A comparison with Turkey’s Bosphorus toll system suggests that Iran could generate substantial revenue by imposing maritime service fees on vessels transiting the Strait of Hormuz. Turkey charges about $5.83 per net tonnage, yielding roughly $220 million a year. Applying a similar rate to the larger ships that use the Hormuz Strait—averaging 80,000‑100,000 net tons and 35,000‑40,000 crossings annually—could bring Iran $16‑20 billion each year, even without additional tolls. If Iran also became the primary insurer for these passages, the revenue could increase further.