OPT is one of the most important aspects of studying in the US — and one of the most mishandled. USCIS processing times of 3–5 months mean students who wait until graduation to apply spend months without authorisation to work, burning through their 12-month window. The students who handle OPT correctly apply 90 days before their programme ends and have their Employment Authorisation Document (EAD) in hand around graduation day.
The single most important rule: contact your DSO (Designated School Official) no later than 4 months before your graduation date. The OPT process takes time you won't have if you wait until you receive your diploma.
What OPT is — and what it isn't
Optional Practical Training (OPT) is a period of authorised temporary employment directly related to your major area of study. It's not an employer-specific work permit — once you have your EAD, you can work for any employer in a role that relates to your field of study. You can also be self-employed or do consulting work, as long as it's related to your degree.
Standard OPT gives you 12 months. If you have a STEM degree (science, technology, engineering, mathematics), you can apply for a 24-month extension — giving you 36 months total. The STEM extension requires your employer to be enrolled in E-Verify.
What Is the OPT Application Timeline?
What Is the 90-Day Unemployment Rule?
During standard OPT, you're allowed a maximum of 90 days of unemployment (days when you're not working in a qualifying role). During the 24-month STEM extension, the limit drops to 150 days cumulative (including the 90 from standard OPT).
STEM OPT: what your employer must do
The STEM OPT extension has employer requirements that go beyond standard OPT. Your employer must be enrolled in E-Verify, complete a Training Plan (Form I-983) with you, provide a mentoring programme, and report your progress to your DSO. If your employer can't meet these requirements — many startups and small businesses can't or won't — you can't use the STEM extension at that employer.
FreeStudentTools recommends asking potential employers about their E-Verify status and STEM OPT experience before accepting an offer. A company that has hired F-1 students before and has HR familiar with the process is significantly less risky than one that hasn't. Large companies, universities, hospitals, and tech companies are typically well-versed in this.
Beyond OPT: the H-1B path
OPT is a bridge, not a destination. The next step for most F-1 graduates is the H-1B (specialty occupation) visa. H-1B is subject to an annual lottery (65,000 regular cap + 20,000 master's cap). The lottery runs in April for fiscal year starting October. Your employer must file the petition in March.
The H-1B lottery approval rate has ranged from 26–40% in recent years — it's not guaranteed. This is why STEM OPT's 36 months matters: it gives you three lottery opportunities instead of one, significantly improving your chances of obtaining H-1B.
For comparison with other countries' post-study work pathways, see our guides on the UK Graduate Route, Canada PGWP, and Germany post-study visa.