United States Entry Requirements
Visa, immigration, and customs information
Visa Requirements
Entry permissions vary by nationality. Find your category below.
Three doors. That's it. The United States funnels every visitor through the Visa Waiver Program—ESTA pre-authorization required—standard nonimmigrant visas, or special visa categories for narrow purposes. Your nationality decides which door opens. No exceptions.
42 countries. That's all you need to hold a passport from to skip the U.S. visa line entirely. Citizens of these nations can land for tourism, business, or transit—no embassy visit, no paperwork mountain. One catch: you must secure an approved Electronic System for Travel Authorization (ESTA) before boarding. Not optional. Airlines won't even scan your boarding pass without it. Once granted, the ESTA runs for two years—unless your passport expires sooner. Whichever hits first. During that window, you can come and go as often as you like. Multiple entries, zero extra forms.
Cost: USD $21 per application (includes a $4 processing fee and a $17 travel promotion fee). The fee is non-refundable—no matter the outcome.
CBP officers—not your ESTA approval—decide if you get in. That is the reality at the port of entry. VWP travelers can't extend. Can't adjust to most other visa categories. Can't work in the U.S. The rules are tight. Visited Cuba, Iran, Iraq, Libya, North Korea, Somalia, Sudan, Syria, or Yemen on or after March 1, 2011? You're generally ineligible for VWP. Apply for a visa instead. Dual nationals of those countries face the same restriction.
If you carry a passport from India, Nigeria, Colombia, or most of Africa, Asia, or the Middle East, you can't board a U.S.-bound plane without a visa. You'll need a nonimmigrant visa from any U.S. embassy or consulate before you travel. Ask for the B-2 Tourist Visa—still the go-to stamp for sightseeing and quick family trips. Consuls usually bundle it with the B-1 Business Visitor Visa, handing you one combo B-1/B-2 sticker.
Your U.S. visa is just a ticket to the door—not the key. The CBP officer at the port of entry holds that key, and they can still turn you away. Bring proof of why you're coming, how you'll pay, and what anchors you back home—job letter, house deed, family photos. Overstay even once and you'll earn a multi-year re-entry bar. No appeals.
Canadian citizens? They walk straight in. No visa, no ESTA—just a valid Canadian passport at the port of entry. Tourism, business—doesn't matter.
Cost: No fee
Canadian permanent residents (non-citizens) aren't covered by this exemption—they'll follow standard visa or VWP rules based on their nationality. Canadian citizens entering by land or sea may use an enhanced driver's license or NEXUS card instead of a passport at certain entry points.
Bermuda citizens walk in—no visa needed. Mexico's travelers can't use VWP; they need a B-1/B-2 visa. Laser Visa holders slip into the border zone.
Cost: Standard B-1/B-2 MRV fee of USD $185 for Mexican nationals
Mexican citizens—those holding a valid B-1/B-2 visa—may travel throughout the United States for the duration authorized on their I-94.
Arrival Process
Every single international traveler—no exceptions—must clear U.S. Customs and Border Protection (CBP) at the first U.S. port of entry. Even if you're connecting straight to a domestic flight. Full immigration and customs clearance happens before you move on. At busy hubs, plan for 1–3 hours or more.
Documents to Have Ready
Tips for Smooth Entry
Customs & Duty-Free
U.S. Customs and Border Protection enforces federal customs laws at all ports of entry. All international travelers must complete a CBP Declaration Form and pass through customs inspection. Penalties for failing to declare items or making false statements are severe and can include fines, seizure of goods, and future entry refusals.
Prohibited Items
- Most fresh fruits and vegetables — risk of introducing agricultural pests or disease
- Unprocessed meats and certain meat products from many countries—disease risk (e.g., African swine fever, foot-and-mouth disease)
- Live plants with soil — risk of soil-borne pathogens and invasive species
- Endangered species products — items made from CITES-listed species (ivory, certain leathers, shells, feathers)
- Cuban cigars and alcohol bought in Cuba for commercial or resale use face full embargo restrictions when the quantities are commercial.
- Counterfeit goods—trademark-infringing products of any kind—get seized. Penalties follow. Simple.
- Narcotics and controlled substances — recreational drugs — remain strictly prohibited. Federal law imposes severe criminal penalties.
- Certain firearms and ammunition without prior authorization from ATF and CBP
- Obscene materials, child exploitation material — federal criminal offense
- Soil (dirt) — risk of plant pathogens and agricultural pests
Restricted Items
- Bring guns into the U.S.? You can—if you've got the paperwork. Firearms and ammunition are legal to import with a proper ATF Form 6 import permit. Carry sport shooters may use Form 6NIA instead. You'll declare everything on a CBP form. Just remember: state laws vary significantly. Some welcome you. Others won't.
- Prescription meds with controlled substances—valid prescription only. DEA Schedule I drugs? Banned. Doesn't matter where your prescription came from.
- Some canned meats, cheeses, and dried fruits from specific countries won't clear customs without USDA permits and APHIS clearance.
- Plants and seeds — many won't clear customs without a USDA/APHIS phytosanitary certificate plus an import permit.
- Birds and bird products from bird flu-affected regions — they're flat-out banned.
- Booze over your duty-free limit? You'll pay federal excise tax plus whatever your state decides—some states ban bringing it in at all.
- You can bring back USD $800 of Cuban cigars, rum, and coffee—no paperwork, no hassle. Personal use only; try to sell them and customs will seize the lot.
