Moving to United States

The largest immigrant population on earth, reached through the narrowest set of doors.

The United States hosts more foreign-born residents than any other country, and it admits them through a system that rewards two things above all others: an employer willing to sponsor, or a close relative who is already a citizen or permanent resident. There is no points test, no general skilled-migration route, and no visa a qualified stranger can simply apply for on merit.

Everything divides into two families. Non-immigrant visas are temporary and tied to a purpose — work for a named employer, study at a named school, a specific treaty relationship. Immigrant visas lead to permanent residence, the green card, and are subject to annual numerical limits and per-country caps. Understanding which family a category belongs to explains most of what otherwise looks arbitrary.

Two structural facts shape outcomes more than anything an applicant does. The main professional work visa, the H-1B, is capped and allocated by lottery, so a strong candidate with a real job offer can simply lose. And the per-country caps on employment-based green cards have produced backlogs measured in decades for nationals of India and, to a lesser degree, China. US immigration policy also changes substantially between administrations, so fees, processing practice, and enforcement priorities described anywhere should be checked against the official pages before relying on them.

Why people move to United States

• The labour market is deep and pays more, in most professional fields, than anywhere else in the world.
• A green card carries almost every right of citizenship apart from voting and certain federal jobs.
• Naturalisation is commonly available after around five years of permanent residence, or roughly three when married to a citizen.
• The United States tolerates dual nationality in practice, so most people keep their original citizenship.
• Universities are numerous and well funded, and the student route carries substantial post-study work rights.
• Birth in the United States confers citizenship, which matters to families settling long term.

What to know before you commit

• There is no general route for a skilled person without an employer sponsor, a family tie, or exceptional achievement.
• The H-1B is a lottery: registration commonly exceeds the annual cap several times over, so selection is largely chance.
• Per-country caps mean Indian and Chinese nationals in some employment categories face waits measured in decades.
• Almost every temporary work visa ties status to one employer, so redundancy can end lawful stay within a short grace period.
• There is no universal healthcare; cover is usually bought through an employer or the marketplace, and gaps are expensive.
• Rules, fees, and processing practice shift markedly between administrations, so plans made years ahead carry real policy risk.

The eight guides

Official sources

• US Citizenship and Immigration Services
• US Department of State — Visas
• Visa Bulletin

Checked against these pages in September 2026. Fees and processing times change without notice — confirm before you act.