A technology group headquartered in the United States identifies a joint-venture partner in a third market. The partner's principal shareholder has apparent ties to a blocked person. Legal counsel flags the position. The deal team asks a question that decides the entire transaction: does the joint venture itself fall within OFAC's prohibitions, and, if so, on what basis? Getting that analysis wrong – in either direction – carries consequences that run well beyond the immediate deal.
Joint-venture sanctions structuring under OFAC requires a systematic assessment of three overlapping tests: ownership, control, and programme-specific prohibitions. Under the 50 percent rule (OFAC's rule treating entities owned 50 percent or more in the aggregate by blocked persons as themselves blocked), a joint venture with sufficient blocked-person ownership is itself treated as blocked regardless of its registration, operations, or the intentions of its other co-venturers. Where ownership sits below that threshold, the analysis turns on control and on the specific programme in play.
As of January 2026, OFAC administers more than thirty active sanctions programmes under instruments including IEEPA and TWEA. This briefing explains the governing authority, the ownership and control tests, programme-specific overlays, the cross-regime dimension, common risk points, and when cross-border businesses should bring in specialist counsel.
Who administers OFAC sanctions and what legal instruments apply?
OFAC – the Office of Foreign Assets Control, a bureau of the US Department of the Treasury – administers US economic and trade sanctions under authority drawn from IEEPA, TWEA, and enabling legislation for specific country-based and thematic programmes. The SDN List (OFAC's list of Specially Designated Nationals and blocked persons) is the primary designation instrument. A blocked person's assets are frozen and US persons are prohibited from dealing with them.
For joint-venture structures, the legal basis matters beyond the label. Different programmes impose different prohibitions. Some create sector-specific restrictions that apply even where no SDN designation is in place. Others carry secondary-sanctions risk – the possibility that non-US persons transacting with a designated party may themselves become exposed to OFAC action, regardless of whether a US nexus is directly present. A joint venture that has no US participants can still fall within OFAC's reach if its activities touch the United States financial system or if secondary-sanctions provisions apply.
The position above covers the standard question. Your specific joint venture – its ownership, its operations, its industry, and the programme in play – will change the analysis materially. For a structured review, contact Calder & Vance at info@caldervance.com.
How does the 50 percent rule apply to joint-venture ownership structures?
The 50 percent rule is OFAC's rule that any entity owned 50 percent or more in the aggregate by one or more blocked persons is itself treated as blocked, whether or not it appears on the SDN List. The rule applies to the joint venture entity directly. It does not require a separate designation.
Aggregation is the point where structuring decisions become most consequential. Two blocked persons each holding twenty-six percent of a joint venture collectively reach the threshold. Neither trip the rule independently; together they do. The test examines the aggregate percentage held by all blocked persons across direct and indirect holding chains. A one-layer ownership review is insufficient. Where a co-venturer is itself an entity, the chain must be traced upward to identify whether any blocked person ultimately holds a determinative share.
Indirect holdings add a further layer of complexity. A blocked person owning fifty percent or more of an intermediate holding company means that the intermediate company is itself blocked. That blocked intermediate's share of the joint venture is then attributed to a blocked person for purposes of the aggregation calculation, even if the blocked individual holds no direct stake in the venture. In our experience, this two-step attribution is the most common gap in pre-transaction diligence reviews – particularly where holding structures span multiple jurisdictions.
One structural question that frequently arises is whether a co-venturer can dilute a blocked-person holding below the threshold through the transaction itself. OFAC's approach treats the moment of engagement as the relevant point for assessing the prohibition. A US person may not enter arrangements that result in blocked-person ownership reaching or exceeding the threshold, nor provide services to a joint venture already captured by the rule. The structuring work must therefore precede commitment, not follow it.
What does OFAC prohibit in relation to joint-venture activity?
OFAC's prohibitions in the joint-venture context operate at multiple levels: the prohibition on dealing with a blocked entity, the prohibition on facilitating transactions by US persons that a non-US person could not itself conduct, and programme-specific sector prohibitions that catch certain activities regardless of SDN status.
Where the joint venture entity is itself blocked – by reason of the 50 percent rule or a direct designation – the following categories of activity are prohibited for US persons: entering into the joint-venture agreement, contributing capital or assets, receiving distributions, providing services including management or advisory services, processing payments, and maintaining any financial relationship. Each of these is a separate and independent prohibition. A US minority shareholder in a captured joint venture cannot simply decline active management and continue to hold its interest.
