---
title: "Detention"
description: "Keeping equipment beyond the time allowed. demurrage."
url: "https://oceancargo.co.uk/shipping-terms/detention"
date: "2026-05-01T04:09:42+00:00"
language: "en-GB"
---

![Ocean Cargo](https://oceancargo.co.uk/images/GenPics/OCs-Customs-Brokerage.webp)

 # Demurrage and Detention: Your Essential Guide to Avoiding Costly Shipping Delays

## Understanding Demurrage and Detention in Global Freight

In the intricate world of international shipping, understanding key terminology is crucial for efficient and cost-effective logistics. Two terms that frequently cause confusion and, more importantly, unexpected expenses for businesses are **demurrage and detention**. At Ocean Cargo, we believe in empowering our clients with knowledge to navigate these complexities. This comprehensive guide will demystify these charges, explain how they arise, and provide actionable strategies to minimise their impact on your supply chain.

While often used interchangeably, demurrage and detention refer to distinct charges levied by shipping lines and port authorities. Both are penalties for exceeding agreed-upon free time for equipment usage, but they apply at different stages of the shipping process. Ignoring or misunderstanding these can lead to significant, avoidable costs, impacting your bottom line and potentially delaying your goods.

## What is Demurrage?

**Demurrage** is a charge applied by the shipping line when imported cargo remains at the port or terminal beyond the allocated "free time." This free time is the period during which the container can stay at the port without incurring additional charges, typically starting from the moment the vessel arrives or the container is discharged from the ship.

Think of it as a parking fee for the container at the port. The shipping line wants their valuable equipment (the container) to be moved out of the terminal as quickly as possible to free up space and allow for its next use. If your container isn't cleared through customs and picked up by your haulier within the free time, demurrage charges begin to accrue daily.

### Common Causes of Demurrage:

- **Customs Delays:** Incomplete or incorrect documentation, or unexpected inspections, can hold up customs clearance. Ocean Cargo's [customs compliance services](https://oceancargo.co.uk/services/customs-compliance/) are designed to mitigate these risks.
- **Documentation Errors:** Missing or inaccurate paperwork (e.g., Bill of Lading, commercial invoice, packing list) can prevent the release of cargo.
- **Consignee Unpreparedness:** Lack of available warehouse space, insufficient labour, or an unbooked haulier can delay collection.
- **Port Congestion:** While less common for individual shipments, severe port congestion can sometimes contribute to delays beyond the consignee's control.
- **Payment Issues:** Delays in paying freight charges or duties can prevent cargo release.

Demurrage charges can escalate rapidly, often starting from £50-£100 per day and increasing significantly after a few days. For multiple containers, these costs can quickly run into thousands of pounds, making proactive management essential.

## What is Detention?

**Detention**, on the other hand, is a charge applied by the shipping line when the consignee holds their equipment (the container) outside the port or terminal beyond the agreed-upon free time. This typically occurs after the container has been picked up from the port but has not been returned to the designated depot or port within the specified period.

This charge is essentially a penalty for keeping the shipping line's container for too long, preventing them from using it for another shipment. The free time for detention usually starts from the moment the container leaves the port and ends when the empty container is returned.

### Common Causes of Detention:

- **Unloading Delays:** Insufficient labour, equipment breakdowns, or unexpected issues at the consignee's warehouse can prolong the unloading process.
- **Haulier Scheduling Issues:** Difficulties in arranging the return of the empty container promptly.
- **Warehouse Congestion:** Limited space at the destination warehouse can slow down the devanning process.
- **Weekend/Holiday Delays:** If free time expires over a weekend or public holiday, and the container cannot be returned, detention charges may still apply.

Like demurrage, detention charges are typically levied on a daily basis and can be substantial. Effective planning for unloading and return logistics is key to avoiding these costs.

## Demurrage vs. Detention: Key Differences at a Glance

To summarise the distinction, consider the following:

- **Location:** Demurrage applies while the container is \*at the port/terminal\*. Detention applies while the container is \*outside the port/terminal\* (e.g., at your warehouse).
- **Purpose:** Demurrage is for occupying port space. Detention is for occupying the shipping line's equipment.
- **Trigger:** Demurrage starts after vessel arrival/discharge if not picked up. Detention starts after pickup if not returned empty.
- **Responsible Party:** Both are ultimately the responsibility of the consignee (importer), though the immediate cause might vary.

Understanding these nuances is vital for effective supply chain management and for challenging incorrect charges if they arise. Ocean Cargo's team of experts can provide clarity on these charges for your specific shipments, whether you're utilising our [sea freight services](https://oceancargo.co.uk/services/sea-freight/) or [air freight solutions](https://oceancargo.co.uk/services/air-freight/).

