What Is Cash Structuring? Definition and Penalties

Cash structuring is the practice of deliberately splitting up cash transactions to keep each one under the $10,000 federal reporting threshold, and it’s a federal felony punishable by up to five years in prison even when the money itself is completely legal. Banks are required to report cash transactions above $10,000 to the government, and anyone who arranges deposits, withdrawals, or purchases to prevent that report from being filed can face criminal prosecution, heavy fines, and seizure of the funds involved.

What Counts as Structuring

Structuring, sometimes called “smurfing,” happens when someone takes a larger amount of cash and breaks it into smaller transactions sized to stay under the bank’s reporting obligation. Instead of depositing $15,000 at once, a person might make four deposits of $3,750 spread across several days. The point is to move the full amount without any single transaction crossing the $10,000 line that would generate a report to the government.

The law covers a wide range of tactics. Splitting deposits across multiple branches of the same bank, spreading them across different banks, or spacing them out over days can all qualify as structuring if the purpose is to avoid a report.¹ The federal statute defines it broadly: a person structures a transaction by conducting one or more currency transactions, at one or more financial institutions, on one or more days, in any manner designed to evade the reporting requirement.²

It isn’t limited to deposits and withdrawals. Financial institutions must also keep records when someone buys monetary instruments with cash, such as money orders, cashier’s checks, or traveler’s checks, in amounts between $3,000 and $10,000. Buying several money orders just under $3,000 each to stay below that recordkeeping threshold is a red flag for regulators and can support a structuring investigation.³

The Reporting Threshold Behind the Rule

The reporting framework structuring laws protect comes from the Bank Secrecy Act. Its central tool is the Currency Transaction Report (CTR). Under federal regulation, a bank must file a CTR for any cash transaction — deposit, withdrawal, exchange, or transfer — involving more than $10,000.⁴

Banks aggregate cash transactions across a single business day. Deposit $6,000 at one branch in the morning and $5,000 at another that afternoon, and the bank treats those as a combined $11,000 transaction and files a CTR.⁵ Banks may also file a Suspicious Activity Report (SAR) when a pattern looks like structuring, and structuring is one of the most commonly reported suspected crimes on SARs.¹ Both reports go to the Financial Crimes Enforcement Network (FinCEN), which analyzes them for patterns of potential criminal activity.

Intent Is Required

Structuring is not a strict-liability crime. The government must prove you acted “for the purpose of evading” a reporting requirement to get a conviction.² That means prosecutors have to show you knew banks are required to report cash transactions above $10,000 and that you deliberately shaped your transactions to prevent that report. A retail shop owner depositing daily cash receipts in irregular amounts isn’t structuring, even if those deposits happen to be under $10,000, if there was never any purpose to dodge a CTR.

Prosecutors typically prove intent through circumstantial evidence: the timing, frequency, and amounts of deposits. Fifteen deposits over five months that all land between $9,000 and $9,900 look very different from irregular deposits of varying sizes. Statements to a teller, such as asking how much can be deposited without paperwork, pulling cash back after learning a report was being prepared, and the use of multiple accounts or banks all strengthen the government’s case.

One case makes the pattern concrete. A limousine service owner deposited roughly $140,000 in cash over five months, with nearly all of his 15 deposits falling between $9,000 and $9,900. On one visit he handed a teller two stacks of $10,000, and after the teller started preparing a CTR he pulled $100 from each stack and deposited only $9,900 into each account. He was convicted of structuring in 2009 even though prosecutors never alleged the money came from any illegal source.⁶

The government does not need to prove the money came from an illegal source. Structuring legally earned income is still a felony if the purpose was to evade a report. The offense is about dodging the report, not about where the money came from.

Criminal Penalties

A standard structuring conviction under 31 U.S.C. § 5324(d) carries up to five years in federal prison, a fine of up to $250,000, or both.⁷⁸

Enhanced penalties apply in aggravated cases. If structuring is committed while violating another federal law, or as part of a pattern of illegal activity involving more than $100,000 in any 12-month period, the maximum prison sentence doubles to ten years and the maximum fine doubles to $500,000 for individuals and $1,000,000 for organizations.⁷

The federal statute of limitations for structuring is five years from the date of the offense, the same deadline that applies to most non-capital federal crimes.⁹ Because structuring typically involves a series of transactions, the clock may start from the last transaction in the pattern rather than the first.

