Tandom · Duty calculator
Add country and invoice value for the full duty stack — base + 301 + 232 + AD/CVD + fees.
HTS 5509.21.00.00 is the U.S. Harmonized Tariff Schedule classification for Single yarn (604). It's a 10-digit statistical line in Chapter 55: Man-made staple fibers, Section XI: Textiles and Textile Articles, used by U.S. Customs and Border Protection to determine the duty rate at entry. No Chapter 99 tariff modifications (Section 301, Section 232, IEEPA) or AD/CVD orders currently flag this code in Tandom's catalog.
New to HTS codes? Read our guide on how HTS classification works →
Past CBP decisions classifying real products under this HTS code. Useful precedent when classifying a similar product — each ruling shows how CBP interpreted the code for a specific case.
The tariff classification of yarn from Taiwan or Thailand
The tariff classification of two polyester spun yarns for manufacture into sewing thread, from China.
The tariff classification of polyester spun yarn, coated with acrylic powder, from Japan.
Source: CBP CROSS (view all rulings on rulings.cbp.gov →)
HTS 5509.21.00.00 is the U.S. Harmonized Tariff Schedule classification for Single yarn (604). It belongs to Chapter 55 of the HTSUS.
The general (Column 1) duty rate for HTS 5509.21.00.00 is 9.7%. This is the most-favored-nation (MFN) rate that applies to imports from World Trade Organization member countries.
Yes. Imports of HTS 5509.21.00.00 from countries party to a trade program (such as USMCA, KORUS, GSP, or the African Growth and Opportunity Act) may qualify for the special rate: Free (AU,BH, CL,CO,IL,JO,KR, MA,OM,P, PA,PE,S,SG). Eligibility depends on rules of origin and certification.
The Column 2 rate for HTS 5509.21.00.00 is 54%. This rate applies to imports from countries that do not have normal trade relations with the United States (currently Cuba and North Korea).
No active Chapter 99 tariff overlays (Section 301, Section 232, IEEPA reciprocal, etc.) currently flag HTS 5509.21.00.00 in Tandom's catalog. Use the calculator's date + origin inputs to confirm against any retroactive overlay you may be filing.
No active AD/CVD orders currently flag HTS 5509.21.00.00 in Tandom's catalog. Tandom monitors Federal Register notices daily; a flag will appear here within 24h of any new order's publication.
Free Trade Agreement and special-program eligibility
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