For the first time, OFAC and OFSI have jointly published a side-by-side comparison of their sanctions regimes. If your institution operates under both US and UK sanctions obligations, this document is not background reading. It is a compliance specification, and it makes one thing clear: the two regimes are not interchangeable, and treating them as such is a documented gap.
On 23 June 2026, the US Department of the Treasury's Office of Foreign Assets Control (OFAC) and HM Treasury's Office of Financial Sanctions Implementation (OFSI) released a joint publication titled The U.S. and UK Economic Sanctions Authorities: A Comparative Overview. The guidance follows their January 2026 in-person exchange in London and represents the most direct signal yet that regulators on both sides of the Atlantic expect compliance teams to understand and operationalize the differences between the two regimes, not just screen against both lists.
The timing is deliberate. As OFSI Director Giles Thomson and OFAC Director Bradley Smith noted in the accompanying blog post, the two agencies are working together on everything from new pressure mechanisms to the structured dismantling of regimes like Syria. Sanctions are moving faster than ever. A compliance program built on assumptions rather than documented framework distinctions is a liability.
"Those who are required to comply with our sanctions [should have] a clear and strong understanding of how to do so."
OFAC and OFSI, Joint Comparative Overview, June 2026
The Key Differences: A Compliance Practitioner's Summary
The guidance spans six sections covering organization basics, sanctions types, recordkeeping and reporting, guidance, licensing, and enforcement. The distinctions most likely to create gaps in existing compliance controls are summarized below.
Terminology and List Structure
OFAC designates Specially Designated Nationals (SDNs) whose property is blocked. OFSI designates Designated Persons (DPs) whose assets are frozen. These are not cosmetic differences. The underlying legal obligations, and the operational triggers in your screening workflow, differ accordingly. OFAC maintains multiple lists consolidated into a Sanctions List Service. The UK Sanctions List, transferred to FCDO management as of January 28, 2026, is a single list with its own search tool. Your screening platform needs to be current on both, independently.
| Topic | OFAC (US) | OFSI (UK) |
|---|---|---|
| Term for sanctioned person | SDN / Blocked Person | Designated Person (DP) |
| Action on assets | Block (prohibit and report) | Freeze (prohibit and report) |
| Rejected transactions | Must report to OFAC within 10 business days | No equivalent reporting requirement |
| Annual filing deadline | Sept 30 (as of June 30) | Nov 30 (as of Sept 30) |
| Recordkeeping period | 10 years (codified) | Per other UK financial rules |
| Ownership rule | 50% aggregate (individuals or combined) | 50% per individual DP only |
| Control included? | No (ownership only) | Yes (control extends coverage) |
| Jurisdiction-based sanctions | Yes (country-level prohibitions) | No broad jurisdiction-based sanctions |
| Strict liability standard | Yes (longstanding) | Yes (for breaches after June 15, 2022) |
| Voluntary disclosure reduction | Up to 50% penalty reduction | Up to 30% penalty reduction |
| Statute of limitations | 10 years | None |
The Ownership and Control Divergence
This is where operational risk is highest for firms screening corporate counterparties, and where the two regimes diverge most significantly in practical application.
OFAC's 50 Percent Rule treats aggregate ownership across multiple blocked persons as sufficient to implicate an entity. Two SDNs each holding 26% means the entity is blocked, even if neither individually crosses the threshold. Under OFSI's framework, that same structure may not trigger a freeze unless one DP individually holds more than 50%, or control can otherwise be demonstrated through board appointment rights or similar mechanisms.
Running the same beneficial ownership logic against both regimes and expecting identical results is a compliance gap. It requires distinct rules, distinct data lookups, and a human compliance officer who understands what they are reviewing and why. The joint guidance makes this explicit. Compliance teams should treat it accordingly.
Reporting Obligations Are Not Symmetric
Under OFAC, a rejected prohibited transaction must be reported within 10 business days. OFSI has no equivalent requirement. Conversely, OFSI imposes specific reporting obligations on relevant firms and relevant institutions that go beyond what OFAC requires of comparable entities. A financial institution operating in both jurisdictions cannot apply a single reporting workflow to both. The obligations are different in kind, not just degree.
What Regulators Are Signaling About the Future
The companion blog post from the OFAC and OFSI Directors is as important as the guidance document itself. Three themes point clearly to where regulatory attention is heading.
AI and emerging technology are being embedded into sanctions administration.
Both agencies are actively evaluating how to use AI and emerging technology to assess the impact of sanctions, process license applications, and support decision-making. They are building better tools for themselves. Compliance teams should be building better tools too, because the bar for adequate controls will rise accordingly. A manual, spreadsheet-driven compliance process is not designed to keep pace with a regulator that is automating its own operations.
New typologies are coming for shipping, counternarcotics, and illegal migration.
