HTS heading 5503 · Chapter 55
HTS 5503: Synthetic staple fibers, not carded, combed or…
HTS heading 5503 covers synthetic staple fibers, not carded, combed or otherwise processed for spinning. It has 8 tariff lines with a duty rate; the general (MFN) rates are 4.3% (6 lines), Free (2 lines).
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.
Tariff lines and duty rates
| HTS code | Description | General | Special | Column 2 | Estimate |
|---|---|---|---|---|---|
| Of nylon or other polyamides: | |||||
| 5503.11.00.00 | Of aramids[kg] | 4.3% | Free (AU,BH, CL,CO,IL,JO,KR, MA,OM,P, PA,PE,S,SG) | 25% | Estimate → |
| 5503.19 | Other: | ||||
| 5503.19.10.00 | Containing 10 percent or more by weight of nylon 12[kg] | Free | 25% | Estimate → | |
| 5503.19.90.00 | Other[kg] | 4.3% | Free (AU,BH, CL,CO,IL,JO,KR, MA,OM,P, PA,PE,S,SG) | 25% | Estimate → |
| 5503.20.00 | Of polyesters | 4.3% | Free (AU,BH, CL,CO,IL,JO,KR, MA,OM,P, PA,PE,S,SG) | 25% | |
| 5503.20.00.15 | Bi-component fibers having an outer copolymer sheath that melts at a lower temperature than the core, of a kind used for bonding fibers together[kg] | Estimate → | |||
| Other: | |||||
| 5503.20.00.25 | Measuring less than 3.3 decitex[kg] | Estimate → | |||
| 5503.20.00.45 | Measuring 3.3 decitex or more but less than 13.2 decitex[kg] | Estimate → | |||
| 5503.20.00.65 | Measuring 13.2 decitex or more[kg] | Estimate → | |||
| 5503.30.00.00 | Acrylic or modacrylic[kg] | 4.3% | Free (AU,BH, CL,CO,IL,JO,KR, MA,OM,P, PA,PE,S,SG) | 25% | Estimate → |
| 5503.40.00.00 | Of polypropylene[kg] | 4.3% | Free (AU,BH, CL,CO,IL,JO,KR, MA,OM,P, PA,PE,S,SG) | 25% | Estimate → |
| 5503.90 | Other: | ||||
| 5503.90.10.00 | Of vinyon[kg] | Free | 25% | Estimate → | |
| 5503.90.90.00 | Other[kg] | 4.3% | Free (AU,BH, CL,CO,IL,JO,KR, MA,OM,P, PA,PE,S,SG) | 25% | Estimate → |
12 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 5503.11.00.00 at the general rate of 4.3%, shipped by ocean, before any Chapter 99 tariffs:
| Base duty (4.3%) | $430.00 |
| Merchandise Processing Fee (0.3464%, min $34.58) | $34.64 |
| Harbor Maintenance Fee (0.125%) | $12.50 |
| Duty and fees | $477.14 |
Origin-specific tariffs can multiply this. Run this example from China or from Mexico to see every line.
Special program codes in this heading
- AU
- U.S.–Australia FTA
- BH
- U.S.–Bahrain FTA
- CL
- U.S.–Chile FTA
- CO
- U.S.–Colombia Trade Promotion Agreement
- 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.