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HTS heading 0307 · Chapter 03

HTS 0307: Molluscs, whether in shell or not, live, fresh,…

HTS heading 0307 covers molluscs, whether in shell or not, live, fresh, chilled, frozen, dried, salted or in brine; smoked molluscs, whether in shell or not, whether or not cooked before or during the smoking process. It has 28 tariff lines with a duty rate; the general (MFN) rates are Free (27 lines), 5% (1 line).

Imports may also owe Chapter 99 tariffs (Section 232, 301 or 201) depending on origin and date, plus the Merchandise Processing Fee and, by sea, the Harbor Maintenance Fee.

Rates from the 2026 HTS Revision 22, effective October 30, 2026. Source: U.S. International Trade Commission.

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Tariff lines and duty rates

HTS codeDescriptionGeneralSpecialColumn 2Estimate
Oysters:
0307.11.00Live, fresh or chilledFreeFree
0307.11.00.20Seed oysters[liters, kg]Estimate →
Other:
0307.11.00.60Farmed[kg]Estimate →
0307.11.00.80Other[kg]Estimate →
0307.12.00FrozenFreeFree
0307.12.00.60Farmed[kg]Estimate →
0307.12.00.80Other[kg]Estimate →
0307.19.01OtherFreeFree
0307.19.01.60Farmed[kg]Estimate →
0307.19.01.80Other[kg]Estimate →
Scallops and other molluscs of the family Pectinidae:
0307.21.00.00Live, fresh or chilled[kg]FreeFreeEstimate →
0307.22.00.00Frozen[kg]FreeFreeEstimate →
0307.29.01.00Other[kg]FreeFreeEstimate →
Mussels (Mytilus spp., Perna spp.):
0307.31.00Live, fresh or chilledFreeFree
0307.31.00.10Farmed[kg]Estimate →
0307.31.00.90Other[kg]Estimate →
0307.32.00.00Frozen[kg]FreeFreeEstimate →
0307.39.01.00Other[kg]FreeFreeEstimate →
Cuttle fish and squid:
0307.42.00Live, fresh or chilledFreeFree
Squid:
0307.42.00.20Loligo[kg]Estimate →
0307.42.00.40Other[kg]Estimate →
0307.42.00.60Other[kg]Estimate →
0307.43.00FrozenFreeFree
Squid:
0307.43.00.10Fillets[kg]Estimate →
Other:
Loligo:
0307.43.00.22Loligo opalescens[kg]Estimate →
0307.43.00.24Loligo pealei[kg]Estimate →
0307.43.00.29Other[kg]Estimate →
0307.43.00.50Other[kg]Estimate →
0307.43.00.60Other[kg]Estimate →
0307.49.01OtherFreeFree
Squid:
Loligo:
0307.49.01.22Loligo opalescens[kg]Estimate →
0307.49.01.24Loligo pealei[kg]Estimate →
0307.49.01.29Other[kg]Estimate →
0307.49.01.50Other[kg]Estimate →
0307.49.01.60Other[kg]Estimate →
Octopus (Octopus spp.):
0307.51.00.00Live, fresh or chilled[kg]FreeFreeEstimate →
0307.52.00.00Frozen[kg]FreeFreeEstimate →
0307.59.01.00Other[kg]FreeFreeEstimate →
0307.60.00.00Snails, other than sea snails[kg]5%Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)20%Estimate →
Clams, cockles and ark shells (families Arcidae, Arcticidae, Cardiidae, Donacidae, Hiatellidae, Mactridae, Mesodesmatidae, Myidae, Semelidae, Solecurtidae, Solenidae, Tridacnidae and Veneridae):
0307.71.00Live, fresh or chilledFreeFree
Clams:
0307.71.00.50Geoduck[kg]Estimate →
0307.71.00.70Other[kg]Estimate →
0307.71.00.90Other[kg]Estimate →
0307.72.00FrozenFreeFree
Clams:
0307.72.00.30Geoduck[kg]Estimate →
0307.72.00.51Stimsonʼs[kg]Estimate →
0307.72.00.55Other[kg]Estimate →
0307.72.00.60Other[kg]Estimate →
0307.79.01OtherFreeFree
Clams:
0307.79.01.30Geoduck[kg]Estimate →
0307.79.01.51Stimsonʼs[kg]Estimate →
0307.79.01.55Other[kg]Estimate →
0307.79.01.60Other[kg]Estimate →
Abalone (Haliotis spp.) and stromboid conchs (Strombus spp.):
0307.81.00.00Live, fresh or chilled abalone (Haliotis spp.)[kg]FreeFreeEstimate →
0307.82.00.00Live, fresh or chilled stromboid conchs (Strombus spp.)[kg]FreeFreeEstimate →
0307.83.00.00Frozen abalone (Haliotis spp.)[kg]FreeFreeEstimate →
0307.84.00.00Frozen stromboid conchs (Strombus spp.)[kg]FreeFreeEstimate →
0307.87.00.00Other abalone (Haliotis spp.)[kg]FreeFreeEstimate →
0307.88.00.00Other stromboid conchs (Strombus spp.)[kg]FreeFreeEstimate →
Other:
0307.91.03Live, fresh or chilledFreeFree
0307.91.03.30Conch[kg]Estimate →
0307.91.03.90Other[kg]Estimate →
0307.92.01FrozenFreeFree
0307.92.01.30Conch[kg]Estimate →
0307.92.01.90Other[kg]Estimate →
0307.99.03.00Other[kg]FreeFreeEstimate →

