Harbor Maintenance Fee Explained: 2025 Guide

The harbor maintenance fee funds U.S. port infrastructure but adds to import costs. This 2025 guide covers its definition, calculation, exemptions, updates, and strategies for logistics managers and importers.

What is the Harbor Maintenance Fee?

The harbor maintenance fee (HMF) is a user fee imposed by U.S. Customs and Border Protection (CBP).

It supports dredging and maintenance of U.S. harbors used by commercial vessels.

Applies to most cargo imports, exports, and domestic shipments through designated ports.

History and Purpose of the Harbor Maintenance Fee

Congress established the HMF in 1986 under the Water Resources Development Act.

Its core purpose funds the Harbor Maintenance Trust Fund managed by the U.S. Army Corps of Engineers.

• Funds channel deepening and widening.
• Supports breakwater repairs and navigational aids.
• Collected since 1987 at 0.125% of cargo value.
• Generates over $1.8 billion annually for port projects.

Which Ports Require Harbor Maintenance Fees?

Not all U.S. ports charge the HMF.

Only ports subject to the Port Use Fee under 19 CFR 24.24 qualify.

Examples include major gateways like Los Angeles, New York, and Houston.

Who Pays the Harbor Maintenance Fee?

Importers of record bear primary responsibility.

Fee applies to cargo value for most vessel shipments into HMF ports.

1. Importers on formal entries (over $2,500).
2. Export shippers for loaded cargo.
3. Domestic shippers via barge or vessel.
4. Passengers on cruise ships (per person fee).
5. Exempt: Certain government and humanitarian cargo.

How to Calculate Harbor Maintenance Fee

Calculation is straightforward based on shipment value.

HMF equals 0.125% of the cargo value entering or leaving the port.

Formula: Cargo Value × 0.00125 = HMF Amount.

Exclude foreign repairs or non-dutiable value if applicable.

2025 Harbor Maintenance Fee Rates and Exemptions

Rates remain stable, but exemptions evolve.

In 2025, the standard HMF rate stays at 0.125% with targeted relief.

• Exempt: Shipments under $100 via informal entry.
• Exempt: U.S. goods exported and returned.
• Exempt: Vessels under 21 feet or non-commercial.
• New 2025: Expanded relief for green energy cargo.
• Exempt: Foreign military sales.

Key 2025 Updates to Harbor Maintenance Fee

U.S. infrastructure investments drive changes.

2025 brings expanded exemptions amid port congestion relief acts.

No WCO revisions until 2027, but national bills adjust collections.

1. Increased funding allocation to $2 billion.
2. New exemptions for EV battery imports.
3. Digital reporting mandates via ACE system.
4. Penalties for late payment up 10%.

Impact of Harbor Maintenance Fee on Supply Chains

HMF influences landed costs significantly.

For high-value cargo, HMF can add 1-2% to total logistics expenses.

• Raises import pricing for retailers.
• Affects competitiveness in global trade.
• Drives port diversification strategies.
• 2025 case: Electronics importer rerouted via Savannah, cutting HMF by 20%.
• Integrates with trade finance calculations.

Strategies to Minimize Harbor Maintenance Fee Costs

Proactive planning reduces burdens.

Optimize routes and entries to lower harbor maintenance fee exposure.

1. Select non-HMF ports like inland waterways.
2. Bundle shipments for informal entry thresholds.
3. Leverage exemptions for qualifying goods.
4. Use FTZs to defer fees.
5. Monitor 2025 updates via CBP bulletins.

Conclusion

Mastering the harbor maintenance fee ensures smoother 2025 imports.

Streamline compliance with expert tools.

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