Harbor Maintenance Fee (HMF)

What Is the Harbor Maintenance Fee (HMF)?

The Harbor Maintenance Fee (HMF) is a fee charged by the US government on imported cargo (and some domestic cargo) moving through US ports, used to fund harbor dredging and maintenance.

How Does the HMF Work?

The HMF is calculated as a small percentage of the cargo's value and is typically assessed and collected at the time of import, on top of any applicable customs duties. It applies broadly to commercial cargo moving through US ports, regardless of the specific product category.

Why the HMF Matters

While the HMF is usually a small percentage of cargo value, it's a mandatory, easily overlooked line item that should be included when calculating total landed cost for US-bound ocean shipments, since it applies in addition to standard duties and other fees.