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Below you'll find out most frequently asked questions about US visas,
categorized by visa type, with our lawyers' answers.
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Can I apply for a green card while on a student visa (F-1)?
Yes, but it depends on your situation. Some students transition to a work visa (like O-1 or H-1B) and later to a green card.
Others may qualify directly for categories like EB-1 or marriage-based green cards.
Keep in mind that the F-1 visa does not allow “dual intent,” so timing and strategy are very important.
How does the H-1B lottery work for F-1 students?
There is no separate lottery process for F-1 students.
They enter the same capped H-1B lottery as other applicants.
If an F-1 student holds a U.S. master’s degree or higher, they benefit from two chances: one under the regular cap and another under the master’s cap.
Is there a filing fee for Form G-28?
No. Form G-28 has no filing fee.
USCIS accepts it at no cost.
Your immigration attorney may charge their own professional fees for representing you, but the form itself is free to submit alongside your visa application, petition, or appeal.
What is the difference between Form G-28 and Form G-28I?
Form G-28 is used for immigration matters before USCIS within the United States.
Form G-28I is a separate form used for matters outside the U.S., and it allows a broader range of representatives to file, including attorneys who are not licensed in the U.S. and certain family members.
If your case is handled domestically by USCIS, your attorney will use the standard G-28.
Do I need a new Form G-28 for every case I file?
Yes. USCIS requires a new Form G-28 for each separate application, petition, or appeal.
Even if the same attorney is handling multiple filings for you, they must submit a new G-28 with each one.
The form applies only to the specific case it is filed with and does not carry over to other matters.
Can I represent myself instead of using Form G-28?
Yes. You are always allowed to represent yourself before USCIS.
Form G-28 is only necessary when you want a licensed attorney or accredited representative to act on your behalf.
If you choose to handle your own visa process, USCIS will communicate directly with you.
However, for complex petitions or cases involving RFEs, many foreign nationals find that working with an immigration attorney leads to better outcomes.
Can a worker file Form I-129 on their own behalf?
No. Form I-129 must be filed by the U.S. employer acting as the petitioner.
The foreign national beneficiary cannot self-petition.
The employer is responsible for completing the form, paying the filing fees, and providing supporting documentation to USCIS.
How long does it take USCIS to process Form I-129?
Standard processing time for I-129 petitions is typically between 2 and 8 months, depending on the service center and visa category.
With premium processing (Form I-907), USCIS guarantees a response within 15 business days.
Processing times can change, so it is recommended to check the USCIS processing times page for current estimates.
What is evidence of approved I-129 status?
When USCIS approves an I-129 petition, they issue Form I-797, Notice of Action.
This approval notice serves as official evidence of the approved I-129 status.
The beneficiary may use it for visa stamping at a U.S. consulate or to document their authorized stay if already in the United States.
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.
Which U.S. work visas allow dual intent?
Dual intent means you can hold a temporary visa and pursue a green card at the same time without raising questions about your intent to leave. The H-1B and L-1A clearly allow dual intent, which is why they're popular starting points for a longer plan.
The O-1 is treated flexibly in practice, while the TN and E-2 are tied more closely to temporary stay, so a green card plan on those needs careful documentation.
Which work visas do not require an employer sponsor?
Among green cards, the EB-1A (extraordinary ability) and EB-2 NIW (national interest waiver) allow self-petition, so the individual files without an employer or a PERM labor certification. The E-2 doesn't use a traditional employer either, since it's based on the applicant's own investment.
Every other major work visa, including the H-1B, L-1A, O-1, TN, and the standard EB-2 and EB-3 green cards, requires an employer or a job offer.
Which work visas lead directly to a green card?
The immigrant categories, EB-1A, EB-1C, EB-2 NIW, and EB-2 or EB-3 through PERM, lead directly to a green card. The temporary work visas don't grant permanent residence on their own, but several act as bridges.
An H-1B holder can move through PERM to EB-2 or EB-3, an L-1A manager to the EB-1C, and an O-1A performer to the EB-1A.
What is the fastest U.S. work visa to get?
For eligible candidates, the visas without a lottery or labor certification tend to move fastest. The O-1 and L-1A have no annual cap, so a qualified case can be filed at any time, and the TN can sometimes be obtained at the border for Canadian citizens within days.
Speed also depends on whether premium processing is used, which guarantees USCIS action within 15 business days for an added fee, so the right answer depends on the candidate's profile and how urgently you need them.
Can a PhD student file an NIW before graduating?
Yes, if you already meet an EB-2 basis at the time you file Form I-140. Because your doctorate isn't conferred yet, the petition can't rely on the PhD itself, so it has to stand on a conferred master's, a bachelor's plus five years of progressive experience, or exceptional ability.
