Shipping-industry specialist outlet based in Athens; provided the transit-cost calculation for a 10,000-net-tonne vessel and placed the 2026 increase in the context of a multi-year trend of cumulative fee growth

Calculated total per-transit cost at approximately $25,000 for a 10,000-net-tonne vessel (up from $21,750). Noted that cumulative Montreux indexation increases since 2020 have made the Bosphorus one of the most expensive chokepoint transits globally for bulk carriers. Flagged BIMCO's formal concerns about the pace of increases and their impact on Black Sea grain and ore trade.

“Cumulative indexation increases since 2020 have made the Bosphorus one of the most expensive strait transits globally, with the 2026 increase adding roughly $3,250 per 10,000-tonne passage.”