Category: Sanctions Programs

50 Percent Rule

Also known as: OFAC 50 Percent Rule, OFAC 50% Rule

Simply put

The 50 Percent Rule is a US sanctions principle from the Office of Foreign Assets Control (OFAC) that extends sanctions to companies owned by people or entities already on a sanctions list. Under this rule, if one or more blocked persons together own 50 percent or more of a company, that company is generally treated as blocked too, even if it is not named on the list itself. The rule is designed to stop sanctioned parties from evading restrictions by operating through the businesses they own.

Formal definition

OFAC's 50 Percent Rule provides that the property and interests in property of any entity that is directly or indirectly owned, in the aggregate, 50 percent or more by one or more blocked persons are themselves blocked, regardless of whether the entity is separately identified on OFAC's Specially Designated Nationals and Blocked Persons (SDN) List or other restricted lists. The rule aggregates the ownership interests held by multiple blocked persons and captures indirect ownership through intermediate entities. It is a US sanctions measure intended to prevent circumvention of designations through ownership structures; note that it is framed in terms of aggregate ownership and does not, by its terms, address entities that are controlled but not owned at the 50 percent threshold, and OFAC guidance addresses control-based risks separately. Practitioners should also distinguish this rule from other agencies' comparable ownership-based rules (for example, a separate BIS 50% rule), and confirm scope, thresholds, and application against current OFAC guidance and the relevant sanctions program.

Why it matters

The 50 Percent Rule addresses one of the most persistent challenges in sanctions compliance: designated parties attempting to continue accessing the financial system through the entities they own. Because a company can be blocked under this rule even when it does not itself appear on OFAC's Specially Designated Nationals and Blocked Persons (SDN) List, obliged parties cannot rely on name-matching against published lists alone. An entity that returns no direct hit may nonetheless be blocked by operation of the rule if blocked persons hold, in the aggregate, 50 percent or more of it. This creates significant exposure for financial institutions, corporates, and other US persons who transact with counterparties without tracing their ownership.

The rule matters because US sanctions violations are generally assessed on a strict-liability basis in the civil enforcement context, meaning a party may face liability for dealing with a blocked entity even without knowledge that the counterparty was owned by designated persons. This elevates the importance of beneficial ownership analysis, since legal ownership visible on a corporate registry may not reveal the chain of blocked persons behind an intermediate entity. The rule captures indirect ownership through layered structures, so a screening process that stops at the immediate counterparty can miss blocked status further up the ownership chain.

Practitioners should note the rule's stated scope boundaries. By its terms, it aggregates ownership interests and is framed around the 50 percent threshold; it does not, on its face, treat as blocked an entity that is controlled but not owned at that threshold, though OFAC guidance addresses control-based risks separately. The rule should also not be conflated with comparable ownership-based rules maintained by other US agencies, such as a separate rule administered by the Bureau of Industry and Security (BIS). Exact scope, thresholds, and application should be confirmed against current OFAC guidance and the specific sanctions program at issue.

Who it's relevant to

Sanctions compliance officers

Those responsible for sanctions programs at US persons and institutions must build ownership-tracing into their screening workflows, since name-based screening against the SDN List alone will not detect entities blocked solely by operation of the 50 Percent Rule. This includes designing procedures to aggregate ownership held by multiple blocked persons and to assess indirect ownership through intermediate entities.

Financial intelligence and screening analysts

Analysts investigating potential matches need to distinguish a direct SDN hit from a derived blocked status arising under the rule, and to escalate cases where an unlisted counterparty may be owned at or above the threshold by designated persons. Because the rule captures indirect and aggregated ownership, analysts often require beneficial ownership data beyond immediate legal ownership.

Onboarding and due diligence teams

Teams conducting customer due diligence and beneficial ownership identification are positioned to surface the ownership information needed to apply the rule. Establishing who ultimately owns a counterparty, and in what proportions, supports the ownership aggregation that the rule requires, though such measures manage rather than eliminate sanctions exposure.

Legal, risk, and enforcement professionals

Given that civil sanctions liability is generally assessed on a strict-liability basis, legal and risk professionals advise on exposure where a counterparty may be blocked despite not being listed. They also help distinguish the OFAC 50 Percent Rule from separately administered ownership-based rules, such as a comparable rule maintained by BIS, and confirm application against current OFAC guidance and the relevant program.

Inside 50 Percent Rule

OFAC Aggregation Principle

The core concept, articulated in OFAC guidance, that an entity owned 50 percent or more in the aggregate, directly or indirectly, by one or more blocked persons is itself considered blocked, even if it does not appear on the Specially Designated Nationals (SDN) List by name.

Aggregation of Ownership Interests

Ownership held by multiple blocked persons is added together. Several separate blocked owners each holding less than 50 percent can collectively cross the threshold, causing the entity to be treated as blocked.

Direct and Indirect Ownership

The rule captures ownership held through intermediate entities as well as directly. Indirect ownership is generally traced through the chain of entities to determine the ultimate blocked ownership percentage.

