Carrying more than $10,000 in cash or monetary instruments (traveler's checks, money orders) is legal, but you must report it to Customs and Border Protection (CBP) when entering or leaving the U.S. using Form FinCEN 105. Failure to report, or "structuring" transactions to avoid reporting, can lead to seizure of the money, heavy fines, and potential criminal charges.
Understanding U.S. Customs Regulations on Carrying Cash
By law, travelers must declare cash or monetary instruments totaling more than $10,000 when entering or leaving the United States. This requirement is part of U.S. efforts to combat money laundering, terrorism financing, and other illicit activities.
If you are traveling with an excess of $10,000, you must report it to a Customs and Border Protection (CBP) officer when you enter or exit the U.S. But there is no limit to the amount of money you can travel with.
There are no state or federal laws that make simply possessing cash illegal. However, carrying large amounts of cash can raise red flags with law enforcement, leading to seizures, detentions, and sometimes civil forfeiture proceedings—even when no criminal charges are filed.
Yes, you can fly with $25,000 cash, but for international travel (into/out of the U.S.), you must declare it to Customs and Border Protection (CBP) by filling out a FinCEN Form 105, as it's over the $10,000 reporting threshold, while domestic flights have no limit but can raise red flags. Failing to declare international amounts can lead to seizure and penalties, even if the money is legitimate.
If you're travelling as a family or group with €10,000 or more in total (even if individuals are carrying less than that) you still need to make a declaration. Customs authorities may ask you to fill in a cash disclosure form if you send cash by freight, post or parcel between Northern Ireland and any non-EU country.
The police seize assets – without compensating the owner – when they suspect that the money or property was used in a crime or was acquired as a result of criminal activity. California allows the police and prosecutors to seize not only money but also boats, cars, and even real estate.
There are no TSA limits on the amount of cash you can carry on domestic flights in the U.S. For international travel, you must declare totals over $10,000 to Customs and Border Protection.
Generally, if you're in a trade or business and receive more than $10,000 in cash in a single transaction or in related transactions, you must file Form 8300.
There's no limit on how much cash you can bring. But if you're carrying over $10,000, you must declare it to US Customs using Form 6059B and FinCEN Form 105. This applies to group totals too, not just individuals. If you skip the forms, you risk losing the money and facing serious penalties.
That said, cash withdrawals are subject to the same reporting limits as all transactions. If you withdraw $10,000 or more, your bank must report it to the IRS by law. This helps prevent money laundering and tax evasion. Still, few banks set withdrawal limits on a savings account.
On a medium-sized budget, travellers can expect to spend around £6,000 to £10,000 to travel the world for half a year.
Although no rules limit the amount of money you can bring on a flight, there are rules about disclosing currency on an international flight. If you are traveling on an international flight and have $10,000 or more in your possession, you must disclose the amount of U.S. Currency in your possession on a FinCEN 105 form.
Members individually carrying over $10,000 are then required to file a FinCEN Form 105.
Under the California Control of Profits of Organized Crime Act, police are allowed to seize your money as evidence if it is suspected to be linked to certain crimes.
Potential penalties to look out for
Not reporting cash or cash equivalents over the amount of $10,000 can come with serious consequences. U.S. Customs and Border Protection notes that consequences can include: Forfeiture of the money you're carrying—meaning they take the money at customs and you don't get it back.
Yes, you can fly with $20,000 cash, but for international travel, you must declare it to U.S. Customs and Border Protection (CBP) by filing a FinCEN Form 105, as any amount over $10,000 needs reporting; for domestic flights, there's no limit, but large sums can trigger extra screening, so keep it in your carry-on and be prepared to explain its legitimate source to avoid seizure, advises USA.gov, DHS.gov, CBP.gov, and Remitly, Alternative Airlines.
In summary, while airport scanners are not explicitly designed to detect cash, their capabilities often allow them to do so.
Police ask trick questions like "Do you know why I stopped you?" or "Can I search your car?" to get you to admit guilt or consent to searches, often using leading questions or seeming friendly to build rapport and gather evidence. Key tactics involve questioning your awareness of violations (speed, drinking) to get an admission and using double negatives ("Don't mind if I look, do you?") to confuse consent. The best approach is often to stay calm, politely decline to answer beyond basic identification, and clearly state you don't consent to searches.
You can enter Switzerland with as much cash (in the form of cash, foreign currencies, shares, bonds, cheques) as you like. However, customs officials may ask you questions if you're carrying CHF 10,000 or more. They will make a note in the computer system of the Federal Office for Customs and Border Security.
Under 12 CFR 21.11, national banks are required to report known or suspected criminal offenses, at specified thresholds, or transactions over $5,000 that they suspect involve money laundering or violate the Bank Secrecy Act.