---
title: "Harbor Maintenance Fee (HMF)"
description: "The Harbor Maintenance Fee (HMF) is assessed by U.S. Customs for products imported via ocean through U.S. ports. It is calculated at 0.125% of the cargo value declared on the commercial invoice, with no minimum or maximum."
language: en
canonical: https://www.flex.thisisbrew.com/glossary/harbor-maintenance-fee/
lifecycle: live
dateModified: 2026-08-20T06:44:09Z
topics:
  - "Customs & Compliance"
  - "Customs Brokerage"
---

# Harbor Maintenance Fee (HMF)

The Harbor Maintenance Fee (HMF) is assessed by U.S. Customs for products imported via ocean through U.S. ports. It is calculated at 0.125% of the cargo value declared on the commercial invoice, with no minimum or maximum.

## What is the Harbor Maintenance Fee (HMF)?

The Harbor Maintenance Fee (HMF) is assessed by U.S. Customs for products imported via ocean through U.S. ports.

If a shipment is transporting via ocean to a Canadian port, and routed through [Canada](https://www.flex.thisisbrew.com/company/global-network/canada/) into the U.S., it will not be subject to the HMF.

### How is the HMF calculated?

The HMF is calculated at **0.125% of the cargo value that was declared on the** [commercial invoice](https://www.flex.thisisbrew.com/help/commercial-invoice-packing-list/), with no minimum or maximum.

When applicable, the HMF appears on your invoice as a Customs charge. It will **not be included in your quote**, since at that stage, we don't yet know the total value of your shipment; however, if you wish, you may estimate it using the calculation above.

*Note: The HMF is assessed for both dutiable and duty-free products.*

Back to the [full glossary](https://www.flex.thisisbrew.com/glossary/).

---

*This is a markdown version of [https://www.flex.thisisbrew.com/glossary/harbor-maintenance-fee/](https://www.flex.thisisbrew.com/glossary/harbor-maintenance-fee/) for AI/LLM consumption.*