What is the OFAC 50 percent rule?

The full answer

The OFAC 50 percent rule states that any entity owned 50% or more by persons on OFAC's Specially Designated Nationals (SDN) list is itself blocked by operation of law. The entity doesn't need to appear on any published list. OFAC codified this standard in August 2014 guidance titled "Entities Owned by Persons Whose Property and Interests in Property Are Blocked," available through OFAC's FAQs and guidance page.

Two mechanics define how the rule applies in practice.

Aggregation. If SDN-listed person A owns 30% and SDN-listed person B owns 25% of the same entity, that entity is blocked: their interests combine to 55%, crossing the threshold. The 50% test applies to the combined holdings of all designated persons, not to each person separately. Ownership structures that split stakes at 24% and 24% across two designated persons still trigger the rule if a third designated person holds 3% or more.

Indirect ownership. A blocked person owning 51% of Company A, which owns 60% of Company B, means Company B is blocked too. There's no safe harbor from being several corporate layers removed from the designated person. You have to trace the chain.

OFAC's published FAQs confirm both mechanics. Entities caught by the 50 percent rule don't need a separate OFAC designation; they're blocked by statute, automatically.

One boundary worth knowing: if a designated person owns exactly 49%, the 50 percent rule doesn't directly apply. But that doesn't mean the entity is clean. True ownership may exceed 49% once nominee arrangements and layered structures are unwound. And other legal provisions may independently restrict dealing with that entity depending on the sanctions program.

Why this matters

No list tells compliance teams which entities are caught by this rule. The SDN list names explicitly designated persons and entities. Entities blocked only under the 50 percent rule are unlisted. A program that screens only against the SDN list can be technically compliant on its face while processing payments for blocked entities.

We've seen banks pay for exactly this gap. In April 2019, UniCredit agreed to pay approximately $611 million to resolve OFAC liability for violations that included failures to identify blocked-person beneficial ownership in complex corporate structures. That settlement made the regulatory expectation explicit: look through the layers.

For compliance teams, the rule creates several concrete operational requirements.

Understanding what a beneficial owner is is the starting point. FinCEN's Customer Due Diligence rule requires beneficial ownership identification at the 25% ownership threshold for legal entity customers. The OFAC 50 percent rule applies a different threshold, but the underlying data requirement is the same: you need to know who actually owns and controls the counterparty, including through indirect and layered structures.

Sanctions screening works through name matching against published lists. It doesn't surface unlisted entities caught by the 50 percent rule. That's a separate analytical step: mapping the ownership structure of each counterparty against SDN-listed persons and verifying that no combination of designated ownership reaches 50%.

The difference between CDD and EDD is directly relevant. Standard CDD captures beneficial ownership above 25%, but EDD for higher-risk customers should trace indirect ownership chains and aggregate across related designated parties. For a counterparty with a complex holding structure in a high-opacity jurisdiction, tracing ownership through three corporate layers isn't excessive due diligence. It's what the rule requires.

Customer risk ratings need periodic refresh. A counterparty that was clean at onboarding becomes blocked the day a designated person acquires a controlling stake. Static KYC at account opening doesn't catch that change.

Sanctions program deficiencies are one of the triggers that bring examiners in. What triggers a regulatory exam covers this in detail. If the exam goes badly, the consequences are serious, ranging from formal corrective action through to consent orders. In the most serious cases, a monitorship is imposed: an independent monitor placed inside the bank at the bank's expense, sometimes for years.

Counterparties in jurisdictions on the FATF Grey List warrant closer scrutiny of ownership structures. Those jurisdictions are grey-listed because their transparency and AML controls are deficient, which makes beneficial ownership opacity more common and harder to resolve through standard registry searches.

The FATF guidance on beneficial ownership transparency makes a consistent point across its publications: corporate ownership opacity is the primary mechanism through which sanctioned persons maintain access to the financial system. Closing that gap requires more than checking a name against a list. It requires knowing who actually owns the entity on the other side of every transaction.

Related questions

• What is a beneficial owner?
• How does sanctions screening work?
• What is the difference between CDD and EDD?
• How often should customer risk ratings be refreshed?
• What is the FATF Grey List?

Related concepts and regulations

• OFAC FAQs on Sanctions Compliance (U.S. Treasury / OFAC)
• OFAC Civil Penalties and Enforcement Information (U.S. Treasury / OFAC)
• FATF Guidance on Beneficial Ownership Transparency (FATF-GAFI)
• FinCEN Customer Due Diligence Requirements for Financial Institutions (FinCEN)