Demurrage vs Detention vs Storage Fees: What’s the Difference?

Many importers get a surprise bill after their goods reach a U.S. port. The bill may list demurrage, detention, or storage. These three fees sound alike, but they are not the same. This guide explains demurrage vs detention vs storage fees for imports in plain words.

What Is Free Time?

All three fees start with one idea: free time. Free time is the number of days you can use a container or a space without extra cost. When the free days run out, daily fees begin.

What Is Demurrage?

Demurrage is a daily fee for a full container that stays inside the port terminal too long. The fee starts after the free days end. It stops when a truck picks up the container. The fee pushes importers to clear terminal space.

What Is Detention?

Detention is a daily fee for keeping the carrier's container outside the terminal too long. The count starts when the container leaves the port. The fee stops when the empty container goes back to the place the carrier names. Some carriers call this fee "per diem," which means "per day."

What Are Storage Fees?

Storage fees are charges for keeping cargo in a place, such as a terminal, a container freight station (CFS), or a warehouse. Many terminals use the word "storage" for their own charge. Under the U.S. rule, any charge for the use of terminal space or shipping containers counts as demurrage or detention, whatever its name. Freight charges do not count (Federal Maritime Commission).

Storage can also happen away from the port. For example, an LCL shipment is unloaded at a CFS, and the CFS may charge storage after its free days.

U.S. customs adds one more risk. Goods without a release permit can stay at the place of unloading only until the 15th calendar day after landing. After that, the goods go to a general order (GO) warehouse. The receiver of the goods then carries the risk and pays the storage cost there (U.S. Customs and Border Protection).

Demurrage vs Detention vs Storage Fees: Side by Side

One container can face all three fees. It may sit too long at the terminal. Then it may stay too long at your warehouse. If the goods still have no release permit after 15 days, GO storage can follow.

Carriers and countries do not always use these words the same way. So you should check the carrier's price list and your own contract.

Your Rights When You Get a Bill

The Federal Maritime Commission (FMC) sets rules for demurrage and detention bills in the United States. These rules cover bills from ocean carriers, marine terminal operators, and NVOCCs. NVOCCs sell ocean shipping, but they do not run their own ships.

Each bill must list key facts, such as the bill of lading number, the container number, the free days with start and end dates, and the daily rate. If a bill leaves out required facts, you do not have to pay that charge.

The company must also send the bill within 30 calendar days of the last day of the charge. You then get at least 30 days to ask the company to lower, refund, or cancel the fee (Federal Maritime Commission).

How to Avoid These Fees

• Importers should prepare customs papers and complete their ISF filing early. Our guide on customs clearance documents, duties, and delays lists the common papers.
• You should book a truck early, so the container leaves the terminal within free time.
• Your team should unload fast and return the empty container quickly.
• If your goods must wait, you can unload them into a U.S. warehouse and return the empty container.
• You can also ask about free days before you book a full container load (FCL) shipment.

Final Thoughts

All three fees charge for time. The main difference is where that time passes. Demurrage covers time inside the terminal. Detention covers time outside with the carrier's container. Storage fees cover time in a terminal, CFS, or warehouse.

When you understand demurrage vs detention vs storage fees, you can plan paperwork and pickups early. Then small delays will not turn into large bills.