Iran Sanctions Target the Dollar System as China Tests Trump's Resolve

Treasury Secretary Scott Bessent has threatened to lock any firm that launders money for Iran out of the US dollar system, but the real test is whether Washington will enforce it against China weeks before a Trump-Xi summit.

One Word Doing a Lot of Work

Bessent's warning turned on a single term. Any 'entity' that launders money for Iran will lose access to the dollar, he said on Monday at the Treasury Department, a line some coverage loosened to mean any country.

The distinction matters. It lets Washington aim at individual banks, brokers, and shipping firms without formally blacklisting a sovereign state, giving Trump room to squeeze Iran's cash pipeline while leaving space to negotiate.

The Treasury named nearly 60 entities, individuals, and vessels tied to Iranian oil and weapons networks. More than a third, 21 in total, are based in China.

The China Collision Course

That is where the plan gets dangerous for Trump. China buys the bulk of Iran's oil, and Bessent said last week the country had historically taken about 90% of it. Punishing the Chinese firms and banks that turn that oil into cash would strike at Iran's largest customer just as Trump prepares to host Xi Jinping at the White House on 24 September.

Asked directly whether Chinese banks were in the firing line, Bessent refused to grant them cover. 'No one is above the reach of US sanctions,' he said. 'If they facilitate transactions and are part of the ecosystem that turns Iranian oil into money, into repression, they will be targeted.'

Beijing has already pushed back. Foreign ministry spokesperson Lin Jian said sanctions and pressure were not a solution and urged a diplomatic path. Analysts doubt Washington will risk blowing up a fragile trade truce days before the summit.

Why This Lands at Your Local Pump

For US drivers, this is a wallet story. The war has kept traffic through the Strait of Hormuz at a trickle, squeezing the crude that refineries turn into fuel.

The national average for regular gasoline (petrol) sits at $4.11 (£3.01) a gallon (£0.797 per litre), up nearly a dollar from a year ago and among the highest August averages the American Automobile Association has recorded. Crude has traded above $100 (£73) a barrel, up from around $70 (£51) before the war.

Choking Iran's oil-to-cash pipeline harder could tighten global supply further and feed straight back into what Americans pay at the pump.

A Threat Without a Bill Yet

The campaign lands as the US war on Iran nears its six-month mark, with a 60-day ceasefire struck in June already in tatters. For all the D-Day billing, few concrete penalties landed on Monday, and markets barely moved.

Bessent said the US would send individual countries timelines to cut ties and give them a window to comply rather than name targets outright. He expects sanctions on one major Iran-linked financial institution by the end of this week.

The pressure is already biting elsewhere. Iran's rial crashed past 2 million to the dollar on the open market for the first time on Monday, its weakest level on record, even as the official rate held near 1.5 million.

Whether that pain, and the threat to the dollar system, forces Tehran to fold or simply hardens its grip on Hormuz is the question Trump's China gamble will answer.