Once one of those is in place, you can self-petition mid-program and lock in a priority date.
Is it better to file the NIW during or after the PhD?
It depends on whether you have a qualifying EB-2 basis now and how backlogged your country is. If you have a solid basis and face a long EB-2 line, filing during the program secures an earlier priority date while your record keeps growing.
If your case leans mostly on the PhD or your evidence is still thin, waiting until conferral can produce a stronger petition.
Can I keep working on OPT while my NIW is pending?
Yes. A STEM PhD on F-1 can typically work on OPT and the 24-month STEM OPT extension while the NIW I-140 is pending, and you can pursue H-1B at the same time.
The NIW is a separate filing, so it runs in parallel with your work authorization rather than replacing it.
How does filing the I-140 affect my place in the green card line?
Filing Form I-140 establishes your priority date, which is your spot in the queue for permanent residence. Because every country currently faces an EB-2 backlog, an earlier priority date means more time accruing while you wait, which is a core reason candidates from India and China often file as soon as they have a valid basis.
Check the current Visa Bulletin for cut-off dates.
What happens if my OPT EAD expires before the STEM extension is approved?
If you filed your STEM OPT I-765 on time, meaning before your current OPT EAD expired, your work authorization is automatically extended for up to 180 days while USCIS reviews the case. You can keep working during that window even though your physical EAD card shows an expired date.
The protection depends entirely on having filed on time, so build in margin and file as early as the 90-day window allows.
Can I travel internationally during STEM OPT?
You can travel, but the timing and your documents matter. Generally you'll want a valid EAD, a valid F-1 visa stamp, and a recently signed I-20 with the STEM travel endorsement from your DSO before you leave.
Travel while your I-765 extension is still pending carries more risk, so check with your DSO and an attorney before booking, since a denied reentry can undo your status.
Does the STEM OPT extension require its own degree, or can I use my prior degree?
You can sometimes use a prior STEM degree to qualify, even if your most recent degree isn't on the DHS STEM Designated Degree Program List. The degree you rely on must come from an accredited, SEVP-certified U.S. institution and be at the same or higher level.
Your DSO can confirm whether a previous degree supports your extension before you file.
Is there a faster way to get the STEM OPT EAD processed?
USCIS offers a premium processing option for some I-765 filings, which commits the agency to a faster response for an added fee. Whether it's available for your category and the current cost both change over time, so confirm them on the USCIS fee schedule rather than an older figure.
For many students, filing early in the 90-day window plus the 180-day auto-extension covers the wait without paying extra.
What happens if my STEM OPT is denied?
Your STEM OPT work authorization ends on the date of the denial, so you must stop working. If you were otherwise maintaining valid F-1 status, current USCIS framing gives you a 60-day grace period from the denial date to change status, transfer, change education level, or prepare to depart.
If the denial was because you had already fallen out of F-1 status, that grace period does not apply and you are expected to leave the U.S. promptly. Read your denial notice to see which situation applies to you.
How long can I stay in the U.S. after a STEM OPT denial?
Generally 60 days from the date of the denial, if you were in valid F-1 status when the decision was issued. That grace period is the time to file a motion, apply for reinstatement, change to another status, or arrange departure.
If the denial resulted from a prior failure to maintain status, there is no 60-day grace period. Because the counting is fact-specific, confirm your exact deadline against the notice and, where possible, with an attorney.
Can I appeal a STEM OPT denial?
There is no standard appeal for an OPT denial, but you can file a motion to reopen or reconsider on Form I-290B when the denial rested on an error. A motion to reopen introduces new facts or evidence; a motion to reconsider argues the law was applied incorrectly.
The deadline is generally 30 calendar days from the date the decision was served, or 33 if USCIS mailed it, counted from the notice date rather than the day you received it.
Can I apply for reinstatement after falling out of F-1 status?
In many cases yes, using Form I-539 with a new Form I-20 recommending reinstatement from your DSO. You generally must not have been out of status more than five months when you file, must not have worked without authorization, must intend to resume a full course of study, and must show the violation came from circumstances beyond your control.
A denied reinstatement cannot be appealed, though a motion may be available, so the application should be strong on the first filing.
Can I switch to an H-1B after a STEM OPT denial?
It can be possible if you have a sponsoring employer and secure a cap-subject registration and selection, or qualify for a cap-exempt H-1B. The cleaner path is filing a change of status while you are still inside your grace period and lawfully present.
Our OPT to H-1B transition guide covers the cap, the lottery, and the cap-gap timing that shapes whether this route fits your calendar.
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