Voyage economics · EU ETS 2026, 100% surrender

Speed & CarbonOptimizer

Slower burns less fuel and fewer allowances, but ties the ship up longer. This works out where the money actually lands on a single voyage — and who it lands on.

Voyage & vessel

Who pays for the bunkers?

Voyage

Consumption & prices

EU ETS scope of this voyage

Assumptions you can change
The cubic law is an approximation. Real vessels sit between 2.5 and 3.5 depending on hull form, draft and fouling; auxiliaries do not scale with speed at all, which is why they are entered separately.
Net voyage result
Across 12 comparable voyages a year

Where the money moves

LineCurrentProposedChange
Voyage timeSea passage only
Fuel burntTotal, main engine + auxiliaries
CO₂ in ETS scopeTonnes requiring allowances
Effect on the voyage
Bunker cost saved
EU ETS allowances saved
Cost of the extra daysHire or TCE forgone while the ship is still at sea
Net
Break-even hire rate
Least-cost speed
CO₂ avoided
Allowances not bought

Net result across the speed range

Net result vs current speed Proposed speed Least-cost speed