OFAC 50 Percent Rule: A Practical Compliance Guide

For organizations operating within or interacting with the U.S. financial system, screening customer and counterparty names against government watchlists is a standard compliance procedure. However, checking a legal entity against the U.S. Office of Foreign Assets Control (OFAC) Specially Designated Nationals and Blocked Persons List (SDN List) is only the beginning.

Many entities that are legally prohibited from participating in U.S. transactions never appear on the SDN List. Instead, they are blocked by operation of law through their ownership structure. This mechanism is known as the OFAC 50 Percent Rule.

LEGAL & REGULATORY NOTICE This document reflects publicly available regulatory guidance as of October 2026. It is intended for educational and research purposes and does not constitute legal advice. Organizations must assess their specific transaction, jurisdiction, and applicable sanctions program before making compliance decisions.

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1. What Is the OFAC 50 Percent Rule?

The OFAC 50 Percent Rule states that any entity owned 50 percent or more, whether directly or indirectly, by one or more blocked persons is itself considered a blocked person. This applies regardless of whether the entity is specifically named on the SDN List.

When an entity is deemed "blocked" under this rule, U.S. persons must treat it exactly as if it were an SDN. All property and interests in property of the entity that are in the United States, or that come within the possession or control of a U.S. person, must be frozen immediately.

Furthermore, U.S. persons are generally prohibited from:

• Opening or maintaining accounts for the blocked entity.
• Processing transactions, payments, or wire transfers involving the entity.
• Providing or receiving goods, services, financing, insurance, or investment.
• Facilitating any prohibited transaction through a third party or non-U.S. person.

Applicability to U.S. and Non-U.S. Persons

The 50 Percent Rule directly governs the actions of U.S. persons, which includes U.S. citizens, permanent resident aliens, entities organized under U.S. law (including foreign branches), and any person physically located within the United States.

However, non-U.S. persons are not immune. A foreign entity can face severe exposure if it causes a U.S. person to violate sanctions, facilitates a prohibited transaction through the U.S. financial system (such as clearing a payment in U.S. dollars), or deals in U.S.-origin goods subject to specific sanctions authorities.

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2. Ownership Versus Control

One of the most misunderstood aspects of the 50 Percent Rule is the distinction between ownership and control. OFAC has explicitly stated that the 50 Percent Rule is based entirely on ownership, not on control alone.

The Limits of the Control Test

If a blocked person controls an entity (perhaps by holding the right to appoint the board of directors, exercising management authority, or utilizing contractual rights) but owns less than 50 percent of the equity, the entity is not automatically blocked under the 50 Percent Rule.

However, treating this distinction as a compliance safe harbor is a significant operational error:

• Separate Designation Risk: OFAC actively utilizes control as a criterion to separately designate and add an entity to the SDN List.
• Prohibited Dealings: Any transaction involving the blocked person acting in their capacity as an officer, director, or agent may be strictly prohibited.
• Sanctions Evasion: Complex control structures designed to skirt the 50 percent threshold frequently trigger investigations into sanctions evasion and hidden agency.

Representatives and signatories If a blocked individual acts as a representative for a non-blocked company, compliance officers must intervene. A U.S. person cannot legally enter into a contract signed by a blocked individual, even if that individual's company is completely free of sanctioned ownership.

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3. How OFAC Calculates Ownership

Calculating whether an entity meets the 50 percent threshold requires precise mathematical aggregation and a clear understanding of corporate hierarchy. Organizations must trace both direct and indirect ownership, combining the stakes of multiple blocked persons across all sanctions programs.

Direct Ownership and Aggregation

When evaluating direct ownership, compliance teams must aggregate the stakes of all blocked persons. OFAC does not restrict this aggregation to a single sanctions program.

• Example: Blocked Person A (counter-narcotics program) owns 25% of Company X. Blocked Person B (cyber-security program) owns 25% of Company X.
• Result: Company X is blocked because aggregate ownership by blocked persons equals exactly 50%.

Indirect Ownership Through Subsidiaries

Indirect ownership calculations require analyzing the ownership chain from the top down. If a blocked person owns 50 percent or more of an intermediary company, that intermediary is blocked, and any downstream company in which it holds a 50 percent or greater stake is also automatically blocked.

Ownership Structure: [Blocked Person A] ──(50%)──> [Entity B (Blocked)] ──(50%)──> [Entity C (Blocked)]

Multiple Indirect Paths

Corporate structures often involve fragmented ownership spread across multiple holding companies. Compliance analysts must trace every path of ownership and aggregate them without double-counting.

• Blocked Person A owns 50% of Entity B (Entity B is blocked).
• Blocked Person A owns 50% of Entity C (Entity C is blocked).
• Entity B owns 25% of Entity D.
• Entity C owns 25% of Entity D.
• Result: Aggregate indirect ownership equals 50% (25% + 25%). Entity D is blocked.

