Line4

Search line4.ai

United States · Last checked 13 November 2026

Financial Crimes Enforcement Network (FinCEN): regulatory returns

A bureau of the US Department of the Treasury that administers the Bank Secrecy Act. It collects the reports described here from banks and other financial institutions, money services businesses, and trades and businesses that handle large cash sums, to safeguard the financial system from money laundering, terrorist financing and other financial crime. Source

Website: www.fincen.gov/

8returns
2 of 8returns with published validation rules
1 of 8returns with firm-by-firm public data
12official documents, 1 with a SHA-256 fingerprint

File formats: PDF, Web form, XML.

What this page covers

The Bank Secrecy Act reports financial institutions and other firms file through FinCEN's BSA E-Filing System or, for currency physically crossing the US border, through US Customs and Border Protection: the Suspicious Activity Report (SAR), the Currency Transaction Report (CTR), the Designation of Exempt Person (DOEP), the Report of Cash Payments Over $10,000 Received in a Trade or Business (FinCEN Form 8300), the Report of International Transportation of Currency or Monetary Instruments (CMIR), the Registration of Money Services Business (RMSB), the Report of Foreign Bank and Financial Accounts (FBAR), and Beneficial Ownership Information (BOI) reporting as it stands after FinCEN's August 2026 final rule. FBAR is primarily an individual's filing obligation rather than a firm's, and is included with that caveat; FinCEN's other regulatory work (advisories, Financial Trend Analyses, FinCEN Exchange and enforcement matters) is left out. Source

How firms file

  • BSA E-Filing System

    FinCEN's free, web-based system for filing the SAR, CTR, DOEP, RMSB, Form 8300 and FBAR, either as a single (discrete) filing or in batch files built to FinCEN's technical specifications. Since 1 April 2013 it accepts only the current FinCEN report versions, not the legacy paper-style reports. Source

  • CBP Electronic CMIR

    US Customs and Border Protection's electronic system for filing the CMIR (FinCEN Form 105), reported to the Customs officer in charge at the port of entry or departure rather than to FinCEN directly. Source

  • BOI E-Filing System

    FinCEN's system for filing a Beneficial Ownership Information report, now used only by the foreign reporting companies the narrowed rule still covers. Source

The returns (8)

Plain name first, the FinCEN's code in brackets. Each return has its own page: what it is for, who files it, the deadline, the templates, the validation rules, the documents and the sources.

Suspicious Activity Report (FinCEN SAR, Form 111)Group: Suspicious activity and currency reportingHow often: When an event happensFormat: Web form, XMLIn force
Currency Transaction Report (FinCEN CTR, Form 112)Group: Suspicious activity and currency reportingHow often: When an event happensFormat: Web form, XMLIn force
Designation of Exempt Person (FinCEN DOEP, Form 110)Group: Suspicious activity and currency reportingHow often: VariesFormat: Web form, XMLIn force
Report of cash payments over $10,000 in a trade or business (FinCEN Form 8300)Group: Trade and business cash reportingHow often: When an event happensFormat: Web formIn force
Report of international transportation of currency or monetary instruments (CMIR, FinCEN 105)Group: Trade and business cash reportingHow often: When an event happensFormat: Web form, PDFIn force
Registration of money services business (FinCEN RMSB, Form 107)Group: Money services businessesHow often: VariesFormat: Web form, XMLIn force
Report of foreign bank and financial accounts (FBAR, Form 114)Group: Individual filings (included with a caveat)How often: YearlyFormat: Web formIn force
Beneficial ownership information reporting (BOI report)Group: Beneficial ownershipHow often: OnceFormat: Web formBeing replaced

Download this list: FinCEN returns (CSV) or everything on this page (JSON), free to reuse under CC BY 4.0 with the credit line on the library page.

Data the FinCEN publishes from the returns

  • MSB Registrant Search

    Firm by firm · Web search

    A public search of registered money services businesses. Source

    From: FinCEN RMSB (Form 107)

    Reuse: No reuse terms specific to this dataset were found; see the licence section for FinCEN's general public-information notice.

Reuse terms for the FinCEN's documents

FinCEN.gov Privacy Policy (Site Policies and Notices), checked 13 November 2026. In the FinCEN's words:

This website is provided as a public service and is considered public information, which may be distributed or copied in accordance with applicable law. Use of appropriate byline/photo/image credits is requested.
Can others share copies?
Allowed.
Conditions
Appropriate byline, photo and image credits are requested on reuse, as a request rather than a stated requirement. US federal government works also carry no domestic copyright (17 U.S.C. 105).
What the library does
Links each document on the regulator's own site, with its size and SHA-256 fingerprint so a change can be spotted. Documents are never hosted on line4.ai.

What could not be verified

Said plainly, so nobody relies on a fact the sources do not give.

  • The exact SAR filing deadline (the commonly cited 30 days, extendable to 60 days with no suspect identified) was not confirmed on a fincen.gov page read this round; it is recorded as not stated rather than carried over from memory.
  • 31 CFR 1010.306(c) states the FBAR is due on or before 30 June each year, but FinCEN's own FBAR page lists many separate notices extending or resetting that date over the years (including a 2019 'New Due Date for FBARs' notice); the page's plain text did not state, in one place, what the FBAR's current standing due date is, so both the regulatory text and the existence of later administrative changes are recorded rather than a single reconciled date.
  • The CMIR's proposed split into a traveller's Form 105 and a shipper's or receiver's Form 106 was noted on a FinCEN news release found by search but not fetched and read directly, so it is not relied on; the current single CMIR form is described instead.
  • ecfr.gov answered a CAPTCHA page for other regulators built this round and was not attempted again for FinCEN; govinfo.gov's 2025 annual edition of 31 CFR Part 1010 was used instead.
  • Whether a further periodic FinCEN return exists beyond the eight built here (for example anything specific to residential real estate reporting, which FinCEN's own navigation lists as a topic) was not checked within this round's request budget.

Sources

Knowing exactly what is collected, in what format and under which rules is the first step to real-time supervision. See every regulator in the regulatory returns library.

Line4's own text, and the way Line4 has collected and arranged these records, are free to reuse under CC BY 4.0. Please credit: “Source: Line4 regulatory submissions library (CC BY 4.0), https://www.line4.ai”. The facts themselves belong to no one. The regulators' document titles, template names, quoted terms and documents belong to them and are not covered by this licence: see FinCEN's reuse terms. This describes what regulators publish. It is not legal or regulatory advice: always rely on the regulator's own text. Not affiliated with or endorsed by any regulator.

Last checked 13 November 2026.