50 Percent Rule
OFAC’s 50 Percent Rule states that any entity owned, directly or indirectly, 50% or more in the aggregate by one or more blocked persons is itself considered blocked, automatically, by operation of law, regardless of whether that entity ever appears by name on the SDN List. The rule changed substantially in 2014, and the 2014 version, the one actually in force today, is routinely described inaccurately even in professional compliance content.
Key takeaways
- The 50 Percent Rule automatically blocks any entity owned 50%+ in the aggregate by one or more blocked persons, with no separate OFAC designation required.
- OFAC’s 2014 revision (79 FR 47726) reversed its earlier position: ownership stakes of multiple blocked persons are now aggregated, not assessed individually.
- OFAC’s own example: two blocked persons each owning 25% of the same entity together trigger the rule, even though neither crosses 50% alone.
- Aggregation applies across different, unrelated sanctions programmes, and “indirect” ownership traces through multiple layers of holding companies.
- Entities below the 50% threshold aren’t automatically safe; OFAC explicitly flags them as potential future designation targets.
- No published OFAC list ever shows entities blocked purely through this rule; the exposure only surfaces through independent beneficial ownership analysis.
- The same strict-liability standard that applies to named SDNs applies to entities blocked automatically under this rule.
On this page
What the 50 Percent Rule actually saysThe 2014 reversal that changed everythingA worked example straight from OFAC’s own FAQWhat “indirect” ownership actually meansAggregation applies across different sanctions programmes tooWhat happens below 50%: the danger zoneThe separate route: blocking without designationThe rule extends beyond the SDN ListWhy no published list can ever show you thisPractical due diligence: what actually has to happenReal consequences of getting this wrongBuilding a 50 Percent Rule check into KYCFAQsRead more
13 Aug 2014
Date OFAC published its revised 50 Percent Rule guidance, reversing its earlier position
Source: OFAC, 79 Fed. Reg. 47726
50%+
Aggregate ownership threshold at which an entity is automatically blocked, regardless of individual designation
Source: OFAC 50 Percent Rule
What the 50 Percent Rule actually says
OFAC’s 50 Percent Rule holds that the property and interests in property of any entity owned, directly or indirectly, 50% or more in the aggregate by one or more blocked persons are themselves considered blocked, regardless of whether that entity appears on OFAC’s Specially Designated Nationals and Blocked Persons List, or any other OFAC list, by name. Blocking under this rule happens automatically, by operation of law, the moment the ownership threshold is crossed. No separate OFAC action, no additional designation notice, no publication, is required for the rule to take legal effect.
That last point is the one most compliance content gets wrong or leaves out entirely: this isn’t a rule that tells you to check a list. It’s a rule that creates legally blocked status for entities that will never appear on any list at all.
The 2014 reversal that changed everything
The version of the 50 Percent Rule in force today isn’t the original one. OFAC first issued guidance on this subject on 14 February 2008. On 13 August 2014, OFAC published revised guidance, in the Federal Register at 79 FR 47726, that reversed a key part of its earlier position. Under the pre-2014 informal understanding, an entity was only considered blocked if a single blocked person, alone, owned 50% or more of it. Under the 2014 revision, OFAC now aggregates the ownership stakes of multiple blocked persons together, meaning several blocked individuals or entities, none of whom individually crosses 50%, can collectively trigger the rule.
This wasn’t a minor clarification. It was a deliberate reversal that meaningfully expanded which entities are automatically blocked, and it means any compliance guidance written before August 2014, or any content that doesn’t reflect the aggregation standard, describes a rule that is no longer OFAC’s actual position.
A worked example straight from OFAC’s own FAQ
OFAC’s own FAQ 399 sets out the aggregation logic with a direct, numerical example: if Blocked Person X owns 25% of Entity A, and Blocked Person Y separately owns another 25% of Entity A, Entity A is itself considered blocked, because it’s owned 50% or more in the aggregate by one or more blocked persons, even though neither X nor Y individually crosses the 50% threshold alone. Two blocked minority stakes, added together, produce one fully blocked entity.