Combining Direct and Indirect Stakes

Direct and indirect holdings by blocked persons are added together. Take Entity X, owned 30% by Blocked Person A and 30% by Entity Y, which Blocked Person B owns outright. Entity Y is itself blocked, so its full 30% stake counts. Blocked ownership of Entity X is 60%, and Entity X is blocked.

Do Not Multiply Percentages Down the Chain

A common modeling error is to pro-rate ownership through each layer: for example, treating a blocked person's 60% stake in a company that holds 50% of another as a 30% "indirect share". That is not how OFAC's guidance works. At each layer, the question is whether the holder is itself a blocked person, either listed or owned 50 percent or more by blocked persons. If it is, its whole stake counts toward the next entity. In the example, the 60%-owned company is blocked, so its full 50% stake makes the next entity blocked too, while the pro-rated method would wrongly clear it at 30%.

If an intermediate company is not blocked, its stake does not count toward the 50 percent threshold. OFAC still advises caution with entities in which blocked persons hold a significant minority interest or exercise control by other means, because such entities may be designated in the future.

Summary Matrix: Ownership Scenarios

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4. Divestment, Previously Blocked Property, and Sham Transactions

When an entity is blocked due to the 50 Percent Rule, sanctioned owners often attempt to sell or transfer their shares to fall below the 50 percent threshold.

1. Jurisdictional Requirement: Divestment must occur entirely outside of U.S. jurisdiction without U.S. person participation or facilitation.
2. Frozen Status Continuity: Property already frozen while a company met the 50 percent threshold does not automatically unfreeze if ownership later changes. It stays blocked until OFAC authorizes its release or removes the blocked person from the SDN List.

Sham transactions (OFAC advisory, March 31, 2026) OFAC's Guidance on Sham Transactions and Sanctions Evasion says that a transfer which only gives up property on paper does not end a blocked person's interest in it, because OFAC looks past legal form to the practical and economic reality. The red flags below follow that advisory.

Red Flags in Divestments

• Commercially Unreasonable Terms: Shares sold for pennies on the dollar or transferred without fair market value.
• Transfers to Insiders: Moving ownership to family members, close business associates, or junior employees.
• Opaque Structures: Utilizing newly formed trusts or shell companies in high-risk jurisdictions immediately following a designation.
• Suspicious Timing: Divestments that occur days before or immediately after a sanctions designation.
• Continuing Involvement: Former sanctioned owners remaining involved as "advisers" or continuing to receive economic benefits.

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5. Building a 50 Percent Rule Compliance Process

Name screening alone will not find an entity that is blocked only through its owners, because that entity's name is on no list. A workable process has five parts:

• 1. Ownership Data Collection: Collect legal names, direct/indirect owners, ultimate beneficial owners (UBOs), trust details, and recent ownership transfers before transacting. This applies to suppliers and carriers as much as customers: in our Fracht FWO breakdown, the charter carrier was a wholly owned subsidiary of a blocked airline.
• 2. Documented Methodology: Maintain a repeatable methodology for tracing corporate hierarchies and calculating aggregate stakes.
• 3. Enhanced Due Diligence (EDD) Triggers: Escalate entities where blocked ownership hovers just below the threshold (e.g., 48%), or where complex corporate structures lack clear commercial rationale.
• 4. Ongoing Monitoring: Continuously re-screen counterparties when ownership changes, management shifts, or OFAC updates list entries.
• 5. 10-Day Reporting: Secure blocked property and file required reports with OFAC within 10 business days pursuant to 31 C.F.R. § 501.603.

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6. Frequently Asked Questions

Does an entity have to appear on the SDN List to be blocked?

No. An entity can be blocked by operation of the 50 Percent Rule based on its ownership structure, even if its legal name is never published on the SDN List.

Does exactly 50 percent ownership trigger the rule?

Yes. The threshold is 50 percent or more. Exactly 50 percent ownership by blocked persons results in the entity being blocked.

Are ownership interests of multiple blocked persons added together?

Yes. If multiple blocked persons own shares in the same company, their interests are aggregated to determine if the 50 percent threshold is met, regardless of the underlying sanctions program.

Does control alone trigger the 50 Percent Rule?

No. The 50 Percent Rule is based on ownership, not control. However, entities controlled by blocked persons pose high risks of separate designation and prohibited dealings.

What happens if the blocked owner later sells shares?

If a blocked owner genuinely divests outside U.S. jurisdiction so aggregate blocked ownership falls below 50%, future transactions may no longer be automatically blocked. However, property that was already blocked stays blocked until OFAC authorizes its release or removes the blocked person from the SDN List.

When must blocked property be reported?

Under 31 C.F.R. § 501.603, reports of blocked property must be submitted to OFAC within 10 business days of the blocking action.