How Money Laundering Works: Statutes, Forfeiture, and Penalties

Federal money laundering laws and penalties are set mainly by two statutes: 18 U.S.C. § 1956 carries up to 20 years in prison and a fine of up to $500,000 or twice the value of the funds involved, whichever is greater, while 18 U.S.C. § 1957 carries up to 10 years and a fine of up to twice the criminally derived property in the transaction. On top of prison and fines, a conviction almost always triggers forfeiture of the money and any property traceable to it. Federal prosecutors treat laundering as seriously as the crime that produced the money.

18 U.S.C. § 1956: The Primary Laundering Statute

Section 1956 makes it a crime to conduct a financial transaction when you know the money represents proceeds of some illegal activity, and either you intend to promote further criminal activity or you know the transaction is designed to hide where the money came from. The same statute reaches money moved across international borders with that knowledge or intent.¹

A conviction carries up to 20 years in federal prison and a fine of up to $500,000 or twice the value of the property involved in the transaction, whichever is greater.¹ The “twice the value” provision matters because many laundering cases involve millions of dollars, which pushes the actual fine far beyond the $500,000 statutory cap.

To convict under § 1956, prosecutors have to prove two things: that the defendant knew the money came from some form of illegal activity, and that the defendant specifically intended either to promote the crime or to conceal the proceeds. That intent requirement makes § 1956 harder to prove than its companion statute, but it is also the one that carries the stiffer sentence.

18 U.S.C. § 1957: Transactions Over $10,000

Section 1957 targets anyone who knowingly engages in a monetary transaction involving more than $10,000 in criminally derived property.² This is the statute prosecutors reach for when they can prove the money was dirty but cannot prove the defendant intended to hide it or promote more crime. The government only needs to show the defendant knew the property was criminally derived and that the transaction exceeded $10,000.

Convictions carry up to 10 years in prison, and the court can impose a fine of up to twice the amount of the criminally derived property in the transaction.² The maximum prison time is half of what § 1956 allows, but the lower proof threshold makes § 1957 easier to charge. Someone who simply deposits drug proceeds into a bank account, with no elaborate concealment, can be charged under § 1957 as long as the deposit tops $10,000.

What Crimes Can Produce “Dirty Money”

Money laundering is always a secondary offense. You cannot launder money unless the money came from a “specified unlawful activity,” the federal term for the underlying crime that generated the proceeds. The list is long and covers most serious federal offenses and certain foreign crimes. The main categories:

Drug trafficking, including manufacturing, importing, or distributing controlled substances, and continuing criminal enterprises.
Fraud offenses: bank fraud, wire fraud, mail fraud, healthcare fraud, securities fraud, and schemes to defraud a foreign bank.
Violent crimes such as murder, kidnapping, robbery, extortion, and arson.
Public corruption, including bribery of public officials, embezzlement of public funds, and RICO offenses.
Smuggling and export violations, including smuggling goods and violating export control laws on weapons and restricted technology.
Terrorism financing and material support to terrorist organizations.
Human trafficking, sexual exploitation of children, and forced labor.

The statute also reaches offenses against foreign nations when the financial transaction occurs at least partly in the United States.³ Laundering foreign drug proceeds through a U.S. bank account is prosecutable here.

Related Federal Crimes: Structuring and Bulk Cash Smuggling

Two offenses frequently get charged alongside laundering, and both are federal crimes even when the money itself is clean.

Structuring Deposits to Avoid Reporting

Under 31 U.S.C. § 5324, anyone who breaks up transactions to evade Bank Secrecy Act reporting or recordkeeping requirements faces up to five years in prison. If the structuring is part of a broader pattern of illegal activity involving more than $100,000 in a 12-month period, the maximum doubles to 10 years.⁴

This catches people with no connection to organized crime who simply do not want their cash reported. A small business owner who deposits cash in $9,500 increments to “avoid paperwork” has committed a federal crime. The statute does not require that the underlying money be illegal, only that the person deliberately structured transactions to dodge the reporting threshold.

