The Panama Canal’s “NetZero Slot” initiative, designed for low-emission vessels, will create a clear market incentive for shipping companies investing in greener technologies by reserving weekly transit capacity for ships meeting strict environmental criteria.
Starting October 3, the Canal will begin awarding these special transit slots, with the first implementation covering the transit week of November 2-8, 2025. Unlike the auction system used for regular slots, the NetZero quota will be allocated through a competitive priority system that rewards more environmentally friendly vessels.
“The NetZero Slot is a clear indicator of our commitment to the sustainability and competitiveness of world trade. Through this effort, we aim to accompany our customers in the transition towards a low-emission future,” said Ilya Espino de Marotta, Deputy Administrator of the Panama Canal and Sustainability Officer.
In the initial phase, eligible vessels must be registered as dual-fuel and capable of operating with at least one fuel with a carbon intensity factor equal to or less than 75 /MJ. Eligible alternative fuels include green methanol, green ammonia, bio-LNG, or bio-LPG. Although vessels will not initially be required to use these fuels during transit, the Canal is recognizing the investment and capacity to use cleaner fuels as supply becomes more widespread.
Ships competing for a NetZero Slot will be evaluated based on three criteria. These are; loaded vessels will have priority over ballast vessels, vessels with a higher PC/UMS tonnage will have priority, and in case of a tie, past economic contributions through transit fees and services will be considered.
Vessels granted special transit rights will benefit from significant operational advantages such as a 24-hour guaranteed transit, selection of transit date within the assigned week, inclusion of Just-in-Time service, and flexibility to exchange or substitute with vessels of equivalent characteristics.
This initiative aligns with the Panama Canal’s commitment to achieve net-zero emissions by 2050, while also actively contributing to the energy transition of maritime transport.
