OPT unemployment days: how the count actually works

Short answer: 90 aggregate calendar days during post-completion OPT, and a combined 150 if you move onto the STEM extension. The regulation is one sentence; the counting is where students get hurt. 8 CFR 214.2(f)(10)(ii)(E)

The two limits, precisely

• Post-completion OPT: 90 days of unemployment, aggregate, across the entire authorization.
• STEM extension: 60 more, for a combined aggregate of 150 — the 90 you may have used on regular OPT carry forward. A student who burned 80 days before STEM starts the extension with 70 in the tank, not 60.

What stops the clock

Qualifying employment: work directly related to your degree, at least 20 hours per week. On regular post-completion OPT this can be paid or unpaid (a genuine unpaid internship or volunteering in your field, 20+ hours, counts), can be multiple part-time jobs stacked to 20 hours, and can be self-employment or 1099 contracting in your field. On the STEM extension the bar rises: paid, E-Verify employer, bona fide employer-employee relationship — the flexible arrangements that worked on regular OPT mostly don't.

Counting traps from real cases

1. There is no free 10-day gap between jobs. The 10-day rule you've read about is a reporting deadline (how fast you must report changes), not a counting exemption. Days between job A and job B count.
2. The count starts on your EAD start date, not your first job. A slow job search at the front of OPT burns the same days a layoff does at the end.
3. Approval-period unemployment counts even if you feel employed. An offer letter for a job starting next month doesn't stop the clock; work does.

What your DSO actually sees

SEVIS shows the accrued unemployment number on the student record, and it shows it to your DSO and to SEVP. When the number approaches the limit, records get attention. The useful move isn't hiding the gap — it's reporting real qualifying work promptly and asking your DSO to sanity-check the record's math against your own.