FX repatriation and the exporter's arithmetic. This driver gets the least attention and may matter most. Exporters are required to supply the foreign currency earned from exports through the Nima system at a rate below the market. One exporter told Ensaf News that currency they paid 5 percent to obtain must be supplied at 35,000 to 38,000 tomans below the market rate, and that while sanctions make repatriating the currency impossible, tax is still levied on nominally tax-exempt exports because the repatriation obligation was not discharged. Now do the arithmetic: Negin grade trades domestically at roughly 105 to 110 million tomans per kilo, which at the free-market dollar rate of 186,500 tomans on 26 July 2026 equals $563 to $590. Gholamreza Miri, head of the Saffron Exporters Union, puts the cost of official export at 20 to 25 million tomans per kilo, or $107 to $134 at the same rate. Selling at $862, what remains before all other costs is roughly $138 to $192 per kilo. On that margin the official route does not pay for many, and that is the logic that has driven exports underground: official exports fell from 325 tonnes in 1399 (2020/21) to about 223 tonnes in 1402 and 1403, and Miri estimates smuggling at around 10 tonnes a month.