China Is Iran's Top Oil Customer. Can Trump Use Sanctions To Change That?
- By Kian Sharifi and
- Reid Standish

The United States has imposed sanctions on a network of people and firms accused of facilitating the sale of millions of barrels of Iranian oil to China as U.S. President Donald Trump’s administration seeks to bring Iran’s crude exports to zero.
The new tranche of sanctions is an opening shot against Beijing and Tehran, designed to put China on notice without disrupting back-channel discussions to explore the potential for a deal with Iran that restricts its nuclear program.
Analysts say these sanctions -- which targeted individuals and vessels linked to the so-called shadow fleet of ships that transport embargoed Iranian oil -- could be effective but will not drive Iran’s oil exports down to zero. Tougher measures would be needed to do that -- going after Chinese institutions, such as banks that process oil transactions, for example-- but that could risk escalating tensions between the world’s top two economies.
“This is a toe in the water, but not because Trump necessarily wants to tread carefully,” said Tom Keatinge, director of the Center for Finance and Security at the Royal United Services Institute (RUSI) in London. “This is a way to send a message and put everyone involved in moving Iranian oil on notice.”
Why Is Trump Hitting Iran?
Iran’s economy is heavily reliant on oil revenues, which the U.S. State Department on February 6 said are used to fund “terrorists and proxy groups,” referring to Iran’s network of regional armed groups that oppose Israel and the U.S.
The new sanctions target over a dozen people and companies in China, India, and the United Arab Emirates, including Iranian and Indian citizens and crew management firms as well as a collection of tankers.
“These sanctions, and what is sure to follow, will almost certainly have an impact,” said Nader Itayim, a Middle East energy expert at the U.K.-based Argus Media. “The question really is how big that impact might be. And that will ultimately depend on how seriously the Trump administration chooses to go after the Iranian oil trade.”
The 2015 nuclear deal lifted U.S. sanctions, allowing Iran to sell oil. Trump withdrew from the deal in 2018, reimposing sanctions that cut exports to around 400,000 barrels per day.
Iran later boosted sales through sanctions evasion, rising Chinese demand, and looser U.S. enforcement under former President Joe Biden.
The new sanctions are part of the Trump administration’s return to the "maximum pressure" campaign that defined the Republican president’s Iran policy in his first term. Trump says Iran is "too close" to developing a nuclear bomb, while Tehran has long claimed its atomic program is peaceful.
“One of his objectives now is to bankrupt Iran,” Keatinge said. “Since [Trump] was last president, the sanctions community at large -- public and private -- have learned a lot about how to target a country's oil revenue and go after the broader infrastructure, largely from the experience with Russia's own shadow fleet.”
As part of its effort to evade Western sanctions on its oil exports and help fund its war against Ukraine, Russia has employed a shadow fleet of hundreds of aging tankers largely registered in non-Western jurisdictions to export the majority of its oil to market.
How Does The 'Shadow Fleet' Operate?
Iran’s own “shadow fleet” of tankers has been crucial to its ability to evade sanctions and covertly transport oil to China and other destinations.
This strategy includes ship-to-ship transfers, intermediaries, concealed financial transactions, and rebranding the oil to disguise its Iranian origin, making it appear to come from another country.
These methods have allowed Iran to keep moving oil and generating revenue despite sanctions.
According to United Against Nuclear Iran, a nonprofit group that campaigns against threats it says are posed by Tehran, 587 million barrels of oil were moved by Iran in 2024 and 91 percent of those exports went to China.
China has long been the largest buyer of Iranian oil, but since 2022 it has stopped officially purchasing it to avoid U.S. sanctions, according to data from commodities research firm Kpler.
Despite the official stop in purchases, billions of dollars' worth of sanctioned Iranian oil have still found their way to China through the shadow fleet network used by Iran.
What's Trump’s Next Move?
U.S. officials have sought to prevent Iran from shipping the oil by pressing China and other countries not to participate, and imposing sanctions on vessels that it believed could help transport the oil.
The latest round of sanctions targeted vessels and shipping companies said to be involved in moving Iranian oil and Keatinge, the expert from RUSI, says this reflects the evolving playbook developed in recent years as the United States and its allies have targeted ships moving Russian oil.
He says these measures could be expanded beyond just targeting ships that move the oil to also sanction other aspects of the shadow fleet infrastructure, such as the companies that insure the vessels, the agencies that recruit the crews, the ports that receive the ships, and a broader diplomatic campaign to pressure the countries that register them.
Argus Media’s Itayim believes such moves are likely to scare off “the more risk-averse Chinese buyers” but would have a limited impact in curbing the flow of Iranian oil. To drive Iranian oil exports down further, he says, would require more pressure on Chinese ports and on buyers and intermediaries, including even banks in the country.
Doing so could have ripple effects on Washington’s ties with Beijing and escalate tensions, which were recently inflamed with a new round of tit-for-tat tariffs on February 4.
Keatinge says that curbing Iranian oil could be part of a broader conversation between Trump and Chinese President Xi Jinping and that the recent sanctions provide a way to ramp up pressure on Tehran without fueling additional tensions with Beijing.
“China is the big problem to solve if you want to squeeze Iranian oil, but does Trump want a sanctions war with Xi?” he said.