A graduate offer from a US employer can look straightforward until one question changes the timetable: when are you actually authorised to start work? OPT work authorisation is not granted by a job offer, a completed degree, or an employer’s confidence that paperwork will follow. You must hold the correct Employment Authorisation Document, known as an EAD, before beginning qualifying employment.
For international students, the consequences of getting this wrong can be serious. A late filing may remove the opportunity to work after graduation. Work started before the EAD validity date can breach F-1 status. A role that is not genuinely related to the degree may create problems in a later visa or green card application, when prior immigration compliance is examined closely.
What OPT work authorisation permits
Optional Practical Training, or OPT, is temporary employment authorisation for eligible F-1 students. It must be directly related to the student’s major area of study. It is not a general right to take any US job after university, and it is not an employer-sponsored visa.
Most students have up to 12 months of OPT at each higher educational level. A student who used OPT after a bachelor’s degree may therefore still have a separate period available after a master’s degree. However, any full-time pre-completion OPT used at the same level is deducted from the total at a full-time rate. Part-time pre-completion OPT is deducted at half that rate.
There are two principal forms. Pre-completion OPT is undertaken while the student is still studying. Post-completion OPT begins after the programme end date and is the route most graduates use when moving into full-time work. Eligible graduates in designated science, technology, engineering and mathematics fields may later seek a 24-month STEM OPT extension, potentially producing up to 36 months of work authorisation in total.
The distinction matters because the timing rules, work patterns and unemployment limits are not identical. A plan based on assumptions rather than the specific OPT category can fail before the application reaches USCIS.
The timing rules that decide the case
For post-completion OPT, an F-1 student may file Form I-765 up to 90 days before the programme end date and no later than 60 days after it. There is an additional rule that frequently causes avoidable refusals: USCIS must receive the application within 30 days of the Designated School Official, or DSO, entering the OPT recommendation in SEVIS.
Those are separate deadlines. Filing within 60 days of graduation is not enough if the DSO recommendation is already more than 30 days old when USCIS receives the application. A student should check the dates on the new I-20 carefully rather than relying on an adviser’s verbal indication that the request has been submitted.
Post-completion OPT also requires the applicant to choose a requested start date. That date must fall within the permitted post-completion period, but the EAD cannot be assumed to arrive by the preferred date. Processing delays can affect an employer’s start plans, particularly where an offer is conditional on a fixed onboarding date.
Pre-completion OPT has different practical constraints. It may be part-time while classes are in session and can be full-time during annual holiday periods. Students must remain eligible to continue their course and maintain their F-1 obligations. For postgraduate students whose programme does not require a year or more of study, the academic-year requirement can operate differently, so individual advice from the school’s international office remains essential.
Employment must be real, related and documentable
The central test is not whether a job title sounds impressive. The work must be directly related to the degree programme. A computer science graduate working in software development may have a clear explanation. A role described vaguely as ‘business assistant’ may require a more careful analysis, particularly if the degree and duties do not naturally connect.
Keep evidence that explains the relationship: the offer letter, detailed job description, supervisor details, dates, hours, payroll records where applicable, and a short written explanation of how the duties use knowledge acquired through the degree. This record may be valuable long after OPT ends. Immigration history often becomes relevant when applying for H-1B status, an O-1 visa, a family-based green card or another immigration benefit.
Regular post-completion OPT does not require a single conventional salaried employment arrangement in every case. Paid work, multiple roles, self-employment and certain unpaid practical experience may be possible where the arrangement is genuine and satisfies immigration and employment-law requirements. That flexibility is not permission to create a paper role simply to stop the unemployment clock. A credible position has defined duties, genuine supervision or business activity, and evidence of the work performed.
Students on post-completion OPT may not accrue more than 90 days of unemployment. The calculation deserves active monitoring, especially between short contracts or while waiting to begin a new role. Report employment and address changes through the required school or SEVIS process promptly. An unreported change is not a harmless administrative detail.
STEM OPT demands more from both graduate and employer
A STEM extension is not automatic merely because the degree appears technical. The qualifying degree must be on the relevant STEM list, the employer must participate in E-Verify, and the parties must complete Form I-983 training plan. The employment must generally be paid and involve at least 20 hours per week with each qualifying employer.
The I-983 is more than a formality. It requires a credible account of the training objectives, employer oversight, evaluation and relationship between the role and the STEM degree. Employers must also accept reporting and compliance duties. A small company can sponsor STEM OPT, but it must be capable of providing real training, supervision and an appropriate employer-employee structure.
A graduate using the STEM extension has up to 150 days of unemployment across the initial OPT and extension periods combined. Material changes, including a new employer, significant reduction in hours or major change in training objectives, may require a revised training plan and reporting. Treat those obligations as part of maintaining status, not as paperwork to revisit at the end of the extension.
Travel, status expiry and the next visa strategy
Travel while an OPT application is pending or after completing a course can carry risk. Re-entry depends on the full facts, including the stage of the application, the documents held, continuing F-1 eligibility, evidence of employment where relevant, and the discretion of the inspecting officer. An EAD application receipt is not a travel document and does not guarantee admission.
The 60-day F-1 grace period after programme completion is also often misunderstood. It may permit preparation for departure, transfer to a new programme or certain status steps, but it is not work authorisation. Nor does it repair a missed OPT filing deadline.
For many graduates, OPT is a bridge rather than the final plan. Employers considering H-1B sponsorship need sufficient lead time for the registration process and any later petition. Where a timely filed H-1B petition is selected and requests a change of status, cap-gap rules may in some circumstances extend F-1 status and work authorisation. The details are technical and depend on filing timing and the form of the petition. Do not promise an employer that cap-gap will apply without checking the position first.
Some graduates should consider alternatives early, particularly where they have exceptional achievements, a multinational employer, a treaty-country nationality, investment plans or a spouse with independent US immigration options. The right long-term route may be H-1B, O-1, L-1, E-2, employment-based permanent residence or a family-based pathway. The strongest strategy is the one that fits the person’s evidence and commercial reality, not the visa category most commonly discussed online.
Build the record before accepting the role
Before committing to a start date, confirm your programme end date, OPT type, prior OPT usage, I-20 recommendation date and intended employment structure. Ask the employer whether it can accommodate a delayed EAD start, whether it uses E-Verify if STEM OPT is relevant, and whether it can provide a detailed account of the role and supervision.
For UK and international graduates, the greater risk is often not a lack of eligibility but a weak timeline or weak evidence trail. Informal reassurance from an employer, a fellow student or an online forum cannot replace a review of the immigration record and proposed role. Where the job, travel plans or longer-term visa strategy is commercially important, obtain advice before the filing window closes.
A carefully prepared OPT plan gives you more than permission to begin work. It preserves credibility for the immigration decisions that may determine whether the United States remains a temporary opportunity or becomes a durable professional base.
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