The 90 day rule in immigration - changing status after you enter on a B-1/B-2
9 mins read | Sep 15, 2026
F-1 OPT TO H-1B GUIDE
Contributor
Tukki
Reading time
9 mins read
Date published
May 13, 2026
The OPT to H-1B transition is the most common path from a U.S. degree to long-term work authorization. It's also the most stressful one, because the H-1B is capped and selection is random. If you're an F-1 student or a recent grad weighing your odds, here's how the move actually works, what cap-gap really protects, and what your options look like if the lottery doesn't go your way.
F-1 students don't go straight from graduation to H-1B. There's a built-in bridge: Optional Practical Training, or OPT. Most graduates get 12 months of OPT employment authorization, and STEM degree holders can extend that by another 24 months for 36 months total. That window is what gives you one to three shots at the H-1B lottery before your work authorization runs out.
The H-1B is a nonimmigrant visa for specialty occupations, meaning roles that normally require at least a U.S. bachelor's degree (or foreign equivalent) in a field tied to the job duties. If your role and degree line up, OPT is what keeps you working legally while your employer registers you for the cap.
Here's what your work authorization runway actually looks like, and why timing matters for the H-1B lottery.
| Phase | Duration | Who qualifies |
|---|---|---|
| Standard OPT | 12 months | All F-1 grads with eligible degrees |
| STEM OPT extension | +24 months (36 total) | Bachelor's or higher in a DHS-approved STEM field, employer enrolled in E-Verify, signed Form I-983 training plan |
| Cap-gap extension | Up to ~5 months (until October 1) | F-1s with timely-filed, selected H-1B petitions |
The H-1B registration window opens once a year, typically in March, for jobs starting October 1. So your number of lottery attempts depends entirely on how your OPT start date lines up with March. A standard 12-month OPT often gives you exactly one attempt. A STEM OPT extension usually buys you two or three.
That makes STEM OPT eligibility one of the highest-leverage decisions you'll make as an F-1 student. If your major is on the DHS STEM list and your employer is in E-Verify, the extension can mean the difference between one or three years
The H-1B has a hard annual cap: 65,000 regular slots plus 20,000 reserved for holders of a U.S. master's degree or higher. Demand routinely exceeds supply by three to four times, which is why USCIS runs a lottery.
Here's how a single cycle plays out:
One detail worth flagging: the new beneficiary-centric rule was meant to stop fraud where one person was registered by 20 employers. It worked. The selection rate has stabilized closer to a true 25-30% range in recent cycles, instead of the inflated odds that gaming created.
Here's the linear path most F-1s walk through, from job offer to H-1B start date.
The big choice inside this process is change of status vs. consular processing. F-1s already in the U.S. usually choose change of status: the employer requests it on Form I-129, and on October 1 you're automatically in H-1B without leaving the country. Consular processing means traveling abroad for visa stamping at a U.S. consulate, which adds time and risk but is sometimes necessary if you'll need to travel internationally for work.

Cap-gap is the rule that keeps you legally working while you wait for October 1. Without it, F-1s whose OPT expires in, say, July would have a three-month gap with no work authorization, even though their H-1B is approved.
The cap-gap extension is automatic, but only if all three conditions are met:
When all three line up, your F-1 status and OPT employment authorization are automatically extended through September 30. Your designated school official (DSO) updates your I-20 to reflect the cap-gap, and you can keep working through the bridge.
A few things to watch for:
If your OPT expires after October 1 anyway, cap-gap is a non-issue: you just keep working on OPT until your H-1B start date.
The selection rate sits in the 25-30% range, so most registrants don't get picked on the first try. That stings, but it doesn't end your options. Here are the seven realistic paths forward:
The right move depends on your timeline, your employer's flexibility, and what your profile actually supports. None of these paths are quick, but most students who don't get selected on the first try eventually find one that works.
If you're on STEM OPT, you have more time but also more compliance obligations. Three things to track:
Job changes during STEM OPT are allowed, but they trigger paperwork: a new I-983 and DSO notification within 10 days of the change. Falling behind on reporting can put your status at risk, which makes the H-1B transition harder.
A few patterns we see go sideways:
For more on what happens once your petition is in, our guide to the H-1B process after the lottery walks through the steps from selection to October 1. And if your registration just got declined, our breakdown of what to do if you're not selected in the H-1B lottery covers the alternatives in more depth.
Tukki is a U.S. immigration provider focused on employment-based visas and green cards. Whether you're going through your first H-1B lottery as an F-1 student or weighing alternatives like O-1A or EB-2 NIW after a non-selection, Tukki offers dedicated attorney support and full case visibility from registration through approval.
WE CAN HELP
Need more clarity?
Find quick answers to frequent visa questions from our legal experts
How many employment-based work visa categories are there?
U.S. immigration groups employment-based green cards into five preference categories, EB-1 through EB-5, though most professional hiring runs through EB-1, EB-2, and EB-3. On the temporary side, the main employment-based visa types include the H-1B, L-1A, O-1, TN, and E-2.
So the practical answer is a handful of temporary categories plus three or four green card categories that cover the vast majority of cases.
Can I change jobs during the H-1B to green card process?
Yes, but the answer depends on which stage you're in. Before PERM is filed, you can change employers freely; the new employer just has to start a new PERM. After PERM is filed but before I-140 is approved, changing employers usually means starting PERM over.
After I-140 is approved and 180 days have passed since I-485 was filed, you can change to a new employer in the same or similar occupation under I-140 portability while keeping your priority date and pending I-485. Our H-1B visa transfer guide walks through the transfer mechanics.
Who pays for a US work visa, the employer or the employee?
For most employer-sponsored visas like the H-1B, the employer is legally required to pay certain fees, including the I-129 base filing fee, the ACWIA Training Fee, and the Fraud Prevention and Detection Fee.
The employer cannot pass these costs to the employee.
Premium processing fees can sometimes be paid by either party, depending on who benefits from faster processing.
Consular fees and travel costs are typically the employee’s responsibility.
What happens if our candidate isn't selected?
Selection is by unique beneficiary, and most registrations aren't picked, so plan for it. Common options include registering again next cap season, a cap-exempt employer such as a university or affiliated nonprofit, cap-gap via STEM OPT for eligible candidates, or a different category like the O-1A.
Each candidate's best path depends on their profile, so they work it out directly with the attorneys.
What happens if we never filed an amendment we should have filed?
The employee has been working under terms the approved petition does not cover, which is a compliance exposure for the employer and a status question for the employee. It typically surfaces at a site visit, at an extension filing, or at a green card stage.
Get it assessed and corrected rather than waiting for it to be found.
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