President Donald Trump’s threat to impose unprecedented economic pressure on Iran is aimed at more than Tehran itself. The broader objective is to make the countries, companies, banks and trading networks that keep Iran connected to the international economy reconsider their relationship with the Islamic Republic. Trump has warned that entities providing an economic lifeline to Iran could face severe consequences, while Treasury Secretary Scott Bessent has said Washington is preparing what he described as the toughest sanctions in history.
The strategy reflects a central reality of sanctions policy: isolating a country is considerably harder than sanctioning it. Iran has spent decades operating under American restrictions and has built commercial relationships that allow it to continue selling oil, importing goods and moving money despite those restrictions. Washington can increase the cost of those activities, but the effectiveness of its campaign will depend on whether it can persuade Iran’s most important trading partners to cooperate.
That makes China the most important test of the policy. It also puts countries such as Turkey, Iraq, the United Arab Emirates, India, Pakistan, Oman and Iran’s smaller regional trading partners in a difficult position. Their economic relationships with Tehran vary substantially, but each illustrates why complete isolation is difficult to achieve.
China Is The Main Economic Lifeline
China is by far the most consequential partner in Iran’s external economy because of its role as the principal buyer of Iranian crude. Data for 2025 indicate that China purchased roughly 1.38 million barrels of Iranian oil per day, accounting for more than 80 percent of Iran’s shipped oil according to commodity tracking estimates. Chinese purchases have therefore become one of the main reasons Tehran has continued to generate significant export revenue despite American sanctions.
The relationship is particularly important because Iranian oil does not necessarily enter China through a straightforward commercial chain. Iranian crude has been moved through intermediaries, complex shipping arrangements and smaller independent refiners that have limited exposure to American markets. Transactions can also be structured in ways designed to reduce the visibility of the Iranian origin of the oil, making enforcement considerably more complicated for Washington.
This explains why the new American strategy could focus increasingly on secondary sanctions. Instead of merely preventing American companies from doing business with Iran, Washington can threaten foreign companies with restrictions if they facilitate transactions that American authorities have prohibited. The purpose is to force businesses to calculate whether access to American finance and markets is worth more than their Iranian commercial relationships.
China, however, is unlikely to respond simply because Washington demands it. Beijing has repeatedly argued that sanctions and economic pressure do not provide a political solution, while its own energy requirements give it an economic incentive to maintain access to discounted Iranian crude. At the same time, China has much larger commercial relationships with other Gulf economies, meaning Beijing has reasons to avoid allowing its relationship with Iran to destabilize its wider regional interests.
Gulf And Regional Trade Creates Other Escape Routes
China may be Iran’s most important oil customer, but it is not the only country that matters to Tehran’s economic survival. The United Arab Emirates has historically been a major commercial gateway for Iranian goods, financial transactions and re-exports. Dubai in particular has long served as an important regional trading centre for businesses dealing with Iran, even though American sanctions have already restricted many Iran-linked financial activities.
The UAE’s relationship with Iran also demonstrates how quickly geopolitical tensions can change economic calculations. Abu Dhabi recently suspended financial and economic transactions with Tehran following a military escalation, according to reporting on the current crisis. That decision could reduce one of Iran’s important regional commercial channels, although the longer-term significance will depend on whether the suspension becomes permanent and how broadly it is enforced.
Iraq presents a different problem for Washington. Economic relations between Iraq and Iran involve not only ordinary trade but also energy. Iraq relies on Iranian natural gas for part of its electricity generation, while bilateral trade has remained substantial. Iraqi officials have warned that additional American sanctions could make it harder for Baghdad to maintain payments for Iranian energy without exposing Iraqi financial institutions to American restrictions.
This creates a practical limit to economic isolation. Washington may be able to pressure Iraq to reduce certain commercial links, but forcing Baghdad to abandon Iranian energy rapidly could create consequences inside Iraq itself. Economic sanctions therefore have to be designed around the difference between trade that supports Iran financially and trade that neighboring countries consider necessary for their own basic economic requirements.
Turkey And Pakistan Complicate The Strategy
Turkey is another important example because its relationship with Iran is based on ordinary commercial and energy interests rather than dependence on Iranian oil alone. The two countries conduct several billion dollars of trade each year, with Turkey importing Iranian natural gas while exporting manufactured products and other goods to Iran. Turkey has historically resisted attempts to completely sever these economic links, particularly when doing so would conflict with its own energy and regional interests.
Pakistan presents an even more complicated case because its economic relationship with Iran includes a significant informal component. The two countries share a long border, and cross-border commerce has historically involved fuel, food, agricultural products, medicines and other goods. Formal bilateral trade has remained below the ambitions of both governments, but unofficial commerce has created an additional channel that is difficult to eliminate through conventional sanctions.
For Washington, these relationships demonstrate that Iran’s economic network is not a single system that can be switched off. Some links are based on oil, others on natural gas, border trade, re-exports or basic consumer requirements. Closing one route can therefore encourage activity to move through another.