- Cultural artifacts and pre-Columbian objects — you'll need paperwork proving legal export from the country of origin.
Health Requirements
No shots, no problem—yet. The United States still demands zero mandatory vaccines for most visitors. CBP officers at every port can still screen you. Look sick? They’ll turn you away.
Required Vaccinations
- COVID-19 vaccination: On May 11, 2023, the U.S. government dropped the COVID-19 vaccine rule for international air travelers. No COVID-19 vaccination is currently required for entry by any traveler.
- You’ll need every shot on the ACIP list—mumps, measles, rubella, tetanus, diphtheria, pertussis, polio, influenza (seasonal), hepatitis A and B, meningococcal disease, varicella, pneumococcal disease—if you’re an immigrant or certain nonimmigrant visa applicant adjusting status. No exemptions. The mandate hits during the immigration medical exam, not at the tourist window.
- No routine shots needed. Tourists can walk straight into the United States—no vaccination paperwork, no queue at a clinic counter.
Recommended Vaccinations
- COVID-19 (up-to-date vaccination including current boosters) — strongly recommended by CDC for all travelers
- You’ll need the basics: MMR (measles-mumps-rubella), Tdap (tetanus, diphtheria, pertussis), varicella, flu vaccine.
- Hepatitis A and B — recommended for most international travelers
- Measles is back in the U.S.—check your shots before you fly anywhere with active outbreaks.
Health Insurance
No safety net. The United States has no universal or publicly funded healthcare system for visitors—none. Medical treatment costs are among the highest in the world, period. A routine emergency room visit can cost USD $1,500–$3,000. Hospitalization quickly reaches USD $10,000–$50,000 or more per day. Buy complete united states travel insurance with at minimum USD $100,000 in medical coverage and emergency medical evacuation. Many travel health professionals suggest USD $500,000 in evacuation coverage given the geography. Ensure your policy covers pre-existing conditions, adventure activities if applicable, and trip cancellation. The U.S. does not require proof of health insurance for entry. The financial consequences of arriving uninsured can be catastrophic—bankruptcy-level catastrophic.
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Special Situations
Additional requirements for specific circumstances.
Children under 14 don't get fingerprinted. That's the easy part. Everyone else needs the full paperwork. Children traveling with both parents require only standard travel documents—passport, visa or ESTA. A child traveling with only one parent, with grandparents, or with another adult should carry a notarized letter of consent from the absent parent(s) authorizing the travel, including dates, destination, and the accompanying adult's contact information. This isn't a U.S. federal legal requirement. CBP officers or airlines may request it anyway. Strongly recommended. All children, including infants and newborns, require their own passport and, if applicable, their own visa or ESTA. There is no age-based exemption.
Dogs entering the U.S. must be healthy upon arrival. Since August 1, 2024, dogs that have been in a high-risk country for dog rabies within the past 6 months are subject to strict CDC requirements and must be accompanied by documentation that they were vaccinated against rabies in the U.S., microchipped, and issued a CDC Dog Import Permit. Dogs not in high-risk countries must appear healthy on arrival. Cats generally face no vaccination requirements but must appear healthy. The USDA Animal and Plant Health Inspection Service (APHIS) regulates the importation of other animals, birds, and livestock — check aphis.usda.gov for species-specific requirements. All pets should have a health certificate issued by a licensed veterinarian within 10 days of travel. Airline and carrier-specific policies on pet transport apply in addition to federal requirements.
Overstay by one day and you're banned for life—no more Visa Waiver Program, ever. VWP travelers get 90 days, period. You can't extend, can't switch to most visa categories inside the U.S. Want longer? Fly out, walk into a U.S. embassy or consulate, and apply fresh for a B-2. One single day past 90, and you'll need a visa for every future U.S. visit—permanently.
File Form I-539 before your I-94 expires. That's the only way B-2 visa holders can extend their stay—no exceptions. USCIS won't guarantee approval, and processing drags on for several months. Stay in valid status while you wait. Overstay without a timely filing and you'll face real consequences: 180+ days of unlawful presence means a 3-year entry bar. One year or more? A 10-year bar. Total chaos. Worth avoiding.
One old DUI can lock you out of the United States for life. Drug offenses, crimes involving moral turpitude, and multiple convictions adding up to 5+ years slam the door permanently on a visa or VWP entry. Got any criminal record? Stop and examine the visa requirements before you book. You'll likely need a waiver of inadmissibility—Form I-192 for VWP travelers, or handled during the visa interview process. Always answer truthfully on ESTA applications and in CBP interviews. Lie once and misrepresentation becomes a separate ground for permanent inadmissibility.
Don't even try the VWP. Don't flash a B-1/B-2. If you're a reporter, photographer, cameraman—or any media professional—heading to the U.S. on assignment, you need the I visa. Period. Freelancers and bloggers traveling for personal reasons can slip through on tourist provisions. Professionals on assignment cannot. Get the wrong stamp and you'll be explaining yourself to a stone-faced officer at the border.
Pack twice what you think you'll need. Visitors dependent on prescription medications must carry a sufficient supply for their entire stay plus additional in case of travel delays. Bring original pharmacy-labeled containers, a copy of the prescription, and a physician's letter for controlled substances. The U.S. does not accept foreign prescriptions—you cannot easily refill medications while visiting. Controlled substances (even those legally prescribed abroad) that are classified as Schedule I in the U.S. (e.g., certain cannabis products) cannot be brought in regardless of origin-country legality.
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