The United States is preparing what Treasury Secretary Scott Bessent has described as an “economic D-Day” against Iran, signalling a major escalation in Washington's financial pressure campaign against Tehran. Bessent said the Donald Trump administration was preparing to use broad economic and enforcement powers to sever the financial channels that support Iran's government, following what Washington describes as extensive damage to the country's military and nuclear capabilities.
In remarks announcing the planned offensive, Bessent said the administration had created the conditions to deploy “every agency, every authority and action” that had previously been considered difficult to use. He described the next phase as an effort to financially isolate the Islamic Republic and warned governments, companies and other entities considering continued economic engagement with Iran that the US approach to enforcement had changed. Bessent also accused Tehran of using security guarantees as a form of “extortion” and argued that the costs for those challenging US policy would now be substantially higher. The Treasury secretary did not provide a detailed list of the measures that would form the offensive, leaving the exact scope and timing of the proposed action unclear.
Pressure on Iran intensifies
The announcement comes amid heightened tensions between Washington and Tehran over Iran's military and nuclear programmes. Bessent claimed that the Trump administration had dismantled much of Iran's military capability, including nearly all of its military factories, and said the country's nuclear programme had been effectively “buried”. These are US government claims, rather than independently established assessments in the supplied material, and the extent of the reported damage remains a matter of international scrutiny.
The Treasury Department is expected to have a central role if Washington expands the campaign, given its authority over financial sanctions and enforcement against individuals, companies, banks and networks accused of supporting sanctioned Iranian activities. A broader campaign could focus on Iran's revenue sources, international financial connections and mechanisms used to move money across borders. The stated objective is to make it significantly harder for Tehran to access or transfer funds through the international financial system.
Global businesses face pressure
Bessent's warning also extends beyond Iran itself. His comments suggest that foreign governments and businesses maintaining economic ties with Tehran could face greater scrutiny or enforcement risks as Washington seeks to tighten the sanctions regime. The approach could place additional pressure on countries that continue trading with Iran, particularly those involved in transactions connected to Iranian energy revenues or financial institutions.
Iran has previously described US sanctions as “economic terrorism” and rejected Washington's pressure campaign. The latest US announcement could therefore further intensify the confrontation between the two countries, while also creating complications for international businesses seeking to maintain commercial relationships with Tehran.
For now, the administration has not publicly detailed the full package of measures covered by Bessent's “economic D-Day” warning. The next steps by the US Treasury and other federal agencies will determine whether the announcement translates into a significantly expanded sanctions and enforcement campaign. Any new restrictions could have wider consequences for Iran's access to foreign currency, international banking and oil-related revenues, while potentially affecting countries and companies that continue to engage with the Iranian economy.
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