To evaluate the economic viability of bio-methanol and e-methanol as sustainable marine fuels within the regulatory frameworks of FuelEU Maritime and the EU Emissions Trading System (ETS). The report provides an analysis of compliance pathways and the economic incentives for adopting these fuels compared to fossil fuels such as VLSFO, emphasizing the penalties for non-compliance. The findings support the potential of these regulations to facilitate a transition to sustainable fuels by creating a stable investment environment for fuel producers and encouraging adoption by shipping operators.