How Do I Avoid Demurrage and Detention Fees on Food Container Imports?

Demurrage vs Detention — What's the Difference?

I get this question on every other call from a new importer. The two words sound similar, the carriers use them interchangeably in conversation, and the invoices that come at the end of the month don't always make it clear which is which. So let me untangle them in plain terms.

Demurrage is a charge for a full container that sits inside the port terminal past the free time you were given. The vessel discharged your box, and now it's sitting on the yard waiting for somebody — usually you or your customs broker — to clear it and pick it up.

Detention is a charge for the carrier's empty container after you've picked it up but haven't returned it yet. You unloaded your food at your warehouse, and now the empty steel box is sitting in your yard while the shipping line is waiting to put it back into the rotation.

Some shipping lines combine the two into a single "merged free time" or "per-diem" tariff. Others bill separately. The labels matter less than understanding what triggers each one. Before we go further, here's a quick side-by-side I share with new clients during onboarding — see also our documentation guide for food imports for the paperwork that drives most demurrage delays.

How Fast the Fees Pile Up

The thing that catches most first-time importers is how the daily rate is structured. Carriers don't charge a flat fee. They tier the daily rate so that the longer your container sits, the more painful it gets — and the more incentive there is to move it.

Here's a typical demurrage schedule from a major shipping line on the U.S. East Coast → West Africa lane in 2026:

Run the math on a real scenario: your 40ft container clears the vessel on day zero. Customs paperwork hits a snag and your broker needs an extra ten days. By day 15, you've burned through five free days and racked up five days at $120 ($600) plus five days at $240 ($1,200) — a $1,800 bill before detention even begins.

I tell every importer the same thing: demurrage is not bad luck. It's almost always a paperwork problem that started two weeks before the ship even arrived. If you fix the paperwork problem, the fees disappear. If you don't, the fees will find you on every shipment.

— Elhadji Sy, Project Manager, U.S. International Foods

Why Food Cargo Gets Hit Harder

Food shipments face three additional pressures that general cargo doesn't, and any one of them can stretch your free time beyond what's reasonable.

First, FDA Prior Notice and food regulatory holds. Every food import into the U.S. requires a Prior Notice filed via FDA before the shipment arrives, and FDA can place a hold on any container for inspection. The same is true in reverse for our outbound containers — destination food authorities (NAFDAC in Nigeria, KEBS in Kenya, COFEPRIS in Mexico) can hold a container at the port for sampling. Holds can last 3 to 14 days. The free-time clock keeps ticking the entire time.

Second, tropical port yards are brutal on food. A container sitting on a Lagos or Mombasa yard in May reaches internal temperatures north of 50°C (122°F) within a few hours of sun exposure. Chocolate melts. Cooking oils degrade. Cereals attract pests. The longer your demurrage situation drags on, the more product you lose to spoilage — even before the carrier sends you the invoice.

Third, perishables and short-shelf-life products. If you're importing dairy, meat, or anything with a 12-month shelf life or shorter, every day in port eats into the time you have to sell the product before retailers refuse it. I've watched importers pay $2,000 in demurrage on a container of yogurt only to have the wholesalers reject the whole shipment for arriving with less than 60% shelf life remaining.

The Seven Moves That Keep Your Container Fee-Free

After 500+ containers shipped from St. Louis to ports across West Africa, Latin America, and Asia, these are the seven habits that separate importers who pay demurrage from importers who don't. None of them are complicated. Most cost nothing. They just require organization a few weeks before the ship arrives.

1. File your customs entry before the vessel arrives, not after. Most countries allow pre-arrival manifests once the bill of lading is issued. In Nigeria, the Form M and PAAR can be processed 5–10 days before vessel arrival. In Mexico, the pedimento can be lodged in advance. Your broker should be working in parallel with the carrier, not waiting for the ship to dock.
2. Get all original documents in the importer's hands at least 7 days before vessel arrival. That includes the bill of lading, commercial invoice, packing list, certificate of origin, free sale certificate, and any sanitary or phytosanitary certificates. If you're using telex release or eBL, confirm it's released to the destination office before the vessel arrives — not the day of.
3. Book your trucking the same day you get your arrival notice. Trucker shortages are real, especially in West African ports during peak season. Wait 48 hours and you'll be quoted three times the rate or told nothing's available for a week.
4. Negotiate extra free time in writing for your regular lanes. If you ship a container a month on the same lane, your shipping line will grant you 10–14 days of merged free time instead of the standard 5–7. Ask for it in your annual contract or a side letter, not over the phone.
5. Use a customs broker who has direct system access at the destination port. A broker who has to email the customs office and wait for replies will lose you days. Use one with online access to NAFDAC, KEBS, COFEPRIS, GACC — whoever your destination regulator is — and is filing entries directly into the system.
6. Plan your warehouse to unload in one day, not three. Detention starts the moment you collect the empty container. If your warehouse is a one-truck operation and you've imported 18 pallets, plan extra labor or a temporary unload team for the day. A $200 day of extra labor saves $400 in detention.
7. Know your empty return depot and its hours before you book trucking. Carriers nominate specific depots for empty returns, and the depot can change between shipments. If you assume the same depot as last time and it's wrong, your trucker drives empty across the city, the depot closes, and you pay an extra day of detention.

