What Are Demurrage and Detention?

Demurrage and detention — often abbreviated together as D&D — are two distinct container usage fees charged by shipping lines to importers and consignees who hold containers beyond the permitted free time period. The critical distinction lies in where the container is located when the overstay occurs: demurrage applies when an import container remains inside the port terminal or container yard beyond the free time after discharge, while detention applies when a container remains outside the terminal — at the consignee's premises or a third-party depot — beyond the allocated period after it has been picked up. Together, these fees serve as the shipping industry's mechanism for ensuring the rapid turnaround of container equipment, which is one of the most capital-intensive assets in the global supply chain.

How Demurrage and Detention Work

The demurrage timeline begins on the day a container is discharged from the vessel at the destination port. From that moment, the consignee has a contracted number of free days — typically 3 to 7 calendar days, though this varies by carrier, port, and contract terms — during which the container can remain at the terminal without charge. If the consignee fails to pick up the container within the free period, demurrage begins to accrue on a per-container-per-day basis, with rates typically escalating in tiers to create mounting pressure for prompt collection. For example, a carrier might charge USD 75 per day for the first 5 days beyond free time, USD 125 per day for days 6 through 10, and USD 200 per day thereafter. Calendar days (not business days) are the standard counting unit, meaning weekends and holidays count toward the demurrage clock.

Detention begins once the container is picked up from the terminal and gates out. The consignee is allocated a separate free period — typically 5 to 14 calendar days — to unload the container at their premises and return the empty unit to the carrier's designated depot. If the empty container is not returned within the detention free days, detention charges begin to accrue, again on an escalating per-day basis. Combined demurrage and detention charges for a single container delayed by customs holds, documentation problems, or congestion can quickly climb past USD 5,000, and for particularly prolonged detentions involving multiple containers, the total exposure can run into six figures — a frequent source of disputes between shippers, consignees, forwarders, and shipping lines.

Why Demurrage and Detention Matter in International Trade

D&D charges represent one of the largest and most contentious ancillary costs in container shipping. During the 2021–2022 global supply chain crisis, when port congestion caused containers to sit at terminals for weeks beyond normal free time, industry analysts estimated that global D&D charges reached approximately USD 20 billion annually, with individual shippers sometimes facing D&D bills exceeding the value of the cargo inside the container. Even in normal conditions, D&D charges consistently rank among the top three unexpected costs reported by importers. The financial risk is amplified by the fact that demurrage is typically charged directly to the consignee by the shipping line, with little room for negotiation, and payment is often required before the container can be released. Moreover, under many bills of lading and carrier tariffs, the shipping line retains a lien on the cargo for unpaid charges, meaning goods can be held until D&D fees are settled regardless of who was responsible for the delay.

Technology and D&D Reduction

Digital tools are increasingly helping importers manage and reduce D&D exposure. Real-time container tracking platforms provide visibility into vessel arrival, discharge timing, and free-day countdowns, alerting consignees before demurrage kicks in. Automated customs clearance systems — such as digital single-window portals — can accelerate import processing from days to hours, reducing one of the most common causes of demurrage: customs holds. Terminal appointment systems with AI-powered slot allocation are reducing truck turn times and gate congestion, enabling faster container pickup. GOTEC's port supervision technology contributes indirectly to D&D reduction by accelerating the customs inspection process: faster container scanning and AI-assisted image analysis at port gates mean fewer containers held for manual inspection, shorter clearance times, and lower demurrage risk for importers.

Frequently Asked Questions

What is the typical free time for demurrage and detention?

Standard demurrage free time at most international ports is 3 to 7 calendar days from the date of container discharge. Detention free time typically ranges from 5 to 14 calendar days from the day the container is picked up from the terminal. Both free periods are negotiable within the freight contract and may be extended in major port congestion events.

How much do demurrage and detention fees cost?

Demurrage fees typically range from USD 50 to USD 150 per container per day, escalating in tiers. A common structure might be USD 75/day for days 1–5 beyond free time, USD 125/day for days 6–10, and USD 200/day thereafter. Detention fees follow a similar escalating pattern. Combined D&D charges can exceed USD 5,000 per container for extended multi-week delays.

Related Terms

  • TEU — The standard unit of container capacity; demurrage and detention are both charged on a per-container (and thus per-TEU equivalent) basis by shipping lines.
  • Container Terminal — The port facility where containers are discharged and where demurrage accumulates when import containers overstay their free period.
  • FCL vs LCL — Full Container Load shipments are directly exposed to D&D charges; in LCL, the consolidator typically manages the D&D risk and passes costs through to individual shippers.
  • Port Throughput — A measure of container volumes handled by a port; high throughput with insufficient yard capacity is a leading cause of congestion-driven demurrage.