Demurrage vs Detention: Charges & How to Avoid Them

Demurrage is the daily charge a carrier bills you for keeping a container inside the port or terminal longer than your agreed free time. Once that free time runs out, the meter starts and you pay per container per day until it leaves the yard. It is one of the two big time-penalty fees in container shipping, and it surprises a lot of coordinators because the clock keeps running on weekends and holidays.

This guide covers the difference between the two charges, who bills what, the typical EUR rates you can expect, and the practical habits that keep these fees off your invoice.

Demurrage vs detention in one table

The fastest way to keep them straight: demurrage is about the box sitting still inside the terminal; detention is about the box sitting outside it. Both are time penalties, both are billed per container per day, and both are easy to confuse.

	Demurrage	Detention
What it charges for	Container staying inside the port/terminal too long	Container staying outside the terminal (at your yard) too long
When the clock starts	After free time at the terminal ends (import: vessel discharge)	When you pick up the box, after free time off-terminal ends
When the clock stops	When you collect the box from the terminal	When you return the empty box to the depot
Who is being penalised	Cargo not cleared/collected fast enough	Equipment held by you too long
Who bills it	Shipping line / terminal	Shipping line

Both fees are sometimes bundled and quoted together as a single "demurrage and detention" tariff, but they cover two separate stages of the journey.

Who charges what, and when the clock starts

The shipping line owns both charges, because they own the container. The terminal may also levy its own storage fee that sits on top of demurrage.

The starting point depends on the direction of the move:

Import demurrage starts after the vessel discharges and your free time at the terminal expires. It runs until you collect the loaded box.
Detention starts the moment you take the loaded container out of the terminal and runs until you hand the empty back to the nominated depot.
Export flips the order: detention applies while you have the empty box for loading, demurrage applies if the loaded box waits too long at the terminal before the vessel sails.

Who actually pays the bill often comes down to your Incoterms. Under EXW or FCA the buyer typically carries port and delivery risk; under DAP or DDP the seller does. If you are unsure where your responsibility ends, the Incoterms reference lays out who controls the cargo at each handover point. Getting this wrong is one of the most common ways a charge lands on the wrong party.

Surprise charges start with vague bookings - quote clean RFQs to your own carriers in 60 seconds so the handover, free time, and responsible party are written down from the start.

Typical daily rates and how they stack up

Rates vary by carrier, port, container type, and how late you are. A common pattern is tiered pricing: the longer the delay, the higher the per-day rate. A reefer (refrigerated) container almost always costs more than a dry box because it draws power and is scarcer.

Here is a realistic worked example for a 40-foot dry container imported into a Northern European port, with five days of free time:

Day past free time	Demurrage tier	Rate/day (EUR)	Running total (EUR)
Days 1-3	Tier 1	60	180
Days 4-7	Tier 2	110	620
Days 8+	Tier 3	175	—

So a box collected eight days late has already cost around 620 EUR in demurrage alone - before any terminal storage or detention is added. Hold the empty box a further three days past your detention free time at, say, 50 EUR/day, and you add another 150 EUR. The bill compounds fast because the tiers climb and the days do not pause for weekends.

Treat these numbers as illustrative ranges, not quotes - confirm the exact tariff with your carrier for each lane. When you are pricing a door-to-door move and want to sanity-check the line-haul portion against these accessorials, the freight-rate calculator gives you a quick EUR/km baseline to compare against.

The five habits that rack up these charges

Most demurrage and detention bills come from a handful of repeat patterns:

Late or incomplete customs paperwork - the box clears the vessel but cannot leave the terminal, so demurrage runs while documents catch up.
No haulier booked in advance - the cargo is ready to collect but there is no truck slot, so the box waits.
Holding the empty too long - the container is unloaded at your warehouse but the empty return gets forgotten for a few days.
Free time misread - assuming you have ten days when the contract says five, or assuming weekends are excluded when they are not.
Vague bookings - the carrier and you disagree on free time, handover point, or who pays, and the dispute outlasts the free window.

General information only - not customs, tax or legal advice.

How to avoid them (free time, fast turnarounds, clear bookings)

You cannot always control vessel schedules, but you can control turnaround speed and paperwork. The goal is simple: get the loaded box out, unloaded, and the empty returned before any clock expires.

Negotiate longer free time up front. On high-volume lanes, ask the carrier for extra free days when you book - it is far cheaper than paying tier-3 demurrage later.
Pre-clear customs before the vessel arrives. Lodge the import declaration early so the box is collectable the day free time ends, not days after.
Book the haulier in parallel, not after. Line up the truck slot the moment you know the ETA, so collection happens on day one of availability.
Track the empty as carefully as the loaded box. Set a return reminder the day you unload - a forgotten empty is pure avoidable detention.
Write clean bookings. Spell out free time, handover point, container type, and the responsible party in every RFQ so there is nothing to argue about.

That last point does the most work. When your carrier quotes, free time terms, and responsibility are written down before the box ships, demurrage and detention stop being surprises and become numbers you planned for.

FAQ

What is demurrage in simple terms?

Demurrage is a daily fee the shipping line charges when your container sits inside the port or terminal longer than the free time you agreed. The clock starts when free time ends and stops when you collect the box.

What is the difference between demurrage and detention?

Demurrage applies while the container is still inside the terminal; detention applies once you have taken it outside and are holding it too long before returning the empty. Same idea - a per-day time penalty - but at two different stages of the move.

How are demurrage charges calculated?

They are billed per container per day, usually on a rising tier scale - the longer the delay, the higher the daily rate. Reefer and special-equipment containers cost more than dry boxes, and the days typically include weekends and holidays.

How can I avoid detention fees?

Return the empty container before your off-terminal free time expires. Book the haulier early, unload promptly, and set a return reminder the day the box reaches your yard so the empty does not get forgotten.

Who pays demurrage and detention - buyer or seller?

It depends on your Incoterms and who controls the cargo at each stage. The shipping line bills whoever holds the container, so settle the responsible party in the booking before the box moves.

Does free time include weekends and holidays?

Often yes, but it depends on the carrier and port. Always confirm in writing whether your free days are calendar days or working days - assuming the wrong one is a common way to slip into demurrage.