OFAC 50 Percent Rule

The OFAC 50 Percent Rule is an interpretive doctrine issued by the U.S. Department of the Treasury's Office of Foreign Assets Control (OFAC) that automatically extends sanctions consequences from designated persons to the corporate entities they own. The rule has no single statutory source; rather, it is a construction of the property-blocking authorities granted under the International Emergency Economic Powers Act (IEEPA, 50 U.S.C. §§ 1701–1708), the Trading with the Enemy Act (50 U.S.C. §§ 4301 et seq.), and program-specific executive orders such as E.O. 13599 (Iran), E.O. 13662 (Russia/Ukraine-related), and E.O. 13818 (Global Magnitsky). OFAC first articulated the doctrine in a 2008 guidance on Specially Designated Nationals (SDN), revised it in 2014 to introduce the aggregation principle, and consolidated it in the August 13, 2014 "Revised Guidance on Entities Owned by Persons Whose Property and Interests in Property Are Blocked." The rule reflects the longstanding principle that a blocked person's property interests cannot be insulated by interposing corporate veils.

Mechanically, the rule operates as a strict, bright-line test applied without need for a separate OFAC designation action. If one blocked person holds 50 percent or more of an entity's equity, that entity is itself blocked—its property and interests in property within U.S. jurisdiction or in the possession of a U.S. person must be frozen, reported to OFAC within 10 business days under 31 C.F.R. § 501.603, and may not be dealt in absent a license. Critically, the 2014 revision introduced aggregation: if two or more blocked persons together own 50 percent or more of an entity, that entity is likewise blocked, even if no single owner crosses the threshold. Thus an entity owned 30 percent by SDN A and 25 percent by SDN B is blocked by aggregation at 55 percent.

The rule cascades through ownership tiers. An entity blocked under the 50 Percent Rule is itself a "blocked person" for purposes of the rule, so its own 50-percent-or-greater subsidiaries become blocked, and so on indefinitely down the corporate tree. OFAC's guidance further warns that ownership below 50 percent does not immunize an entity: a blocked person exercising control through minority stakes, board seats, or contractual arrangements creates significant sanctions risk, and U.S. persons are cautioned to conduct due diligence even where the 50-percent threshold is not met. The rule applies to ownership of equity interests; mere debt holdings, licensing arrangements, or contractual rights do not by themselves trigger the rule, although OFAC has indicated that certain economic interests functionally equivalent to ownership may be scrutinized.

Contemporary application is visible across multiple programs. Following Russia's February 2022 invasion of Ukraine, OFAC designations of figures such as Gennady Timchenko, Alisher Usmanov, and Suleiman Kerimov immediately captured sprawling networks of holding companies, real estate vehicles, and yachts through the rule's automatic operation, without requiring individual entity-by-entity designations. The April 2018 designation of Oleg Deripaska forced En+ Group and Rusal to undertake corporate restructurings, eventually delisted from the SDN List in January 2019 after Deripaska's stake was reduced below 50 percent. In the Venezuela context, the 2019 designation of PdVSA under E.O. 13850 swept in its subsidiaries including CITGO Holding, whose operations required a series of OFAC general licenses to continue. Treasury guidance issued by OFAC's Compliance and Enforcement Division routinely emphasizes the rule in FAQs (notably FAQs 398–402).

The 50 Percent Rule must be distinguished from the sectoral sanctions regime administered through Directives issued under E.O. 13662 and similar instruments, where ownership at 50 percent triggers application of the relevant Directive's restrictions rather than full blocking. It is also distinct from the European Union's "ownership and control" standard under Council Regulation interpretive notes, which evaluates control on a functional basis without a strict numerical threshold and may capture entities at lower equity levels. The U.K.'s Office of Financial Sanctions Implementation (OFSI) applies a comparable but not identical "more than 50 percent" ownership test combined with a separate control test under the Sanctions and Anti-Money Laundering Act 2018.

Edge cases generate persistent compliance challenges. Bearer shares, nominee arrangements, trust structures, and jurisdictions with opaque beneficial-ownership registries make 50-percent calculations difficult; OFAC expects U.S. persons to undertake risk-based diligence and has imposed civil penalties for failures (e.g., the 2019 Apollo Aviation settlement, the 2020 Amazon settlement). The rule does not capture entities exactly 49.99 percent owned, a gap that designated oligarchs have historically exploited through token divestitures—prompting Treasury statements that sham transfers will not be respected. Following the February 2024 designation expansions targeting Russian financial infrastructure and the introduction of secondary-sanctions risks under E.O. 14114, banks and corporates have increasingly screened counterparties through specialized ownership databases such as Dow Jones, Refinitiv, and Sayari.

For the working practitioner, the 50 Percent Rule is the single most consequential interpretive doctrine in U.S. sanctions law because it determines the actual perimeter of any designation. A diplomat negotiating asset-recovery arrangements, a compliance officer building a screening program, or a journalist tracing oligarch wealth must read each new SDN entry not as a single name but as the apex of a potentially vast tree of derivatively blocked entities. Mastery of the rule—including its aggregation logic, its cascade through subsidiaries, and its interaction with control-based risk—is foundational to operating in any transaction touching U.S. jurisdiction.