War-Risk Insurance for Tankers in the Strait of Hormuz Jumps Again as U.S.-Iran Fighting Resumes

Insurers Reprice a War That Never Really Stopped

The cost of insuring a single tanker voyage through the Strait of Hormuz has jumped again, after a mid-July collapse of the ceasefire between the United States and Iran reignited the danger that has hung over the waterway since late February. Marine underwriters in the Lloyd's of London market are now quoting war-risk premiums of roughly 3% to 10% of a ship's hull value for one transit, up from about 0.25% before the fighting began — a jump that turns what used to be a $250,000 line item into a bill running from several million dollars to as much as $10 million to $14 million for the largest crude carriers^[1][3]. Because the strait carries something like a fifth to a quarter of the world's seaborne oil, that shipping-cost spike feeds almost directly into the price of crude everywhere else^[2][5].

The renewed surge traces to a specific breakdown. A June 17 truce had pushed oil prices back toward pre-war levels, but it fell apart around July 8 after Iran struck several commercial vessels in the Gulf, including two UAE-flagged supertankers, the Mombasa and the Al Bahyah — an attack that killed one sailor and injured eight others^[5][2][11]. President Trump declared the ceasefire "over," and the exchange of fire between the U.S. and Iran around the strait resumed^[5][2]. Tanker traffic has thinned dramatically as a result: on one recent 12-hour stretch, as few as six ships crossed the strait, against a pre-war norm of roughly 130 vessels a day^[2]. Brent crude has settled near $78-79 a barrel — well below the roughly $120 peak hit during the worst of the war, but still about 9% above where it traded before the fighting started^[5].

What Isn't in Dispute

Certain facts here are not contested by any side. The Strait of Hormuz is only about 21 miles wide at its narrowest point and has no full substitute route, which is precisely why it functions as global chokepoint and geopolitical lever at once^[2][6]. The war began on February 28, 2026, when the U.S. and Israel launched airstrikes on Iran, and Iran responded within days by declaring the strait closed^[11][2]. By March 3, Lloyd's Joint War Committee had added the entire Persian Gulf and adjacent waters to its high-risk "Listed Areas," and Protection & Indemnity clubs withdrew standard war-risk cover in the region within 72 hours^[3].

The insurance numbers themselves are also settled record: premiums for Hormuz transits have risen from about a quarter of a percent of hull value before the war to a range widely quoted at 3% to 10%, with roughly 5% cited as a current market norm^[1][3]. On July 13, Trump announced that the U.S. would act as "guardian" of the strait, reimpose a naval blockade of Iranian ports, and charge a 20% toll on cargo passing through — then withdrew the toll proposal the very next day, after the International Maritime Organization called it illegal and Gulf leaders raised objections with him directly, saying Gulf states would instead pursue "Trade and Investment Deals" with Washington. The blockade of Iranian ports has continued regardless^[9][10][13]. Separately, Lloyd's welcomed a new Chubb-led marine war-risk consortium on June 19, aimed at adding fresh insurance capacity for Hormuz shipping^[12].

The Mechanics Nobody Controls

Underneath the politics sits a market mechanism that runs on its own logic. War-risk underwriters are pricing the probability of a total loss on a tanker worth $100 million or more; once missile and mine attacks become observable and real, premiums rise to whatever level keeps expected payouts covered, independent of what any government says^[3][4]. The Lloyd's Market Association has stated plainly that the collapse in vessel traffic reflects safety judgments by crews and owners, not a shortage of available cover — in its telling, insurance capacity for the region has held up even as the price of that capacity has climbed twelvefold to fortyfold^[4].

That pricing reality intersects with a second structural fact: Gulf oil exporters are not entirely at the strait's mercy. Saudi Arabia's East-West pipeline and the UAE's Fujairah terminal can reroute part of the region's crude around Hormuz entirely, which caps — without eliminating — Iran's ability to use the strait as economic leverage^[6]. The roughly 20 million barrels a day that normally move through the strait cannot be fully absorbed by those bypass routes, so the physical danger still shows up as higher delivered oil costs even as some cargo finds another way through^{[1][2][5][6][11]}.

How Each Side Reads the Same Facts

Washington frames itself as the force keeping the strait open at all, arguing that U.S. naval power is the reason any tanker moves through the region. On that basis, Trump argued that nations benefiting from American protection should help underwrite its cost, proposing the 20% transit toll on July 13 — before dropping it a day later amid the IMO's legal objections and pressure from Gulf leaders, saying Gulf states would instead pursue investment deals with the U.S. while the blockade of Iranian ports continued^[6][9][13]. U.S. officials contend that Iran's leverage is fading as Gulf allies reroute crude, making the short-term price and insurance shock a manageable cost of pressuring Tehran^[6][9].

Iran casts itself in the opposite role: the strait's rightful and historical guardian, provoked into action by U.S. and Israeli strikes it did not start. Tehran has rejected the now-withdrawn U.S. toll as an illegal shakedown of a waterway that international law is meant to keep open to all, while signaling it would accept fair compensation for guaranteeing safe passage^[7][8]. Iranian officials argue their responses demonstrate an ability to raise the cost of the war for the U.S. and its allies and to expose divisions between Washington and Gulf states worried about economic fallout^[7][8].

Marine insurers, for their part, insist they are simply pricing danger, not profiting from crisis — premiums reflect the real odds of a missile or mine strike on a nine-figure asset, and the London market's willingness to keep offering cover, however expensive, is what allows any oil to move at all^[3][4][12]. Shipowners, Gulf exporters, and oil-consuming economies occupy the more exposed middle ground: tanker charterers now face millions of dollars in added cost per voyage, consumers saw gasoline prices spike toward $4 a gallon at the war's peak, and the International Energy Agency has described the episode as one of the greatest global energy-security challenges on record^[5][6][11].

How the Coverage Diverged

Outlets covering the same set of facts have told noticeably different stories. Fox News emphasized that "Iran's biggest weapon against the US may be slipping away," stressing Saudi and UAE bypass capacity and rising U.S. output as evidence that renewed attacks reflect Iranian weakness rather than strength^[6]. NPR and other center-left business coverage instead centered the domestic economic toll — inflation, gas prices, pressure on the Federal Reserve — treating the conflict primarily as a risk to be managed and implicitly questioning its economic wisdom.

Al Jazeera's reporting sequenced events starting from U.S. and Israeli strikes and gave prominent space to Iran's "guardian" framing and its objections to the toll, describing the exchange as both sides trading attacks^[5][7]. Iran's own state media, Press TV, adopted Tehran's position more directly still, casting Iran as the strait's "eternal guardian" against what it called an excessive U.S. toll, while omitting Iran's own strikes on civilian tankers and the sailor killed in them^[8]. By contrast, trade and business press — CNBC, Lloyd's List — stuck close to prices, tolls, and traffic data with comparatively little political framing, treating the story as a market and policy problem to be quantified rather than argued over^[3][9]. Across that spread, the most consistently technical sources — the Joint War Committee, Lloyd's List, and the IMO — offered numbers and legal readings that both political sides drew on selectively to support their own case.