This is precisely the scenario that makes the rule operationally dangerous for firms relying on name-only screening. Entity A itself was never designated. Neither X’s 25% stake nor Y’s 25% stake, viewed in isolation, would have triggered anything on their own. Only the combination does, and nothing about checking Entity A’s own name against the SDN List would ever reveal that.
What “indirect” ownership actually means
OFAC’s FAQ 401 addresses a further layer of complexity directly: indirect ownership, for purposes of the 50 Percent Rule, means a blocked person’s ownership of shares in an entity through another entity or entities that are themselves 50% or more owned in the aggregate by that blocked person. In other words, the rule doesn’t stop at one layer of corporate structure. If Blocked Person X owns 100% of Holding Company B, and Holding Company B owns 60% of Entity C, then Entity C is indirectly, and therefore automatically, blocked too, purely by virtue of the ownership chain running back to X.
OFAC’s own guidance explicitly urges firms to conduct appropriate due diligence specifically to determine relevant ownership stakes in any entity involved in a transaction or account relationship, precisely because this chain-tracing exercise is not something a name-matching screening tool performs on its own.
Aggregation applies across different sanctions programmes too
A detail that’s easy to miss even in otherwise careful compliance content: OFAC’s FAQ 399 specifies that for purposes of calculating aggregate ownership, the ownership interests of persons blocked under different OFAC sanctions programmes are aggregated together, not just persons blocked under the same programme. A person blocked under a Russia-related sanctions programme and a person blocked under a completely separate counter-narcotics programme can, together, trigger the 50 Percent Rule against a jointly owned entity, even though the two blocked persons have no connection to each other beyond both appearing somewhere on OFAC’s blocked-persons universe.
What happens below 50%: the danger zone
Entities owned by blocked persons at levels below the 50% aggregate threshold are not automatically blocked under this rule. But OFAC’s own guidance is explicit that such entities “may be the subject of future designation or enforcement action,” a deliberately open-ended warning rather than a safe harbour. A minority stake held by a blocked person, particularly where that person also appears to exercise practical control disproportionate to their formal ownership percentage, is a documented risk factor OFAC has flagged directly, not a cleared category simply because the arithmetic falls short of 50%.
The separate route: blocking without designation
The 50 Percent Rule isn’t the only mechanism that can make an entity blocked without an individual OFAC designation. Certain sanctions programmes, covering Crimea, Cuba, Iran, North Korea, Syria, and Venezuela among them, block certain persons and entities based on separate criteria entirely, such as meeting the definition of a “blocked government,” independent of the 50 Percent Rule’s ownership-based logic altogether. A firm relying exclusively on ownership-percentage analysis for these specific programmes can still miss blocked status that arises from a completely different legal basis.
The rule extends beyond the SDN List
The 50 Percent Rule doesn’t apply only to entities connected to the SDN List. Since July 2014, in the context of Ukraine and Russia-related sanctions, OFAC has also applied a version of the 50 percent rule to entities connected to the Sectoral Sanctions Identifications List, the SSI List, a separate OFAC list covering more limited, sector-specific restrictions rather than a full asset block. This means aggregate ownership analysis is relevant to more than one category of OFAC restriction, not a single-list concern.
Why no published list can ever show you this
This is the structural point that matters most for anyone building a screening programme: OFAC does not publish a list of entities that are blocked purely by operation of the 50 Percent Rule. There is no downloadable file, no searchable database, no consolidated register of “entities blocked via aggregate ownership.” This derived population exists legally, with full force, whether or not it’s ever documented anywhere OFAC publishes. Identifying it requires a firm to actually perform the ownership analysis itself, entity by entity, rather than checking a name against any published source, however comprehensive that source might otherwise be.
Practical due diligence: what actually has to happen
Meeting this obligation in practice means going beyond a direct-name sanctions check for any counterparty with meaningful corporate ownership behind it: identifying the entity’s beneficial owners, the same exercise required under standard CDD and beneficial ownership analysis, and then separately screening each identified owner against sanctions lists, tracing ownership through intermediate holding structures where they exist, and aggregating any blocked-person stakes identified to check whether the combined total crosses 50%. This is functionally the same tracing exercise used to identify a beneficial owner, applied specifically to test for sanctions exposure rather than general ownership transparency, and it’s why the two disciplines increasingly run through the same underlying workflow inside a compliance programme.