What to Do If You're Already Racking Up Fees

Sometimes the situation has already gone wrong. You're on day eight, the container is still in the port, and the daily charges are climbing. Here's the playbook I run when a client calls me in panic mode.

Stop, calculate the daily bleed, and prioritize. Pull up the carrier's tariff schedule and figure out exactly what each additional day costs. Compare that against what it would cost to expedite — overnight broker fees, expedited customs filings, premium trucking. Almost always, paying $300 to expedite saves $600 in additional demurrage.

Ask the shipping line for a free time extension in writing. Carriers grant 2–3 day extensions when there's a legitimate operational reason — port congestion, customs delay outside your control, a verified document issue. The extension has to be requested before the charges start accruing in many tariffs, so move fast.

Dispute incorrect charges within 30 days using the FMC Final Rule. Since May 2024, U.S. carriers must itemize demurrage and detention invoices showing the specific dates, container number, free time, and tariff rate. If anything doesn't match, you have 30 days to dispute. Many invoices have errors — wrong free-time start date is the most common one I see. Dispute the line, not the entire invoice.

My Pre-Arrival Checklist (Steal This)

This is the checklist I run for every U.S. International Foods container, no matter the destination. If you copy nothing else from this post, copy this list and use it for your next shipment.

Regional Notes — Lagos, Tema, Mombasa, Veracruz, Shanghai

The general rules above hold worldwide, but every port has its own quirks. Here's what I've learned shipping into the lanes where U.S. International Foods works most often. For deeper regional context, see our country-specific guides for Nigeria, Ghana, and Kenya.

Lagos (Apapa & Tin Can). Free time is typically 7 days, but congestion regularly stretches the effective free-time delay to 12+ days because of slow inspection. NAFDAC pre-shipment information (PAAR) is mandatory and must be submitted before vessel arrival. Plan trucking 5 days ahead — Apapa traffic alone can eat a full day.

Tema (Ghana). Free time is shorter — 5 days is typical. The Ghana Single Window (GCNet/UNIPASS) is genuinely fast if your broker is set up properly. The bottleneck is usually FDA Ghana sampling for new product registrations.

Mombasa (Kenya). 4 days demurrage free time at most carriers. KEBS pre-export verification of conformity (PVoC) must be in place — without the certificate of conformity your container will not move. Use a clearing agent licensed for the SCMS system.

Veracruz / Manzanillo (Mexico). 7 days free time is standard. The pedimento process is fast when filed pre-arrival. Watch for "previo" inspection — random physical inspection that can add 2–3 days. COFEPRIS holds for new food brands are the most common cause of demurrage. See our Mexico import guide for the full breakdown.

Shanghai & Ningbo (China). Among the fastest in the world. 7 days free time and customs clearance often happens within 24–48 hours when paperwork is clean. The risk in China is GACC product registration — if your facility isn't registered, the container won't move at all and demurrage runs until you get the registration sorted.

What We Recommend at U.S. International Foods

If you're a new importer, the simplest move is to work with an exporter who runs the pre-arrival side for you. We coordinate the documents, brief the customs broker, and time the trucking — the importer's only job is to take delivery. That's how we keep demurrage off our containers, and it's how we expect our shipping partners to keep them off yours.

If you're scaling and shipping more than one container a month, the move is to formalize a 14-day merged free time agreement with a single shipping line, lock in a single broker on each lane, and run the same checklist on every shipment. The first three months are work. After that it runs on autopilot. To get started or audit your current process, see our export services or read the full beginner's guide to importing American food.