The Complete Investment Hub

The U.S. immigration system is one of the most complex bureaucracies in the federal government, governing who can visit, study, work, invest, live, and naturalize in the United States. It runs across multiple agencies, processes millions of applications per year, and operates on rules that change with each administration, each visa bulletin, and each policy memo. For the people inside it—applicants, sponsors, employers, and family members—the stakes are existential: the right visa can mean a career and a future in the U.S.; a wrong step can mean a 10-year ban from re-entering.

This hub brings together our immigration pre-screeners and in-depth guides so you can understand your options before you spend thousands on forms, medical exams, and attorney fees. Every tool here is educational—not a substitute for legal advice from a licensed immigration attorney—but the right preparation can save you months of delay and reduce the risk of an avoidable denial.

Who this hub is for

This hub serves five common situations:

• Prospective students evaluating F-1 visas, OPT, and the path from study to work to green card.
• Skilled workers considering H-1B, L-1, O-1, or TN sponsorship and the path to permanent residency.
• Family members of U.S. citizens or green card holders exploring family-based sponsorship.
• Investors and entrepreneurs evaluating E-2, L-1A, EB-5, or the International Entrepreneur Rule.
• Green card holders preparing for naturalization, or people who recently naturalized and need to understand their new obligations.

Pick the pre-screener that matches your situation, then read the matching guide for the framework and timeline.

The four agencies you will interact with

U.S. immigration is not a single agency. Knowing which one handles which step saves you time and prevents you from sending the wrong form to the wrong place:

1. USCIS (U.S. Citizenship and Immigration Services)—processes most immigration benefits inside the U.S.: family and employment petitions, adjustment of status, naturalization, asylum, work permits. Most forms starting with "I-" or "N-" go here.
2. DOS (Department of State)—operates U.S. embassies and consulates abroad, issues visas, and runs the Diversity Visa (green card) lottery. The monthly Visa Bulletin that determines when green card applicants can file comes from DOS.
3. DOL (Department of Labor)—handles labor certifications (PERM) and labor condition applications (LCAs) required before many employment-based visas and green cards.
4. CBP (Customs and Border Protection)—inspects you at the port of entry, decides whether to admit you, and issues your I-94 arrival/departure record.

ICE (Immigration and Customs Enforcement) and EOIR (Executive Office for Immigration Review, the immigration courts) handle enforcement and removal proceedings—agencies you never want to interact with directly.

Non-immigrant vs. immigrant visas

The single most important distinction in U.S. immigration is between non-immigrant visas (temporary, with intent to return home) and immigrant visas (permanent, leading to a green card). Mixing them up is the most common cause of denial at the consulate. A B-1/B-2 visitor who tells the consular officer they plan to marry a U.S. citizen and stay will be denied for "immigrant intent." An H-1B worker with an approved I-140 (immigrant petition) who travels abroad for an H-1B visa stamp can generally re-enter because H-1B is "dual intent." Knowing which category your visa falls into—and what intent you must demonstrate—prevents most avoidable denials. Read our visa denial guide for the full list of pitfalls.

Visa categories at a glance

The U.S. immigration system has more than 80 visa categories, but four families cover the vast majority of cases:

Our family-based guide, employment sponsorship guide, and H-1B eligibility guide walk through each path in detail.

The green card process

There are two main routes to a green card: consular processing (you are outside the U.S. and apply through a consulate) and adjustment of status (you are inside the U.S. on a valid non-immigrant visa and apply via USCIS). Both end with the same permanent resident card, but the forms, fees, and timelines differ.

For most family-based and employment-based cases, the process has three stages:

1. Petition—A U.S. citizen or green card holder family member files Form I-130 (family) or an employer files Form I-140 (employment). This establishes the qualifying relationship. Approval does not give you a green card—it just places you in line.
2. Visa bulletin and priority date—Your place in line is set by your "priority date," the date USCIS received your petition. Each month, the DOS publishes a Visa Bulletin showing which priority dates are current for each category and country. Some categories are "current" (no wait); others have waits of months to decades.
3. Application for permanent residence—Once your priority date is current, you either file Form I-485 (adjustment of status, inside the U.S.) or proceed with consular processing (DS-260, outside the U.S.). This stage includes biometrics, a medical exam, an interview, and the final decision.

For spouses, parents, and unmarried children under 21 of U.S. citizens, the wait is typically zero—visas are immediately available. For siblings of U.S. citizens, the wait can exceed 15 years. For employment-based categories, most are current except for EB-2 and EB-3 for applicants born in India or China, which can have multi-year backlogs. Read our green card process guide for the full framework.

The most common forms

Immigration forms are designated by letter prefixes that signal which agency and what type of benefit:

• I-90—Green card renewal / replacement.
• I-130—Family-based petition (the starting form for most family green cards).
• I-140—Employment-based immigrant petition.
• I-485—Adjustment of status (the final green card application for those inside the U.S.).
• I-765—Employment Authorization Document (work permit).
• I-131—Advance Parole (travel authorization while an I-485 is pending).
• I-129—Non-immigrant worker petition (H-1B, L-1, O-1, TN).
• N-400—Application for naturalization.
• DS-160—Non-immigrant visa application (filed at a consulate).
• DS-260—Immigrant visa application (consular processing for green card).

