Marine-fuel sales at the Port of Rotterdam fell sharply in the first half of 2026. The Port Authority reported a 25.1% decline in total bunker volumes compared with the same period a year earlier, with conventional fuel oil recording the largest decreases.
The decline was not simply a story about weaker shipping. Rotterdam said volumes had shifted toward competing ports as new sustainability obligations under the European RED III framework increased the relative cost of conventional bunker fuels in the Netherlands.
Alternative fuels moved in the opposite direction
While fossil-fuel bunker volumes dropped, sales of alternative fuels increased by 28%. Bio-LNG grew particularly strongly, and the port recorded its first bio-ethanol bunkering during the second quarter.
That divergence is important because it shows two transitions happening at once. Rotterdam is losing some conventional-fuel business on price while building activity in fuels intended to lower shipping emissions. The strategic question is whether the second trend can grow quickly enough to offset the first.
Regulation can change geography before it changes behaviour
If a ship can buy a similar conventional fuel more cheaply at another port, a national implementation difference can move the transaction without immediately reducing the vessel's emissions. That is the competitive problem Rotterdam is highlighting.
For policymakers, it creates a familiar cross-border challenge. Environmental rules work best when neighbouring ports face broadly comparable incentives. Otherwise business can migrate across the region while the underlying fuel choice changes more slowly.
Rotterdam still has scale on its side
Rotterdam remains one of the world's major bunker ports and Europe's largest seaport. Its advantage is the combination of shipping volume, refining, storage, pipelines and industrial demand rather than one fuel category.
That scale gives the port a strong platform for alternative fuels, but it does not guarantee every activity stays in Rotterdam. The first-half numbers are a reminder that energy transition policy has immediate commercial consequences for infrastructure businesses competing only a few hours apart.