## Strategies to Minimise Demurrage and Detention Charges

Avoiding these charges requires proactive planning, meticulous execution, and robust communication. Here are Ocean Cargo's top strategies:

1. **Accurate and Timely Documentation:**
    - Ensure all shipping documents (Bill of Lading, commercial invoice, packing list, customs declarations) are accurate, complete, and submitted well in advance.
    - Work closely with your supplier to verify all details before shipment.
2. **Pre-Clearance and Customs Preparedness:**
    - Utilise pre-clearance options where available.
    - Engage a reliable customs broker, like Ocean Cargo's [customs compliance team](https://oceancargo.co.uk/services/customs-compliance/), to handle declarations and ensure smooth processing.
    - Be aware of specific import regulations for your goods and destination country, such as our [customs brokerage for the USA](https://oceancargo.co.uk/countries/usa/customs-brokerage-usa).
3. **Efficient Haulage and Unloading Planning:**
    - Book your haulier well in advance of the container's arrival.
    - Ensure your warehouse has sufficient capacity, labour, and equipment to unload the container quickly upon arrival.
    - For large or complex shipments, such as [excavators and diggers to the UAE](https://oceancargo.co.uk/countries/uae/excavators-diggers-uae), plan the unloading process meticulously.
4. **Negotiate Free Time:**
    - For high-volume shippers or specific trade lanes, it may be possible to negotiate extended free time with shipping lines. Ocean Cargo can often leverage its relationships to secure better terms for our clients.
    - Standard free time is typically 3-5 days, but this can vary. Always confirm the exact free time with your freight forwarder.
5. **Real-Time Tracking and Communication:**
    - Stay informed about your shipment's status. Ocean Cargo provides transparent tracking and proactive updates.
    - Maintain open lines of communication with your freight forwarder, haulier, and warehouse staff.
6. **Consider Alternative Shipping Methods:**
    - For smaller, less time-sensitive shipments, [LCL (Less than Container Load)](https://oceancargo.co.uk/services/sea-freight/) might offer more flexibility, as the container is devanned at a consolidation warehouse, potentially reducing your direct exposure to container detention.
    - For urgent cargo, [air freight](https://oceancargo.co.uk/services/air-freight/) eliminates these specific container-related charges, though it comes with its own cost structure.
7. **Understand Your Incoterms:**
    - Your chosen Incoterms (e.g., EXW, FOB, CIF, DDP) dictate where responsibility and costs transfer from seller to buyer. Ensure you understand your obligations regarding port charges and container handling.

By implementing these strategies, businesses can significantly reduce their exposure to demurrage and detention charges, leading to more predictable and efficient supply chains. Ocean Cargo works as your strategic partner, providing expert advice and hands-on support to navigate these challenges, whether you're shipping [wind turbine components to Australia](https://oceancargo.co.uk/countries/australia/wind-turbine-components-blades-nacelles-tower-sections-australia) or general cargo to Canada.

## Frequently Asked Questions About Demurrage and Detention

#### Who is responsible for paying demurrage and detention charges?

Ultimately, the consignee (importer) is responsible for these charges, as they are the party receiving the goods and are expected to clear and collect them within the free time. However, the immediate cause might sometimes be attributed to other parties (e.g., a customs broker's error), which can lead to disputes.

#### Can demurrage and detention charges be waived or negotiated after they've been incurred?

It is extremely difficult to get these charges waived once incurred, especially if the delay is due to the consignee's actions or lack of preparedness. In rare cases, if the delay is clearly attributable to the shipping line or port (e.g., equipment breakdown at the terminal), a waiver might be possible. It's always best to prevent them rather than try to dispute them.

#### How do I find out the free time for my shipment?

The free time for both demurrage and detention should be clearly stated on your Bill of Lading or in the terms provided by your freight forwarder. Always confirm these details with Ocean Cargo when booking your shipment to avoid any surprises.

#### What's the difference between demurrage/detention and storage charges?

Demurrage and detention are charges from the shipping line for the use of their container and occupying port space. Storage charges, on the other hand, are typically levied by the port or terminal operator for storing the cargo itself (not necessarily the container) beyond a certain period, often after the container has been devanned or if the cargo is loose. While related, they are distinct charges.

### Ready to simplify your global logistics?

Get advice and a quote for your next shipment. Contact the Ocean Cargo team to start shipping.

[Freight Quote](https://oceancargo.co.uk/contact-us)

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