US, Canadian, EU, and most UK citizens need a valid passport and a completed FMM tourist card to enter Mexico at Cancun — no visa required for stays under 180 days. Your passport must be valid at the time of entry. Customs allows standard personal items plus limited duty-free goods. Keep your FMM stub for departure.
Mexico keeps entry requirements simple for most leisure travelers, and Cancun is one of the easiest international gateways in North America. Citizens of the US, Canada, the EU, the UK, and dozens of other countries don't need a visa for tourist stays up to 180 days — just a valid passport and a tourist card. The tourist card, called the FMM, is issued on the plane or at the airport and is free for most visitors. Customs is light-touch, with a random red/green light inspection system. The paperwork is straightforward, but a few small details — passport validity, traveling with minors, duty allowances — can trip you up. Here's what to know before you board.
Passport Validity
Mexico requires a valid passport for entry by all foreign visitors. Unlike many countries, Mexico doesn't enforce a strict six-month validity rule — your passport just needs to be valid for the duration of your stay. That said, airlines sometimes apply their own six-month rule at check-in, so it's safest to travel with at least six months of validity remaining regardless. Permanent residents of the US or Canada who aren't citizens should carry their green card or PR card in addition to their passport from their country of citizenship. Children need their own passports — they can't travel on a parent's. Make a photocopy or photo of your passport's data page and store it separately from the original, and email yourself a copy. This speeds up replacement if the original is lost or stolen.
Tourist Card (FMM)
The Formato Migratorio Múltiple, or FMM, is Mexico's tourist card. For most air-arriving visitors from the US, Canada, the EU, and the UK, the FMM is free and issued automatically — either handed out on the plane or printed at an airport kiosk before immigration. You'll fill in your name, passport number, nationality, and hotel address, and the immigration officer will stamp and return the bottom portion. Keep that stub. You'll need to surrender it on departure, and losing it means a small fine and extra paperwork at the airport. Many airlines now transmit FMM data electronically, in which case you may not receive a physical card at all — but you'll still get a stamp in your passport. The FMM grants up to 180 days of stay as a tourist, with the exact number left to the officer's discretion.
Visa Requirements
Citizens of the US, Canada, the EU, the UK, Australia, New Zealand, Japan, and most Latin American countries don't need a visa for tourist stays up to 180 days. The full list of visa-exempt countries is on Mexico's foreign ministry website, and travelers from countries not on it — including some in Asia, Africa, and the Middle East — must obtain a Mexican visitor visa in advance from a consulate. If you hold a valid US, Canadian, UK, Schengen, or Japan visa, or are a permanent resident of those countries, you can enter Mexico visa-free for tourism regardless of your passport. Business travel, study, and work require different permits applied for in advance. When in doubt, check with your nearest Mexican consulate before booking.
Customs Allowances
Mexico's customs rules for arriving air travelers are straightforward. You can bring in personal items for your trip, plus duty-free allowances of three liters of alcohol (if you're 18 or older), 10 packs of cigarettes, and a reasonable amount of perfume and electronics for personal use. Cash or negotiable instruments over $10,000 USD (or equivalent) must be declared on arrival — failure to do so carries serious penalties. Prohibited items include most fresh food, plants, animal products, and firearms. Prescription medication for personal use is allowed in original containers with a copy of the prescription. After baggage claim, you'll press a button on a customs light: green means walk through, red means a quick bag inspection. The inspection is usually polite and brief. Declare anything questionable — penalties for undeclared items are stiff.
Traveling with Minors
Mexico has specific rules for children traveling with only one parent or with neither parent. If a minor (under 18) is traveling with only one parent, the absent parent should provide a notarized letter of consent authorizing the trip, including contact information and travel dates. Children traveling alone or with non-parents need similar authorization. Mexican authorities don't always check, but airlines often do at check-in, and being without the right paperwork can mean a denied boarding. The letter should ideally be in Spanish or accompanied by a Spanish translation, though English versions are usually accepted at CUN. Children need their own passports — they cannot travel on a parent's passport. Custody documents, adoption papers, or death certificates should be carried if relevant. When in doubt, bring more documentation rather than less.
FAQ
Do US citizens need a visa for Cancun?
No. US citizens don't need a visa for tourist stays up to 180 days. You need a valid passport and a tourist card (FMM), which is issued free on the plane or at the airport. Permanent residents of the US who aren't citizens should also carry their green card.
How long does my passport need to be valid for Mexico?
Technically, just for the duration of your stay — Mexico doesn't enforce a six-month validity rule. However, airlines sometimes apply their own six-month rule at check-in, so it's safest to travel with at least six months of validity remaining to avoid any issues boarding your flight.
What is the FMM tourist card?
The FMM (Formato Migratorio Múltiple) is Mexico's tourist card, issued free to most air-arriving visitors from visa-exempt countries. You'll receive it on the plane or at the airport, fill in basic details, and get it stamped at immigration. Keep the stub — you'll surrender it on departure. Losing it means a small fine and extra paperwork.
How much cash can I bring into Mexico?
You can bring in any amount, but you must declare cash or negotiable instruments over $10,000 USD (or equivalent) on arrival. Failure to declare carries serious penalties, including seizure of the funds. Declare anything close to or over the threshold to be safe — there's no tax on declared amounts.
What can I bring through customs in Mexico?
Personal items for your trip, plus duty-free allowances of three liters of alcohol (for travelers 18+), 10 packs of cigarettes, and reasonable quantities of perfume and electronics for personal use. Fresh food, plants, animal products, and firearms are prohibited. Prescription medication is allowed in original containers with a prescription copy.
Do children need a letter to travel to Mexico with one parent?
Yes, ideally. Minors traveling with only one parent should have a notarized letter of consent from the absent parent, including contact information and travel dates. Children traveling alone or with non-parents need similar authorization. Mexican authorities don't always check, but airlines often do at check-in, and missing paperwork can mean denied boarding.
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