Treasury chief expands secondary sanctions threat against Iran's global enablers while holding off naming a major bank for now.
U.S. Treasury Secretary Scott Bessent announced a sweeping new package of economic sanctions against Iran on Monday, August 24, 2026, targeting dozens of entities, individuals and vessels tied to Tehran's oil trade, nuclear program and financial networks, while stopping short of the harshest step under consideration: cutting a specific major financial institution off from the U.S. dollar system. Speaking from the Treasury Department's Cash Room in Washington, D.C., Bessent said the campaign, dubbed "Operation Economic Outcast," was launched "at President Trump's direction" and represents an effort to sever what he called "every economic lifeline" sustaining the Iranian government. He indicated that a major financial institution would be sanctioned by the end of the week, though he declined to name it or impose that penalty immediately.
The announcement builds on days of escalating rhetoric from Bessent, who told CNBC and other outlets in the preceding week that the United States would impose "the toughest sanctions in history" on Iran. The Monday rollout combined broad sectoral sanctions determinations with dozens of individual designations, alongside a warning to foreign governments that continued economic engagement with Tehran carries rising risk.
Sectoral Sanctions Target Five Iranian Lifelines
Central to Monday's action were new sectoral sanctions determinations covering five areas Bessent described as among Iran's "most vital lifelines" exploited abroad: digital assets, technology, gold, aviation and shipping. Treasury officials said these determinations are designed to choke off financial and material support flowing to Iran through cryptocurrency transactions, technology transfers, precious metals trade, aircraft servicing and maritime shipping networks.
The sectoral designations broaden the scope of potential secondary sanctions, meaning foreign companies and financial institutions that engage in these activities with Iranian counterparts now face heightened exposure to U.S. penalties. Bessent framed the sectoral push as part of a larger financial offensive, calling the overall effort an "economic D-Day" and describing it elsewhere as the "greatest financial offensive ever" mounted against the Iranian government.
Nearly 60 Entities, Individuals and Vessels Designated
As part of the rollout, the Treasury's Office of Foreign Assets Control sanctioned nearly 60 entities, individuals and vessels linked to Iran's nuclear, missile, cyber and oil revenue operations. Officials described a network of brokers, trading companies and so-called shadow fleet vessels operating across the United Arab Emirates, Hong Kong, China, Singapore, Switzerland and parts of Europe that have helped transport Iranian oil and channel revenue back to the regime and the Islamic Revolutionary Guard Corps-Qods Force.
Bessent also announced the suspension of certain general licenses that had previously permitted limited financial transactions with Iran, including remittance payments. The move tightens channels that had remained open even amid earlier rounds of sanctions, signaling a more comprehensive approach to isolating Iran's financial system from outside contact.
Warning to Foreign Governments Over Secondary Sanctions
Bessent used the announcement to issue a direct warning to countries maintaining economic ties with Iran, stating that every nation has "a defined timeline to shut down" the activities Treasury has identified or face U.S. action. He did not name specific countries that could face secondary sanctions, though his remarks were widely read as directed at major Iranian trading partners. He added that any entity found facilitating money laundering on behalf of Iran would be removed from the U.S. dollar system, reinforcing the administration's insistence that financial institutions worldwide face consequences for continued dealings with Tehran.
This warning follows earlier comments from Bessent, including a Reuters-reported statement from August 13 in which he said the U.S. would combine economic isolation "like the world has never seen before" with a continued blockade in the Strait of Hormuz aimed at restricting all shipping traffic into or out of Iranian ports.
Bank Sanctions Held Back as Bessent Signals Imminent Action
Despite the scale of Monday's measures, Bessent stopped short of naming or sanctioning any specific bank or major financial institution, a step widely regarded as the most disruptive tool available to Treasury. He declined to rule out targeting banks in the future and told reporters that a major financial institution would be sanctioned by the end of the week, though he offered no further details on which entity might be targeted or when exactly the announcement would come.
That omission forms the core distinction in Monday's rollout: an aggressive, wide-reaching expansion of sectoral and secondary sanctions paired with a deliberate decision to hold back the step seen as most capable of disrupting global financial flows tied to Iran. Bessent described Monday's actions as the beginning of a "wave of sanctions" that would continue in the days ahead, suggesting further measures, including the anticipated bank designation, are still to come.
