
Washington's 'economic D-Day' campaign threatens penalties for Iran's biggest trade partners. China buys 90% of Iranian oil; UAE hub at risk; Turkey, Iraq, India exposed.
The U.S. announced an “economic D-Day” campaign Monday to isolate Iran from the global economy, threatening penalties against countries and companies that continue doing business with Tehran.
The move targets the trade networks that have sustained Iran’s economy through nearly six months of conflict. Skepticism persists over whether the administration will follow through. The threat puts Washington on a collision course with a handful of governments that account for most of Iran’s remaining foreign trade.
China is the biggest buyer of Iranian oil and serves as Tehran’s crucial link to the global economy, accounting for about 90% of its oil exports, according to U.S. government data.
Beijing reported $9.96 billion in bilateral trade with Iran in 2025, excluding roughly $31.2 billion in unreported Iranian crude oil exports to China that year, according to the U.S.-China Economic and Security Review Commission. Independent Chinese refiners take in the bulk of it, often rebranded as Malaysian or Indonesian crude and settled through intermediaries outside the dollar system, according to Kpler. The U.S. Treasury has sanctioned several of those refineries this year for Iranian oil purchases, while sparing Chinese financial institutions.
Beijing has openly opposed U.S. sanctions against Iran, arguing that economic pressure will not resolve the disputes. In May, China ordered domestic firms to disregard U.S. sanctions on five refiners linked to the Iranian oil trade.
Beijing is unlikely to push back directly on Washington’s sanctions push. It will “quietly step up compliance” among state banks and oil companies to avoid getting caught in the net, Dan Wang, China director at Eurasia Group, said. He pointed to “a dichotomy between the official statement and the private practice.”
“Chinese authorities care more about dollar access in financing and market entry to the U.S.,” Wang said.
The United Arab Emirates, located 50 miles from Iran across the Persian Gulf, has long been a major trading hub for Tehran.
Bilateral trade amounted to around $28 billion in 2024, when the Emirates was Iran’s largest source of imports, contributing over 30%, according to World Trade Organization data. The UAE was also Iran’s third-largest export destination, making up 12% of its shipments, totaling more than $7 billion.
That relationship hit a snag last week after the UAE moved to suspend all trade and financial transactions with Iran, following two ballistic missiles fired toward Emirati territory. One of those missiles targeted UAE-owned tankers.
Iran has relied on UAE banks and its financial system to access the world economy through illicit, often murky transactions. Cutting off Iran would require more forceful actions from Emirati authorities to crack down on opaque financial and trading activity, according to the Washington Institute.
“The majority of Iran’s transshipment, smuggling, and shadow banking activity takes place in Dubai, so Washington must do what it can to help the UAE’s national leaders in Abu Dhabi convince and cajole Dubai’s leaders to play ball,” Matthew Levitt, a former U.S. Treasury official, wrote in a note Monday.
Turkey maintains significant commercial ties with Tehran, importing Iranian natural gas and exporting manufactured goods south.
Bilateral trade reached $5.7 billion in 2024, according to the Turkish Ministry of Foreign Affairs. Ankara exports mostly machinery and parts, chemical and agricultural products, while importing energy products from Tehran. Under a 25-year gas supply contract that expired at the end of July, Turkey’s imports of Iranian gas spiked this year while Iran’s share of Turkey’s total natural gas imports rose to 18.6%, according to local media.
Ankara has sought to diversify toward other suppliers, expanding pipeline imports from Azerbaijan and Russia. It has not signaled that it intends to cut Iran off.
Iraq, dependent on Iranian electricity and gas, has historically traded billions with Tehran.
Iran renewed a five-year contract in March 2024 to supply Iraq with up to nearly 660 billion cubic feet of natural gas a year. Electricity imports from Iran accounted for more than 30% of Iraq’s electricity generation in 2023, according to the U.S. Energy Information Administration. Iraq reportedly pays Iran around $4 billion to $5 billion a year for natural gas for electricity generation.
Iraq-Iran trade reached more than $10 billion in 2025, according to Reuters. Tehran exports food, consumer goods and other products to the Iraqi market. The trade has dwindled this year because of increased security risks in the region and intermittent disruptions along border crossings since the war started in late February. The fresh U.S. sanctions could curtail Baghdad’s payments for Iranian energy.
India, among Iran’s top five trading partners, has seen bilateral trade fall in recent years to around $1.6 billion in the year ending March 2026, according to India’s Department of Commerce, down from $2.3 billion in the year through March 2023. New Delhi primarily exports rice, tea, sugar and pharmaceuticals to Iran, and imports dry and fresh fruits from Iran.
In April, India resumed importing crude oil from Iran following a seven-year halt, after the U.S. temporarily lifted sanctions on Iranian crude exports. Those trades now will be tested if Washington makes good on its threat to sanction any entity, including Indian refiners, that has procured Iranian energy.
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