India Faces A Different Sanctions Dilemma
India’s relationship with Iran is much smaller than China’s, but it remains strategically significant because New Delhi has historically maintained commercial and connectivity interests involving Iran. Bilateral trade has fallen sharply since the United States intensified sanctions, declining from much higher levels before the renewed American pressure. Recent trade has been dominated by Indian exports, including agricultural and pharmaceutical products.
This distinction matters because not all trade with Iran has the same strategic significance. A policy aimed at blocking oil revenue and financial networks is different from one that restricts food, medicine or other essential goods. Washington can attempt to exempt humanitarian trade, but companies and banks may still become cautious when sanctions rules are complex or penalties are severe.
India therefore illustrates the broader diplomatic challenge facing Washington. The United States can make Iranian trade more difficult without necessarily wanting to eliminate every legitimate commercial transaction. The more expansive the definition of economic support becomes, however, the greater the risk that sanctions begin affecting activities that other countries regard as legitimate and necessary.
Isolation Depends On Closing Networks, Not Borders
The central weakness in any attempt to isolate Iran is that economic isolation does not require Iran to maintain normal relations with the Western financial system. Tehran can survive with a much narrower group of trading partners if those partners are willing to continue doing business. China’s role in Iranian oil exports demonstrates how a single large buyer can become disproportionately important after sanctions reduce the number of legitimate markets available to Tehran.
The experience of the past year also suggests that sanctions can substantially constrain Iran without completely eliminating its energy exports. Despite renewed American maximum-pressure policies, Iran continued sending large volumes of crude to China in 2025. More recent reporting indicates that the war and disruption around the Strait of Hormuz have already altered Iran’s broader trade flows, making it harder to determine how much of the decline is caused by sanctions and how much by the wider conflict.
Trump’s proposed escalation is therefore less about discovering a new economic weapon than about attempting to make existing American financial power more comprehensive. The United States can target banks, insurers, shipping companies, oil traders and intermediaries and can threaten foreign businesses with loss of access to American markets. The more successfully these measures are enforced across countries, the more expensive it becomes for Iran to maintain international commerce.
But the strategy also has a clear limitation. Washington cannot simply order China, Turkey, Iraq, India or other sovereign states to abandon their economic interests. Each country will assess the cost of complying with American demands against the value of maintaining ties with Iran. The success of the isolation campaign will therefore depend not on whether Iran has trading partners, but on whether those partners conclude that doing business with Tehran has become too costly to justify.
That is ultimately the real test of Trump’s strategy. Iran does not need unrestricted access to global trade to withstand sanctions; it needs enough revenue, enough buyers and enough financial channels to keep its economy functioning. Washington can attempt to narrow each of those lifelines, but completely severing them would require cooperation from many countries whose economic interests do not always align with American objectives.
(Source:www.theguardian.com)
The strategy reflects a central reality of sanctions policy: isolating a country is considerably harder than sanctioning it. Iran has spent decades operating under American restrictions and has built commercial relationships that allow it to continue selling oil, importing goods and moving money despite those restrictions. Washington can increase the cost of those activities, but the effectiveness of its campaign will depend on whether it can persuade Iran’s most important trading partners to cooperate.
That makes China the most important test of the policy. It also puts countries such as Turkey, Iraq, the United Arab Emirates, India, Pakistan, Oman and Iran’s smaller regional trading partners in a difficult position. Their economic relationships with Tehran vary substantially, but each illustrates why complete isolation is difficult to achieve.
China Is The Main Economic Lifeline
China is by far the most consequential partner in Iran’s external economy because of its role as the principal buyer of Iranian crude. Data for 2025 indicate that China purchased roughly 1.38 million barrels of Iranian oil per day, accounting for more than 80 percent of Iran’s shipped oil according to commodity tracking estimates. Chinese purchases have therefore become one of the main reasons Tehran has continued to generate significant export revenue despite American sanctions.
The relationship is particularly important because Iranian oil does not necessarily enter China through a straightforward commercial chain. Iranian crude has been moved through intermediaries, complex shipping arrangements and smaller independent refiners that have limited exposure to American markets. Transactions can also be structured in ways designed to reduce the visibility of the Iranian origin of the oil, making enforcement considerably more complicated for Washington.
This explains why the new American strategy could focus increasingly on secondary sanctions. Instead of merely preventing American companies from doing business with Iran, Washington can threaten foreign companies with restrictions if they facilitate transactions that American authorities have prohibited. The purpose is to force businesses to calculate whether access to American finance and markets is worth more than their Iranian commercial relationships.
China, however, is unlikely to respond simply because Washington demands it. Beijing has repeatedly argued that sanctions and economic pressure do not provide a political solution, while its own energy requirements give it an economic incentive to maintain access to discounted Iranian crude. At the same time, China has much larger commercial relationships with other Gulf economies, meaning Beijing has reasons to avoid allowing its relationship with Iran to destabilize its wider regional interests.