Real consequences of getting this wrong
Because 50 Percent Rule blocking is automatic and doesn’t depend on OFAC ever naming the entity, a firm that transacts with an aggregate-owned blocked entity faces the same strict-liability exposure as if it had transacted with a named SDN directly. OFAC’s strict liability standard for sanctions violations doesn’t distinguish between “we transacted with a named SDN” and “we transacted with an entity that was legally blocked but never individually listed.” The legal consequence is identical; only the difficulty of detecting the exposure differs, and that difficulty doesn’t reduce liability.
Building a 50 Percent Rule check into KYC
A screening programme that actually accounts for this rule builds ownership-chain analysis into onboarding and periodic review as a distinct step, not an assumed byproduct of name screening: capture beneficial ownership data to a sufficient depth to trace indirect stakes, screen every identified owner independently rather than only the entity’s own name, aggregate blocked-person ownership across every identified owner and across every sanctions programme rather than checking one stake or one programme in isolation, and document the analysis and its conclusion for every meaningful corporate counterparty, since “we checked the entity’s name and it wasn’t listed” is not, on its own, a defensible 50 Percent Rule compliance position.
Trace ownership for hidden sanctions exposure
Identify and screen beneficial owners to catch aggregate blocking exposure a name check alone would miss.
Frequently asked questions
What is OFAC’s 50 Percent Rule?
It states that any entity owned, directly or indirectly, 50% or more in the aggregate by one or more blocked persons is itself automatically blocked, whether or not that entity is ever individually named on the SDN List.
When did the 50 Percent Rule get its current form?
OFAC issued original guidance on 14 February 2008 and revised it substantially on 13 August 2014 (79 FR 47726), reversing its earlier position to require aggregation of ownership stakes across multiple blocked persons.
What changed in the 2014 revision specifically?
Before 2014, only a single blocked person owning 50% or more, alone, triggered the rule. After 2014, OFAC aggregates the stakes of multiple blocked persons together, so several minority blocked stakes can combine to trigger automatic blocking.
Does aggregation apply across different sanctions programmes?
Yes. OFAC’s FAQ 399 confirms that ownership interests of persons blocked under different OFAC sanctions programmes are aggregated together when calculating whether the 50% threshold is met.
What does “indirect” ownership mean under the 50 Percent Rule?
It covers ownership through another entity or entities that are themselves 50% or more owned in the aggregate by a blocked person, meaning the rule applies through multiple layers of corporate structure, not just direct shareholding.
Is an entity safe if blocked persons own less than 50% of it?
Not automatically safe. OFAC’s guidance explicitly warns such entities may be the subject of future designation or enforcement action, particularly where a minority owner also exercises disproportionate control.
Does OFAC publish a list of entities blocked under the 50 Percent Rule?
No. There is no published list of entities blocked purely through aggregate ownership. Firms have to identify this exposure themselves through beneficial ownership analysis; it cannot be found by checking a name against any published OFAC list.
Does the 50 Percent Rule apply beyond the SDN List?
Yes. Since July 2014, OFAC has also applied a version of the rule to entities connected to the Sectoral Sanctions Identifications (SSI) List in the Russia/Ukraine sanctions context.
What is the liability if a firm unknowingly deals with an entity blocked under this rule?
The same strict-liability exposure as dealing with a named SDN directly. OFAC’s strict liability standard doesn’t distinguish between a named SDN and an entity blocked automatically through aggregate ownership; the difficulty of detection doesn’t reduce liability.
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Last reviewed July 19, 2026 · 12 min read · Written for compliance and risk professionals · By the WhoWiki editorial team
Key takeaway: OFAC’s 50 Percent Rule states that any entity owned, directly or indirectly, 50% or more in the aggregate by one or more blocked persons is itself considered blocked, automatically, by operation of law, regardless of whether that entity ever appears by name on the SDN List. The rule changed substantially in 2014, and the 2014 version, the one actually in force today, is routinely described inaccurately even in professional compliance content.