For the first time in history, Iran has spent roughly seven weeks without shipping any large quantities of crude oil through the Strait of Hormuz. The naval blockade launched by the United States on April 13, 2026, has choked off one of the country’s primary sources of foreign currency, causing oil exports to plummet near zero and triggering an estimated $6 billion in lost revenue.
How a Naval Blockade Succeeded Where Years of Sanctions Failed
For years, Washington attempted to squeeze Iran’s energy revenue through traditional economic measures via maximum pressure campaigns and sanctions. Tehran routinely bypassed those restrictions by deploying a shadow fleet of aging tankers, rerouting shipments, and finding willing buyers. That workaround kept exports regularly topping 1.3 million barrels per day even under maximum pressure campaigns.
According to analytics firms Kpler, Vortexa, and Tanker Trackers, Iran did not successfully export any oil shipments to China via the Strait of Hormuz since the United States re-imposed its blockade in the ongoing conflict. Analyst Claire Youngman of Vortexa noted that even at the height of maximum pressure sanctions in 2019 and 2020, some crude oil passed through the strait every month, and outbound flows never dropped near zero for a prolonged period like they have since mid-July.
The impact was immediate and severe. In the months before the blockade, Iran exported between 1.3 million and 1.9 million barrels per day. By May, export figures cratered, with Vortexa pegging the volume at 209,000 barrels per day and Kpler estimating 260,000 barrels per day. Not a single crude oil shipment successfully passed the blockade during May, with only small movements of roughly 2 million barrels of naphtha and limited liquefied petroleum gas.
Billions in Lost Revenue and Stranded Crude Inventories
The financial toll on Tehran has been staggering. Iran’s estimated revenue loss from the blockade totaled nearly $6 billion across April and May combined. For context, the country earned roughly $5.13 billion from oil exports in March alone, which was the last full month before the blockade took effect. By early June, between 67 and 80 million barrels of Iranian oil sat stranded, either trapped inside the blockade perimeter or floating in storage tankers with nowhere to go. Analysts warned that if storage capacity limits are reached, Iran may be forced to cut production entirely because there would be nowhere to put the crude emerging from the ground.
China, which had absorbed the bulk of Iran’s discounted oil for years, has been cut off from direct shipments as Washington threatens to immediately penalize any nation trading with Iran. Following a brief memorandum of understanding between the United States and Iran in mid-June 2026 that temporarily lifted restrictions, limitations were renewed in July, leading Iran’s central bank to acknowledge by August that oil export revenues had dropped to zero.
Economic Strain and Counterclaims from Tehran
The International Monetary Fund projects Iran’s inflation rate to reach about 70 percent this year, marking the third highest rate globally after Venezuela and Sudan. The economic squeeze may force Tehran to finance government spending through currency printing, further threatening higher inflation.
Despite these figures, Supreme National Security Council head Mohsen Rezaee disputed the narrative during an interview with the Islamic Republic of Iran Broadcasting station, claiming that Iran made billions of dollars despite sanctions and the blockade, stating that in the past month or two, they sold seventy million barrels of oil, and adding that now every day they sell oil to American ships on that side, as much as they produce.
Rezaee accused the United States and Israel of intentionally fostering regional conflicts to sell weaponry, stating that Iran has no interest in war and asking whether they would have gone to three negotiations with the Americans if they were warmongers. He further claimed that the Strait of Hormuz is currently closed and will only reopen if the United States fulfills its obligations. Warning other nations against participating in the U.S. economic war, Rezaee threatened retaliation against foreign interests, stating that they hold a meeting, tell them to go and separate their ranks from America, and if they don’t act, they will strike and strike the interests of the country.
