Container free time is the agreed period during which demurrage, detention or combined time-based container charges do not apply. Importers should treat it as a deadline that drives customs, trucking and warehouse planning.
Free time is not universal
The number of free days varies by carrier, country, port, contract, equipment type and booking product. Spot bookings may also have different rules from contract cargo. That is why a generic statement such as ‘five free days’ should never be used without checking the shipment’s actual terms.
Know the last free day
Record the last free day as soon as the carrier makes it available. Build backward from that date: customs clearance, terminal availability, truck appointment, delivery slot, unloading labor and empty-return plan should all be scheduled before the deadline.
Free time can cover different periods
Some carriers bill demurrage and detention separately; others may use combined arrangements. The Demurrage vs Detention guide explains the difference.
Model the financial risk
If a container holds 2,000 units and a delay creates $1,200 of time-based charges, the delay adds $0.60 per unit. Use the Freight Cost Per Unit Calculator to quantify that exposure and the Container Loading Calculator to understand how much inventory is tied to the shipment.
Check the carrier’s live information
Maersk defines free time and publishes detention/demurrage rules in its Detention and Demurrage Terms, while local country pages publish applicable tariffs and arrangements. Treat the carrier’s current shipment-specific information as the source of truth.
PackToolbox guides are built around stated formulas, practical examples and source checks for changeable carrier, freight and logistics rules. Calculators are planning aids; final requirements should be verified with the relevant carrier or service provider.