Laytime Calculations — Where Most Claims Are Won or Lost

Graham Fairhurst • 24 October 2025

Laytime Calculations Explained | How Precision Protects Against Demurrage Loss

Large oil tanker steaming through a calm, blue ocean under a clear sky.

Demurrage disputes are rarely won through negotiation alone — they are won (or lost) in the precision of laytime calculation. Every minute of vessel time must be documented, interpreted and timed according to the exact wording of the charter party. One incorrectly excluded waiting period or undocumented NOR controversy can reduce recoverable value by six figures.


This is where specialist expertise is mission-critical. GCF Operations performs forensic laytime analysis — cross-referencing charter terms, port events, time zones and terminal documentation with zero tolerance for assumption. The result: defensible claims, stronger leverage in negotiation, and zero room for counterparty manipulation. In demurrage, precision is profit.

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