Here’s a simple map of today’s main legal pathways to status in the U.S., with the key caps or limits where they exist.

Big picture

The immigration system is built around a worldwide annual limit of about 675,000 permanent immigrant visas, split mainly between family and employment, plus separate programs for refugees, the diversity lottery, and humanitarian and temporary visas. Some core routes (like immediate relatives of U.S. citizens and certain humanitarian protections) are uncapped, while others have strict annual numerical ceilings and per‑country limits.[1][2][3][4][5]

Family-based immigration

Permanent residence (green cards) through family falls into two broad groups.

• Immediate relatives of U.S. citizens:
  • Who: Spouses, unmarried children under 21, and parents of U.S. citizens age 21+.[6][1]
  • Cap: No annual numerical cap; visas are always “immediately available” in law, though processing delays still occur.[1][6]
• Family preference categories:
  • Who: Adult children and siblings of U.S. citizens, and certain relatives of lawful permanent residents (LPRs).[7][1]
  • Cap: Subject to annual worldwide caps and per‑country limits within the overall family‑based side of the 675,000 ceiling; this is why long backlogs exist for many countries.[2][1]

Example: A U.S. citizen’s spouse has no quota wait, but a U.S. citizen’s sibling from Mexico or the Philippines can wait many years because of the preference caps and per‑country ceilings.[2][1]

Employment-based permanent immigration

Employment-based green cards are numerically limited and divided into preference categories.

• Overall employment‑based cap:
  • About 140,000 immigrant visas per year, including principal workers plus their spouses and minor children.[2]
• Preference groups (EB‑1 through EB‑5):
  • EB‑1: Priority workers (extraordinary ability, outstanding professors/researchers, certain executives).[2]
  • EB‑2: Advanced degree professionals or those with exceptional ability.[2]
  • EB‑3: Skilled workers, professionals, some other workers; EB‑3 and its “other workers” subgroup (EW) together cannot exceed a share (28.6% for EB‑3; up to 10,000 of that for EW) of the employment‑based cap.[8]
  • EB‑4: Certain “special immigrants” (religious workers, some juveniles, etc.).[2]
  • EB‑5: Immigrant investors creating jobs.[2]
• Per‑country cap:
  • No single country can use more than about 7% of the worldwide employment‑ and family‑based immigrant visas (about 47,250), which contributes to long waits for high‑demand countries.[2]

Refugees and asylees

• Refugee admissions (outside the U.S.):
  • Each year, the president sets a ceiling by consultation with Congress.[3][4]
  • For fiscal year 2026, the current administration set the cap at 7,500, a historic low, down from 125,000 in the previous cycle.[4][3]
• Asylum (inside or at the border):
  • No statutory numerical cap on asylum grants, but access is heavily shaped by policy, eligibility rules, and case backlogs.[3][4]

People granted refugee or asylum status can later apply for permanent residence under separate rules; there is not a separate fixed annual “green card” cap just for asylees/refugees in the same way family/employment have.[3][2]