What is HS 550921?
HS 550921 covers yarn containing 85% or more by weight of polyester staple fibers, put up for retail sale or used as an intermediate in further textile processing. It is a spun yarn — distinct from filament yarn — produced by carding or combing polyester staple fibers and twisting them into continuous strands. End uses span apparel fabrics, woven and knitted home textiles, upholstery, and selected industrial textile applications including filtration and geotextile composites.
When classifying shipments, note the threshold: blended yarns containing less than 85% polyester staple fiber fall into different subheadings and may attract different duty rates. Customs brokers should verify fiber composition certificates at origin to avoid misclassification and post-entry amendments.
Top Sourcing Countries for Polyester Staple Fiber Yarn
Trade flows for HS 550921 are heavily concentrated among a small group of Asian producers, with China, Indonesia, India, Vietnam, and Pakistan collectively accounting for the bulk of global export volumes in 2023.
- China is the dominant supplier into Brazil, Vietnam, and Indonesia, commanding near-total import share in several corridors. Its scale of integrated polyester production gives Chinese exporters a structurally advantaged cost position. Vietnam's import mix is almost entirely China-sourced, reflecting tight regional supply chain integration.
- Indonesia is a significant secondary exporter, particularly competitive into India and Brazil. Its market share in the India corridor is substantial, making it a meaningful alternative to Chinese origin for buyers seeking supply diversification.
- India both imports and re-exports within the regional yarn trade, receiving volumes from China, Indonesia, and Vietnam. It functions as both an end-use manufacturing hub and a transshipment-adjacent node.
- Vietnam is an emerging re-export origin, with volumes flowing into India — a pattern worth monitoring for origin compliance purposes given Vietnam's own high dependency on Chinese yarn inputs.
- Pakistan is the primary supplier to the US market among the tracked corridors, holding a meaningful share of US import volumes and benefiting from established textile trade relationships.
Import Duty Rates and Trade Agreements
India applies a flat 5.0% MFN duty on HS 550921 imports regardless of origin — China, Turkey, Cambodia, Vietnam, Indonesia, Thailand, Belgium, and the United States all face the same rate. This uniform MFN structure means FTA preferences offer limited tariff advantage for the Indian market under current agreements. Procurement teams sourcing into India should focus on total landed cost rather than duty arbitrage.
The United States applies a 12.0% MFN duty on HS 550921. However, under USMCA, imports from both Canada and Mexico qualify for a 0.0% preferential rate — a material cost advantage for buyers who can source or route through USMCA-qualifying supply chains. For US importers currently paying MFN rates on Asian-origin yarn, evaluating USMCA-compliant sourcing or cut-and-sew arrangements in Mexico represents a tangible duty saving opportunity.
Cost Drivers and Price Outlook
Polyester staple fiber yarn pricing is directly tied to crude oil, since purified terephthalic acid (PTA) and monoethylene glycol (MEG) — the key polyester precursors — are petroleum derivatives. Brent crude was tracking near $69.40/bbl as of February 2026 data, reflecting a month-on-month increase of approximately 7.4%. Sustained crude price increases will transmit into higher polyester fiber costs with a typical lag of four to eight weeks, putting upward pressure on HS 550921 input costs through mid-2025.
Cotton price movements also influence polyester yarn pricing indirectly. When cotton prices rise, spinners and buyers shift demand toward polyester blends, tightening polyester yarn supply and supporting price levels. Currency fluctuations — particularly CNY, IDR, and PKR movements against the USD — affect the competitiveness of each exporting origin and should be monitored alongside commodity benchmarks.
Energy costs remain a meaningful overhead component for spinning mills. Markets with subsidised industrial energy or lower electricity tariffs, such as certain Chinese provinces and Pakistani textile zones, maintain a cost-competitive production base relative to higher-energy-cost origins.
Compliance and Sourcing Considerations
HS 550921 carries a medium transshipment risk rating. The Vietnam corridor warrants particular attention: Vietnam imports the large majority of its polyester staple fiber yarn from China, meaning goods may be minimally processed and re-exported with Vietnamese origin documentation. US and EU importers subject to origin-based trade measures should request mill certificates, fiber composition declarations, and substantial transformation evidence when sourcing from Vietnam or other intermediate-origin suppliers.
Supply concentration risk is rated medium. While China dominates several trade lanes, Indonesia and Pakistan provide viable alternative origins. Procurement teams should maintain at least two qualified suppliers across different origin countries to hedge against policy disruption, port congestion, or sudden tariff changes.
How to Source Polyester Staple Fiber Yarn Efficiently
For procurement managers and freight forwarders working with HS 550921, the following verification steps reduce cost and compliance exposure:
- Confirm fiber content certification at origin — misclassification between 550921 and adjacent subheadings has duty and compliance consequences.
- Benchmark landed cost across at least three origins, factoring in MFN or FTA duty rates, freight, and lead time variability.
- For US imports, evaluate USMCA eligibility to capture the 12-point duty advantage over standard MFN sourcing from Asia.
- Request mill-level origin documentation when sourcing from Vietnam to mitigate transshipment risk exposure.
- Track crude oil and PTA price indices on a monthly basis — these are leading indicators for yarn price movements four to eight weeks forward.
- Use trade flow data to identify market share shifts between Chinese and Indonesian suppliers, which often signal pricing inflection points.
Get a free sourcing intelligence report for HS 550921 at Logitality.com