Civil Forfeiture of the Cash

Prosecution isn’t the only exposure. The government can also pursue civil forfeiture to seize the cash itself. In a civil forfeiture action, the government has to prove by a preponderance of the evidence, meaning more likely than not, that the property is connected to structuring or another offense. That’s a lower standard than the “beyond a reasonable doubt” test used in criminal cases.¹⁰

If your money is seized, you can contest the forfeiture by filing a claim identifying the property and your interest in it. The case then moves to federal court, where you can raise an “innocent owner” defense, but the burden of proving it is on you. The process can be lengthy and expensive, with no guarantee of recovering the funds even if you’re never charged with a crime.¹⁰

Public criticism of aggressive forfeiture, particularly cases involving small business owners whose legally earned cash was seized based on deposit patterns alone, led to policy changes. In 2015, the Attorney General restricted the use of civil and criminal forfeiture in structuring cases, generally requiring that a defendant be criminally charged or found to have engaged in additional criminal activity before seized funds could be kept. The policy also imposed a 150-day deadline to file an indictment or civil complaint, after which the full seized amount must be returned.¹¹ The IRS adopted a parallel policy limiting seizures of legally sourced funds to exceptional circumstances approved by senior officials. These reforms reduced, but did not eliminate, the government’s ability to seize money based on deposit patterns.

Beyond Bank Deposits

Structuring isn’t only about bank accounts. Any trade or business that receives more than $10,000 in cash, whether in a single payment or in two or more related payments, must file IRS Form 8300.¹² Car dealerships, jewelry stores, real estate agents, and attorneys all fall under this rule. Any payments between the same buyer and seller within 24 hours are automatically treated as related, and payments spread over a longer period count if the business knows or has reason to know they’re part of a connected series. Once total cash from a buyer exceeds $10,000 within any 12-month period, the business must file Form 8300 within 15 days.¹³ Splitting a payment to make reporting appear unnecessary is treated the same as structuring a bank deposit, and willful failure to file is itself a felony carrying up to five years in prison.¹⁴

A separate rule applies at the border. Anyone transporting more than $10,000 in currency or monetary instruments into or out of the United States must file a report with U.S. Customs and Border Protection, and for families or groups traveling together the threshold applies to their combined total, not to each person individually.¹⁵¹⁶ Structuring the import or export of monetary instruments to evade that report is prohibited under 31 U.S.C. § 5324(c). A more serious charge, bulk cash smuggling, applies when someone knowingly conceals more than $10,000 on their person, in luggage, or in any container while crossing the border to avoid reporting. A bulk cash smuggling conviction carries up to five years in prison, and the court must order forfeiture of the smuggled funds and any property connected to the offense.¹⁷

1
FFIEC BSA/AML Manual. Appendix G – Structuring
2
Office of the Law Revision Counsel. 31 USC 5324 – Structuring Transactions to Evade Reporting Requirement Prohibited
3
FDIC. Bank Secrecy Act, Anti-Money Laundering, and Office of Foreign Assets Control
4
eCFR. 31 CFR 1010.311 – Filing Obligations for Reports of Transactions in Currency
5
FinCEN. The Bank Secrecy Act
6
FinCEN. Judge Rules Defendant Guilty of Structuring
7
Office of the Law Revision Counsel. 31 USC 5324 – Structuring Transactions to Evade Reporting Requirement Prohibited
8
Office of the Law Revision Counsel. 18 USC 3571 – Sentence of Fine
9
Office of the Law Revision Counsel. 18 USC 3282 – Offenses Not Capital
10
Internal Revenue Service. 9.7.2 Civil Seizure and Forfeiture
11
United States Department of Justice. Attorney General Restricts Use of Asset Forfeiture in Structuring Offenses
12
Internal Revenue Service. About Form 8300, Report of Cash Payments Over $10,000 Received in a Trade or Business
13
Internal Revenue Service. Instructions for Form 8300
14
Internal Revenue Service. IRS Form 8300 Reference Guide
15
Office of the Law Revision Counsel. 31 USC 5316 – Reports on Exporting and Importing Monetary Instruments
16
U.S. Customs and Border Protection. Money and Other Monetary Instruments
17
Office of the Law Revision Counsel. 31 USC 5332 – Bulk Cash Smuggling Into or Out of the United States