HS Code for Wind Turbine Towers
The HS Code for wind turbine towers is 730820. The MFN duty rate for importing to the US is Free.
| HS Code (6-digit) | 730820 |
|---|---|
| US Duty Rate (MFN) | Free |
| EU Duty Rate (MFN) | 0% |
| Chapter | 73 |
| Heading | 7308 |
| Last Updated | 2026-05 |
Description
Towers and lattice masts of iron or steel
HS Code 730820 covers towers and lattice masts of iron or steel for wind turbines, with a US duty rate of Free.
Frequently Asked Questions
How does the material composition of a wind turbine tower (iron vs. steel) impact its HTS 730820 classification and duty rates?
Under HTS 730820, the classification for 'Towers and lattice masts' is based on the material being iron or steel, not on the specific alloy composition. However, the precise steel grade (e.g., carbon steel vs. alloy steel) can trigger different duty rates under the subheading, as the U.S. Harmonized Tariff Schedule specifies separate duty rates for products of iron or non-alloy steel versus those of stainless or other alloy steel. Therefore, importers must accurately declare the specific steel composition to determine the correct applicable duty.
What customs inspection risks are specific to importing wind turbine towers under HTS 730820?
Shipments are often targeted for intensive verification of origin to apply correct anti-dumping and countervailing duties (AD/CVD), particularly for towers from certain countries like China, Spain, and Vietnam. Inspectors will also closely examine the commercial invoice and packing list against the physical shipment to ensure the declared dimensions, weight, and value accurately reflect the massive, oversized components to prevent misclassification or undervaluation.
What are the major cost implications of importing wind turbine towers under HTS 730820, beyond the basic duty rate?
The primary additional cost is the Section 232 tariff on steel articles, which adds a 25% duty on top of the general HTS 730820 rate for most countries. Furthermore, due to their massive size and weight, wind towers incur substantial freight, specialized handling, and potentially port storage or demurrage fees that can significantly impact total landed cost.
Material Composition in Wind Tower Classification
HTS 730820 specifically covers towers and masts of iron or steel. Towers constructed from concrete or a composite of concrete and steel are excluded from this code and are generally classified elsewhere, such as under heading 6810 for articles of concrete. Similarly, towers made primarily from aluminum alloys would not be classified here and may fall under 7610.90 or 7616.99. The distinction is critical, as the material fundamentally changes the tariff schedule and applicable duty rates.
Other Structural Steel Components vs. Towers
Wind turbine towers are specifically classified under 7308.20. Be careful not to confuse them with other structural steel components of a wind turbine system. Tubular towers are clearly covered, but lattice or truss-type towers might be considered as 'other structures' under heading 7308.90. Furthermore, internal platforms, ladders, and electrical cabinets permanently installed within the tower are considered part of the tower assembly. The key distinction from general structures (7308.90) is the tower's primary function of supporting the nacelle and rotor at a required height.
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