By the Waymore Shipping Operations Team | Last updated: August 15, 2026 | 12 min read

Demurrage & Detention Fees: How to Avoid Container Storage Costs

Demurrage and detention are carrier charges for late container pickup and late container return. Demurrage applies while your full container sits inside the destination terminal after free time ends; detention applies once you take the box out of the port but return it late. Combined, they typically run $150–$600 per container per day and are among the most avoidable costs in international shipping.

We see the consequences every week from our Shenzhen operations desk: importers who budgeted $2,800 for a 40HC from Shanghai to Los Angeles and then received a surprise $1,900 terminal invoice because customs clearance took nine days instead of four. This guide explains exactly how these charges work, what they cost, and — most importantly — how to make sure you never pay them.

What Is the Difference Between Demurrage, Detention and Storage?

These three charges overlap, and that confusion is exactly why importers overpay. Here is the plain-English breakdown:

Demurrage — inside the terminal

Demurrage is charged by the shipping line when your container remains inside the port terminal beyond the agreed free time after the vessel discharges it. The clock usually starts when the container is available for pickup, not when you actually arrive to collect it. You pay because the box occupies scarce terminal yard space and the carrier cannot reuse the equipment.

Detention — outside the terminal

Detention kicks in after you pick up the container. If the line gave you 4 free days to haul the box to your warehouse, unpack it, and return the empty, day 5 begins accruing detention until the empty is gated back in. Some carriers now bundle the two into a single combined charge (sometimes called "combined free time" or CFT), which is actually easier to manage.

Terminal storage & per diem — the third layer

On top of carrier charges, terminals themselves bill port storage fees for yard space, and rail operators may add per diem charges for delayed inland rail moves. Importers are often surprised that a delayed container can trigger all three invoices at once. A useful rule: the terminal bills for space, the carrier bills for time, and nobody warns you before either clock starts.

How Much Do Demurrage and Detention Fees Actually Cost?

There is no single published tariff, but the structure is consistent across major carriers like Maersk, MSC, CMA CGM and COSCO: a daily charge that escalates in steps the longer the container sits. Industry tracking by Drewry and other market analysts has repeatedly shown these charges rising since 2020, with some US ports among the most expensive in the world. The table below shows realistic 2026 ranges our team sees on quotes and invoices for a 40HC at major destination gateways.

Two things make these numbers worse in practice. First, they are per container — an importer with six containers stuck during a customs exam is not facing one fee, but six. Second, free time is often split (for example, 4 days demurrage + 4 days detention) rather than combined, so a slow trucking company can burn through both clocks in one trip. When comparing quotes, this is one of the hidden freight quote fees that only appears after the cargo has already sailed.

How Many Free Days Do You Get — and Can You Get More?

Standard free time at most destination ports is 3–7 calendar days, with 4 days common at congested US and North European gateways and up to 7–10 days at some inland or African destinations where carriers expect slow clearance. At Chinese origin ports, export containers usually receive 3–5 free days before gate-in.

What many importers do not realize: free time is negotiable at booking, not after arrival. When Waymore books space on behalf of clients, we routinely request extended free time — 10 or 14 days — for shipments going to inland destinations (Chicago, Dallas, Munich, Riyadh) where customs and trucking naturally take longer. Carriers grant this far more willingly before loading than they grant fee waivers after. It costs nothing to ask, and on a congested lane it can save thousands.

Ask specifically about three things when you or your forwarder confirm a booking:

• Demurrage free days at the discharge port.
• Detention free days for the container at your premises.
• Whether the two are combined or run separately — combined free time is significantly safer for you.

Why Do Containers Get Stuck? The 6 Most Common Causes

In a typical week our team handles dozens of destination queries, and the causes of demurrage rarely surprise us. Ranked by how often we see them:

1. Slow customs clearance — missing or wrong documents (ISF filing errors for US cargo, incorrect HS codes, missing CE/inspection certificates for EU goods).
2. Consignee cash-flow problems — the buyer has not paid the supplier balance, so the original bill of lading is never released and the container cannot be picked up.
3. Terminal congestion — vessel bunching, labor shortages or yard congestion make appointments scarce. Port performance monitoring such as the IMF PortWatch dashboard shows how quickly queues build and clear at major gateways.
4. Trucking bottlenecks — chassis shortages and driver capacity at US ports mean containers can sit even after customs release.
5. Missed communication — the importer did not know the vessel arrived, or the notify party email was wrong on the bill of lading.
6. Exams and holds — random customs exams (X-ray or intensive) that take 5–15 days during which free time may or may not be paused.

