HTS Browser / Section III — Animal or vegetable fats & oils / Chapter 15 / Heading 1504 / 1504
HTS 1504 Chapter 15 Section III Synced Apr 28, 2026

Fats and oils and their fractions, of fish or marine mammals, whether or not refined, but not chemically modified:

Fats and oils and their fractions, of fish or marine mammals, whether or not refined, but not chemically modified:

Base HTS duty
Column 1 General
Effective (Vietnam)
15%
Ch. 99
Stacked measures
1
at Vietnam
Last change
2 months
Ch. 99 15.0%

What this covers

Fats and oils and their fractions derived from fish or marine mammals, whether refined or unrefined, that have not undergone chemical modification.

cod liver oil tuna fat seal oil shark oil
Duty stack · origin vietnam

How the 15.0% is built.

0%3.8%7.7%11.5%15.4%
122 · 15.0%
Section 122
All origins except · 9903.01.80
+15.00%
MPF (merchandise processing)
0.3464% · min $31.67 / max $614.35
+0.35%
Effective ad valorem duty (excl. fees)
15.00%
Stacking order
  1. 1
    Apply base HTS rate
    Column 1 General (MFN) or Special (FTA)
  2. 2
    Add Section 301 (if origin qualifies)
    Chapter 99 subheading layered on
  3. 3
    Add IEEPA / 232 surcharges
    Country-scoped emergency measures
  4. 4
    Add MPF & HMF fees
    Applied to entered value

You may also consider

  • 1504.10

    Fats and oils of fish, whether or not refined, but not chemically modified.

  • 1504.20

    Fats and oils of marine mammals, whether or not refined, but not chemically modified.

  • 1504.90

    Other fats and oils of fish or marine mammals, whether or not refined, but not chemically modified.

Origin matters

Rate by country of origin

Same HTS, very different landed cost. Here's how 1504 looks from the top trading partners — on a $10,000 shipment.

FTA partner Section 301 IEEPA in effect
Rates from last sync on Apr 28, 2026 · assumes entered value $10,000 · fees (MPF/HMF) excluded from the comparison above.
Questions about 1504

FAQ for this HTS code.

What is this HTS code?

This is a US Harmonized Tariff Schedule (HTS) code that classifies "Fats and oils and their fractions, of fish or marine mammals, whether or not refined, but not chemically modified:". It determines base duty rates for imports; additional duties may apply by country of origin.

Does origin affect duty?

Yes. General and Special rates apply by trade agreement and origin. Additional duties (Section 301, 232, IEEPA) are origin-specific. Use the tariff calculator or resolve API with an origin to see full duty.

How do I compute total duty?

Use our tariff calculator (with HTS and optional origin) or the API endpoint GET /api/v1/tariffs/resolve with hts and origin. The API returns base tariffs and additional measures separately; sum as needed for your use case.

Never miss a rate change on 1504.
We'll email you within an hour of any measure affecting this code.
Tariff data is informational; final determinations are made by CBP.
HTS 1504 · synced Apr 28, 2026 14:34 UTC