President Trump announced on July 13, 2026, that the U.S. will reinstate a naval blockade on Iran, preventing ships from entering or leaving Iranian ports. The blockade is set to take effect on July 14 at 4 PM ET. Trump stated that the U.S. would seek reimbursement at a rate of 20% for ensuring safe passage for cargo ships, although details of this initiative remain unclear.
The blockade follows recent clashes between the U.S. and Iran and is expected to escalate tensions in the Strait of Hormuz, impacting shipping economics in the region. This move represents a further breakdown of the U.S.-Iran memorandum of understanding, which Trump declared over after the Islamic Revolutionary Guard Corps (IRGC) resumed attacks on commercial vessels.
A U.S. defense official indicated that additional military actions are planned in the Hormuz area to degrade the IRGC's capabilities. The U.S. Navy stated that the blockade will encompass all Iranian ports and coastal areas, applying to all vessel traffic, regardless of flag. Any vessel suspected of violating the blockade may face interception or capture.
Transit of ships to non-Iranian destinations will not be impeded, and humanitarian shipments will be allowed to reach Iranian ports, subject to inspection. Iranian Foreign Minister Abbas Araghchi responded to Trump's announcement by asserting Iran's role as the guardian of the Strait and suggesting that compensation for safe passage should be negotiated. He stated that 20% is excessive but expressed willingness to be fair in discussions.