WASHINGTON—Iran established a clandestine banking and finance system to handle tens of billions of dollars in annual trade banned under U.S.-led sanctions, enabling Tehran to endure the economic siege and giving it leverage in multilateral nuclear talks, according to Western diplomats, intelligence officials and documents.
The system, which comprises accounts in foreign commercial banks, proxy companies registered outside the country, firms that coordinate the banned trade, and a transaction clearinghouse within Iran, has helped Tehran resist the Biden administration’s pressure to rejoin the 2015 nuclear deal, buying it time to advance its nuclear program even while negotiations were under way. Officials say they are closing in on a deal, with the release of two British women in recent days foreshadowing a potential agreement within days.
Years of sanctions have hobbled Iran’s economy and caused its currency, the rial, to collapse. But the ability to boost trade roughly to pre-sanction levels has helped the economy rebound after three years of contraction, alleviating domestic political pressure and bolstering Tehran’s negotiating position, say the officials and some analysts.
Iran’s success at circumventing trade and finance bans, apparent in trade data and confirmed by Western diplomats and intelligence officials, shows the limits of global financial sanctions at a time when the U.S. and European Union have sought to use their economic might to punish Russia for its invasion of Ukraine. The U.S. and EU have barred major Russian banks from trading dollars and euros and frozen the Russian central bank’s assets held overseas. As a result, the ruble has lost 13% of its value against the dollar since the Feb. 24 invasion. At the same time, the Biden administration has sought Russia’s cooperation in rounds of talks in Vienna aimed at reviving the deal.
According to the documents and Western officials, the clandestine banking system works like this: Iranian banks that serve companies barred by U.S. sanctions from exporting or importing engage affiliate firms in Iran to manage sanctioned trade on their behalf. Those firms establish companies outside of Iran’s borders to serve as proxies for the Iranian traders. The proxies trade with foreign purchasers of Iranian oil and other commodities, or sellers of goods for import into Iran, in dollars, euros or other foreign currencies, through accounts set up in foreign banks.
Some of the revenue is smuggled into Iran by couriers who carry cash withdrawn from the proxy company accounts abroad, according to some of the officials. But much of it remains in bank accounts abroad, according to the Western officials. The Iranian importers and exporters trade foreign currency among themselves, on ledgers maintained in Iran, according to the Iranian central bank.