Insight
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Demurrage vs Detention: What’s the Difference and How to Avoid Them
Demurrage and detention are the two late fees that hit shipping containers, one at the port, one after pickup. How they differ, what they cost, and how to avoid them. (Updated 5/7/26)
Published on June 6, 2024
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TL;DR
Demurrage and detention are two late fees the carrier charges on every shipping container. Demurrage runs while the container is still in the port. Detention runs after you pick it up and don't return the empty in time. Both can stack into thousands per container fast. The fix is faster pickup, faster unload, and a drayage partner who knows the local terminals.
What is demurrage?
Demurrage is the fee the ocean carrier charges when your loaded container sits at the port past the free time written into your contract. Free time is usually 4 to 7 days, sometimes less in tight ports. Once you blow past that day, demurrage starts. The fee scales by tier: lower for the first few overage days, higher after that.
What is detention?
Detention is the fee the carrier charges when you have already pulled the container out of the port but have not returned the empty within free time. Free time on detention is usually 5 to 10 days from pickup. After that, you owe per-day detention until the empty is back at the terminal.
For trucking, "detention" can also mean driver wait fees, the extra hours a truck driver sits at your dock. That is a different fee billed by the trucker, not the ocean carrier. Same word, different bucket.
Demurrage vs detention: side-by-side
The simplest way to keep them straight:
Demurrage = the container is still inside the terminal
Detention = the container is outside the terminal
Both fees apply to the carrier-owned container
If you blow free time on both ends, you pay both
How carriers calculate D&D charges
The math is per day, per container, with tiered rates. A typical structure looks like this:
Days 1 to 5: free
Days 6 to 10: $200 per day
Day 11 and after: $400 per day or higher
Every carrier sets their own tiers. Some ports add a per diem layer on top. By day 14 you can be paying $5,000 or more on a single container. Watch the last free day closely so the meter never starts.
Why D&D fees pile up so fast
Most charges trace back to one of these:
Customs hold, paperwork stuck, container cannot move
No chassis available, no way to pull the box out
No appointment slot at the terminal
Warehouse is full, you cannot unload
Driver cannot access the gate before cutoff
Importer did not return the empty in time
Any one of those eats your free time. Stack two and you are already in fees.
How to avoid demurrage and detention
The high-leverage moves:
File ISF and customs paperwork early so the container clears before it lands
Pre-book your drayage so a chassis is locked in for the day after discharge
Schedule warehouse receiving before the container arrives, not after
Use a drayage carrier that books appointments inside the terminal portal
Return empties the same day you unload, do not sit on them
Negotiate longer free time in your master service agreement when you have leverage
A good drayage partner does most of this for you. See how port congestion shapes drayage timing and how drayage moves containers from port to warehouse.
What the FMC's 2024 rule changed
The Federal Maritime Commission's Demurrage and Detention Billing Rule went live May 28, 2024. It tightened what carriers can bill for and forced clearer invoices. The big shifts: bills have to land within 30 days, charges have to be itemized per day, and the right paying party has to be named. If your invoice is missing required fields, you can dispute it. The rule does not kill D&D fees, but it gives shippers a real path to push back on bad ones.
How 3PL Center cuts D&D risk
We run drayage out of warehouses near the ports, in California and New Jersey. Our trucks pull containers fast and we have eyes on the terminal queue. Our real-time WMS shows container status from discharge to dock, so you know what is hitting free time before it does. Most clients land their containers, get them unloaded, and return empties inside the carrier's free window. No D&D added to the bill.
Demurrage and Detention FAQs
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Stuck paying demurrage and detention fees?
Our drayage trucks run out of warehouses near the California and New Jersey ports. We pull containers fast, track them in real time, and most clients clear free time without paying a dime in D&D. Get a quote and we will show you what your container risk looks like.