HTS 5509.21.00.00: US import duty from China
Yarn (other than sewing thread) of synthetic staple fibers, not put up for retail sale, Containing 85 percent or more by weight of polyester staple fibers, Single yarn (604). Here is the full China to US duty stack and what it costs to land.
Duty rate & fees
| Charge | Rate |
|---|---|
| Base duty (MFN) | 9.7% |
| Section 301 (Lists 1-4) | 25% |
| Total duty (on customs value) | 34.7% |
| Merchandise Processing Fee (MPF) | 0.3464% (min $33.58, max $651.50) |
| Harbor Maintenance Fee (HMF), ocean | 0.125% |
Worked example: $10,000 shipment
| Customs value | $10,000.00 |
| Base duty (MFN) | $970.00 |
| Section 301 (Lists 1-4) | $2,500.00 |
| Merchandise Processing Fee | $34.64 |
| Harbor Maintenance Fee | $12.50 |
| Total landed cost | $13,517.14 |
Excludes freight and insurance. Run your exact numbers in the calculator →
FAQ
What is the import duty on HTS 5509.21.00.00 from China?
Goods classified under HTS 5509.21.00.00 (Yarn (other than sewing thread) of synthetic staple fibers, not put up for retail sale, Containing 85 percent or more by weight of polyester staple fibers, Single yarn (604)) have a duty of 34.7% of the customs value on the China to US lane (base rate plus any Section 301 tariff), plus the Merchandise Processing Fee (0.3464%, min $33.58, max $651.50) and, for ocean shipments, the Harbor Maintenance Fee (0.125%).
What does HTS code 5509.21.00.00 cover?
Yarn (other than sewing thread) of synthetic staple fibers, not put up for retail sale, Containing 85 percent or more by weight of polyester staple fibers, Single yarn (604). US Customs and Border Protection determines the final classification at entry.
How much does it cost to import HTS 5509.21.00.00 from China?
On a $10,000 shipment, the estimated total landed cost is $13,517, about 35.2% in duty and fees. Use the calculator for your exact value, quantity, and shipping mode.
Related codes in heading 5509
- 5509.11.00.00Yarn (other than sewing thread) of synthetic staple fibers, not put up for retail sale, Containing 85 percent or more by weight of staple fibers of nylon or other polyamides, Single yarn (604)
- 5509.12.00.00Yarn (other than sewing thread) of synthetic staple fibers, not put up for retail sale, Containing 85 percent or more by weight of staple fibers of nylon or other polyamides, Multiple (folded) or cabled yarn (604)
- 5509.22.00.10Yarn (other than sewing thread) of synthetic staple fibers, not put up for retail sale, Containing 85 percent or more by weight of polyester staple fibers, Multiple (folded) or cabled yarn, Multiple (folded), with a final "Z" twist (200)
- 5509.22.00.90Yarn (other than sewing thread) of synthetic staple fibers, not put up for retail sale, Containing 85 percent or more by weight of polyester staple fibers, Multiple (folded) or cabled yarn, Other (604)
- 5509.31.00.00Yarn (other than sewing thread) of synthetic staple fibers, not put up for retail sale, Containing 85 percent or more by weight of acrylic or modacrylic staple fibers, Single yarn (604)
- 5509.32.00.00Yarn (other than sewing thread) of synthetic staple fibers, not put up for retail sale, Containing 85 percent or more by weight of acrylic or modacrylic staple fibers, Multiple (folded) or cabled yarn (604)
- 5509.41.00.10Yarn (other than sewing thread) of synthetic staple fibers, not put up for retail sale, Other yarn, containing 85 percent or more by weight of synthetic staple fibers, Single yarn, Of polyvinyl alcohol (PVA) fibers (604)
- 5509.41.00.90Yarn (other than sewing thread) of synthetic staple fibers, not put up for retail sale, Other yarn, containing 85 percent or more by weight of synthetic staple fibers, Single yarn, Other (604)
Estimates for planning only. Final classification and duty are determined by U.S. Customs and Border Protection at entry. Rates from USITC HTSUS 2026-06-15-cn-us. The IEEPA reciprocal tariff was struck down (SCOTUS, 2026-02-20) and is excluded. Not legal or customs-broker advice.