Bulk Cash Smuggling Across the Border

Under 31 U.S.C. § 5332, knowingly concealing more than $10,000 in currency and transporting it into or out of the United States with intent to evade currency reporting requirements carries up to five years in prison.⁵ The statute also mandates forfeiture of the currency itself, the container used to hide it, and any vehicle or conveyance used to transport it. If the seized property is unavailable, the court can enter a personal money judgment against the defendant for the equivalent value.

Asset Forfeiture: Often the Harshest Consequence

Federal forfeiture frequently exceeds the prison sentence in practical impact. Under 18 U.S.C. § 981, any property involved in a money laundering transaction, or traceable to one, is subject to civil forfeiture to the United States. “Proceeds” is defined broadly to include any property obtained directly or indirectly from the offense, not just net profits.⁶

In practice the government can take bank accounts, real estate, vehicles, business interests, and any other assets connected to the laundering. Title to forfeitable property vests in the government at the moment the crime is committed, not when a court issues a forfeiture order. That means a later transfer of the property to a third party does not defeat the government’s claim.⁶

Forfeiture comes in three forms. Criminal forfeiture is part of sentencing and requires a conviction. Civil forfeiture is an action against the property itself and does not require a criminal charge against the owner. Administrative forfeiture lets the seizing agency forfeit property valued under $500,000 without court involvement.⁷ Civil and administrative forfeiture are aggressive tools because the government can take property from people who were never charged, as long as it shows the property’s connection to illegal activity.

How Transactions End Up in Front of Prosecutors

Most laundering cases start with reports banks are legally required to file. The Bank Secrecy Act authorizes the Treasury Department to impose reporting and recordkeeping requirements on financial institutions.⁸ Two reports do most of the work.

A Currency Transaction Report must be filed for any deposit, withdrawal, exchange, or other transaction involving more than $10,000 in currency.⁹ Multiple same-day transactions that add up to more than $10,000 are aggregated, so splitting a $15,000 deposit between a morning and afternoon visit to the same bank still triggers the report.⁸

A Suspicious Activity Report is filed when a bank spots a transaction that appears to involve criminal proceeds, has no apparent lawful purpose, or deviates from the customer’s usual pattern. Transactions involving potential money laundering or BSA violations trigger a SAR at $5,000. Other suspected criminal violations require a SAR at $5,000 when a suspect can be identified and $25,000 when no suspect is identified. SARs go to the Financial Crimes Enforcement Network, which analyzes the data and generates leads for law enforcement. Banks are prohibited from telling the customer that a SAR was filed, so you will never get notice that your bank flagged one of your transactions.¹⁰

Reach Beyond U.S. Borders

Federal money laundering law is not limited to transactions that happen entirely within the United States. Section 1956 specifically criminalizes transporting or transmitting funds from the U.S. to a foreign country, or from a foreign country into the U.S., when the person knows the money represents criminal proceeds and the transfer is designed to conceal their origin or evade reporting.¹ The penalties are the same as for a domestic violation: up to 20 years and fines reaching twice the value of the funds.

Federal courts also have jurisdiction over foreign persons and foreign financial institutions when the transaction touches the United States, including when a foreign bank maintains an account at a U.S. financial institution.¹ Because the U.S. dollar is the dominant reserve currency and most international wire transfers pass through U.S. correspondent banks at some point, this provision gives federal prosecutors a long reach into foreign laundering operations.

1
Office of the Law Revision Counsel. 18 USC 1956 – Laundering of Monetary Instruments
2
Office of the Law Revision Counsel. 18 USC 1957 – Engaging in Monetary Transactions in Property Derived From Specified Unlawful Activity
3
Office of the Law Revision Counsel. 18 US Code 1956 – Laundering of Monetary Instruments
4
Office of the Law Revision Counsel. 31 USC 5324 – Structuring Transactions to Evade Reporting Requirement Prohibited
5
Office of the Law Revision Counsel. 31 USC 5332 – Bulk Cash Smuggling Into or Out of the United States
6
Office of the Law Revision Counsel. 18 US Code 981 – Civil Forfeiture
7
U.S. Department of the Treasury. Forfeiture Overview
8
FinCEN.gov. The Bank Secrecy Act
9
eCFR. 31 CFR 1010.311
10
FFIEC BSA/AML InfoBase. Suspicious Activity Reporting