Trump says countries doing business with Iran face 25% tariff on US trade

Donald Trump has announced that any country “doing business” with Iran will face a 25% tariff on its trade with the United States, dramatically expanding Washington’s economic pressure campaign beyond Tehran itself.​

What Trump announced

Trump said in a Truth Social post that, “effective immediately,” nations conducting business with the Islamic Republic of Iran “will pay a tariff of 25% on any and all business being done with the United States of America,” calling the order “final and conclusive.” The White House and trade officials have so far offered few details on how the measure will be implemented or how “doing business” with Iran will be defined in practice.​

Context: Protests and pressure on Tehran

The move comes as Iran faces weeks of large anti‑government protests and a harsh crackdown that has left hundreds dead, according to human rights groups. Iran’s economy is already struggling under long‑running U.S. sanctions, with high inflation and a weakened currency driving up food prices and other basic costs.​

Global reach of the 25% tariff

A 25% surcharge on all U.S. trade with countries that maintain ties to Iran effectively turns the policy into a “secondary tariff” regime, penalizing third countries rather than Iran directly. Iran’s major trading partners include China, Iraq, the United Arab Emirates, Turkey, and India, so the new duty could disrupt significant flows of goods between those economies and the U.S. if fully enforced.​​

Legal and diplomatic uncertainty

Trade lawyers note that Trump appears to be leaning on emergency powers previously used for other tariff actions, but no formal legal framework or executive order has yet been published spelling out exemptions or enforcement mechanisms. The lack of clarity has left allies and businesses unsure whether services, financial transactions, or only physical goods will be covered, and how compliance will be monitored.​

Potential fallout for allies and markets

European governments and key Asian partners are now assessing whether they must scale back or restructure their Iran ties to avoid the 25% hit on U.S. trade. Analysts warn that, if applied broadly, the policy could raise costs for U.S. consumers, complicate supply chains, and deepen rifts with allies already uneasy about earlier rounds of Trump tariffs.​