December 2, 2025. Maritime transport in Spain is at a crucial crossroads: decarbonization is no longer just an aspiration; it has become an operational and regulatory requirement. Therefore, the approval of the National Action Plan for the Decarbonization of Maritime Transport represents a significant step: €250 million will be allocated between 2026 and 2030, financed by revenue from the Emissions Trading System (ETS), to support the renewal of existing vessels, the construction of new low-emission vessels, and pilot projects for renewable fuels such as ammonia and methanol.
However, this plan is only the beginning of a much broader process. According to ANAVE, the allocation of €250 million represents barely 5% of what the maritime ETS is estimated to generate by 2030 (more than €5 billion). This makes it clear that it will be essential to increase both the volume and scope of aid. Furthermore, it is not just about capital expenditure (CAPEX), but also about covering the operating costs (OPEX) derived from the use of cleaner fuels, guaranteeing the national production of renewable fuels, and ensuring that ETS revenue is effectively reinvested in the sector. As Eugenia Sillero, Secretary General of Gasnam, points out: “We welcome the publication of the Plan because it represents a very important step forward for the sector, but this boost will only be effective if it is accompanied by a key principle: that maritime ETS revenue returns to the maritime sector itself. It is essential to ensure a fair return of these resources so that the transition can be viable at a technical, economic, and operational level.”
In short, Spain has clear competitive advantages (advanced port infrastructure, a modern fleet, and a growing bunkering logistics chain), but it needs a solid support framework to transform these strengths into real leadership. The commitment to Bio-LNG, as an advanced fuel ready for scaling up, reinforces this vision. The €250 million investment is a significant boost, but it cannot be the end of the road: maritime decarbonization requires a continuous roadmap and sufficient resources if the energy transition is to be competitive, sustainable, and generate industrial and logistical opportunities for the entire Spanish maritime economy.
