Flours — HTS 0309
Flours, meals and pellets of fish, crustaceans, molluscs and other aquatic invertebrates, fit for human consumption
Chapter 03 › Heading 0309
2026 HTS Rev 19 Synced Rules verified Operational
Written to help non-specialists understand this page. Rates, dates, and legal facts come from the official records above and on the linked source.
HTS heading 0309 is a product category for flours, meals, and pellets made from fish, crustaceans, molluscs, or other aquatic invertebrates, when the product is fit for human consumption. In plain language, it groups processed aquatic-animal products that have been ground, milled, or formed into pellets, rather than grouping all seafood products generally.
To reach the correct 8-digit HTSUS code, first confirm that the product belongs in heading 0309 and is intended and suitable for human consumption. Then use the heading’s subheadings and tariff descriptions to narrow the classification, commonly by the aquatic material or type and sometimes by the product’s specific form or composition. The product’s ingredients, manufacturing process, and labeling may all matter; if the wording is unclear, a customs broker or binding classification ruling may be appropriate.
What to check
- Confirm that the product is fit for human consumption and is actually a flour, meal, or pellet, rather than a different seafood preparation.
- Identify the exact source material—such as a particular fish, crustacean, mollusc, or other aquatic invertebrate—and compare it with the subheading descriptions.
- Review the full ingredient list and manufacturing process, including whether materials are mixed or contain added substances that could affect classification.
- Read the complete 8-digit HTSUS descriptions and relevant legal notes; do not classify from the heading title alone.
- Keep product specifications, labels, technical sheets, and composition records, and ask a customs professional to review ambiguous cases.
HTS heading 0309 summary
Flours is a 4-digit product category containing 0 published product-code lines in this snapshot. A heading does not carry one universal duty rate; classification must be narrowed to the line matching the product facts.
How to find your code in this category
A heading is a product category. To get the exact duty, narrow from this 4-digit heading to a sub-category (usually by material), then open the 8-digit code that matches your product.
Open any code in the tables below to see its exact duty rate, a duty calculator (enter your shipment value → estimated duty and landed cost), the rate-change history chart, and the country-by-country breakdown (including Section 301/232 add-on duties).
Why you have to click in: a single category can contain products with very different duties. The rate depends on the specific product — its material and construction — and on the country of origin, and those only get pinned down at the 8-digit code level. That is why this page points you to codes instead of showing one rate for the whole category.
Sub-categories
| Code | Description |
|---|---|
| 0309.10 | Of fish |
| 0309.90 | Other |
Common questions
What products fall under HTS heading 0309?
Flours, meals and pellets of fish, crustaceans, molluscs and other aquatic invertebrates, fit for human consumption. To classify a specific item you must pick the matching sub-category and 8-digit code above; the right choice usually depends on the material and construction of the product.
How do I choose the right code within this category?
Start from the sub-categories (typically divided by material—for example cotton versus man-made fibers), then open the active 8- or 10-digit code that matches the product. When unsure, a licensed customs broker or a CBP binding ruling can confirm the classification.
Reference information only, not customs, legal, or classification advice. Confirm the current code and rate against the official HTS before you import.