The core issue in maritime decarbonization is not environmental rhetoric but control over the rules. The longer consensus at the International Maritime Organization (IMO) takes, the more likely it is that regional regulations such as the EU Emissions Trading System (EU ETS) and FuelEU Maritime will become de facto market standards—reshaping costs and forcing the entire supply chain to adapt.
Maritime decarbonization is no longer a secondary environmental issue. If the IMO’s global framework fails to move at the necessary pace, the shipping market may be reshaped first by regional regulation such as EU ETS and FuelEU Maritime. The real question today is not whether a specific policy is right or wrong, but who writes the rules, who bears the cost, and who ultimately sets the market standard.
Research offers a relatively clear picture. The IMO’s 2023 greenhouse-gas reduction strategy aims for net-zero emissions from shipping around 2050, with an interim milestone of reducing emissions by 20–30% by 2030. Yet institutions often move slower than their stated goals.
Meanwhile, as outlined by the European Commission, the EU Emissions Trading System already applies to maritime transport from 2024, and FuelEU Maritime will require ships to gradually reduce the greenhouse-gas intensity of onboard energy from 2025. What worries market participants is not simply that regulations are becoming stricter, but that different regulatory regimes are now overlapping—each moving at its own pace and guided by different policy logic.
When global rules move slowly, markets adopt regional rules as the standard
International shipping is inherently a cross-border industry. For that reason, the most efficient regulatory structure has traditionally been a single global framework. Yet UNCTAD warns that the situation is becoming more complex.
In its Review of Maritime Transport 2024, UNCTAD notes that shipping now faces geopolitical disruptions alongside the structural pressures of decarbonization. The core warning is simple: when regional regulations stack on top of each other in a global industry, the transaction costs of regulatory compliance can grow faster than the cost of reducing emissions themselves.
This dynamic is already beginning to materialize. Europe did not wait for slow international consensus. EU ETS imposes a direct carbon cost on shipping emissions, while FuelEU Maritime forces a gradual reduction in fuel carbon intensity. The logic of these policies is straightforward: if emissions are not reduced, companies pay more; if technological transition is delayed, access to the market becomes more expensive. In that sense, these policies function simultaneously as environmental policy and industrial policy.
This is where the dilemma facing the International Maritime Organization becomes visible. The IMO gains legitimacy through global consensus, but consensus is rarely fast. Regional regulations, by contrast, can be implemented quickly once political agreement exists.
Markets ultimately react to timelines more than principles. According to the IMO strategy timeline, final approval of mid-term measures is expected by late 2025, with implementation targeted around 2027. This gap matters. If regional frameworks reshape market behavior before global rules arrive, international institutions risk shifting from rule-makers to rule-adjusters.
The real difficulty of decarbonization is not technology, but investment uncertainty
Alternative-fuel ship orders are rising, but that does not guarantee an orderly transition
One statistic highlighted in the UNCTAD report is particularly symbolic: more than 50% of new ship orders by gross tonnage are now for alternative-fuel vessels. This suggests that shipowners, cargo owners, and financial institutions increasingly see decarbonization not as a cost but as a condition for long-term survival.
Yet the number alone should not be interpreted too optimistically. Ships are assets designed to operate for 20 to 30 years. Ordering an alternative-fuel vessel today is not merely a sustainability gesture—it is a large investment decision made in a market where the dominant fuel standard is still uncertain.
What shipping companies truly need is not rhetoric but predictable rules. They need clarity on which fuels will qualify, how emissions will be measured, how carbon pricing will work, and how regional and global regulatory systems will interact. Without such clarity, calculating investment returns becomes extremely difficult.
When regulatory frameworks remain uncertain, companies naturally behave conservatively. Even if they understand the necessity of decarbonization, their decisions often focus on avoiding the most expensive mistake.
For that reason, maritime decarbonization is not just a technological challenge—it is also a question of institutional credibility. Whether the future fuel is ammonia, methanol, or something else, the real risk for investors is the possibility of stranded assets caused by choosing the wrong standard too early. What the IMO must ultimately provide is not more aspirational language but enough predictability for private capital to commit to long-term investment.
Ultimately, the cost spreads across freight rates and global supply chains
The consequences extend far beyond shipping companies themselves. As carbon pricing and fuel standards tighten, costs will appear in fleet operations, fuel procurement, port call strategies, and vessel replacement cycles. These costs will then move through freight rates, long-term transport contracts, and cargo procurement strategies into the wider industrial economy.
The difficulty of maritime decarbonization lies not only in building greener ships but also in reaching agreement on who bears the cost, and in what sequence.
This challenge is particularly direct for economies like South Korea’s, where exports play a central role and manufacturing supply chains are highly integrated. When shipping regulations change, the result is not simply higher logistics costs. Delivery structures, sourcing models, pricing clauses in long-term contracts, and even product portfolios can all be affected.
A carrier’s ability to comply with environmental regulation is now part of logistics competitiveness, while a cargo owner’s ability to manage carbon exposure increasingly forms part of export competitiveness. Regulations may begin as administrative frameworks, but in the end they reshape companies’ cost structures and commercial strategies.
Power in shipping increasingly depends on the ability to interpret and absorb the rules
Shipping has traditionally been viewed as an industry defined by freight rates and vessel capacity. That remains true, but in the era of decarbonization another dimension has emerged.
Companies that understand regulatory changes first—and allocate capital accordingly—are likely to shape the future market order. This naturally favors large carriers, large cargo owners, and firms with stronger access to financial capital. The more complex the regulatory environment becomes, the harder it is for smaller companies to compete.
In this sense, regulatory fragmentation is not merely an administrative inefficiency. It can also accelerate market concentration. Complying with multiple regulatory systems requires legal expertise, accounting systems, fuel procurement strategies, and sophisticated data management. These capabilities scale with company size.
In other words, regardless of the ethical case for decarbonization, regulatory compliance itself can become a competitive advantage.
This leaves one central question: can global rule-making catch up with the speed of regional regulation? The issue is not simply institutional prestige for the IMO. It is whether international shipping will continue to operate under a shared global framework, or evolve into a fragmented industry where companies must navigate different regulatory regimes in each major market.
The former represents a system built on efficiency. The latter represents a system built on adaptation. For now, the market appears to be preparing for the second scenario.
💡 Mariecon Insight
The real contest in maritime decarbonization is not only about green technology, but about who sets the global standard. If the IMO cannot deliver an effective unified framework, regional actors such as the European Union may end up shaping the de facto rules of the industry. The resulting costs will ultimately be redistributed across shipping companies, cargo owners, and the broader manufacturing supply chain.
For the Korean B2B market, the signal is clear. Future competitiveness may depend less on securing cheaper freight and more on how early companies redesign their logistics, procurement, and contract structures around carbon regulation.