Harmonized Tariff Schedule of the United States · HTS code · HS 3907.99
3907.99.20: Other polyesters, primary: Thermoplastic liquid crystal aromatic polyester copolymers
Other polyesters, primary
Not declarable on its own: use one of its 1 subdivisions Data: Harmonized Tariff Schedule of the United States · checked on 24 October 2026
- 3907 Polyacetals, other polyethers and epoxide resins, in primary forms; polycarbonates, alkyd resins, polyallyl esters and other polyesters, in primary forms:
- Other polyesters:
- 3907.99 Other:
- 3907.99.20 Thermoplastic liquid crystal aromatic polyester copolymers
What you pay
Importing into USA
US additional duties of HTS chapter 99 in force on 22 October 2026 are included (Section 301, 232, 338 and 201). IEEPA duties are no longer collected after the Supreme Court ruling of February 2026. Conditional exemptions (US content, end use, metal share) are not computed: check the provision.
Additional duties and import rules
Charges on top of the customs duty, and rules the goods must meet at the border.
Additional duties and charges 1
- Additional dutySection 301 — China — technology transfer, IP and innovation (2018 actions and 2024 four-year review) 25%
- Applies to goods from
- China
- In force
- from 23 August 2018
- Legal act
- HTSUS 9903.88.02
Same subheading in other tariffs
3907.99 Polyacetals, other polyethers and epoxide resins: other polyesters, other
UK Free – 6% Third-country duty 9 tariff lines · average 4% 
EU Free – 6.5% Third-country duty 3 tariff lines · average 2.2% 
Türkiye Free – 6.5% Third-country duty 3 tariff lines · average 4.3% 
Canada Free Third-country duty 2 tariff lines 
Mexico Free – 6% Third-country duty 12 tariff lines · average 1.8% 
Brazil Free – 20% Third-country duty 9 tariff lines · average 5% 
Argentina Free – 12.6% Third-country duty 13 tariff lines · average 6.8% 
Peru Free Third-country duty 1 tariff line 
New Zealand Free – 5% Third-country duty 3 tariff lines · average 1.7% 
Japan Free – 3.1% Third-country duty 3 tariff lines · average 2.1% 
Taiwan Free – 3.5% Third-country duty 3 tariff lines · average 2% 
GCC 5% Third-country duty 1 tariff line 
Switzerland Free Third-country duty 1 tariff line 
Norway Free Third-country duty 2 tariff lines 
North Macedonia Free – 5% Third-country duty 4 tariff lines · average 3.8% 
Nigeria 5% Third-country duty 1 tariff line USA lines: 3907.99
Binding rulings for similar goods
Decisions of U.S. Customs and Border Protection (CROSS) and HMRC (Advance Tariff Rulings) on goods classified here. A ruling binds only its holder, but shows how the authorities classify similar goods. The descriptions are the authorities’ own, in English.
- N352351 U.S. CBP
The tariff classification and country of origin of a polybutylene succinate (PBS)-starch composite
- N353667 U.S. CBP
The tariff classification of Miramer AS2010, Miramer AS4004 and Miramer PE250 from South Korea
- N341500 U.S. CBP
The tariff classification and country of origin of polybutylene adipate terephthalate (PBAT) compound
- N332390 U.S. CBP
The tariff classification of polybutylene succinate (CAS# 25777-14-4) from China
5 rulings in total for this code
Legal notes
In the Harmonized Tariff Schedule of the United States, 3907.99.20 is one of 2 lines under subheading 3907.99, polyacetals, other polyethers and epoxide resins: other polyesters, other.
The general duty is free, and quantities are declared in kg.
For the same subheading, the UK duty is 0%–6%, the EU duty is 0%–6.5%, the Türkiye duty is 0%–6.5%, the Canada duty is free, the Mexico duty is 0%–6%, the Brazil duty is 0%–20%, the Argentina duty is 0%–12.6%, the Peru duty is free, the New Zealand duty is 0%–5%, the Japan duty is 0%–3.1%, the Taiwan duty is 0%–3.5%, the GCC duty is 5%, the Switzerland duty is free, the Norway duty is free, the North Macedonia duty is 0%–5% and the Nigeria duty is 5%.
The United States imported goods of subheading 3907.99 worth US$662m in 2024; the largest supplier was Taiwan, and the United Kingdom ranked 6th with US$45m.
Questions and answers
What is the USA import duty for HTS code 3907.99.20?
The general duty in the Harmonized Tariff Schedule of the United States is free; the supplementary unit is kg. Preferential rates for goods from agreement countries, anti-dumping duties and VAT are not included.
Where does the United States import these goods from?
For subheading 3907.99 as a whole, the largest supplier in 2024 was Taiwan (US$105m), followed by Canada.