The Problem With Demurrage By Adrian Challinor, CEO, Osiris Consultants Ltd Demurrage is an issue that is necessary, but nobody likes. Simply put, it is a cost levied by the vessel owner when a vessel outstays its allowed time in port. It is a fundamental part of the contract for carriage of goods as set out in the charterparty document. It is obviously important. An examination of charterparty documents shows that approximately 75% of the clauses are to do with in-port operations. When we look at the utilisation of dry cargo vessels, we see that over 45% of their time is spent in port. So, it’s clear that this waiting time is a commercially and contractually important issue.