Fats and oils and their fractions — HTS 1504
Fats and oils and their fractions, of fish or marine mammals, whether or not refined, but not chemically modified
Chapter 15 › Heading 1504
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 1504 is a broad product category for fats and oils, and their fractions, obtained from fish or marine mammals. It can include products that are crude or refined, as long as they have not been chemically modified. “Fractions” are separated parts of an oil or fat, such as portions with different characteristics, rather than a completely different chemically modified product.
The 4-digit heading is only the starting point. To reach the correct 8-digit HTSUS subheading, follow the tariff structure beneath heading 1504 and identify the product’s material or type, such as the source animal or the particular oil or fraction described. Review the full legal wording, section and chapter notes, and any relevant statistical suffix. If the product has been chemically altered, contains added ingredients, or is a finished preparation rather than an oil or fat itself, another heading may apply.
What to check
- Check the exact source: identify the fish or marine mammal and confirm it is covered by the subheading’s wording.
- Determine whether the product is a whole oil or fat, a separated fraction, or a prepared blend or formulation.
- Confirm whether it is merely refined or has been chemically modified; chemical modification can move it outside heading 1504.
- Read every level of the HTSUS code, including product descriptions, notes, and the 8-digit statistical suffix.
- Compare the tariff description with the commercial documents and product specifications; ask a customs broker or request a formal ruling if the classification is uncertain.
HTS heading 1504 summary
Fats and oils and their fractions is a 4-digit product category containing 1 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 |
|---|---|
| 1504.10 | Fish-liver oils and their fractions |
| 1504.20 | Fats and oils and their fractions, of fish, other than liver oils |
Product codes & duty rates
👇 Each row is a specific product code — click a blue code to open its full page with exact duty rates by country, the rate-history chart, and a duty calculator. 👉
| Code | Description | General (MFN) | Special | Column 2 |
|---|---|---|---|---|
| 1504.30.00.00 👉 | Fats and oils and their fractions, of marine mammals | 1.7¢/kg + 5% | Free | 6.6¢/kg + 20% |
"Special" shows the free-trade-agreement rate; open a code to see exactly which countries qualify.
Common questions
What products fall under HTS heading 1504?
Fats and oils and their fractions, of fish or marine mammals, whether or not refined, but not chemically modified. 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.