Trump's Hormuz Toll Demand Sends Crude to One-Month High
A proposed 20% U.S. transit charge — sixteen times Iran's own levy — drove oil's sharpest single-session rally since April, but shipping markets have yet to see a viable enforcement plan.
West Texas Intermediate crude futures surged 9.4% on Monday (2026-07-13) to settle near $78 a barrel, the highest close in nearly a month, after President Donald Trump announced on social media that Washington would impose a 20% charge on all cargo transiting the Strait of Hormuz and declare the United States its "guardian." ICE Brent crude front-month closed above $83 in the same session. At current oil prices, a 20% charge on a fully laden supertanker works out to roughly $32 million per voyage.5
People familiar with the Iran transit situation have said Tehran's own tolls on commercial ships reached as much as $2 million per vessel. The U.S. figure, as described by Trump, would be sixteen times that amount and would apply to all cargo, not just oil.5
The reaction in shipping markets on Monday (2026-07-13) was more cautious than the crude price move implied. More than ten people involved in shipping, including senior brokers, told reporters they were waiting to see how the fee would actually be implemented, who would bear the cost, and how Gulf producers dependent on Hormuz access would respond. Those questions are not peripheral details.5
The strait carries a fifth of the world's oil supply, and its closure or restriction has already stripped more than one billion barrels from global markets since the conflict began, according to ADNOC chief Sultan Ahmed Al Jaber, who spoke on Wednesday (2026-05-20). Nearly 100 million additional barrels are lost for every week Hormuz remains inaccessible. Even if hostilities ceased immediately, Al Jaber said it would take at least four months to ramp flows back to 80% of normal levels, in part because the UAE's existing Fujairah bypass pipeline — with a maximum capacity of 1.8 million barrels per day — cannot absorb the full volume, and a second bypass pipeline is only roughly half-built.2
Iran's toll-charging period illustrated why the strait is so difficult to manage diplomatically. A Poten & Partners executive told Montel that Tehran had little incentive to reach a swift peace deal with Washington while its grip on the waterway continued to shape global energy flows. Trump's move effectively mirrors that logic: rather than waiting for a negotiated reopening, Washington is positioning itself as the waterway's controller and monetising access.1,6
Marine war risk insurance rates reflect the accumulated uncertainty. Marcus Baker, global head of marine at Marsh, the world's largest broker, said rates had climbed to between 2% and 6% of vessel value as of the week of July 9 (2026-07-09), up from a fraction of a percent before the conflict erupted. At the upper end of that range, a $100 million oil tanker would cost $6 million to insure for a single Hormuz transit, though large no-claims discounts can reduce headline rates substantially. Earlier in the conflict, some vessels were charged as much as 10% of their value. Rates had begun drifting back below 2% before the latest exchange of attacks.4
Morgan Stanley warned in a late-May note that the oil market was in "a race against time" as demand continued drawing down the supply buffers that had kept a lid on prices. Analysts including Martijn Rats noted that despite a loss of close to one billion barrels, futures had failed to top 2022 highs partly because investors kept expecting the strait to reopen. A U.S. toll regime does not reopen the waterway. It installs a different gatekeeper.3,6
ICE Brent crude front-month was trading at $84.77 in early Asian trade on Tuesday (2026-07-14), holding the bulk of Monday's (2026-07-13) gains. NYMEX WTI front-month was at $79.98, up another 0.9% from Monday's (2026-07-13) settlement.5
The central uncertainty is whether the toll will function as a revenue mechanism, a pressure tactic, or simply a negotiating position that quietly disappears. Saudi Arabia, Kuwait, and the UAE ship the bulk of their exports through Hormuz; a 20% levy on cargo value would represent a substantial tax on their revenues and would almost certainly prompt bilateral negotiations Washington has not yet publicly signaled. How those producers respond, and whether the U.S. Navy has both the legal basis and the logistics to enforce collection on international waters, will determine whether Monday's (2026-07-13) rally was a genuine re-pricing of Hormuz risk or the oil market reacting to a social media post.5,2