WASHINGTON — US President Donald Trump has dramatically escalated his economic campaign against Iran, warning that any country, business or institution that provides Tehran with a financial or commercial lifeline could face severe economic consequences.
Trump announced what he described as an unprecedented campaign of “economic warfare and isolation” against Iran as the conflict approaches its sixth month and diplomatic efforts remain stalled.
In a post on Truth Social on Wednesday, August 19, Trump said the United States was launching the “MOST CRUSHING ECONOMIC OPERATION EVER TAKEN AGAINST ANY COUNTRY,” while warning countries that continue facilitating trade or financial activity involving Iran.
He specifically pointed to financial institutions, businesses, airports and government entities that could provide Iran with what he called “any type of lifeline.”
Trump expands threat beyond Iran
The warning is significant because it extends Washington’s pressure campaign beyond Iranian entities themselves.
Trump did not identify specific countries or spell out exactly what penalties would be imposed. However, his administration has been considering ways to intensify pressure on Iran’s oil revenues, financial networks, shipping and other channels used to keep its economy functioning.
Reuters reported that possible measures could include tougher action against oil shippers, purchasers, currency exchangers and companies facilitating Iranian trade, while further aviation restrictions have also been discussed.
Trump has also previously threatened so-called secondary tariffs against countries doing business with Iran. Reuters reported that legislation passed by the US Senate could potentially provide additional authority for tariffs against countries supporting Iran’s commerce and weapons procurement, although the measure still requires action in the House.
Oil, banks and shipping in the crosshairs
The new pressure campaign could have consequences well beyond Iran’s borders because the country remains deeply connected to global energy and financial networks.
Trump’s warning specifically mentioned exchange houses, cash transfers, swap lines, ship registries, front companies and oil smuggling as examples of mechanisms that Washington wants to disrupt.
The announcement also comes as oil prices remain sensitive to developments surrounding the conflict and the Strait of Hormuz, a critical global energy route.
The Business Times reported that Brent crude had closed near $92 a barrel, while West Texas Intermediate was trading above $84 after Trump’s announcement.
Strait of Hormuz remains a major pressure point
The economic escalation is unfolding alongside continuing uncertainty over the Strait of Hormuz.
The waterway is one of the world’s most important energy chokepoints. AP reported that only 10 vessels transited the strait on Tuesday, fewer than a tenth of the number that typically passed through before the war.
Trump has insisted that the strait is open and operating, while Iran continues to exercise significant control over shipping activity in the area.
The dispute over the waterway has become one of the central flashpoints of the conflict, with disruptions threatening global energy supplies and increasing risks for international shipping.
UAE cuts economic ties with Iran
The pressure on Tehran also intensified from within the region.
The United Arab Emirates announced Wednesday that it was suspending all trade and financial transactions with Iran until further notice, after the UAE said it came under renewed missile fire. Iran denied launching missiles toward the UAE.
The move could be particularly significant for Tehran because the UAE has historically served as an important commercial and re-export hub for Iranian trade.
According to figures cited by AP, the UAE accounted for more than 30% of Iran’s imports, worth roughly $21 billion, in 2024, while nearly 13% of Iran’s exports, valued at about $7 billion, went to the UAE.
That means the loss of UAE trade channels could further squeeze an Iranian economy already under heavy pressure.
Iran’s economy already under severe strain
The latest US threat comes after months of economic deterioration inside Iran.
Reuters reported that Iran’s inflation rate reached 66% in July, while food prices surged by 128% and the Iranian rial continued to weaken. The war has also damaged infrastructure, disrupted trade and placed additional pressure on government revenues.
AP, meanwhile, reported that the International Monetary Fund expects Iran’s inflation to approach 70% this year, alongside an estimated 5.4% economic contraction.
That leaves Tehran facing a difficult combination of military pressure, sanctions, disrupted trade and declining purchasing power.
What happens next?
The biggest uncertainty is how far the Trump administration is prepared to go against Iran’s trading partners.
The White House has not yet provided a detailed list of penalties stemming from Trump’s latest warning. That leaves governments, banks, shipping companies and multinational businesses watching closely for the next round of US measures.
The stakes could be particularly high for countries and companies with commercial relationships with Iran, especially those involved in oil, shipping, banking, aviation and cross-border payments.
Reuters noted that targeting Iran’s commercial lifelines could also test Washington’s willingness to confront entities linked to major trading partners such as China.
For now, Trump’s message is clear: Washington is no longer threatening economic pressure against Iran alone. It is warning the wider international business community that helping Tehran could itself become a target.
And with the Strait of Hormuz still at the center of the crisis, the next US sanctions move could have consequences far beyond Iran’s borders.
This is no longer simply a US-Iran economic showdown—it could become a test of how much of the global economy Washington can pressure to choose a side.
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