The prohibition on facilitation extends the reach further. A US person may not take action that facilitates a transaction by a non-US person that the US person could not itself conduct. In joint-venture structures, this catches US-person board members approving transactions on behalf of the venture, US-person counsel providing transactional services, and US-domiciled banks processing payments flowing through the structure. The facilitation prohibition does not require the US person to be a party to the underlying transaction.
Sector-based restrictions under certain programmes add another category of prohibitions that apply without a designation. These sector rules restrict transactions in defined industries – energy, defence, financial services, and others, depending on the programme – and they can apply to joint ventures whose operations fall within the covered sector even where no participant is on the SDN List. Identifying whether a programme-specific sector restriction is in play is therefore part of the initial scoping exercise, not a secondary question.
Does the control test add exposure beyond the ownership threshold?
OFAC's primary test for attribution in the entity context is the ownership-based 50 percent rule. However, OFAC guidance and enforcement practice make clear that, even where formal ownership sits below the threshold, other indicators of control may be relevant to whether a transaction is permissible.
Where the ownership position is borderline or where the ownership chain is partially opaque, OFAC may examine whether a blocked person exercises effective control over the entity's operations, whether board composition gives a blocked person decisive influence, and whether contractual arrangements replicate the economic effect of ownership. These are not codified bright-line rules in the same way the ownership threshold is. They are factors that inform OFAC's enforcement and licensing judgments. A joint venture in which a blocked person holds forty-eight percent but retains veto rights over major decisions presents a different risk profile than one in which the same person holds forty-eight percent without governance rights.
In our cross-border practice, we consistently advise that the control analysis should accompany the ownership analysis even where the numerical threshold is not reached. This is particularly important in joint ventures structured under civil-law regimes where minority shareholder protections routinely include veto rights, approval rights over specified transactions, and rights to appoint key management. These protections may be commercially standard. Under OFAC's analytical approach, they are also relevant facts.
How does OFAC joint-venture analysis compare with the OFSI and EU positions?
The cross-regime dimension of joint-venture sanctions structuring is unavoidable for any business operating across the major jurisdictions. The US, UK, and EU frameworks share a common objective but diverge in material respects that directly affect structuring decisions.
OFAC applies the mechanical 50 percent ownership threshold. A company is blocked if the arithmetic is met; there is no further assessment of whether the blocked person actually directs the entity's activity. OFSI (the UK Office of Financial Sanctions Implementation) and the equivalent EU instruments apply an ownership and control test (the UK and EU test for whether a non-listed entity is caught through a listed person). Control under both UK and EU rules can be established through ownership or through other means – contractual rights, board influence, or economic dependency – and the threshold is not defined solely by a numerical percentage. A joint venture that sits outside the OFAC 50 percent rule may still be caught under OFSI or EU standards.
The divergence creates a practical structuring problem. A joint venture cleared under the US ownership test may still require a licence or restructuring to operate freely in the EU or the UK. Where the venture has EU-nexus operations or UK financial-system exposure – bank accounts, EU-established counterparties, payments routed through the UK – the OFSI and EU analyses cannot be skipped on the basis that OFAC is satisfied. The stricter prohibition governs in practice: a transaction blocked under any one regime is effectively blocked, whatever the others permit.
For businesses with operations in Singapore, the UAE, or Japan, additional national sanctions regimes may apply their own ownership and attribution tests. Singapore's applicable legislation, Japan's Foreign Exchange and Foreign Trade Act instruments, and the UAE's Cabinet decisions each establish independent prohibitions. In a joint venture with participants or operations spanning these jurisdictions, a multi-regime clearance analysis is not optional.
For detailed analysis of the UK position, see our briefing on joint-venture sanctions structuring under OFSI and the companion piece on OFSI obligations in depth. Financial institutions with cross-border transaction exposure should also review our guidance on correspondent banking and de-risking under OFAC.
If a transaction has already been flagged under any of these regimes, or if a filing or payment has been declined, an early review can preserve options that become harder to exercise with the passage of time. Contact us at info@caldervance.com.
What are the common risk points in joint-venture structuring?
Six risk points recur with particular frequency in joint-venture sanctions reviews. Each represents a point where a gap in the initial analysis has led to a compliance failure or a blocked transaction in subsequent enforcement or regulatory review.
Incomplete ownership tracing. The most common deficiency is a review that stops at the first layer of a co-venturer's ownership structure. Blocked-person interests are frequently held through intermediate vehicles. An ownership review that examines only direct shareholders leaves the second and third layers unanalysed.
