< Back to Glossary

What is the OFAC 50 Percent Rule?

Last updated: 26 October 2026

What is the 50 percent rule?

The 50 percent rule is a sanctions principle under which an entity is treated as sanctioned if one or more sanctioned parties own 50% or more of it, even if the entity is not itself on a sanctions list. It is best known as OFAC’s rule on “Entities Owned by Blocked Persons,” and it affects any organization subject to US jurisdiction. The UK and EU have their own versions, which differ in important ways.

The rule exists because sanctioned parties often hold assets through companies that are not named on any list. Without it, a listed person could avoid sanctions by placing assets in a subsidiary. Sanctions screening software helps institutions comply, since ownership has to be checked alongside names.

What is OFAC’s 50 percent rule?

The US Treasury’s OFAC treats any entity owned 50% or more, directly or indirectly and in the aggregate, by one or more blocked persons as blocked itself. Three points matter most:

  • Unlisted entities can be blocked. An entity is sanctioned because of who owns it, whether or not it appears on a list.
  • Ownership is aggregated. Stakes held by different blocked persons are added together, so two sanctioned owners with 25% each trigger the rule.
  • Indirect ownership counts. Ownership is traced through the chain, so a subsidiary of a blocked entity can also be blocked.

OFAC also urges caution with entities that fall just below the threshold or are controlled by blocked persons, since they may carry risk even if the rule does not apply automatically.

How does the 50 percent rule differ in the US, UK, EU and APAC?

Comparison United States (OFAC) United Kingdom European Union APAC
Test Ownership of 50% or more, in the aggregate Ownership of more than 50%, or control Ownership of more than 50%, or control Varies by country
Control alone Not enough by itself under the rule Can make an entity subject to sanctions Can make an entity subject to sanctions Varies
Aggregation Yes, across blocked owners Different approach to aggregation Different approach to aggregation Not applicable in most markets
Reach US persons, and non-US persons dealing with US nexus UK persons and UK jurisdiction EU persons and EU jurisdiction National laws, often guided by OFAC practice

In the UK and EU, control is harder to establish than ownership, and the two jurisdictions define it differently. A 50/50 joint venture with one sanctioned owner is not automatically sanctioned under the EU or UK ownership test, but it could be if the sanctioned party controls it. For the detail, read our full guide to the 50 percent rule.

In APAC, Australia and Singapore have no equivalent rule, and other Southeast Asian countries generally implement only UN listings. New Zealand has an autonomous framework, and its guide on Russian sanctions mentions the rule. Many APAC institutions follow OFAC practice when dealing with US frameworks, and otherwise apply their own beneficial ownership thresholds, usually 10 to 25%.

Quick examples of the 50 percent rule

Structure Result
A sanctioned person owns 25% of Company A and another sanctioned person owns 25%, so the two together own 50% Company A is blocked, because the stakes are aggregated
A sanctioned person owns 50% of Company A, and Company A owns 50% of Company B Both companies are blocked, because ownership carries down the chain

Real structures are rarely this simple. For five worked examples based on OFAC’s own FAQs, see the 50 percent rule guide.

How do institutions comply with the 50 percent rule?

  1. Identify beneficial owners. Collect ownership data as part of CDD and KYC, and identify the ultimate beneficial owners.
  2. Screen owners as well as customers. Check every owner, director and controller against sanctions lists through name screening.
  3. Trace the ownership chain through intermediate companies, and calculate aggregate and indirect ownership.
  4. Check control for the UK and EU, as well as ownership.
  5. Rescreen continuously. Lists and ownership change, so screening must be ongoing. See watchlist management.
  6. Document decisions so they can be explained to a regulator.

Compliance is not limited to banks. Even non-financial institutions must conduct sanctions screening, because the rule applies to any organization under OFAC jurisdiction.

How does the 50 percent rule relate to explicit and implicit sanctions?

Explicit sanctions name a party on a list. Implicit sanctions arise from association, such as ownership or control, and the 50 percent rule is a main example. Institutions that screen only for names will miss them. Sectoral sanctions add a third layer, restricting dealings in particular parts of an economy.

Why is the 50 percent rule hard to apply?

  • Ownership data is incomplete, outdated or held in different registries.
  • Structures can be layered across several jurisdictions. See shell companies.
  • The US, UK and EU apply different tests.
  • Aggregation and indirect ownership require calculation across the chain.
  • Customers and counterparties change ownership over time.

Staying ahead of the 50 percent rule with SymphonyAI

Entity resolution is the key capability. It links disconnected data, finds duplicates and hidden relationships, and maps ownership so that indirect sanctions exposure becomes visible. See our entity resolution page.

SymphonyAI’s sanctions screening page describes real-time, configurable name and transaction screening that prioritizes high-risk alerts using intelligent matching and AI analytics. SRI Augment for Screening (formerly SensaAI for Sanctions) adds generative and predictive AI to existing screening to improve matching and reduce false positives.

FAQs

What is the OFAC 50 percent rule?
It treats any entity owned 50% or more, directly or indirectly and in the aggregate, by one or more blocked persons as blocked itself, even if it is not named on a sanctions list.

Does the 50 percent rule apply in the UK and EU?
Yes, though with differences. The UK and EU rules apply where a listed person owns more than 50% or controls the entity.

Are ownership stakes added together?
Under the OFAC rule, yes. Stakes held by different blocked persons are aggregated, so two owners with 25% each trigger it.

Does indirect ownership count?
Yes. Ownership is traced through the chain, so a subsidiary of a blocked entity can also be blocked.

Does the 50 percent rule apply to non-US companies?
It can. A non-US entity that deals with a blocked entity or with US persons, systems or currency can face exposure under OFAC rules.

Where can I find worked examples and penalties?
See our 50 percent rule guide for five worked examples, the main sanctions lists and the penalties for breaches.