The United States Treasury Department unveiled a sweeping new sanctions package against Iran on Monday, with Treasury Secretary Scott Bessent describing the measures as "the single greatest financial offensive ever marshalled against an adversary" — part of what the Trump administration has branded 'Operation Economic Outcast.' The announcement targets Iran's aviation, digital assets, gold, technology and shipping sectors, and imposes restrictions on nearly 60 individuals, entities and vessels. Bessent warned that any country continuing to trade with Tehran risks being shut out of the dollar-based global financial system, calling on allies and rivals alike to sever economic ties with the Iranian regime.
The sanctions arrive almost six months into an active US-Israeli military campaign against Iran that began on 28 February, and alongside a US naval blockade that Iran's own central bank governor has acknowledged has "virtually stopped" the country's crude oil exports. The new measures suspend broad exemptions to existing sanctions, including those covering academic exchanges, personal remittances and certain sporting activities, with affected organisations given until 8 September to wind down operations. The package is part of a long-standing sanctions architecture dating back to 1979, substantially deepened under successive administrations, and expanded aggressively since the Trump administration withdrew from the 2015 nuclear deal during its first term.
Iran's response was defiant. Economy Minister Ali Madanizadeh said the government was "fully prepared" and had a two-year plan to manage the impact, while security chief Mohsen Rezaei threatened "earthquake-like" retaliation and warned that if Gulf neighbours joined the US campaign, "not a drop of oil will leave the Persian Gulf and the Strait of Hormuz." The strait — a narrow waterway south of Iran through which roughly one-fifth of the world's oil and gas normally passes — has already been severely disrupted since the conflict began. Iran's foreign ministry dismissed the package as evidence of US desperation, and academics close to Tehran argued that nearly every sector of Iran's economy has been under primary and secondary sanctions since 2018, questioning what the announcement would add in practice.
The central test of the sanctions will be whether major trading partners comply. China has for years absorbed roughly 90 percent of Iran's crude oil exports — buying some 1.4 million barrels per day in 2025, a figure already reduced by the naval blockade. Beijing's foreign ministry again rejected the measures as unilateral and illegitimate, saying pressure and sanctions were not the solution. Bessent conspicuously declined to name specific countries for penalties or to target Chinese financial institutions in Monday's list, with experts noting that Washington is wary of provoking a broader confrontation with Beijing ahead of expected Trump-Xi talks. The United Arab Emirates, Iran's largest trading partner in the Middle East, announced it was ending all trade with Iran ahead of the US announcement — a step analysts say significantly tightens the economic noose within the Persian Gulf itself.
The economic ripple effects are already being felt well beyond the region. Petrol prices in the United States have climbed to more than $4 a gallon, up from $2.98 when strikes on Iran began, driven by the disruption to global oil supply caused by the blockade of the Strait of Hormuz. Gold prices jumped 0.8 percent on Monday to $4,639 per ounce, while Brent crude — the global benchmark — fell more than $2 a barrel as markets weighed the prospect of further supply disruption against the limited direct impact of sanctions on Iranian energy flows in the short term. With midterm elections approaching in November and polls showing only around a third of Americans supporting the war, the economic toll is emerging as a significant political liability. Diplomatic efforts continue in parallel: Pakistan's army chief visited Tehran on Monday in a fresh mediation bid, and Oman's foreign minister was due to follow. Whether economic pressure alone can break the deadlock — or whether it risks provoking the very escalation it seeks to prevent — remains the central and unresolved question.