open work authorization. You can change employers without USCIS notification or new EAD. Update SEVIS via DSO with new employer details within 10 days of starting/leaving each role. Multiple concurrent jobs allowed.

Are F-1 students subject to FICA on OPT/CPT wages?

FICA exemption applies during F-1 non-resident-alien status. After the 5th calendar year, F-1 students typically become tax residents under SPT and FICA applies. OPT/CPT wages during the exempt period are FICA-free.

Can I travel internationally on OPT or CPT?

Yes for both, with documentation. OPT: carry valid passport, EAD, F-1 visa, I-20 with travel signature within 6 months, and proof of employment / job offer. CPT: same documents, with the I-20 showing CPT authorization endorsement. Re-entry depends on CBP officer review.

F-1 / OPT / CPT · OPT EXTENSION · OPT extension

OPT Extension: STEM 24-Month Add-On vs Cap-Gap (Different Mechanisms)

OPT extension in regulatory terms is the 24-month STEM OPT layered over the initial 12-month OPT — total 36 months of work authorization. Eligibility: STEM-designated CIP code, E-Verify-enrolled employer, completed I-983. Filing window opens 90 days before initial OPT EAD expires.

By Marcus Liang · Last verified · Tax year 2025

"OPT Extension" Has Two Common Meanings — Different Mechanisms

The phrase "OPT extension" is used loosely. Two distinct regulatory mechanisms can extend or bridge OPT employment authorization:

STEM OPT 24-Month Extension — under 8 CFR §214.2(f)(10)(ii)(C). Adds 24 months to the standard 12-month post-completion OPT for students with STEM-designated CIP codes at E-Verify employers. This is what most people mean by "OPT extension" in technical terms.
Cap-Gap Extension — under 8 CFR §214.2(f)(5)(vi). Automatic extension of F-1 status and OPT EAD through October 1 (or until the H-1B petition is approved/denied) for F-1 students with timely-filed cap-subject H-1B petitions.

These are different mechanisms. STEM extension is a separate USCIS filing for additional employment authorization. Cap-gap is automatic at H-1B receipt and bridges to October 1 — it does not add months to OPT.

STEM OPT Extension Eligibility

To qualify for the 24-month STEM OPT extension:

Degree on the DHS STEM Designated Degree Program List. The DHS STEM-CIP list at studyinthestates.dhs.gov/stem-opt-hub identifies eligible CIP codes. Common STEM CIPs: 11.xxxx (computer science), 14.xxxx (engineering), 26.xxxx (biology), 40.xxxx (physical sciences). CIP code on your I-20 controls eligibility — not the program name.
Currently in valid post-completion OPT. Pre-completion OPT does not qualify; you must be on the standard 12-month post-completion OPT.
E-Verify-enrolled employer. Verify employer's E-Verify enrollment via the employer's own QR code or the DHS E-Verify employer search. Self-employment without an E-Verify employer-of-record does not qualify.
Form I-983 Training Plan. Signed by the beneficiary and the employer's designated official. Documents training objectives, supervision, evaluation, and how the role advances the beneficiary's STEM field.
Bachelor's, master's, or doctoral STEM degree. A second eligible STEM degree at a higher level can also unlock a fresh 24-month STEM extension period.

Filing Window and the 540-Day Auto-Extension

90-Day Pre-Expiration Window

File Form I-765 with category (c)(3)(C) in the 90-day window before your initial 12-month OPT EAD expires. Filings earlier than 90 days are rejected; filings after expiration are denied. The DSO must recommend STEM OPT in SEVIS within 60 days of the I-765 filing date.

540-Day Auto-Extension

Per the April 2024 DHS rule, timely-filed I-765 renewals (including STEM OPT extensions) trigger automatic work-authorization continuation for up to 540 days while the application is pending. Practical effect: your existing OPT EAD does not gap to the new STEM EAD because work authorization continues automatically.

What "Timely Filed" Means

Filed within the 90-day window before EAD expiration AND received by USCIS before the EAD expiration date. A filing rejected for procedural defects loses timely-filed status — re-filings after EAD expiration may not qualify for the 540-day auto-extension.

Form I-983 — The Centerpiece of the STEM Filing

Form I-983 is the STEM OPT Training Plan. It is the document USCIS reviews most closely. Vague or templated I-983s draw RFEs.

I-983 Components

Section 1: student information, degree, CIP code.
Section 2: employer information, E-Verify number.
Section 3: training plan — objectives, methods, evaluation. This section drives RFE risk.
Section 4: employer attestation about training, oversight, compensation.
Section 5: student attestation.
Section 6: evaluation cadence (12 and 24 months) — separate evaluations submitted to the DSO.

Material-Change Updates

Material changes during STEM OPT — new employer, new role, significant scope change — require an updated I-983 within 10 days. The DSO updates SEVIS. Failure to report material changes can result in SEVIS termination.

SEVIS Reporting Cadence

STEM OPT requires periodic SEVIS reports to the DSO:

Address / employer-change reports: within 10 days of any change.
6-month validation report: confirms continued employment, training, and address.
12-month evaluation: I-983 Section 6 evaluation by the employer.
18-month validation: routine status check.
24-month final evaluation: I-983 Section 6 evaluation at end of STEM OPT period.

Missed reports can lead to SEVIS termination and loss of F-1 status.

Cap-Gap — A Different Bridge

Cap-gap is automatic, not applied for. It applies when a cap-subject H-1B petition is timely filed by an employer in March-April for an F-1 student in valid F-1 status (or post-completion OPT). If the H-1B is selected and approved with a change-of-status request, F-1 status and OPT EAD automatically extend through September 30 — bridging to the October 1 H-1B effective date.

Cap-gap is mechanically separate from STEM extension. A student can use both (STEM extension to bridge another cap cycle, then cap-gap when finally selected).

Cross-Pillar Reading

Bottom line

OPT extension only exists in one regulatory form — the STEM OPT 24-month extension. Plan it from the moment your F-1 starts: STEM-designated CIP, E-Verify employer, Form I-983 quality, and SEVIS reporting cadence determine whether the extension lands cleanly.

Frequently asked questions

What happens if I'm unemployed during OPT?: 90-day unemployment cap during OPT is cumulative. SEVP enforces via SEVIS reporting — DSOs must terminate SEVIS records when the cap is exceeded. STEM OPT adds 60 more days (150 total) for STEM extension period.
Can I change employers during OPT?: Yes — OPT is open work authorization. You can change employers without USCIS notification or new EAD. Update SEVIS via DSO with new employer details within 10 days of starting/leaving each role. Multiple concurrent jobs allowed.
Are F-1 students subject to FICA on OPT/CPT wages?: FICA exemption applies during F-1 non-resident-alien status. After the 5th calendar year, F-1 students typically become tax residents under SPT and FICA applies. OPT/CPT wages during the exempt period are FICA-free.
Can I travel internationally on OPT or CPT?: Yes for both, with documentation. OPT: carry valid passport, EAD, F-1 visa, I-20 with travel signature within 6 months, and proof of employment / job offer. CPT: same documents, with the I-20 showing CPT authorization endorsement. Re-entry depends on CBP officer review.