Gulf And Regional Trade Creates Other Escape Routes
China may be Iran’s most important oil customer, but it is not the only country that matters to Tehran’s economic survival. The United Arab Emirates has historically been a major commercial gateway for Iranian goods, financial transactions and re-exports. Dubai in particular has long served as an important regional trading centre for businesses dealing with Iran, even though American sanctions have already restricted many Iran-linked financial activities.
The UAE’s relationship with Iran also demonstrates how quickly geopolitical tensions can change economic calculations. Abu Dhabi recently suspended financial and economic transactions with Tehran following a military escalation, according to reporting on the current crisis. That decision could reduce one of Iran’s important regional commercial channels, although the longer-term significance will depend on whether the suspension becomes permanent and how broadly it is enforced.
Iraq presents a different problem for Washington. Economic relations between Iraq and Iran involve not only ordinary trade but also energy. Iraq relies on Iranian natural gas for part of its electricity generation, while bilateral trade has remained substantial. Iraqi officials have warned that additional American sanctions could make it harder for Baghdad to maintain payments for Iranian energy without exposing Iraqi financial institutions to American restrictions.
This creates a practical limit to economic isolation. Washington may be able to pressure Iraq to reduce certain commercial links, but forcing Baghdad to abandon Iranian energy rapidly could create consequences inside Iraq itself. Economic sanctions therefore have to be designed around the difference between trade that supports Iran financially and trade that neighboring countries consider necessary for their own basic economic requirements.
Turkey And Pakistan Complicate The Strategy
Turkey is another important example because its relationship with Iran is based on ordinary commercial and energy interests rather than dependence on Iranian oil alone. The two countries conduct several billion dollars of trade each year, with Turkey importing Iranian natural gas while exporting manufactured products and other goods to Iran. Turkey has historically resisted attempts to completely sever these economic links, particularly when doing so would conflict with its own energy and regional interests.
Pakistan presents an even more complicated case because its economic relationship with Iran includes a significant informal component. The two countries share a long border, and cross-border commerce has historically involved fuel, food, agricultural products, medicines and other goods. Formal bilateral trade has remained below the ambitions of both governments, but unofficial commerce has created an additional channel that is difficult to eliminate through conventional sanctions.
For Washington, these relationships demonstrate that Iran’s economic network is not a single system that can be switched off. Some links are based on oil, others on natural gas, border trade, re-exports or basic consumer requirements. Closing one route can therefore encourage activity to move through another.
India Faces A Different Sanctions Dilemma
India’s relationship with Iran is much smaller than China’s, but it remains strategically significant because New Delhi has historically maintained commercial and connectivity interests involving Iran. Bilateral trade has fallen sharply since the United States intensified sanctions, declining from much higher levels before the renewed American pressure. Recent trade has been dominated by Indian exports, including agricultural and pharmaceutical products.
This distinction matters because not all trade with Iran has the same strategic significance. A policy aimed at blocking oil revenue and financial networks is different from one that restricts food, medicine or other essential goods. Washington can attempt to exempt humanitarian trade, but companies and banks may still become cautious when sanctions rules are complex or penalties are severe.
India therefore illustrates the broader diplomatic challenge facing Washington. The United States can make Iranian trade more difficult without necessarily wanting to eliminate every legitimate commercial transaction. The more expansive the definition of economic support becomes, however, the greater the risk that sanctions begin affecting activities that other countries regard as legitimate and necessary.
Isolation Depends On Closing Networks, Not Borders
The central weakness in any attempt to isolate Iran is that economic isolation does not require Iran to maintain normal relations with the Western financial system. Tehran can survive with a much narrower group of trading partners if those partners are willing to continue doing business. China’s role in Iranian oil exports demonstrates how a single large buyer can become disproportionately important after sanctions reduce the number of legitimate markets available to Tehran.
The experience of the past year also suggests that sanctions can substantially constrain Iran without completely eliminating its energy exports. Despite renewed American maximum-pressure policies, Iran continued sending large volumes of crude to China in 2025. More recent reporting indicates that the war and disruption around the Strait of Hormuz have already altered Iran’s broader trade flows, making it harder to determine how much of the decline is caused by sanctions and how much by the wider conflict.
Trump’s proposed escalation is therefore less about discovering a new economic weapon than about attempting to make existing American financial power more comprehensive. The United States can target banks, insurers, shipping companies, oil traders and intermediaries and can threaten foreign businesses with loss of access to American markets. The more successfully these measures are enforced across countries, the more expensive it becomes for Iran to maintain international commerce.
But the strategy also has a clear limitation. Washington cannot simply order China, Turkey, Iraq, India or other sovereign states to abandon their economic interests. Each country will assess the cost of complying with American demands against the value of maintaining ties with Iran. The success of the isolation campaign will therefore depend not on whether Iran has trading partners, but on whether those partners conclude that doing business with Tehran has become too costly to justify.
That is ultimately the real test of Trump’s strategy. Iran does not need unrestricted access to global trade to withstand sanctions; it needs enough revenue, enough buyers and enough financial channels to keep its economy functioning. Washington can attempt to narrow each of those lifelines, but completely severing them would require cooperation from many countries whose economic interests do not always align with American objectives.
(Source:www.theguardian.com)
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