USA

概览

The United States has multiple parallel immigration paths: short visits, student status, temporary work, and permanent residency. A Visa Waiver Program traveler may stay up to 90 days with ESTA, while F-1 students must enroll at an SEVP-certified school and maintain status throughout their studies.

• Common nonimmigrant visa fees: B and F/M/J visas are $185, petition-based work visas are $205, and ESTA is $21.
• Student-specific upfront costs include the I-901 SEVIS fee of $350 for F-1/M-1 and $220 for most J-1 programs.
• F-1 students may work up to 20 hours per week on campus and can qualify for 12 months of OPT plus a 24-month STEM OPT extension.
• Typical visa interview and processing steps can take several weeks to several months, so timing matters before travel or enrollment.
• Overstaying an I-94 or failing to maintain status can trigger long-term immigration consequences, including multi-year re-entry bars.

• Housing and utilities: rent is usually the largest monthly expense, and utility responsibility should be confirmed before signing a lease.
• Transportation: major cities may have strong transit, but many suburbs and rural areas are effectively car-dependent.
• Healthcare: insurance is essential because even a routine emergency room visit can be expensive without coverage.
• Safety: save 911, 988, poison help, and FEMA disaster assistance numbers before arrival.
• Daily setup: open a bank account, secure a phone plan, and track tax and registration obligations early.

For language learners, US study and daily life create strong immersion opportunities. Free resources like USA Learns, VOA Learning English, and public library ESL programs can supplement formal classes, while universities often provide advising, tutoring, counseling, and career support.