How US Immigration Works: A Plain-English Guide for 2026

Every non-citizen in the US is either a nonimmigrant or an immigrant.

• Nonimmigrants come for one purpose and a limited time. There are dozens of categories, named by letters: B for visitors, F for students, H-1B for specialty workers, L for company transfers, O for extraordinary ability, and so on. Most require you to intend to leave when your stay ends. A few, such as the H-1B and L-1, allow dual intent, meaning you can pursue a green card at the same time.
• Immigrants are lawful permanent residents, or green card holders. They can live and work in the US indefinitely and, after 5 years (3 if married to a citizen), apply for citizenship.

Read temporary vs permanent residency for how the two compare across the US, Canada, and Mexico.

• Petition: a form filed to prove you qualify, usually by a sponsor. Examples: I-130 (family), I-129 (temporary workers), I-140 (employment green cards).
• Petitioner and beneficiary: the sponsor and the person being sponsored.
• Priority date: your place in line for a capped green card category, usually the date your petition was filed. See priority dates.
• Visa Bulletin: the State Department's monthly chart of which priority dates can move forward. See the Visa Bulletin explained and our tracker.
• Adjustment of status: getting a green card inside the US on Form I-485. See adjustment of status.
• Consular processing: getting an immigrant visa at a US consulate abroad. See consular processing.
• I-94: your arrival record, which shows your status and the date your authorized stay ends.
• EAD: Employment Authorization Document, a work permit. See EAD work permit.
• Advance parole: permission to travel and return while certain applications are pending. See advance parole.

Most people follow some version of this path:

1. Find a category that fits your goal and background. Our hubs cover work, study, family, investment, and green cards.
2. A sponsor files a petition, or you file one for yourself in a few categories (such as EB-1A or EB-2 NIW).
3. Wait for approval, and, in capped green card categories, for your priority date to become current.
4. Apply for the visa or green card: at a consulate, usually with an interview, or through adjustment of status if you are already in the US and eligible.
5. Enter the US and check your I-94.
6. Keep your status by following its rules, and extend or change status on time when needed.

Congress sets yearly limits: about 226,000 family preference green cards and about 140,000 employment-based green cards, and no single country can use more than about 7% of the total. Demand from some countries, especially India, China, Mexico, and the Philippines, is far higher than their share, so people born there can wait many years or even decades.

Immediate relatives of US citizens (spouses, unmarried children under 21, and parents of adult citizens) are not counted against these limits, which is why their cases move faster. Some temporary categories also have caps, such as the H-1B lottery and the H-2B program.

• Watch your I-94 date, not your visa date. A visa can be valid for years while your permitted stay is only months.
• Unlawful presence has long-term costs. Staying more than 180 days past your authorized date and then leaving triggers a 3-year bar on returning; more than 1 year triggers a 10-year bar. Some waivers exist. See visa denials and waivers.
• Do only what your status allows. Working without authorization, or studying full time on a visitor visa, violates status.
• Be honest. Misrepresentation on any form or at the border can make you permanently inadmissible.
• Answer requests quickly. If USCIS sends a request for evidence, respond by the deadline. See RFEs and NOIDs.

Several 2026 policies affect nearly every applicant: a travel ban covering 39 countries, a worldwide freeze on immigrant visa interviews since August 25, 2026, a May 2026 USCIS memo limiting adjustment of status for people on temporary visas, a new public charge rule, and a paused Diversity Visa lottery. Check the USA Status Now page before you file, and talk to a licensed immigration lawyer or a DOJ-accredited representative if your case is complex. See how to verify a lawyer.