The $1 toll and the $13 war: Iran's Hormuz fee is a rounding error, its friend-pricing is not

On July 4, at the World Peace Forum in Beijing, Iran's ambassador to China delivered the clearest statement yet of what Tehran intends to build in the world's most important oil chokepointchokepointA narrow passage that a large share of world trade must physically squeeze through, making it a point of leverage.. 'As a country where the Hormuz is part of its territorial waters, we will definitely charge service fees,' Abdolreza Rahmani Fazli said, fees, he explained, for 'guaranteeing the security of passage,' for 'supervision of the passage of the vessels,' and for 'dealing with the environmental consequences.' Then came the part that was not about money at all: 'We will definitely consider special treatment for the countries that were friendly to us and specially stood by us during the hard times.' Bloomberg's headline distilled the message for his hosts: Beijing, which buys almost all of Iran's oil exports, is to get concessions. The scheme, Fazli added, is being built in 'collaboration and cooperation' with Oman, the strait's other shore.

The oil market's response was close to nothing. Brent crudeBrent crudeThe world's most-watched oil price benchmark, quoted in dollars per barrel., the global benchmark price for oil, held near $72 a barrelbarrelThe standard unit for oil, equal to 42 US gallons or about 159 litres. into the July 4 weekend, almost exactly where it traded before the war that began in late February, closed the strait, and pushed the price as high as about $126. By the headline number, the war has fully round-tripped: the premium came, the premium went, everything is back to normal.

This article is about what that headline number cannot see.

The narrow question: is the market right to price a permanent Hormuz fee at roughly zero? And if the fee really is economically trivial, as our arithmetic below suggests, is its discriminatory structure, the 'special treatment' part, the piece that actually moves money?

The sequence matters, because the fee is not a proposal, it is a wartime practice Iran is trying to make permanent. The war began on February 28 with coordinated US and Israeli airstrikes on Iran; on March 4 Tehran declared the Strait of HormuzStrait of HormuzThe narrow sea passage between Iran and Oman through which about a fifth of the world's oil leaves the Persian Gulf. closed, and Brent crossed $100 four days later. From mid-March, Iran's Revolutionary Guard actually collected transit charges, up to $2 million per loaded supertanker, which works out to $0.50 to $1.00 per barrel on a two-million-barrel ship. Payment was taken in Chinese yuan routed through a Chinese bank connection outside the Western payments system, or in bitcoin and possibly the dollar-pegged stablecoinstablecoinA cryptocurrency designed to hold a fixed value, usually one US dollar; Iran's toll system reportedly accepted the stablecoin USDT alongside bitcoin and Chinese yuan. USDT, deliberately beyond the reach of US sanctions. The blockchain analytics firm TRM Labs, which documented the system, reports that Iran codified it on March 30-31 as the 'Strait of Hormuz Management Plan,' complete with a five-tier ranking of nationalities: friendlier nations paid lower rates, and ships linked to the US or Israel were denied passage entirely.

The ceasefire that ended the war, the 14-point Islamabad Memorandum signed by Presidents Trump and Pezeshkian on June 17, reopened the strait to commercial shipping 'with no charge for 60 days only,' after which, in the US account of the unreleased text, 'future administration and maritime services' are to be determined by Iran along with Oman and other Gulf states. The US lifted its naval blockade of Iranian ports on June 18, starting the clock; 60 days from the signing runs out around August 16. Remarkably, the two sides publicly dispute what their own document means after that: Tehran says it and Oman hold joint sovereignty and will charge for passage, while Washington insists any new arrangement in an international waterway needs the Gulf states' endorsement. Secretary of State Marco Rubio, speaking in Abu Dhabi on June 24, was categorical: 'No country is allowed to charge tolls or fees on an international waterway', existing international law, in his telling. Negotiators reconvened in Doha on July 1 with the strait fee near the top of the agenda; Axios reports the American pitch is that the money Iran could make selling oil freely under a nuclear deal 'would be 100 times more valuable to them than using a gangster tactic to try and charge a toll,' as one US official put it. Fazli's Beijing speech landed three days into those talks.