The shadow fleet, counternarcotics, and illegal migration are explicitly named as areas where new tools and typologies are being developed. Financial institutions with exposure to shipping, commodities, or cross-border payments should expect new designations and guidance in these areas. Compliance programs that are calibrated for today's designation environment may need to be updated as new typologies emerge faster than annual review cycles can accommodate.
Sanctions are being designed to escalate and unwind at speed.
Both agencies flagged work on rapidly escalating sanctions pressure and on dismantling regimes in a structured way, as with Syria. Compliance programs need to be designed for change at speed, not just current-state coverage. A program that can screen today's list but cannot update screening logic within hours of a new designation or regime change is a program that will generate enforcement exposure during the gap.
What Your Compliance Program Should Do Next
The publication of this joint guidance is an implicit compliance obligation. Regulators rarely publish framework comparisons for academic interest. They publish them so that firms cannot later claim they did not understand the differences. Six actions deserve immediate attention:
Review your beneficial ownership logic against both regimes as separate analytical passes. Apply OFAC's 50% aggregate rule and OFSI's individual-plus-control standard as distinct analytical tracks, not a single shared threshold. The same ownership structure can produce different results under each regime, and applying one standard to both is a documented gap.
Audit your rejected-transaction reporting workflow for OFAC's 10-business-day requirement. Confirm the requirement is captured in your process documentation and that OFSI's distinct relevant-firm reporting obligations are separately mapped. A single shared reporting workflow for both regimes is not compliant.
Confirm your screening platform receives independent data feeds for both lists. Verify that OFAC's Consolidated Sanctions List and the UK Sanctions List are maintained as independent data sources, noting the January 2026 FCDO administrative change for UK list maintenance. A single combined feed may not reflect list changes in each regime at the same speed.
Verify your annual filing calendar includes both deadlines as separate obligations. OFAC's September 30 Annual Report of Blocked Property and OFSI's November 30 Annual Frozen Asset Review are distinct filings with distinct scope. Missing either because the other was treated as a substitute is an enforcement exposure.
Assess whether your recordkeeping policy meets OFAC's codified 10-year retention standard. OFSI does not specify a retention period, but OFAC's 10-year codified standard is a clear baseline. Policies written before the UK's strict liability standard took effect on June 15, 2022 may not adequately address OFSI's records-on-request obligations.
Brief your compliance team on the voluntary disclosure incentives in both regimes. OFAC's 50% reduction potential versus OFSI's up to 30% are materially different calculations when assessing how to respond to a potential breach. Document that briefing. It is evidence of a functioning compliance program and, in an enforcement context, evidence that your team understood the difference.
OFSI has no statute of limitations. OFAC has ten years. Neither answer is "don't worry about it." If your recordkeeping policy was written before the UK's strict liability standard kicked in on June 15, 2022, it may be time to revisit it. Sentinel keeps the audit trail so that conversation stays theoretical.
How Sentinel Addresses These Requirements
Truth Technologies built the Sentinel Compliance Platform for exactly the operational complexity this guidance describes. Firms managing OFAC and OFSI obligations simultaneously cannot afford screening infrastructure that treats them as a single undifferentiated process.
Sentinel screens against OFAC's Consolidated Sanctions List and the UK Sanctions List independently, with separate alert logic for SDN blocking versus OFSI asset freezing obligations. Configurable UBO logic applies OFAC's aggregate 50% rule and OFSI's individual-plus-control standard as distinct analytical tracks. Sentinel's workflow engine flags OFAC-reportable rejected transactions for the 10-business-day deadline while applying OFSI's separate relevant-firm reporting framework where applicable. Full transaction records are retained in accordance with OFAC's codified 10-year standard, with documentation logic that supports OFSI's records-on-request obligations. And continuous data feeds ensure Sentinel reflects both OFAC and OFSI list changes, including the January 2026 FCDO transition, without manual intervention.
See How Sentinel Handles Dual-Jurisdiction OFAC and OFSI Obligations
Request a demonstration tailored to your institution's sanctions compliance program and cross-jurisdictional risk profile.
Official References
- The U.S. and UK Economic Sanctions Authorities: A Comparative Overview — OFAC and OFSI, 23 June 2026
- Joint Comparative Overview — Full PDF, OFAC and OFSI, 23 June 2026
- Achieving Our Objectives; Supporting Our Stakeholders: OFAC-OFSI Enhanced Partnership Exchange 2026 — OFSI Blog, 23 June 2026
- OFAC-OFSI Enhanced Partnership Exchange 2026 — US Department of the Treasury
- US and UK Sanctions Authorities Release Joint Comparative Guidance — Clyde and Co, June 2026
- Publication of OFAC-OFSI Comparative Overview — OFAC Recent Actions, 23 June 2026
Truth Technologies provides AML, KYC, OFAC, and sanctions screening compliance solutions through the Sentinel platform. This post is published for informational purposes only and does not constitute legal advice. All facts are sourced from the official OFAC-OFSI joint guidance and official sources linked above.
