The United States has announced plans to impose what its Treasury chief described as some of the “toughest sanctions in history” against Iran. The new measures are part of Washington’s wider effort to put economic pressure on Tehran and reduce its ability to support activities that the US considers a threat to regional security.
Speaking on August 20, 2026, the US Treasury chief said the sanctions would have a major impact on Iran’s economy. According to the official, strong economic pressure could reduce the need for large-scale military action against Iran.
The announcement follows earlier warnings from US President Donald Trump, who has threatened what he described as “economic warfare” against Iran. Trump has also warned other countries that they could face economic consequences if they provide support or assistance to Tehran.
The planned sanctions are expected to target important parts of Iran’s economy and financial system. The US aims to make it more difficult for Iran to access international funds, conduct financial transactions and maintain economic links with other countries.
Washington is also calling on its allies and China to support the campaign. US officials want other countries to reduce their economic cooperation with Iran and help prevent Tehran from finding alternative ways to move money and conduct international trade.
The US government has said its goal is to put Tehran under strong financial pressure. By limiting Iran’s access to international markets and financial networks, Washington hopes to weaken the Iranian government’s ability to fund its activities.
The announcement marks another major step in the long-running tensions between the United States and Iran. The two countries have had serious disagreements over Iran’s regional activities, nuclear programme and support for armed groups in the Middle East.
US officials believe that economic pressure can force Iran to change its policies without the need for a major military operation. However, Iran has repeatedly criticised US sanctions and has argued that such measures unfairly target the Iranian people and economy.
The impact of the new sanctions could extend beyond Iran. Businesses, banks and countries that continue to trade with Tehran could face pressure from Washington. This could make international companies more cautious about doing business with Iran.
The US administration is now seeking wider international support for its campaign. If more countries cooperate with Washington, the economic pressure on Iran could increase significantly.
The latest announcement shows that the US is placing economic measures at the centre of its strategy toward Iran. Washington hopes that strong financial pressure will isolate Tehran and force changes in its policies, while avoiding the need for a major military conflict.