Enigma Knowledge

Glossary

BSA: Bank Secrecy Act

February 5, 2026

What the Bank Secrecy Act is, its reporting requirements, and how BSA shapes US anti-money laundering compliance.

The Bank Secrecy Act (BSA), enacted in 1970, is the primary US anti-money laundering law requiring financial institutions to assist government agencies in detecting and preventing financial crimes.

Core Reporting Requirements

CTR (Currency Transaction Report)

  • Trigger: Cash transactions
  • Threshold: >$10,000

SAR (Suspicious Activity Report)

  • Trigger: Suspected illegal activity
  • Threshold: >$5,000 (or any amount if terrorism suspected)

Key BSA Provisions

  • Recordkeeping: Maintain records of transactions and customer information
  • Reporting: File CTRs and SARs with FinCEN
  • Customer Identification: Verify customer identity at account opening
  • AML Program: Maintain policies, procedures, and controls

BSA Expansion Over Time

1970

  • Legislation: Bank Secrecy Act
  • Added Requirements: Original CTR reporting

2001

  • Legislation: USA PATRIOT Act
  • Added Requirements: CIP, enhanced AML programs

2016

2021

BSA and KYB

The BSA requires financial institutions to know their business customers—driving KYB requirements. The CDD Rule specifically mandates identifying beneficial owners of legal entity customers.

FinCEN administers and enforces BSA compliance.


Related: AML | FinCEN | SAR | CTR