# United States tariff lines under HS 0307.31

> The United States tariff splits HS 0307.31 (mussels (Mytilus spp., Perna spp.): Live, fresh or chilled) into 2 national lines: 0307.31.00.10 (farmed) and 0307.31.00.90 (other). Every United States line under 0307.31 is free of general (MFN) duty.

Source: https://border.bot/countries/united-states/hs-codes/030731
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 03](https://border.bot/countries/united-states/hs-codes/03) / [0307.31](https://border.bot/countries/united-states/hs-codes/030731)

## Key facts

- HS subheading: [0307.31](https://border.bot/hs-codes/030731)
- Duty (MFN): Free
- National lines: 2
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 03: Fish and crustaceans, molluscs and other aquatic invertebrates

## United States lines under 0307.31

The United States tariff splits HS 0307.31 (mussels (Mytilus spp., Perna spp.): Live, fresh or chilled) into 2 national lines: 0307.31.00.10 (farmed) and 0307.31.00.90 (other).

Every United States line under 0307.31 is free of general (MFN) duty.

- [0307.31.00.10](https://border.bot/countries/united-states/hs-codes/0307310010) Mussels (Mytilus spp., Perna spp.), Live, fresh or chilled, Farmed. Duty (MFN): free
- [0307.31.00.90](https://border.bot/countries/united-states/hs-codes/0307310090) Mussels (Mytilus spp., Perna spp.), Live, fresh or chilled, Other. Duty (MFN): free

## In other countries

No other national tariff on border.bot has live lines under 0307.31 yet.

- [The Harmonized System text for 0307.31](https://border.bot/hs-codes/030731)

- Previous subheading: [0307.29](https://border.bot/countries/united-states/hs-codes/030729) 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
- Next subheading: [0307.32](https://border.bot/countries/united-states/hs-codes/030732) 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

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 0307.31?

The United States tariff splits HS 0307.31 (mussels (Mytilus spp., Perna spp.): Live, fresh or chilled) into 2 national lines: 0307.31.00.10 (farmed) and 0307.31.00.90 (other).

### What is the duty on HS 0307.31 in the United States?

Every United States line under 0307.31 is free of general (MFN) duty.

## Sources and updates

The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

This page was last updated on 9 October 2026.

Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.

Official source files:

- https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false

Machine-readable: https://border.bot/countries/united-states/hs-codes/030731.json