Start with what the war actually cost shippers, because that is the yardstick the fee should be measured against. The benchmark rate for shipping crude from the Gulf to China, a Baltic Exchange series called TD3CTD3CThe Baltic Exchange's benchmark shipping rate for moving crude oil on the Persian Gulf-to-China route, published daily from shipbroker assessments., printed $462,102 per day on May 11, its highest reading since at least 2008. Spread over a supertanker's two million barrels, that implies roughly $18 per barrel. One caution, flagged at the time by the freight analytics firm Fairway ETA: with the strait shut, the index was partly pricing a route almost nobody was sailing, and real, signed deals, fixtures, cleared closer to $13 per barrel. Either number dwarfs peacetime: a Suez Canal transit, the world's benchmark for what ships pay to use a waterway, costs a large crude carrier roughly $800,000, or about $0.40 per barrel.

Against that yardstick, Iran's fee is small. At the top of its own wartime range, $1 per barrel is less than a tenth of what real war-peak freight cost, and about two and a half Suez tolls. On a $72 barrel it is a 1.4% surcharge. Even the total is modest by the standards of the stakes: charge every one of the roughly 20 million barrels that transit each day the full dollar, every day for a year, and Iran collects about $7.3 billion, a ceiling, not a forecast, since it assumes no exemptions, no evasion and no lost traffic. TRM Labs' wartime estimate of up to $20 million a day from oil tankers annualizes to the same order of magnitude.

This is why the market shrug is, on one level, rational. Brent went from about $72 before the war to about $126 at the peak and back to $72.3 by the July 3 close. If the only question is 'does a $1 toll change the world price of oil,' the answer is: barely. And Washington's negotiating logic in Doha rests on the same arithmetic, sanctions relief is worth far more to Tehran than the tollbooth. On revenue, everyone agrees the fee is small. Which is exactly why revenue is probably not the point.

To see what a friend-priced toll does, look at the market that already ran the experiment: war-risk insurance. Before the war, insuring a tanker's hull against war damage for a Gulf transit cost around 0.125% to 0.15% of the ship's value. During the crisis, the market split. Typical transits fetched around 2.5% of hull valuehull valueThe insured value of the ship itself, used as the base for calculating war-risk insurance.; tankers with US, UK or Israeli connections, nicknamed 'missile magnets' in Lloyd's List's reporting, paid up to 5%; and the best neutral risks, with a no-claims bonusno-claims bonusA discount an insurer gives a customer who has not filed claims, during the war, the best-behaved neutral tankers used it to cut their war-risk rate., got through for about 0.8%. Same strait, same water, same week: a spread of more than six to one, keyed not to seamanship but to politics.

In dollars, that spread was enormous. At 5% of hull value, a single supertanker transit carried an insurance bill in the range of $5 million to $7.5 million, $2.50 to $3.75 per barrel, rivaling the freight itself, and Lloyd's List reported Gulf war-risk premiums 'topping double-digit millions of dollars per trip' at the extreme. The insurance market invented, under fire and in real time, precisely the instrument Fazli described in Beijing: a price for the same passage that depends on whose ship you are.

The difference is that the insurers' version was temporary and priced actual risk, missiles really were likelier to hit some ships than others. Iran's version writes the tiers into a standing tariff after the shooting stops. The wartime toll already worked this way: TRM Labs documented a five-tier nationality ranking, discounts for friends, and outright denial for US and Israel-linked vessels. 'Special treatment' for friends is the same structure with a diplomatic bow on it. That is not a revenue tool. It is a sanctions regime in reverse, the power to price access to the world's main oil artery by political alignment, collected in currencies Washington cannot freeze.