Ownership Versus Control

The 50 Percent Rule addresses ownership specifically. OFAC has separately expressed concern about control by blocked persons, but under this particular rule an entity controlled but not 50-percent-owned by a blocked person is not automatically blocked, though it may still raise sanctions risk.

Automatic Blocking Effect

An entity meeting the threshold is treated as blocked by operation of the rule itself, without the need for a separate OFAC listing, meaning obliged parties must screen beyond the face of the SDN List.

US Sanctions Scope

This is a US OFAC concept applicable to US persons and transactions with a US nexus. Other jurisdictions, such as the UK and EU, apply their own ownership-and-control tests that differ in threshold, aggregation approach, and treatment of control.

Common questions

Answers to the questions practitioners most commonly ask about 50 Percent Rule.

Does the 50 Percent Rule mean an entity is only blocked if it appears on OFAC's SDN List?

No. This is a common misconception. Under OFAC's 50 Percent Rule guidance, an entity can be blocked even if it is not itself named on the SDN List. The rule provides that any entity owned, in the aggregate, 50 percent or more by one or more blocked persons is itself considered blocked, regardless of whether that entity is separately listed. Screening against the SDN List alone is therefore not sufficient to identify all blocked entities; you must also analyze ownership.

If a blocked person owns exactly 50 percent of an entity, is that entity below the threshold and therefore not blocked?

No. The threshold is 50 percent or more, meaning an entity owned exactly 50 percent by blocked persons is treated as blocked under OFAC's guidance. The rule also aggregates the ownership interests of multiple blocked persons, so ownership does not need to be held by a single blocked person to reach the threshold.

How should aggregation of ownership interests be handled when multiple blocked persons hold stakes in the same entity?

Under OFAC's guidance, the ownership interests of multiple blocked persons are added together when determining whether the 50 percent threshold is met. Operationally, this means an entity should be analyzed for the combined holdings of all blocked persons in its ownership structure, rather than assessing each blocked owner in isolation. Confirm the specific application against current OFAC guidance.

How does the rule apply to indirect or layered ownership through intermediate entities?

The rule can apply where blocked persons hold ownership indirectly through one or more intermediate entities, which is why beneficial ownership analysis, not just direct legal ownership, is generally necessary. Tracing ownership through multiple layers can be operationally complex, and firms typically rely on ownership data and screening tools to identify chains where aggregated blocked ownership reaches the threshold. Exact treatment of layered structures should be confirmed against applicable OFAC guidance.

What are the practical implications for an entity that is deemed blocked under the 50 Percent Rule but not separately listed?

In practice, an entity that meets the ownership threshold is generally treated as if it were a blocked person, meaning the same handling obligations that apply to listed parties may apply to it. Because such entities may not surface through name-based SDN List screening alone, firms typically supplement screening with ownership due diligence to detect them. Specific obligations should be confirmed against the applicable OFAC sanctions program and guidance.

Does the 50 Percent Rule address control by blocked persons, or only ownership?

As articulated in OFAC's guidance, the 50 Percent Rule is framed around ownership meeting the threshold rather than control alone. Firms should nonetheless be aware that control-based risks can raise separate considerations under OFAC guidance, and that reliance on the ownership test does not by itself resolve every situation involving blocked-person influence. Confirm the precise scope against current OFAC guidance.

Common misconceptions

If an entity is not on the SDN List, it is safe to transact with.

Under the 50 Percent Rule, an entity absent from the SDN List can nonetheless be blocked if it is owned 50 percent or more, in aggregate, directly or indirectly, by one or more blocked persons. Screening only against named lists can therefore miss blocked entities.

The rule captures control as well as ownership, so any entity a blocked person controls is automatically blocked.

This specific rule is framed around the 50 percent ownership threshold, not control. OFAC has voiced concern about control by blocked persons and it may elevate sanctions risk, but control alone does not automatically block an entity under the 50 Percent Rule.

A single blocked owner must hold 50 percent for the entity to be blocked.

Ownership interests of multiple blocked persons are aggregated. Several blocked owners each holding minority stakes can together meet or exceed the 50 percent threshold, resulting in the entity being treated as blocked.

Best practices

Screen beyond the SDN List by analyzing beneficial ownership structures to identify entities that may be blocked through aggregate direct or indirect ownership by one or more blocked persons.

Aggregate the ownership interests of all identified blocked persons when assessing whether an entity crosses the 50 percent threshold, rather than evaluating each owner in isolation.

Trace ownership through intermediate entities to capture indirect holdings, documenting the ownership chain used to reach the calculated percentage.

Distinguish ownership from control in your analysis, and separately assess and escalate sanctions risk where a blocked person exercises control without meeting the 50 percent ownership threshold.

Recognize that this is a US OFAC concept and apply the applicable jurisdiction's own ownership-and-control test for UK, EU, or other regimes, as thresholds and aggregation approaches differ.

Confirm the precise application, threshold interpretation, and any updates against current OFAC guidance and the relevant sanctions authority before relying on a screening outcome.