Filing the wrong form, an outdated form edition, or omitting a required supplement is one of the most common reasons for rejection. Always download the current form edition directly from USCIS.gov and check the edition date in the lower-right corner.

The path to citizenship

Most green card holders can naturalize after five years (three years if married to and living with a U.S. citizen). The requirements, in brief:

• Continuous residence in the U.S. for the statutory period (trips abroad under six months are usually fine; trips over six months can break continuity).
• Physical presence for at least half the statutory period (30 months out of 60, or 18 months out of 36).
• Good moral character (no disqualifying criminal history, taxes filed, child support paid).
• Basic English and civics knowledge (with exceptions for age and long-term residency).
• Attachment to the Constitution and willingness to take the Oath of Allegiance.

The naturalization process involves filing Form N-400 ($760 fee as of 2024), biometrics, an interview with English and civics tests, and the Oath Ceremony. Our citizenship test guide covers the 100 civics questions, English requirements, and exemption rules.

The visa bulletin and priority dates

For anyone in a visa category with annual caps—typically family-based preference categories and employment-based EB-2 and EB-3 for applicants born in India or China—the monthly Visa Bulletin from the Department of State is the single most important document in your case. It determines when you can file Form I-485 (adjustment of status) or move forward with consular processing.

Your priority date is the date USCIS received your underlying petition (I-130 for family, I-140 for employment). Each month, DOS publishes two charts: Final Action Dates (when a visa number is actually available) and Dates for Filing (when you can submit your application for processing). When your priority date is "current" on the Final Action chart, USCIS can approve your green card. Tracking the bulletin monthly is essential—missing a window can mean waiting another year.

The waits can be long. Siblings of U.S. citizens (F-4 category) typically wait 15+ years. EB-3 for applicants born in India currently has waits exceeding a decade. Spouses and unmarried children under 21 of U.S. citizens have no wait—the visa is immediately available. Knowing which category you fall into and what the current wait looks like is the foundation of any serious immigration plan.

Common immigration mistakes

The mistakes that derail immigration cases are almost always procedural, not substantive. Avoid these and your odds of approval improve dramatically:

• Missing deadlines. USCIS deadlines are firm. Filing late can mean starting over or losing status entirely. Track every deadline in two calendars.
• Submitting insufficient evidence. A marriage-based green card with no joint lease, no joint bank accounts, and no photos together will get an RFE (Request for Evidence) or a denial. Front-load your application with strong evidence.
• Using an outdated form edition. USCIS rejects older editions outright. Always verify the form date before mailing.
• Working without authorization. Working on a B-1/B-2 visitor visa or before your H-1B starts is one of the most common status violations and can trigger a 3- or 10-year ban.
• Traveling while an I-485 is pending without Advance Parole. Doing so abandons your adjustment application. Always get Advance Parole (Form I-131) approved before leaving.
• Misrepresenting facts. A material misrepresentation—even years later—can result in a lifetime ban. When in doubt, disclose. Disclose voluntarily and explain.
• Not consulting an attorney for complex cases. Criminal history, prior visa denials, prior immigration violations, or out-of-status time all warrant an attorney. DIY is fine for clean cases; risky for anything else.
• Trusting "notarios." In many Latin American countries, a notario is an attorney. In the U.S., a notary public is not. Thousands of immigrants lose money and status to fake "immigration consultants" every year. Use a licensed attorney or a BIA-accredited representative.

How to find reputable immigration help

Free or low-cost help is available, but you have to know where to look:

1. AILA (American Immigration Lawyers Association)—member directory at aila.org. Filter by specialty and location.
2. EOIR-recognized nonprofits—organizations accredited by the Executive Office for Immigration Review to provide low-cost legal help. Search the DOJ-EOIR Recognized Organizations list.
3. Law school immigration clinics—many top law schools run clinics that take cases for free under faculty supervision.
4. Your state bar association—verify any attorney's license and discipline history before hiring.
5. USCIS.gov—free official information, form downloads, and the field office locator. Start here before paying anyone.

Red flags: anyone who guarantees a result, refuses to put fees in writing, pressures you to file immediately, or claims special connections with USCIS. None of those are real.

FAQ preview

• How long does a green card take? Immediate relatives of U.S. citizens: 12–24 months. Siblings: 15+ years. Employment EB-2/EB-3 for India: 5–15+ years. Read the green card guide.
• Can I work on a student visa? F-1 students can work on-campus up to 20 hours/week and apply for CPT (during studies) or OPT (after graduation). Read the F-1 guide.
• What is the H-1B cap? 65,000 per year plus 20,000 for U.S. master's degree holders, allocated by lottery when oversubscribed. Read the H-1B guide.
• How do I get a visa through my job? The employer sponsors you. Read our sponsorship guide.
• What is the citizenship test like? 100 civics questions (you are asked up to 10, must answer 6 correctly), plus reading, writing, and speaking English. Read the citizenship test guide.

Your next step

Open the pre-screener on this hub that matches your situation, answer the questions honestly, and read the related guide for context. If your case is straightforward, you may be able to file yourself using USCIS.gov's official instructions. If anything in your history is unusual—prior denials, criminal record, status gaps, complex family situations—consult a licensed immigration attorney before filing anything. Immigration is the one area of personal finance where one wrong form can change the rest of your life. Treat it accordingly.

Reminder: Nothing on this page is legal advice. Always consult a licensed immigration attorney for your specific situation.