And here is the part that matters for anyone watching markets: an average price cannot detect this. Brent is one number for the whole world. A discriminatory toll barely moves the average, it moves the gaps. The fingerprint to watch for after mid-August is dispersion: freight quotes, insurance rates and effective tolls diverging for identical voyages depending on flag and beneficial ownershipbeneficial ownershipThe person or company that ultimately owns and profits from a ship, regardless of which country's flag it flies.. That is a two-tier oil market being born, and it will be invisible on the price screen your pension manager watches.

A toll is only as strong as the alternatives are weak. The US Energy Information Administration counts about 20 million barrels a day of crude, condensate and refined products moving through Hormuz in 2024, roughly 20% of everything the world consumes, plus about a fifth of global liquefied natural gas trade, mostly from Qatar. The only ways around are two pipelines: Saudi Arabia's 5-million-barrel East-West line to the Red Sea and the UAE's 1.8-million-barrel line to Fujairah, which between them have only about 2.6 million barrels a day of spare capacity. Roughly seven of every eight barrels have no alternative to paying whatever the strait charges.

History offers exactly one example of a durable toll on a natural strait, and it is worth taking seriously. From 1429 to 1857, 428 years, Denmark charged the Sound DuesSound DuesThe toll Denmark charged ships entering the Baltic Sea from 1429 to 1857, history's most durable strait toll, ended when maritime nations collectively paid Denmark to abolish it under the Copenhagen Convention. on every ship entering or leaving the Baltic Sea, a toll that at its height supplied up to two-thirds of the Danish state's income. It ended not because anyone sailed around it but because the maritime nations collectively bought it out: the Copenhagen Convention of 1857 abolished the dues in exchange for a one-time payment of 33.5 million rigsdaler, the Danish currency of the day, and declared the Danish straits free to all commercial shipping. That settlement helped establish the principle Rubio invoked in Abu Dhabi.

The legal terrain today is messier than either side admits. The UN Convention on the Law of the Sea says transit passage through straits used for international navigation 'shall not be impeded' and that ships may be charged only for specific services actually rendered, which is exactly why Fazli frames the levy as payment for security, supervision and environmental services rather than a toll. But Iran has signed and never ratified UNCLOSUNCLOSThe United Nations Convention on the Law of the Sea, the treaty governing shipping rights; it says passage through straits used for international navigation must not be impeded, and ships may only be charged for specific services actually rendered., and the United States has never joined it at all, so both governments are arguing from a treaty neither is fully party to. A standing, politically tiered per-barrel charge on a natural strait would have no modern precedent, which is different from saying no one will pay it. Denmark's lesson cuts both ways: a toll priced low enough gets paid for centuries, and ending one costs the world's shippers a lump sum.

The next six weeks decide this. Around August 16 the Islamabad MemorandumIslamabad MemorandumThe 14-point ceasefire framework President Trump and Iran's President Pezeshkian signed on June 17, 2026, which reopened the strait toll-free for 60 days.'s toll-free window lapses. Between now and then, watch three things. First, Doha: if the fee is traded away for sanctions reliefsanctions reliefThe lifting of economic penalties (like bans on selling oil or using banks), which Washington argues is worth far more to Iran than any toll revenue., this becomes a footnote of the war, and the market's shrug was right in full. Second, the schedule: if Iran and Oman publish a flat, equal-for-everyone fee near $1 per barrel, it is a Suez-style service charge, irritating, legal-ish, economically trivial, and our discrimination thesis dies. If the published schedule has tiers, or if no schedule appears but 'special treatment' does, the wartime five-tier system has become peacetime policy. Third, dispersion: quotes for the same voyage splitting by flag in the freight and insurance markets, which is where a two-tier strait will show up long before it shows up in Brent.

No country is allowed to charge tolls or fees on an international waterway.

The oil price says the war is over and the toll is nothing. On the first point it is right. On the second, it is measuring the wrong thing: the fee was never the payload. The discount is.