People gather on a beach near Bandar Abbas, Iran, with vessels in the Strait of Hormuz visible in the background, on May 31. [Reuters]
People gather on a beach near Bandar Abbas, Iran, with vessels in the Strait of Hormuz visible in the background, on May 31. [Reuters]

President Donald Trump has declared an "economic war" on Iran, but actually strangling the Iranian economy would require simultaneously blocking three massive bypass routes: China, which buys Iranian oil in bulk; Dubai in the UAE, which supplies goods and foreign currency; and a web of "shadow banking" networks that move money beyond the reach of sanctions. These are the very channels that have allowed Iran to survive decades of US pressure, and how effectively Washington can shut them down will determine whether its economic isolation campaign succeeds.

According to Reuters and CNN on Thursday, oil is the most critical revenue source. China effectively serves as the primary destination for Iranian crude, absorbing more than 80 percent of Iran's maritime oil exports. Commodity data firm Kpler estimated that China purchased an average of 1.38 million barrels of Iranian oil per day last year.

Over the past decade or so, China has also built its own trading network designed to circumvent US sanctions. At its core are independent refineries that process Iranian crude and have limited exposure to US markets. These operators relabel Iranian oil as originating from Malaysia or Indonesia, settle payments in Chinese yuan, and route transactions through intermediaries that are difficult to trace.

Washington has already set its sights on this network. The US Treasury sanctioned Chinese independent refineries in April for purchasing billions of dollars' worth of Iranian crude and warned that secondary sanctions could be imposed on Chinese banks facilitating those transactions.

The question is how far the US is willing to escalate. Seriously disrupting Iran's oil payment network would require targeting not just independent refineries but major Chinese financial institutions. Restricting large banks' access to dollar clearing systems could amplify the sanctions' impact, but it also risks turning the anti-Iran economic campaign into a broader US-China financial confrontation — a costly choice for the Trump administration as it seeks to extend a tariff truce ahead of Chinese President Xi Jinping's planned visit to the United States next month.

Vessels are docked at the Khor Fakkan container terminal on the Gulf of Oman coast. [AFP]
Vessels are docked at the Khor Fakkan container terminal on the Gulf of Oman coast. [AFP]

The second bypass route runs through the UAE, and Dubai in particular. Dubai has long served as Iran's primary hub for sourcing foreign goods and hard currency.

According to the World Trade Organization, the UAE supplied about $21 billion worth of goods to Iran in 2024 — before the war — accounting for 30 percent of Iran's total imports that year. The UAE also absorbed 13 percent of Iran's total exports in the same period. Bilateral non-oil trade alone reached $6.6 billion, much of it re-exports routed through Dubai and other UAE ports.

This week, however, the UAE announced it would indefinitely suspend all financial and economic transactions with Iran. One of Iran's most critical external trade arteries has effectively been cut even before Washington's economic isolation campaign has fully taken shape.

Even so, observers note that a government-level suspension alone will not be enough to fully block Iran's informal trade. Dubai is home to a dense concentration of free-trade zones, currency exchanges and trading companies, and Iran has built an intricate web of shell companies and financial networks there to evade US sanctions.

The third lifeline is Iran's shadow banking apparatus, scattered across the international financial system. Shut out of mainstream global finance, Iran has developed an elaborate alternative payment network — using offshore shell companies, currency exchanges and trading firms to move oil export revenues and procure needed goods.

An analysis by the Financial Crimes Enforcement Network, a unit of the US Treasury, found that potential Iran-linked shadow banking activity passing through US correspondent accounts reached approximately $9 billion in 2024. Of that total, about $5 billion involved transactions conducted through offshore shell companies with no substantive business operations.

CNN reported that the financial and trade networks helping Iran evade sanctions and procure weapons extend beyond the UAE to Hong Kong and Singapore as well. Cutting off all the channels Trump has cited — oil smuggling, currency exchanges, cash transfers, ship registrations and shell companies — would require financial and law enforcement authorities in multiple countries to act in concert.

Another complicating factor is that Iran has spent decades adapting to US sanctions and building what analysts call a "survival economy." Each time a sanctioned company or trading network is shut down, Iran finds ways around it by standing up new shell companies and intermediaries.


sjy@heraldcorp.com