Bringing more than $10,000 into the US is legal, but you have to report it. Federal law sets no cap on how much cash or monetary instruments you can carry across the border. What it requires is a declaration to U.S. Customs and Border Protection (CBP) on FinCEN Form 105. Skip that step, and you can lose every dollar, pay a matching civil fine, and face criminal charges on top.
The Reporting Rule and What Counts
Anyone who knowingly transports monetary instruments worth more than $10,000 into or out of the United States must file a report with CBP.1Office of the Law Revision Counsel. 31 US Code 5316 – Reports on Exporting and Importing Monetary Instruments The same rule catches you if more than $10,000 is mailed or shipped to you from abroad and no report has already been filed.
The threshold is aggregate, not per person. A couple each carrying $6,000 is carrying $12,000 together, and the group has to declare.2USAGov. How Much Money Can You Bring Into and Out of the US CBP officers are trained to identify people traveling together even when they approach the checkpoint separately.
“Monetary instruments” is broader than cash. It covers U.S. and foreign coins and currency, traveler’s checks, money orders and checks endorsed in bearer form or made out to a fictitious payee, signed instruments with a blank payee line, and bearer securities. A check payable to a specific named person with a restrictive endorsement does not count.3U.S. Customs and Border Protection. Definition of Negotiable Monetary Instruments for Currency Reporting
Two edge cases trip people up. Gold coins are treated as currency and count toward the $10,000 threshold; gold bullion is not a monetary instrument, though CBP still requires you to declare it at the checkpoint.4U.S. Customs and Border Protection. Regulations for Importing Bullion, Gold Coins, and Medals Into the United States Virtual currencies like Bitcoin, credit cards, and prepaid cards are not monetary instruments under these rules, so FinCEN Form 105 is not required for them regardless of value.3U.S. Customs and Border Protection. Definition of Negotiable Monetary Instruments for Currency Reporting Other tax reporting rules may still apply to digital assets.
How to Declare on FinCEN Form 105
The declaration form is FinCEN Form 105, the Report of International Transportation of Currency or Monetary Instruments.5U.S. Customs and Border Protection. Currency Reporting You have three ways to file it:
- File electronically through CBP’s FinCEN 105 portal before you travel.2USAGov. How Much Money Can You Bring Into and Out of the US
- Download and print the form, complete it at home, and hand it to a CBP officer at the port of entry or departure.
- Ask for a paper copy at the checkpoint and fill it out on the spot.
The form asks for your name, date of birth, permanent address, citizenship, and an identification number. U.S. citizens and residents must provide a Social Security number; non-citizens without an SSN give a passport or alien registration number.6Financial Crimes Enforcement Network. FinCEN Form 105 – Report of International Transportation of Currency or Monetary Instruments You also describe the amount and type of currency, where the funds came from, and where they are going.
There is no fee, tax, or duty for declaring. Filing the form does not mean the government takes a cut. It is a transparency measure, nothing more.
Penalties If You Don’t Report
Three separate consequences can hit you at once: a civil fine, criminal charges, and forfeiture of the money itself.
Civil Fine
The Treasury Department can impose a civil penalty of up to the total amount of the unreported monetary instruments.7Office of the Law Revision Counsel. 31 US Code 5321 – Civil Penalties Carry $25,000 undeclared and the fine can reach $25,000, on top of whatever else follows.
Criminal Charges
Willfully violating the reporting requirement is a federal crime. A basic failure to report is punishable by a fine of up to $250,000, up to five years in prison, or both. If the violation is tied to another crime or is part of a pattern of illegal activity involving more than $100,000 in a twelve-month period, the maximum rises to a $500,000 fine and ten years in prison.8Office of the Law Revision Counsel. 31 US Code 5322 – Criminal Penalties
Forfeiture
CBP can seize the entire sum, not just the portion above $10,000. Someone caught with $50,000 undeclared risks losing all $50,000. The statute authorizes forfeiture of “all property, real or personal, involved in the offense and any property traceable thereto.”9Office of the Law Revision Counsel. 31 US Code 5317 – Search and Forfeiture of Monetary Instruments The government can pursue forfeiture civilly or criminally, and a criminal conviction is not required for civil forfeiture.
Not knowing about the requirement is not a defense. Courts have consistently held that the rule is publicized enough that travelers are on notice.
Splitting Cash Is Its Own Crime
Trying to duck the threshold by breaking cash into smaller amounts is a separate federal offense called structuring. Under 31 U.S.C. § 5324, no one may structure or help structure the movement of monetary instruments across the border for the purpose of evading the reporting requirement.10Office of the Law Revision Counsel. 31 US Code 5324 – Structuring Transactions to Evade Reporting Requirement Prohibited Splitting $20,000 between two trips a week apart, asking friends to each carry a portion, or mailing amounts in separate packages to stay under $10,000 all qualify. Structuring is a crime even if the money itself is entirely legitimate. The penalty is up to five years in prison, or up to ten years if the structuring is tied to other illegal activity.
Physically hiding cash is punished more harshly still. Bulk cash smuggling under 31 U.S.C. § 5332 covers anyone who conceals more than $10,000 on their body, in luggage, or inside merchandise with the intent to evade the reporting requirement. False compartments, bills taped inside clothing, currency buried in a shipment of goods, all fall within the statute.11Office of the Law Revision Counsel. 31 US Code 5332 – Bulk Cash Smuggling Into or Out of the United States A conviction carries up to five years in prison, and the concealed funds are subject to forfeiture.
Getting Seized Money Back
If CBP seizes your money, the government must send you a written notice of seizure. From the date that notice is mailed, you have 30 days to file a petition for remission or mitigation.12eCFR. 19 CFR 171.2 – Filing a Petition Miss that window and you effectively give up your administrative remedy.
The petition is filed on CBP Form 4609, or by letter containing the same information.13U.S. Customs and Border Protection. CBP Form 4609 – Petition for Remission or Mitigation of Forfeitures and Penalties It needs to include:
- The seizure case number and the date, time, and location of seizure
- A description of the seized property
- The facts and circumstances you believe justify returning the money or reducing the penalty
- Proof of your interest in the funds, such as bank records, receipts, or contracts
CBP decides these petitions administratively and has wide discretion. In a first-time, good-faith violation involving clearly legitimate money, travelers sometimes get part of the funds back, though CBP typically keeps a penalty amount. There is no guarantee of a favorable result, and larger or more complicated cases usually call for an attorney who handles customs forfeitures.
Lasting Effects on Future Travel
A currency violation follows you past the checkpoint. CBP keeps records of enforcement actions, and a seizure on file can mean heightened scrutiny every time you cross the border, including more frequent secondary inspections and pointed questions about your finances.
Trusted Traveler Program memberships, including Global Entry, NEXUS, SENTRI, and the TSA PreCheck benefit obtained through Global Entry, may be revoked after a currency seizure. Reapplying is possible but not guaranteed; CBP has broad discretion to deny.
A criminal conviction for a reporting violation, structuring, or bulk cash smuggling creates a permanent federal record that can affect visa applications, professional licensing, and employment background checks for years.