What is a Currency Transaction Report (CTR)?

A Currency Transaction Report (CTR) is a mandatory filing that financial institutions must submit to the Financial Crimes Enforcement Network (FinCEN) whenever a customer conducts cash transactions exceeding $10,000 in a single business day. The requirement exists under the Bank Secrecy Act (BSA) and applies regardless of whether the transaction involves deposits, withdrawals, exchanges, or transfers of physical currency.

CTRs are not an indicator of wrongdoing. Large cash transactions are legal. The CTR simply creates a record that allows law enforcement and regulators to trace large cash movements through the financial system.

What triggers a CTR

The filing requirement is triggered by physical currency, meaning coin and paper money, exceeding $10,000 in a single business day. The threshold applies per customer, not per transaction. This means multiple smaller transactions conducted by the same person in the same day are aggregated together.

If a customer makes three separate cash deposits of $4,000 each in a single day, totaling $12,000, a CTR is required even though no single deposit exceeded the threshold. The aggregation rule exists specifically to prevent circumvention through splitting transactions.

A few important boundaries on what counts:

• The threshold applies to cash only. Wire transfers, ACH payments, checks, and digital assets are not subject to CTR requirements
• Debits and credits are aggregated separately, not netted against each other. If a customer deposits $8,000 and withdraws $6,000 on the same day, neither individually triggers a CTR, but the institution still tracks the activity
• The threshold has not been adjusted for inflation since it was set in 1972. A December 2024 GAO report found the inflation-adjusted equivalent would be approximately $72,880, and that using an adjusted threshold would have reduced the volume of CTRs filed by at least 90 percent annually since 2014

What goes in a CTR

CTRs are filed electronically with FinCEN using Form 112. The form captures detailed information about the transaction and the parties involved, including:

• The full name, address, date of birth, Social Security number, and government-issued ID details of the person conducting the transaction
• If the transaction is conducted on behalf of another party, that party's identifying information as well
• The type, amount, and date of the transaction
• The financial institution's identifying information and the branch where the transaction occurred
• Whether the CTR represents a single transaction or multiple aggregated transactions

FinCEN expects complete and accurate filings. Incomplete or inaccurate CTRs can result in compliance findings. Institutions that receive data quality notices from FinCEN are required to take corrective action.

Structuring: the key prohibition

The most important compliance risk associated with CTRs is structuring, which is the deliberate breaking up of transactions to keep them below the $10,000 reporting threshold. Structuring is a federal crime under 31 USC 5324, regardless of whether the underlying funds are from a legitimate source.

If a customer who normally makes large cash deposits suddenly starts making multiple deposits just under $10,000, that pattern is a red flag. Financial institutions are required to file a Suspicious Activity Report (SAR) for suspected structuring activity, and employees who knowingly assist customers in structuring transactions face criminal liability alongside the customer.

Structuring does not require intent to launder money. The act of deliberately keeping transactions below the threshold to avoid reporting is itself the offense.

CTR vs. SAR

CTRs and Suspicious Activity Reports (SARs) are both BSA reporting requirements, but they work differently. Understanding the distinction matters for anyone building a compliance program.

A CTR is automatic and objective. Any covered cash transaction above $10,000 requires a CTR, regardless of whether the transaction seems suspicious. No judgment call is involved.

A SAR is discretionary and judgment-based. It is filed when a financial institution suspects that a transaction involves proceeds of illegal activity, is designed to evade reporting requirements, or lacks a lawful purpose, regardless of the dollar amount. A $500 transaction can trigger a SAR if the circumstances warrant it. A $50,000 cash transaction triggers a CTR automatically and may also trigger a SAR if something about it seems suspicious.

Both reports are filed with FinCEN and are subject to strict confidentiality rules. A financial institution cannot inform a customer that a CTR or SAR has been filed about them.

Who must file CTRs

The CTR filing obligation applies to a broad set of financial institutions under the BSA:

• Banks, credit unions, and savings associations
• Money services businesses, including money transmitters, currency exchangers, and check cashers
• Casinos and card clubs above certain revenue thresholds
• Broker-dealers

For fintechs and payment service providers operating as money services businesses, CTR obligations apply to the same extent as traditional MSBs. FinCEN has clarified that crypto ATM operators and virtual currency exchangers that accept or dispense physical cash are subject to CTR requirements when transactions exceed the threshold.

Exemptions exist for certain categories of customers, including banks, listed companies on major US exchanges, and government agencies, where the filing burden outweighs the investigative value. These exemptions are established through a formal designation process using FinCEN Form 110 and require ongoing due diligence. For most MSBs and fintechs, exemptions generally do not apply.

CTRs and the broader compliance framework

CTR filing is one component of a complete BSA/AML program. It operates alongside KYC requirements, SAR filing obligations, transaction monitoring, and OFAC screening. Each addresses a different layer of financial crime risk.

Financial institutions filed approximately 167 million CTRs in fiscal years 2014 through 2023, according to the GAO. Despite this volume, law enforcement agencies accessed only a small percentage of those reports through FinCEN's BSA portal. The GAO's December 2024 report identified this as a significant inefficiency and recommended that FinCEN consider adjusting the reporting threshold and clarifying aggregation requirements to reduce filer burden without reducing the program's utility to investigators.

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