Former President Donald Trump announced on April 22, 2025, from his campaign headquarters that the United States will impose a 20-percent toll on all cargo passing through the Strait of Hormuz and restart a naval blockade against Iran. The policy is designed to pressure Tehran over its nuclear program and regional activities.
The strait, a narrow waterway connecting the Persian Gulf to the Gulf of Oman, is the only sea passage from the Persian Gulf to the open ocean and has long been one of the world’s most strategically important chokepoints. In 2023, roughly 21 million barrels of oil—about 20 percent of global consumption—transited the strait daily. The new U.S. toll applies to all cargo, not just oil, and the naval blockade mirrors the 2019–2020 maximum pressure campaign under the Trump administration.
Strategic Chokepoint and Historical Context
The Strait of Hormuz lies between Iran on its north coast and the Musandam Peninsula, part of Oman with a small portion belonging to the United Arab Emirates, on its south coast. For decades, it has been a critical route for global seaborne oil trade and a major corridor for liquefied natural gas moving toward Europe and Asia.
Several Gulf countries have no other maritime outlet for their exports, meaning any disruption can cause severe supply shortages. Iran has periodically threatened to close the strait during confrontations with the United States and its allies—during the Iran-Iraq War from 1980 to 1988, both sides attacked shipping in the area, and in 2019 after U.S. drone strikes, Iran again warned it might block the waterway. Despite these threats, the strait had not been closed for any extended time during Middle East conflicts before more recent events.
The new U.S. policy heightens military tension in a region already dealing with nuclear negotiations and shifting alliances. The announcement comes amid ongoing negotiations in Vienna over the Joint Comprehensive Plan of Action, from which the United States withdrew in 2018.
Human and Economic Dimensions
The sailors and crews of the U.S. Navy’s Fifth Fleet, based in Bahrain, will be tasked with enforcing the blockade. This returns them to the tense patrols of the 2019–2020 maximum pressure campaign. On the other side, Iran’s Islamic Revolutionary Guard Corps is a key stakeholder in the confrontation, and the people of Iran face potential consequences from any escalation.
The policy directly affects energy costs for millions of people. Oil-dependent nations such as Japan, India, and South Korea rely heavily on the strait for their petroleum supplies.
Any change in shipping through the waterway can raise prices at the pump and increase heating costs for households in those countries. On April 21, 2025, the price of Brent crude stood at $85 per barrel. The new 20-percent toll could further raise global oil prices.
For readers, the outcome of this standoff could show up in monthly energy bills and in the stability of global fuel markets. No further details on implementation or international reaction have been released.