66 lines shown. Statistical suffixes (the last two digits) inherit the rate of the 8-digit subheading above them.

Example: base duty and fees on $10000

For HTS 0307.60.00.00 at the general rate of 5%, shipped by ocean, before any Chapter 99 tariffs:

Base duty (5%)$500.00
Merchandise Processing Fee (0.3464%, min $34.58)$34.64
Harbor Maintenance Fee (0.125%)$12.50
Duty and fees$547.14

Origin-specific tariffs can multiply this. Run this example from China or from Mexico to see every line.

Special program codes in this heading

A, A*, A+
Generalized System of Preferences (GSP)
AU
U.S.–Australia FTA
BH
U.S.–Bahrain FTA
CL
U.S.–Chile FTA
CO
U.S.–Colombia Trade Promotion Agreement
D
African Growth and Opportunity Act (AGOA)
E, E*
Caribbean Basin Economic Recovery Act
IL
U.S.–Israel FTA
JO
U.S.–Jordan FTA
KR
U.S.–Korea FTA (KORUS)
MA
U.S.–Morocco FTA
OM
U.S.–Oman FTA
P, P+
CAFTA-DR
PA
U.S.–Panama Trade Promotion Agreement
PE
U.S.–Peru Trade Promotion Agreement
S, S+
USMCA (United States–Mexico–Canada Agreement)
SG
U.S.–Singapore FTA

A special rate applies only when the goods qualify under that program's rules of origin and the claim is made at entry.

Frequently asked questions

What is the duty rate for HTS 0307?

Heading 0307 has 28 rate lines. The general (MFN) duty rates are Free (27 lines), 5% (1 line). Products of free trade agreement partners may enter at the special rate, and Column 2 rates apply to countries without normal trade relations. Chapter 99 tariffs can be added on top: calculate the full amount.

Do Section 301, 232 or 201 tariffs apply to HTS 0307?

It depends on the 8- or 10-digit subheading, the country of origin, the entry date and, for Section 232, the metal content. These additional duties are listed in Chapter 99 of the HTS. The free duty calculator checks each program for a given code, origin and date and shows which apply and why.

What fees are added to an import under HTS 0307?

Formal entries pay the Merchandise Processing Fee of 0.3464% of value (minimum $34.58, maximum $670.86 in FY2027). Ocean shipments also pay the Harbor Maintenance Fee of 0.125% of value. See the import duty calculator for how they combine.