Aggregation across related blocked persons. Where multiple parties connected to the same blocked person hold separate interests, those interests must be aggregated. Structuring that deliberately separates holdings to stay below the threshold raises serious compliance and ethical concerns; identifying inadvertent aggregation before the deal closes is a different matter and is necessary due diligence.
Sector-based prohibitions overlooked. In deals in energy, defence, infrastructure, and financial services, sector-specific programme restrictions can apply even where no SDN is in the ownership chain. The sector classification of the venture's primary activity requires explicit analysis.
Post-closing designation risk. A joint venture that is clean at closing may become captured if a co-venturer is designated after the agreement is executed. Without a sanctions-event clause and a mechanism for swift response – which may include divestiture, a licence application, or winding up the relevant activity – a US-person co-venturer can find itself in an ongoing prohibited relationship through no action of its own.
Service-provider exposure. Banks, auditors, insurers, and legal counsel servicing a captured joint venture are themselves subject to the prohibitions. A US-person law firm that continues to advise a joint venture entity after it becomes blocked provides a prohibited service. Identifying the point at which the capture occurred matters for every service provider in the chain.
Secondary-sanctions exposure for non-US co-venturers. Under certain programmes, non-US parties who deal with SDN-listed persons or entities can themselves become subject to OFAC action. A non-US co-venturer that dismisses the OFAC analysis on the basis that it is not a US person may still face secondary-sanctions consequences, particularly where the venture's activities touch a programme with extraterritorial secondary-sanctions provisions.
How is joint-venture sanctions structuring enforced under OFAC, and what is the role of voluntary self-disclosure?
OFAC enforces through civil monetary penalties and, in coordination with the Department of Justice, through criminal referrals for wilful violations. Civil penalty bases are set by statute and adjusted periodically; the specific current figures should be verified against OFAC's published penalty schedule before reliance. Enforcement actions may be resolved through settlement, which OFAC publishes, and which serve as the primary source of public enforcement guidance on novel structural questions.
The enforcement posture on joint-venture structures specifically reflects the complexity of multi-party arrangements. OFAC's published guidance addresses the 50 percent rule and the facilitation prohibition. Enforcement settlements in the joint-venture space have addressed situations where US-person co-venturers continued to receive distributions from a captured entity, where US-person officers processed payments on behalf of a partly-blocked structure, and where post-closing designations were not acted upon promptly.
A VSD (voluntary self-disclosure to a regulator) is available where a potential violation is identified before OFAC takes enforcement action. OFAC's penalty guidelines treat a timely VSD as a mitigating factor, and a well-prepared VSD can materially affect the outcome of an enforcement proceeding. We regularly advise businesses on whether a VSD is appropriate, how to scope it, and how to structure the disclosure to present the full picture accurately without inadvertently extending the potential liability scope.
The specific licence route (a case-by-case authorisation to conduct an otherwise prohibited transaction) is available in principle for transactions involving blocked parties where US policy objectives support authorisation. A specific licence application for a joint-venture structure requires a detailed factual submission setting out the parties, the structure, the activity, and the policy basis for the requested authorisation. Timelines for specific-licence review are not guaranteed, and the submission must be prepared to withstand detailed regulatory scrutiny. General licences (standing authorisations that permit defined categories of transactions without a separate application) may also be relevant depending on the programme; their scope must be read carefully against the specific structure before reliance.
A common misconception about the reach of OFAC's rules
A recurring misconception among deal teams approaching a joint venture with a borderline ownership position is that the 50 percent rule operates as a safe harbour: if the aggregate blocked-person holding is forty-nine percent, the analysis ends. It does not. The ownership threshold determines whether an entity is automatically blocked. It does not determine whether a transaction is otherwise permissible under the applicable programme.
A joint venture with forty-nine percent blocked-person ownership may still be subject to sector-based restrictions under a country programme. It may still trigger facilitation concerns if US-person participants support transactions that the blocked co-venturer could not itself conduct. It may be caught under OFSI or EU standards even while falling outside OFAC's ownership threshold. And the governance arrangements that accompany minority stakes – veto rights, distribution rights, information rights – each require independent review.
The better question is not "does the aggregate holding reach fifty percent?" but "under each relevant programme and each relevant regime, what is actually permitted, and what conditions or structural protections need to be in place?" In our experience, joint ventures structured on the threshold question alone regularly require remedial work after closing.
Related practices
- Correspondent banking and de-risking under OFAC – screening exposure and programme management for financial institutions operating cross-border
- Joint-venture sanctions structuring under OFSI – UK ownership and control tests, OFSI licensing, and enforcement posture for cross-border ventures