Note that four of these six causes are fully within the importer's control. That is the good news: demurrage is not bad luck, it is a process failure — and process failures can be engineered away.

How Do You Avoid Demurrage and Detention? 7 Practical Tactics

1. Send documents before the vessel sails

Commercial invoice, packing list, bill of lading draft confirmation, and destination-specific certificates should be checked while the container is still at sea, not after arrival. We pre-lodge documents for destination customs on every DDP shipment we handle, which is why our door-to-door clients rarely see terminal charges. If you self-clear, request draft documents from your forwarder at least 7 days before ETA.

2. Negotiate free time at booking

As covered above, request 10–14 days for inland or high-risk destinations. Get it written into the booking confirmation — a verbal promise is worth nothing at the terminal gate.

3. Use a customs broker in advance

Arrange your destination customs broker before the shipment leaves China, and file pre-clearance where the destination country allows it. US importers can file ISF and even entry data so the container is effectively cleared before it touches the dock. Guidance is publicly available from US Customs and Border Protection, and equivalent pre-lodgement systems exist in the EU and UK.

4. Track arrival milestones automatically

Relying on your supplier to tell you the container has arrived is how deadlines get missed. Set milestone alerts (discharged, available for pickup, customs release) through your forwarder or the carrier's tracking portal, and make sure the notify party on the bill of lading is someone who checks email daily.

5. Book door-to-door (DDP) where possible

Under a DDP arrangement, the forwarder — not you — owns the customs process, the trucking appointment and the free-time clock. The fee risk transfers to the party best equipped to manage it. This is a major reason our US and EU clients choose DDP shipping from China for regular replenishment orders.

6. Plan container returns like a production task

Detention is the "boring" half of the problem that warehouse teams cause. Give your warehouse a hard return-by date the moment the container is picked up, and remember that late empty returns during peak season can even affect your future space allocation with carriers.

7. Dispute unfair charges promptly

If fees are caused by terminal congestion, carrier schedule changes, or customs system outages, dispute them in writing within the first week with evidence. Carriers reduce or waive more often than importers expect — but only when the request is early, documented and specific. A dispute filed after 30 days is usually dead on arrival.

What Happens If You Simply Ignore the Fees?

Worse than the fees themselves: unpaid demurrage and detention can lead to the container being auctioned or scrapped under port and carrier rules, cargo insurance complications, and the terminal placing an account on hold that blocks all future shipments in your name. Cargo insurance also does not cover these charges — they are administrative penalties, not cargo damage, which is a common misconception explained in our cargo insurance guide. The financial exposure compounds daily, so the moment you know a container will overrun free time, act: request an extension, hire drayage, or escalate clearance.

Frequently Asked Questions

What is the difference between demurrage and detention?

Demurrage is charged when a full container stays inside the port terminal longer than the free time allowed after discharge. Detention is charged when you keep the carrier's container outside the port — at your warehouse or your customer's site — longer than the agreed free days. In short: demurrage is storage at the terminal, detention is late container return.

How much are demurrage and detention fees per day?

Fees vary by carrier, port and container size, but a realistic working range is $75–$150 per day for the first 4–5 days, rising to $150–$300 per day in days 6–10, and $300–$600+ per day beyond that. A single container that sits for two weeks can easily generate $3,000–$6,000 in combined demurrage, detention and per-diem charges.

How many free days do carriers usually give?

Most carriers offer 3–7 days of combined free time at destination ports, with 4 days being common at busy US and European gateways. At Chinese origin ports, export containers typically get 3–5 free days before pickup. Free time can sometimes be negotiated upward — ask your forwarder to request 10–14 days when booking, especially for inland destinations.

Can demurrage fees be waived or disputed?

Yes, sometimes. Carriers will often reduce or waive fees when the delay was caused by factors outside the consignee's control: terminal congestion, vessel schedule changes, customs system outages, or documentation errors by the carrier or port. Submit a written dispute with evidence — terminal receipts, customs timestamps, carrier notices — within the first week. Success rates are much higher when the request is prompt and documented.

Does demurrage apply at the origin port in China too?

Yes. If your loaded export container is gated in at a Chinese port but misses the vessel — for example because of a customs exam or a missed cut-off — demurrage starts accruing at the origin terminal after the free period, often 3–5 days. Combined with port storage, origin demurrage is a common hidden cost when cargo is not ready before booking.

Who pays demurrage and detention under FOB and CIF terms?

Under standard practice, destination demurrage and detention are the consignee's responsibility regardless of whether the shipment moved FOB, CIF or DDP, because they occur after delivery obligations are met — unless the sales contract or DDP agreement states otherwise. Always confirm in writing which party bears these charges before confirming a purchase order.