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Global Shipping Faces First-Ever Carbon Tax as US Threatens Tariffs Amid IMO Climate Push

The International Maritime Organisation (IMO) is set to approve a landmark global carbon levy on shipping emissions, marking a historic step towards maritime decarbonisation. The proposed rules would make vessels over 5,000 gross tons pay up to $350 per tonne for failing to meet emission targets, generating more than $10 billion annually to fund green fuel adoption. However, the United States has strongly opposed the plan, branding it a “global carbon tax” and threatening tariffs, sanctions, and visa restrictions against supporting nations. Despite Washington’s defiance, industry insiders expect the measure to pass, backed by the UK, the Netherlands, and other IMO members. If implemented, the tax could reshape global trade costs and accelerate the shift towards cleaner fuels like ammonia and LNG. This decision, due before COP30, may redefine international climate governance and the future of global shipping.