Iran’s 7% Hormuz Toll Seen Raising $136bn a Year

Iran’s proposed 7% transit fee for ships passing through the Strait of Hormuz could generate about $136 billion per year, according to an estimate cited in reporting. The calculation would amount to roughly one-third of Iran’s GDP, based on the same estimate.

A reaction from relevant parties had not yet been reflected in the reporting, leaving the immediate policy direction unclear. The proposal is framed as a potentially significant new source of state income for Tehran if it were to be adopted and implemented.

How the $136 billion estimate was derived

The estimate applies a 7% levy to current seaborne oil and petroleum product transits through the Strait of Hormuz. On that basis, the annual revenue figure comes out to about $136 billion, the analysis said.

The same analysis described that scale of income as large enough to exceed the yearly revenues of several leading global companies. It also characterized the levy as a material new stream of government revenue, if collected as proposed.

Potential cost effects for shipping and oil markets

Analysts said the proposed fee would increase shipping costs for routes that rely on the chokepoint. They added that if shipowners and shippers pass the extra charge along, it could feed into higher freight rates and higher insurance premiums.

Analysts also said a transit fee could add a risk premium to crude pricing, depending on how the cost is transmitted through the supply chain. In that framing, the proposal has direct implications for oil markets and for the economics of seaborne flows that cross the strait.

Officials also warned that such a measure would test international navigation norms. The reporting added that the positions of states that depend on unimpeded passage through the waterway would be a key factor to watch.

Enforcement remains a central uncertainty

Observers said core operational questions are unresolved, including how any levy would be collected and which parties would be charged. Those enforcement mechanics were described as undefined, making implementation risk a central uncertainty.

Markets are expected to monitor whether Tehran moves to formalize the fee within four weeks, by September 7, 2026. Analysts said that if the proposal advances, traders would likely reprice tanker freight and oil risk premia ahead of any implementation.