How a 20% Toll at the Strait of Hormuz Could Raise Shipping Costs

President Donald Trump announced on July 13, 2026, that the United States will reinstate a naval blockade of Iranian shipping and will collect a 20% payment on cargo that transits the Strait of Hormuz. He said the United States would be known as "the guardian of the strait" and that the charge would reimburse the country for the cost of providing security. The move was presented as a way to keep energy lanes open while denying Iran control of the passage.

The International Maritime Organization has reaffirmed that transit through straits used for international navigation should remain free of mandatory tolls, and the agency has rejected charges for passage through Hormuz. The strait is a narrow channel between Iran and Oman that handles roughly 20% of global oil flows, so any disruption or extra cost can ripple through world energy markets and freight rates.

Insurance markets and shipowners have already tightened cover and adjusted routes: some vessels are being diverted around the Cape of Good Hope, adding days at sea and more fuel consumption. War‑risk premiums and special surcharges have increased, and industry analysts warn that the combined effect of a 20% toll, higher insurance and longer voyages could more than double the transport cost for certain oil cargoes. Consequently, refiners and importers would face higher freight bills, and those costs would likely be passed along to consumers in the form of higher fuel and goods prices.

If the fee is applied unevenly, market distortions could follow and regional trade patterns may shift. Moreover, logistical bottlenecks and longer transit times would complicate supply chain planning while firms seek contractual remedies and new insurance arrangements.