What is OFAC 50 Percent Rule?

Sanctions policy is a crucial tool that countries use to influence international relations, particularly in combating terrorism, human rights violations, and other threats. The primary body regulating sanctions in the USA is the Office of Foreign Assets Control (OFAC). One of the key aspects of OFAC’s work is the OFAC 50 Percent Rule — a regulation that automatically extends sanctions to entities owned by blocked persons, even if those entities are not named on any sanctions list. Understanding this rule is critical for any business operating internationally.

OFAC 50% Rule: Ownership Examples and SDN Status

The rule applies to both direct and indirect ownership, and ownership percentages from multiple blocked persons are aggregated. The table below illustrates how the rule works in practice:

Scenario	Ownership Structure	Aggregate % by Blocked Persons	Result
Simple direct ownership	Blocked Person X owns 60% of Company A	60% direct	⛔ Company A is BLOCKED
Exactly at threshold	Blocked Person X owns 50% of Company B	50% direct	⛔ Company B is BLOCKED
Multiple blocked owners	Blocked X owns 25% + Blocked Y owns 25% of Company C	50% aggregate	⛔ Company C is BLOCKED
Indirect chain	Blocked X owns 60% of A; A owns 60% of B	60% indirect (via A)	⛔ Company B is BLOCKED
Mixed direct + indirect	Blocked X owns 30% direct + 25% via A (A is 50%+ owned by X)	55% aggregate	⛔ Entity is BLOCKED
Below threshold	Blocked X owns 40% of Company D	40% — below 50%	✅ Company D is NOT automatically blocked
Sub-50% intermediary	Blocked X owns 40% of A; A owns 60% of B	X’s indirect stake in B: 24%	✅ Company B is NOT automatically blocked via this path

What Is the OFAC 50 Percent Rule?

The OFAC 50 Percent Rule is a regulation implemented by the U.S. Office of Foreign Assets Control that treats any entity as blocked — and therefore subject to the same US sanctions as listed SDNs — if one or more blocked persons own, in the aggregate, directly or indirectly, a 50% or greater interest in that entity. Critically, the entity does not need to appear on the SDN List to be subject to sanctions.

This means US persons are prohibited from conducting any transactions with such entities, and any assets of such entities within US jurisdiction must be frozen. The compliance burden falls entirely on businesses: OFAC does not publish a list of entities blocked solely under this rule.

SDN List vs. OFAC 50% Rule: Key Differences

Feature	SDN List (Direct Designation)	OFAC 50% Rule (Automatic Block)
Published by OFAC?	Yes — publicly listed on SDN List	No — not published; must be calculated
How entity becomes blocked	OFAC formally designates the entity	Automatic — once ownership threshold is met
Compliance responsibility	Screen against published list	Must conduct independent ownership analysis
Applies to subsidiaries?	Not automatically	Yes — if 50%+ owned by blocked persons
Updated by OFAC?	Yes — OFAC updates SDN List regularly	No — changes when ownership structure changes
Penalties for violation	Up to $1,000,000 or 2× transaction value	Up to $1,000,000 or 2× transaction value
Criminal liability?	Yes — up to 20 years imprisonment	Yes — up to 20 years imprisonment

Why Was the OFAC 50 Percent Rule Implemented?

The OFAC 50 Percent Rule was implemented to prevent sanctioned individuals and organizations from evading US sanctions by concealing their ownership through complex corporate structures. Without this rule, a Russian oligarch on the SDN List could simply create a new subsidiary — not listed on the SDN List — and conduct business freely.

In December 2022, OFAC significantly updated the rule to clarify that indirect ownership chains are fully covered: if a blocked person owns 50% or more of an intermediate company, and that company owns any stake in another entity, the blocked person’s proportional indirect ownership is counted toward the 50% threshold. This update closed a major loophole that allowed sanctions evasion through multi-layered corporate structures.

Penalties for Violating the OFAC 50% Rule

Violating the OFAC 50 Percent Rule — by transacting with an entity that is automatically blocked even without SDN listing — can result in severe civil and criminal penalties:

• Civil penalty: Up to $1,000,000 per violation, or twice the value of the transaction — whichever is greater
• Criminal penalty: Up to $1,000,000 fine and/or 20 years imprisonment for willful violations
• Asset freezing: Immediate blocking of all related assets within US jurisdiction
• Reputational damage: Public enforcement actions and loss of banking relationships

Importantly, OFAC applies strict liability for civil violations — meaning you can be penalized even if you had no intent to violate the rule. However, voluntary self-disclosure and strong compliance programs can significantly reduce penalties. If you need to assess your exposure, our OFAC compliance lawyers can review your counterparty relationships.

How to Comply with the OFAC 50 Percent Rule

Compliance with the OFAC 50% rule requires going beyond simple SDN list screening. Our OFAC lawyers recommend the following measures:

• Conduct deep ownership due diligence: Map the full beneficial ownership structure of counterparties — not just direct shareholders
• Aggregate ownership across multiple blocked persons: A 25% stake from two different SDN-listed parties equals 50% and triggers blocking
• Screen indirect ownership chains: Follow corporate structures multiple levels deep, especially in Russia, Iran, Venezuela, and Belarus
• Monitor ownership changes: An entity can become automatically blocked mid-relationship if a blocked person acquires a sufficient stake
• Use enhanced screening software: Standard SDN list screening tools do not automatically flag 50% rule entities — specialized tools or manual analysis required
• Train compliance staff: Ensure staff understand the rule applies even without SDN listing

Transactions with Sanctioned Entities: What Is Prohibited

Once an entity is blocked under the OFAC 50 Percent Rule, US persons are prohibited from:

• Processing any financial transactions involving the blocked entity
• Providing goods, services, or technology to the entity
• Entering into contracts or agreements with the entity
• Facilitating transactions by non-US persons that a US person would be prohibited from conducting directly

Assets of blocked entities within US jurisdiction must be frozen immediately. Failure to do so constitutes an independent OFAC violation. For guidance on OFAC blocked assets and how to handle them, see our dedicated legal resources.

Contact OFAC Sanctions Lawyers

If you’re facing issues related to OFAC sanctions or the 50 percent rule, don’t ignore them. Companies that fail to comply end up on the SDN list. Our sanctions lawyers have significant experience handling OFAC compliance matters and can assist with:

• Assessment of risks and ownership structure analysis for the 50% Rule
• Conducting due diligence on business partners and beneficial ownership chains
• Developing compliance programs tailored to OFAC regulations
• Voluntary Self-Disclosure (VSD) to minimize penalties
• Defense in OFAC enforcement actions