Structuring in money laundering is the federal crime of splitting cash transactions into smaller amounts to keep each one under $10,000 and avoid the report that banks must file above that line. It is prosecuted under 31 U.S.C. § 5324, carries up to five years in federal prison and a $250,000 fine for a basic violation, and can result in the seizure of the money itself. The source of the cash does not matter. Even completely legal money, structured to dodge the reporting requirement, is enough for a conviction.1Financial Crimes Enforcement Network. Judge Rules Defendant Guilty of Structuring; No Connection to Criminal Activity Alleged
What Counts as Structuring
The simplest example: you have $12,000 in cash to deposit, so you make two deposits of $6,000 on different days to keep the bank from filing a report. That is structuring. The same label applies if you spread cash across multiple branches, send different people to the counter, or break a single payment to a business into several smaller ones. The slang term is “smurfing.”
What catches many people off guard is that the crime is the evasion itself, not what the money represents. A federal court has upheld a structuring conviction where prosecutors did not even allege the cash came from any illegal activity.1Financial Crimes Enforcement Network. Judge Rules Defendant Guilty of Structuring; No Connection to Criminal Activity Alleged A small business owner depositing legitimate cash receipts in sub-$10,000 batches to avoid paperwork is in the same statutory category as a drug trafficker laundering proceeds.
The $10,000 Reporting Rule Behind the Crime
The Bank Secrecy Act requires financial institutions to file a Currency Transaction Report (CTR) for every cash transaction over $10,000 in a single business day.2Financial Crimes Enforcement Network. The Bank Secrecy Act The implementing regulation, 31 C.F.R. § 1010.311, covers deposits, withdrawals, currency exchanges, and any other transfer involving physical currency above that amount.3eCFR. 31 CFR 1010.311
Making several smaller deposits in one day does not help. Banks must aggregate multiple cash transactions by or on behalf of the same person within a single business day, and if the total crosses $10,000 the bank files a CTR as though it were one transaction.4eCFR. 31 CFR 1010.313 – Aggregation All domestic branches of the same bank count as one institution for this purpose.
The reporting net is wider than banks. Any trade or business that receives more than $10,000 in cash in a single transaction, or in related transactions, must file IRS Form 8300 within 15 days.5Internal Revenue Service. Form 8300 and Reporting Cash Payments of Over $10,000 Car dealers, jewelers, real estate agents, and attorneys are all covered. Deliberately splitting payments to prevent a business from filing an accurate Form 8300 is itself a structuring violation.
How Investigators Catch It
Most structuring cases begin with a Suspicious Activity Report, not a dramatic raid. Banks monitor for patterns just below the threshold: repeated deposits of $9,000 or $9,500, visits to multiple branches, round-number cash activity that looks engineered. FinCEN guidance explicitly identifies structuring as a pattern that must be reported through a SAR, and banks have 30 calendar days after detecting the activity to file.6Financial Crimes Enforcement Network. Suspicious Activity Reporting Requirements
You will not learn that a report has been filed. Federal law forbids it. Under 31 U.S.C. § 5318(g)(2), no director, officer, employee, or agent of a financial institution may notify anyone involved in a transaction that it has been reported, and the same prohibition reaches government employees who learn about it.7Office of the Law Revision Counsel. 31 U.S. Code 5318 – Compliance, Exemptions, and Summons Authority Asking the teller gets you nowhere, and that is by design.
Reports from FinCEN’s database are reviewed by analysts and typically land with IRS Criminal Investigation, which has roughly 2,100 special agents whose jurisdiction covers tax crimes, money laundering, and Bank Secrecy Act violations.8Internal Revenue Service. Criminal Investigation (CI) at a Glance By the time a target hears from an agent, the government may already have months of transaction records in hand.
What Prosecutors Have to Prove
To convict, the government must show two things: that you knew financial institutions are required to report cash transactions over $10,000, and that you deliberately arranged your transactions to prevent that report.9Office of the Law Revision Counsel. 31 USC 5324 – Structuring Transactions to Evade Reporting Requirement Prohibited Prosecutors do not have to prove you knew structuring itself was a crime.
That standard is the product of a specific legislative fix. In 1994, the Supreme Court ruled in Ratzlaf v. United States that a structuring conviction required proof the defendant knew the structuring was unlawful.10Cornell Law Institute. Ratzlaf v. United States, 510 U.S. 135 (1994) Congress amended § 5324 the same year to remove the willfulness requirement.11United States Department of Justice. Criminal Resource Manual 2033 – Structuring “I didn’t know splitting deposits was illegal” is no longer a defense.
Prison Time and Fines
Section 5324(d) sets out two tiers of criminal punishment. A basic violation carries up to five years in federal prison and a fine of up to $250,000.9Office of the Law Revision Counsel. 31 USC 5324 – Structuring Transactions to Evade Reporting Requirement Prohibited
The enhanced tier doubles the exposure. If the structuring happens while violating another federal law, or as part of a pattern of illegal activity involving more than $100,000 in a 12-month period, the maximum climbs to ten years and the fine ceiling rises to $500,000.9Office of the Law Revision Counsel. 31 USC 5324 – Structuring Transactions to Evade Reporting Requirement Prohibited This is the tier that applies in cases tied to drug proceeds, tax evasion, or fraud.
The general federal statute of limitations is five years from the date of the offense, and each transaction in a structuring pattern can anchor its own clock.
Losing the Money: Forfeiture
Prison and fines are not the only exposure. The government can also take the money. Federal law provides three forfeiture paths: criminal forfeiture brought alongside a prosecution, civil judicial forfeiture filed as a lawsuit against the property itself, and administrative forfeiture handled by the seizing agency without going to court.12Federal Bureau of Investigation. Asset Forfeiture Civil forfeiture does not require a criminal conviction because the case is brought against the money.
This power drew heavy criticism after federal agencies seized bank accounts from small business owners with no connection to any underlying crime. The Department of Justice tightened its policy in response. Prosecutors generally cannot seize structured funds before filing criminal charges unless there is probable cause that the money came from unlawful activity or was intended to conceal or promote ongoing illegal conduct. Where no link to other criminal activity exists, seizure requires approval from the U.S. Attorney or the Chief of the Money Laundering and Asset Recovery Section.13United States Department of Justice. Asset Forfeiture Policy Manual 2025 Once funds are seized based on structuring alone, the prosecutor has 150 days to file an indictment or civil complaint or return the money.
Getting Seized Money Back
If the government takes your funds, you can file a petition for remission or mitigation asking the seizing agency, or the DOJ in judicial cases, to return all or part of the money. The petition must be filed within 30 days of the last publication date on forfeiture.gov or the deadline in your personal notice letter. There is no required format, but you need to describe your interest in the property, provide supporting documentation such as bank records, and sign under penalty of perjury.14Forfeiture.gov. Petition Information Missing the deadline forfeits the right to challenge through this process.
What to Do If Agents Contact You
Because of the tipping-off rule, many people under investigation have no warning until a federal agent appears at the door or a subpoena arrives. Anything said in that first conversation can be used in the prosecution. Structuring carries real penalties even without an underlying crime, and the intent standard is forgiving to the government. Retain a criminal defense attorney before answering questions about your banking activity, and do not try to explain the pattern on the spot.