Section I · Fish, crustaceans, molluscs and other aquatic invertebrates

0304.83

Flat fish (Pleuronectidae, Bothidae, Cynoglossidae, Soleidae, Scophthalmidae, and Citharidae):

How this code is built
03

Chapter

Fish, crustaceans, molluscs and other aquatic invertebrates

04

Heading

The product family within the chapter

83

Subheading

The specific good, identical worldwide

The first six digits are the same in every country that uses the Harmonized System. The United States adds two more for the tariff rate and, often, two more for statistics — which is why the rates below are listed against 8- and 10-digit numbers rather than against this code.

How the schedule reaches this code

  1. 03Fish, crustaceans, molluscs and other aquatic invertebrates
  2. 0304Fish fillets and other fish meat (whether or not minced), fresh, chilled or frozen:
  3. Frozen fillets of other fish:
  4. Flat fish (Pleuronectidae, Bothidae, Cynoglossidae, Soleidae, Scophthalmidae, and Citharidae):

Published US duty rates

Duty is set at the 8- or 10-digit line, not at this 6-digit subheading, so more than one rate can sit under this code.

  • 0304.83.10Skinned, whether or not divided into pieces, and frozen into blocks each weighing over 4.5 kg, imported to be minced, ground or cut into pieces of uniform weights and dimensions
    General
    Free
    Special (FTA)
    —

    No preferential rate published.

    Column 2
    2.8¢/kg

    Countries without normal trade relations.

  • 0304.83.50Other
    General
    Free
    Special (FTA)
    —

    No preferential rate published.

    Column 2
    5.5¢/kg

    Countries without normal trade relations.

Schedule footnotes

  • See 9903.88.03.

A reference to Chapter 99 means an additional action — a Section 232 or 301 measure, an exclusion, or a quota — applies on top of the rate above.

This is the listed rate. Antidumping and countervailing duty orders, Chapter 99 actions and preference qualification all change what is actually collected, and classification is a judgement about your goods. Verify with your licensed customs broker before you file.

Other subheadings in heading 0304

Source: U.S. International Trade Commission (USITC) — 2026 HTS Revision 12, released 2026-07-21, published at hts.usitc.gov. A U.S. Government work in the public domain.